This report summarizes the work of the initial working phase of IEA ECB Annex 62 Ventilative Cooling and is based on the findings in the participating countries.

ventilative cooling

This summary report presents insights on recommendations into how ventilative cooling is integrated in EN standards, ISO standards, national standards, national legislation and national compliance

ventilative cooling

Overheating in buildings is an emerging challenge at the design stage and during operation.

ventilative cooling

Examples of well documented case studies that use ventilative cooling (VC) to reduce the energy demand for cooling or overheating risk in new and refurbished buildings are valuable to the energy in

ventilative cooling

This design guide is based on the work of IEA-EBC Annex 62 “Ventilative Cooling” and the research findings of the participating countries.

ventilative cooling

This background report presents insights on recommendations into how ventilative cooling is integrated in EN standards, ISO standards, national standards, national legislation and national complian

ventilative cooling

This report summarises the outcome of the work of the initial working phase of IEA ECB Annex 62 Ventilative Cooling and is based on the findings in the participating countries.

ventilative cooling

In general, but in particular in nearly zero-energy buildings, there is a very strong tendency to drastically reduce the heating demand.

ventilative cooling

Computer classrooms present challenges for cooling because internal heat gains higher than typical classrooms.

ventilative cooling | thermal comfort | phase change material | thermal storage | School buildings

Adopting natural ventilation as a low impact retrofit strategy for space cooling is attractive due to the cooling potential of untreated outdoor air for large periods of the extended cooling season

mean and fluctuating ventilation | dominant forces | warren plot | buoyancy asymptote

Worldwide the food system is responsible for 33% of greenhouse gas emissions. It is estimated that by 2050, the total food production should be 70% more than current food production levels.

energy use | food chain | ventilation | supermarkets | heat recovery | refrigeration | UK

One-year monitoring results of environmental conditions in a UK seminar room where the Cool-phase® ventilation and PCM battery system has been installed indicate thermal comfort and good indoor air

ventilative cooling | seminar room | thermal comfort | thermal storage | Phase change materials | operational data

This paper presents a thermal simulation validation study of the typical precision that a trained thermal simulation engineer can expect to obtain for the simulation of a room connected to a natura

thermal simulation | validation | double skin façade | EnergyPlus | natural ventilation | Passive House

Children spend the majority of their weekdays in classrooms that often have low indoor air quality and limited financial resources for the initial and running costs of mechanical ventilation system

displacement ventilation | natural ventilation | chimney | EnergyPlus | model validation

This paper presents a validation of airflow network (AFN) and computational fluid dynamics (CFD) simulations for a naturally ventilated office building using wind tunnel measurements as the referen

natural ventilation | CFD | simulation | validation | pressure coefficients | Airflow network

This paper presents a study of the impact of horizontal aperture separation in single-sided ventilation flows with two apertures (SS2).

Wind-driven | natural ventilation | Single-sided | wind tunnel

Cross-ventilation flows (CV) are characterized by significant inflow momentum conservation as fluid flows across an enclosed rectangular volume as a confined jet.

cross-ventilation | Natural-ventilation | CFD | Simplified model

Throughout history, natural ventilation has remained the preferred choice for the majority of residential buildings, while, in commercial buildings, natural ventilation went from being the single o

natural ventilation | single sided ventilation | stack | daylighting | Vortex shedding

Overheating in buildings is expected to increase as global warming continues.

overheating | climate change

Overheating in buildings has been identified as an essential cause of several problems ranging from thermal discomfort and productivity reduction to illness and death.

overheating risk | climate change | Residential building stock | thermal comfort | resilience | New metrics

Research indicates that low-energy dwellings are more sensitive to overheating than regular dwellings. In this research the ventilative cooling potential of low-energy dwellings is considered.

ventilative cooling | measurement | TRNSYS | Active House | Design guideline

The increasing number of highly insulated and air tight buildings leads to the concern of indoor environment overheating and related comfort and health issues.

ventilative cooling | Passive House | overheating

Reducing primary energy consumption is an essential issue for the sector of building construction.

Low pressure losses | passive cooling | natural ventilation | heat recovery

This paper presents the general concept of the NAC (Natural Air Conditioning)-wall system and some experimental results on a first prototype.

natural ventilation | Solar DEC | low energy cooling | Zeolite | HNAC

The study proposes and compares low-cost strategies to improve the quality of existing building stocks, with special regard to a widespread Indian residential typology.

Energy Retrofit | Air conditioning energy consumptions | occupants’ behaviour | thermal comfort | Energy dynamic simulation

The present study reports the results of a 12-month-long monitoring campaign of an earth-to-air horizontal heat exchanger (EAHX) system in a school complex in Imola, Italy.

Earth-to-air horizontal heat exchangers | ground cooling | Monitoring results | school building

This special issue on Breakthrough of natural and hybrid ventilative cooling technologies: models and simulations, together with the connected issue Breakthrough of natural and hybrid ventilative c

ventilative cooling | models | simulation | hybrid ventilation | natural ventilation

This study analyses the climate-dependent passive ventilative cooling (PVC) potential in central and southern Europe.

passive cooling | European climates | dynamic simulation | natural ventilation | cooling degree hours

The present study aims at assessing the geo-climatic potential applicability of controlled natural ventilation (CNV) as a natural ventilative cooling (NVC) technique in the Mediterranean area.

passive cooling | Natural controlled ventilation | night cooling | climate feasibility | GIS analysis | dynamic simulation

Different simplified simulation models of a Passive Downdraught Evaporative Cooling tower (PDEC) were compared by using experimental data.

direct evaporative cooling | PDEC | passive cooling | Comparison of simulation and calculated results | experimental data

The paper aims to evaluate the geo-climatic applicability of two different passive cooling strategies: the passive evaporative cooling (PEC) and the natural ventilative cooling (NVC) in China.

passive cooling | natural ventilative cooling | passive evaporative cooling | climate feasibility | geographic information system (GIS) analysis

This paper presents a parametric study on the effect of different TMY (Typical Meteorological Year) datasets on the results of energy dynamic simulation.

dynamic simulation | hourly typical meteorological years | building simulations | building energy performance

We present a study of natural ventilation design during the early (conceptual) stage of a building's design, based on a field study in a naturally ventilated office in California where we collected

natural ventilation | early-design-stage | uncertainty analysis | air change rates | Occupant behavior | Airflow network

Because of the customers’ need of best possible comfort condition and satisfaction, shopping centers are conditioned by means of basic HVAC systems, often without considering the potential of natur

Ventilative cooling potential | Ventilate Cooling Design Method | Shopping centers retrofit | Integrated Modelling Environment (IME) | cooling energy savings

Natural ventilation is widely applied to new building design as it is an effective passive measure to reach the Net Zero Energy target.

natural ventilation | Integrated design

The aim of our study was to determine the effect of a cooling jet on performance and comfort in warm office environment.

ventilation performance | thermal comfort | air velocity | Perception Offices

The experiments are carried out in a climate chamber located at the Department of Civil Engineering Aalborg University.

ventilation | Diffuse ceiling ventilation | Building constructions | Thermally activated building system | Experimental study

This work presents an energy assessment of the natural ventilation performance within buildings located on both hot-temperate and mild-temperate conditions such as the existing along the central re

Diffuse ceiling ventilation | Thermally activated building constructions | thermal comfort | Experimental study

This paper presents and analyses the performance of an integrated system with diffuse ceiling ventilation and a thermally activated building construction.

Diffuse ceiling ventilation | Thermally activated building constructions | thermal comfort | energy performance | Plenum

As a response to new energy policies in the building sector, office buildings have become well-insulated and highly-airtight, resulting in an increasing cooling need both in summer and in winter.

natural ventilation | Building thermal mass activation | Diffuse ceiling inlet | New system solution | energy saving potential

This paper investigates the dynamic cooling performance of a novel system combining natural ventilation with diffuse ceiling inlet and thermally activated building systems (TABS).

natural ventilation | thermally activated building systems (TABS) | Diffuse ceiling inlet | Dynamic performance | control strategy | thermal comfort

A novel HVAC system combining natural ventilation with diffuse ceiling inlet and thermally activated building systems (TABS) has the ability to fulfill the requirements of cooling and ventilation i

natural ventilation | Diffuse ceiling inlet | thermally activated building systems (TABS) | Cooling performance | Heat transfer coefficient

Many post-occupancy comfort studies of energy renovated residential buildings have documented elevated temperatures above comfort levels, not only during the summer period but also during the shoul

energy efficiency | insulation | retrofit | renovation | Adaptive thermal comfort | Overheating index | Comfort assessment | residential building | single family house

Buildings constructed before 1979 in Denmark are responsible for 75% of the total energy consumption of the sector.

residential building | renovation | passive measure | Building automation

In many post-occupancy studies of renovated houses elevated temperatures have been documented.

renovation | energy | assessment criteria

In the PSO project 345-061, a novel system solution combining natural ventilation with diffuse ceiling inlet and thermally activated building systems (TABS) has been proposed for cooling and ventil

natural ventilation | diffuse ceiling | Inlet | Thermally Activated Building Systems

This paper presents a comparative study based on CFD simulation between the performance of Impinging Jet Ventilation (IJV) and Mixing Ventilation (MV) systems in providing indoor air quality and th

large space | ventilation system | Air Distribution Index (ADI) | numerical model

Ventilative cooling can be used as a passive cooling measure to reduce the cooling energy demand of buildings.

Convective heat transfer coefficients | mixed convection | Wind Tunnel Experiments | ventilative cooling

The outdoor climate is changing and the airtightness and insulation levels of residential buildings are improving.

Nearly zero energy house | balanced ventilation | overheating reduction | postcooling

In school and office buildings, the ventilation system has a large contribution to the total energy use.

All-air Ventilation | MPC | energy saving | predictive control | educational building

Mixed-mode ventilation uses intelligent switching between natural and (partly) mechanical ventilation modes to find the best possible balance between indoor air quality, user comfort and energy con

mixed-mode ventilation | Airflow network | indoor air quality | user behaviour | building simulations

The ventilative cooling by natural ventilation is important technology for the buildings in urban area for the sake of energy saving and BCP (Business Continuity Plan).

wind tunnel test | LES | critical Reynolds Number | wind pressure coefficient | wind velocity around buildings

The last decades big steps have been made on the road to develop and design energy neutral buildings.

Fan energy | low pressure ventilation systems | non-residential buildings | system design | low pressure components

Low energy buildings are highly insulated and airtight and therefore subject to overheating risks, where Ventilative cooling (VC) might be a relevant solution.

ventilative cooling | standards | legislation | compliance tools | recommendations

The current development in building energy efficiency towards nearly-zero energy buildings (nZEB) represents a number of new challenges to design and construction.

ventilative cooling | lessons learned | barriers

Advancing energy efficient renovation solutions in buildings necessitate adopting high-insulation and airtightness to avoid heat loss through transmission and infiltration, which can result in over

overheating | energy renovation | residential ventilation | apartment building | energy consumption

The interest in phase change materials (PCMs) as a solution for thermal energy storage has been growing for the last decades.

Phase change material (PCM) | night ventilation | Free cooling | building simulation | box in the box concept

Controlled Natural Ventilation (CNV) is one of the potential most effective passive cooling technique to reduce cooling needs of buildings in temperate-hot climate zones.

ventilative cooling | simulation | thermal insulation | internal heat capacity

Occupants control indoor environments to meet their individual needs for comfort.

occupant behaviour | indoor air quality | Window manual control | Machine learning | Energy Simulation

Balanced ventilation units are well known to provide a sufficient amount of fresh air in residential buildings in a controlled way, without relying on ever-changing naturally driven forces.

residential ventilation | heat recovery | ventilative cooling | cold recovery | monitoring

Earlier field measurements in Low Energy Buildings have shown that excess temperatures can easily occur during summertime in well-insulated houses, also in northern part of Europe.

Free cooling | Borehole | heat pump | bidirectional ventilation | NZEB

This paper will present the context and application of earth tube systems for the provision of ventilative cooling and general make-up air in the heating, ventilation and air conditioning (HVAC) se

Green retrofit | Earth tube system | Potential cooling and enhanced indoor air quality | Health and wellbeing

Recent studies have shown that ventilative cooling reduces overheating, improves summer comfort and decreases cooling loads.

ventilative cooling | Summer comfort | energy efficiency | field measurement | ventilation

The test lecture rooms of KU Leuven Ghent Technology Campus are one the demonstration cases of IEA EBC Annex 62: Ventilative Cooling.

ventilative cooling | NZEB | school building | measurements | thermal comfort

Ventilative cooling (VC) is an application (distribution in time and space) of air flow rates to reduce cooling loads in spaces using outside air driven by natural, mechanical or hybrid ventilation

ventilative cooling | natural ventilation | dynamic simulation | validation

Even in Northern European climates, overheating in many Nearly Zero Energy Buildings is a barrier to year round occupant satisfaction with the indoor thermal environment.

cooling potential | thermal mass | single-sided ventilation

Ventilative cooling (VC) is an application (distribution in time and space) of air flow rates to reduce cooling loads in spaces using outside air driven by natural, mechanical or hybrid ventilation

ventilative cooling | standards | legislation | compliance tools | recommendations

Over the course of the four-year research project of the IEA EBC Annex 62, Ventilative Cooling (VC) has been proven a robust and highly energy efficient solution to support summer comfort in both r

Ventilative Cooling implementation | Ventilative Cooling performance indicators | Ventilative Cooling challenges

Based on 3 short time performance measurements, 4 visits together with user-interviews, 3 involvements in Ventilative Cooling (VC)-building-design, 2 long-term case studies and 11 expert interviews

Ventilative Cooling performance indicators | Ventilative Cooling challenges

We present preliminary results from an examination of the capture and venting of a buoyant plume by a chimney.

Cooking smoke plumes | indoor air quality | Ventilating cooking fumes

Indoor air quality and thermal comfort was measured in 14 three-bedroom, semi-detached, cavity wall naturally-ventilated homes during the winter following an energy efficient retrofit.

indoor air quality | retrofit | occupant behaviour | thermal comfort

The current type of construction preferred for new high energy efficient buildings in Germany, featuring highly insulated building components and an almost completely airtight building shell, raise

ventilative cooling | night ventilation | summer overheating risk | summer heat protection | Thermal building simulation

Ventilative cooling through window airing presents a promising potential for low energy houses in order to avoid overheating risks and to reduce energy consumption of air conditioners.

ventilative cooling | Active House | design stage | passive cooling | natural ventilation

Major and deep energy renovations of single-family houses (more than 60% of the building stock) are expected in Europe over the next several years (Psomas et al., 2016a).

overheating | residential building | passive cooling | adaptive comfort | indoor air quality.

Overheating in domestic homes, specifically in built up urban areas, has become a pressing problem throughout the UK.

overheating | Night-time ventilation | Internal Blinds | External Blinds | Shading.

In recent years, concerns about global warming and greenhouse gas emissions have motivated designers to reduce building energy consumption through the implementation of passive solutions without co

Full-scale bulk airflow measurement | tracer gas technique | large naturally ventilated atrium

Overheating is an unwanted consequence of modern building designs and internal gains that will be aggravated by the effects of climate change on local climates within urban and suburban areas.

natural ventilation | ventilative cooling | case studies | thermal simulation

Most natural ventilation (NV) systems used in non-residential buildings are single sided (SS).

natural ventilation | Single-sided | ventilation effectiveness

The lack of indicators assessing ventilative cooling effectiveness in a way to compare it with active cooling technics, makes its acceptance more difficult.

ventilative cooling | Performance indicators | passive cooling | IEA Annex 62

We introduce a new method for defining ventilative cooling potential (VCP) for office buildings that depends not only on the climatic conditions but also on building thermal characteristics.

building design | ventilative cooling | Balance temperature difference | cooling potential

Thermal comfort is an important aspect of the building design and indoor climate control as modern man spends most of the day indoors.

thermal comfort | indoor climate control | dynamic modelling | model-based control

Flow interaction between thermal plumes and vertical air distribution and the resulting airflow structures were investigated under increasing heat load conditions.

thermal environment | buoyancy flows | convection flow | Airflow Structure | flow interaction | Fourier analysis

According to the 2016 Household Projections report, England’s housing stock could reach 28 million households by 2039 with approximately one fifth being new constructions.

overheating | simulations | Inter-model Comparison | sensitivity analysis | thermal comfort

The Royal Wanganui Opera House (RWOH), in Whanganui, New Zealand, was constructed in 1899, and now seats 830 people.

natural ventilation | passive | CFD | simulation

In the present paper the impact of natural cross-ventilation on thermal comfort levels in sustainable residential buildings is evaluated.

natural ventilation | thermal comfort | Computational fluid dynamics (CFD) | building simulation | Complex building geometry

It has already been proven that a large portion of the energy consumption gap between simulations and reality is due to the occupant behaviour in buildings.

ventilation systems | occupant behaviour | indoor air quality | Energy-efficient buildings | simulation

Where residential developments rely on opening windows to control overheating, there can be a compromise between allowing excessive noise ingress with windows open, or excessive temperatures with w

noise | overheating | passive | ventilation

This study presents a comparison of three ventilation systems; automated Natural Ventilation (NV), balanced Mechanical Ventilation (MV) with heat recovery and Hybrid Ventilation (HV) with heat reco

hybrid ventilation | natural ventilation | mechanical ventilation | ventilation in offices | Indoor Air Quality (IAQ)

More than 64 million pupils spend more time in school than in any other place except home in Europe (European Commission, 2014).

hybrid ventilation | natural ventilation | mechanical ventilation | ventilation in schools | Indoor Air Quality (IAQ)

Urban warming, commonly referred to as the ‘Urban Heat Island’ phenomenon (UHI), is a well-established effect that affects cities all over the world.

cool materials | Urban Heat Island effect | cooling ventilation | Building ventilation

CFD simulations were conducted to assess turbulent forced convection heat transfer and pressure drop through a ventilation channel using a stack of panels with different ridge configurations contai

PCM-Air heat exchanger | numerical simulation | Rib shape | Heat transfer enhancement/augmentation | ventilative cooling

The aim was to study how the cooling jet from the ceiling, with individual control over the airflow, is perceived and how it affects the thermal comfort in warm office environment.

individual control | symptoms | perception | Perceived indoor air quality | air velocity

Shopping centres currently design has included a small portion of automated windows sized for smoke ventilation.

mixed-mode strategy | electricity consumption reduction | shopping mall | common area retrofit | ventilative cooling

Night ventilation is used extensively as a low energy strategy to cool buildings in climates where night temperatures are suitable.

supermarket | energy use | HVAC | night ventilation | EnergyPlus | Frozen food | Environmental and Energy monitoring

With the goal of increasing building flexibility and reducing energy use, yet ensuring IAQ, the feasibility of natural ventilation in a building in Oslo is studied.

natural ventilation | full scale experiment | thermal discomfort

New buildings have to satisfy stricter standards regarding energy efficiency and consumption. This results in higher insulation levels and lower air leakages that reduce heating demands.

ventilative cooling | energy saving | simulations IDA ICE | motorized window opening

Nearly all retail locations use mechanical cooling systems to ensure indoor comfort temperatures and mechanical ventilation to ensure adequate air exchange, primarily for hygienic reasons.

ventilative cooling | shopping centres | commissioning | natural ventilation | control strategy

Increasing use of air-conditioning in India is applying upward pressure on energy demand and may have implications on dependability.

ventilative cooling | field measurements | simulation | natural ventilation | mechanical ventilation

It is estimated that HVAC systems represent the highest energy consumption (approximately half of the total energy consumed) and one of the highest cost, especially in non-residential buildings.

Adaptive thermal comfort | energy efficiency | HVAC system

The use of open-source CFD has been growing in both industry and academia.

computational fluid dynamics | OpenFOAM | Indoor air flow | thermal manikin | turbulence models

This paper proposes a dedicated outdoor air system (DOAS) with thermoelectric module radiant cooling panels (TEM-RCP).

Dedicated Outdoor Air System | radiant cooling | cooled ceiling | thermoelectric modules

Recent studies examined a liquid desiccant indirect and direct evaporative cooling assisted 100% outdoor air system (LD-IDECOAS) as an energy conserving alternative to conventional air conditioning

Liquid desiccant and evaporative cooling-assisted 100% outdoor air system (LD-IDECOAS) | thermal comfort | PMV | Energy Simulation

Natural ventilation (NV) is an efficient way of cooling buildings, and its energy saving potentials however depend on many parameters including local hourly weather and climate conditions, types of

Natural ventilation potentials | building energy savings | GIS maps | Evaluation

This paper presents a ventilated solar collector with energy storage of fins containing Phase Change Material (PCM) in the air cavity and investigates its thermal performance.

low-energy building | ventilated solar collector | phase change material | heating and cooling unit

Heatwaves are often responsible for many deaths due to high temperature indoors. Energy savings is a key element in building design and refurbishment works to reduce the impact of climate change.

thermal comfort | heat stress | natural ventilative cooling | health | climate change

Demand controlled ventilation (DCV) refers to a ventilation system with air flow rates that are controlled based on a measurement of an indoor air quality (IAQ) and/or thermal comfort parameter.

demand controlled ventilation | energy savings | IAQ | ventilation efficiency | office and school buildings

The increasing number of highly insulated and air tight buildings leads to the concern of indoor environment overheating.

Diffuse ceiling ventilation uses perforations in the suspended ceiling to deliver air into the occupied zone.

Ceilings | ventilation | computational fluid dynamics | Porous materials | Numerical models | air | geometry | temperature

The scientific literature offers a number of methods for assessing the likelihood of overheating in buildings.

Ventilation’s historical goal has been to ensure sufficient air change rates in buildings from a hygienic point of view.

ventilation | indoor air quality | measurements | performance | low energy homes

It is well known, that energy consumed by the HVAC systems in buildings represents an important part of the global energy consumed in Europe (Directive 2010/31/EU).

The aim of this study is to analyse the behaviour of natural ventilation techniques in low-rise commercial buildings in terms of Indoor Air Quality (IAQ).

natural ventilation | indoor air quality | CFD | energy savings | thermodynamic modeling

Nowadays, important efforts are deployed to reduce energy consumption in the field of residential buildings.

Simple exhaust mechanical ventilation | heat recovery | heat pump | experimental tests | building simulation

Controlling indoor humidity is important in homes, because high indoor humidity is associated with occupant health and building durability issues.

humidity | ventilation | IAQ | homes | hot-humid climates | high performance homes | smart ventilation | controls

In determining ventilation rates, it is often necessary to combine naturally-driven ventilation, such as infiltration, with mechanical systems.

Unbalanced ventilation | infiltration | REGCAP simulation | empirical models | superposition

The effect of Phase Change Materials (PCMs) to optimize indoor thermal comfort conditions and reduce cooling energy requirement when included in envelope components and materials is demonstrated by

PCM | Cool roof

The framework in which the SINHOR project takes place is the "Service Contract R + D + i Relating to Competence Scope of the Ministry of Public Works and Housing" with the research project entitled

SINHOR project

For zero and low energy buildings, high-energy efficiency ventilation is very often confused with a complex mechanical ventilation system with heat recovery.

natural ventilation | ventilative cooling | demand-controlled ventilation | passive cooling

In response to the European Energy Performance Buildings Directive 2010/31/EU and the Energy Efficiency Directive 2012/27/EU, buildings have increasingly become more insulated in order to reduce th

overheating | Passive House | Thermal comfort assessment.

Because of the customer need of best possible comfort condition and satisfaction, shopping centers are conditioned by means of basic HVAC systems, often without considering the potential of natural

Ventilative cooling feasibility | Shopping center | cooling energy savings | Climate potential

New buildings have to satisfy ever-tightening standards regarding energy efficiency and consumption. This results in higher insulation levels and lower air leakages that reduce heating demands.

ventilative cooling | energy saving | simulations IDA ICE | motorized window opening

The purpose of this paper is to enhance the importance of ventilation regarding energy use and stablishing methods in order to obtain as much data as possible about the behavior patterns of ventila

Energy performance certificate | multizone ventilation model | ventilation | infiltration | air change rate n50

Using solar heat energy has been paid attention to as effective natural energy use.

Air-based solar heat system | experiment | Heat balance | heat storage

Open joint ventilated façade (OJVF) is a passive constructive system widely used to ameliorate envelop of buildings, improving their energy efficiency.

ventilated facade | natural convection | Stereo-PIV.

Typical heat sources in indoor environments include humans, electrical devices, and computers.

heat transfer | radiation modeling | operating room | contaminant (particle) distribution | Computational fluid dynamics (CFD) | numerical simulation

Lecture rooms with their high, quickly fluctuating internal gains, e.g.

NZEB | case study | building monitoring system | air flow measurement

Aim of this work has been to determine the effectiveness of evaporative cooling and ventilation control strategies on a case study to ensure an adequate combination between energy efficiency and hi

natural ventilation | thermal comfort | passive cooling | evaporative cooling | Building automation

Natural ventilation is increasingly considered one of the most efficient passive solutions to improve thermal comfort in buildings.

natural ventilation | thermal comfort | passive cooling | Multizone airflow models | Building automation

This work presents the thermal behavior of a stand-alone experimental solar chimney during one year. The dimensions of the solar chimney are 5.60 m high, 1.0 m width, and 0.52 m depth.

natural ventilation | solar chimney

An advanced heat and electricity saving strategy for the regulation of hybrid ventilation systems with automatic night cooling (ventilative cooling), mechanical compressor cooling, natural ventilat

ventilative cooling | model predictive control MPC | natural ventilation

According to the International Energy Agency, buildings represent over one-third of total final energy consumption.

thermal comfort | indoor air quality | Passivhaus | modelling

In recent years, as an alternative to continuous control with the use of standard analog automation signals (voltage or current), the Pulse Width Modulation (PWM) control was introduced.

electrothermal actuators | PWM-control

Comfort and energy saving are two important concepts treated in current buildings in order to maintain a good air quality reducing the energy consumption.

comfort | energy efficiency | ventilation | Adaptative thermal comfort

Thermal comfort improvement at the lowest energy consumption is a key issue when dealing with sustainability in buildings. An appropriate passive design is mandatory under those circumstances.

sustainability | comfort sensation | experimental monitoring | Fanger method

The most representative typology of residential buildings of Catalonia has been simulated in TRNSYS to evaluate the impact of both infiltration and natural ventilation.

natural ventilation | infiltration | control strategy | thermal comfort | overheating

The transformation of the building energy sector to a highly efficient, clean, decentralised and intelligent system requires innovative technologies like microscale trigeneration and thermally acti

Adsorption cooling | Experimental investigation | Grid Integration | Microscale Trigeneration | predictive control | Thermal Comfort in Buildings

Conventional Displacement Ventilation (DV) system has been installed in an office of a Zero Energy Building (ZEB).

Enhanced displacement ventilation | Tropics | thermal sensation | air movement | questionnaire

The paper presents a numerical methodology to assess the natural ventilation. UrbaWind is an automatic computational fluid dynamics code. It was developed to model the wind in urban environments.

natural ventilation | wind | air change rate | pressure coefficient | Numerical simulations

As an alternative to adopting active architectural systems (mechanical systems) and taking advantage of the resources provided by nature, natural ventilation contributes interesting solutions to co

ventilation | building retrofitting | IAQ | ventilation efficiency | pressurization test

This paper describes Post Occupancy Evaluation survey and physical measurements of five families living for one year or longer in five houses located in Germany, Austria, France and UK, all part of

daylight | thermal comfort | indoor air quality | dwellings | Post Occupancy Evaluation

Supermarkets are a category of non-domestic buildings with high energy use because of their operation.

supermarket | energy use | HVAC | night ventilation | EnergyPlus

This paper presents two case studies of stack driven ventilative cooling systems implemented in kindergarten schools located in the mild Subtropical-Mediterranean climate of Lisbon, Portugal.

Ventilative cooling systems | natural ventilation | thermal chimney | EnergyPlus | dynamic thermal simulation

Night sky radiative cooling technology using PhotoVoltaic/Thermal panels (PVT) and night time ventilation have been studied both by means of simulations and experiments to evaluate their potential

night time ventilation | Night Sky Radiative Cooling | Phase change materials | thermal comfort | renovation

The new initiatives and regulations towards nearly zero energy buildings forces designers to exploit the cooling potential of the climate to reduce the overheating occurrence and to improve thermal

Ventilative cooling potential | climate analysis | early design stages | overheating | airflow rates

Ventilative cooling (VC) is a way to cool or to prevent overheating in a building by means of ventilation rates higher than hygienic ventilation rates.

ventilative cooling | energy performance regulations | venticool | IEA Annex 62

The term of “Active House” recently developed, addressing houses that target a balanced optimization of indoor environmental quality, energy performance and environmental performance.

Active Houses | Indoor environmental control | daylight | hybrid ventilation

In both, newly built and renovated buildings the building air-tightness has to be ensured. With a tight building envelope comes a low infiltration air-exchange.

hygrothermal building simulation | air-flow-model | WUFI® Plus | natural ventilation

Zero Energy Buildings require airtightness and mechanical ventilation systems to provide air changes and energy saving. These requirements contrast with the principles of natural ventilation.

Integrated design | hybrid ventilation system | zero energy building | Adaptive thermal comfort | temperate climate

Higher insulation and air tightness levels of buildings, increase the risk on overheating. Ventilative cooling as passive technique can limit overheating and decrease cooling energy consumption.

Energy performance regulation | overheating | sensitivity analysis | ventilative cooling

Passive cooling by night ventilation is one of the most promising approaches to reduce cooling energy demand of office buildings in moderate climates.

night ventilation | Integrated design | simulation | energy demand

The framework of the research presented in the paper is a project oriented to promote the use of concrete solutions in buildings based on maximizing the benefits of its thermal inertia for cooling

Cooling savings | ventilated active façade | Cooling storage

As the benefit of natural ventilation in reducing operational cost is well recognised, the concept of natural ventilation is becoming more received by residents and designers alike.

natural ventilation | Building Information Modeling | computational fluid dynamics

Nearly all retail locations use ventilation and cooling systems to ensure adequate air exchange for health reasons and indoor comfort temperatures.

Climate potential | ventilative cooling | retail buildings | refurbishment | dynamic simulations

The Kindergarten Solhuset is built according to the Active House vision with an emphasize of good daylight conditions and fresh air.

thermal comfort | daylight | ventilative cooling | solar shading | kindergartens

The present paper addresses experiences with ventilation and thermal comfort in the Active House concept, based on the Active House Specification and realized Active Houses.

Active House | natural and hybrid ventilation | renovation | standards | controls systems

The thermal comfort of the residential buildings Sunlighthouse in Austria and LichtAktiv Haus in Germany are investigated with a particular focus on the summer situation and the role of solar shadi

Thermal comfort; ventilative cooling; residential buildings; solar shading | Post Occupancy Evaluation

Increasing airtightness and isolation of residential buildings in today’s climates cause challenging situations for the summer indoor climate.

residential ventilation | indoor air quality | ventilative cooling | air-to-air heat pump

The effect of a cooling jet from ceiling on thermal comfort, perception and subjective performance in warm office environment (29.5 °C) was studied.

thermal comfort | cooling jet | perception | symptoms | self-rated performance

This position paper gives a brief overview of opportunities and challenges for ventilative cooling solutions both:

Adopting natural ventilation as a retrofit strategy for cooling, due to the low impact nature of the installation, is attractive due to the cooling potential of untreated outdoor air for large peri

single sided ventilation | dominant forces | warren plot | buoyancy asymptote | fluctuating ventilation rate

The present paper addresses experiences with infiltration and ventilation in the Active House concept, based on the Active House Specification and realized Active Houses.

Night ventilation has been applied successfully to many passively-cooled or low-energy office buildings.

night ventilation | offices | comfort | Building Typology | Climate Zones

Non-invasive, scalable, building retrofit solutions are very attractive deep renovation techniques to improve energy efficiency in existing buildings; this includes natural ventilation for cooling

tracer decay tests | single sided ventilation rate | envelope retro-fit | stratification factor

As a novel air distribution system, diffuse ceiling ventilation combines the suspended acoustic ceiling with ventilation supply.

diffuse ceiling | thermal comfort | indoor air quality | design chart

Owing to the growing concern about indoor air quality (IAQ) globally in hospitals, especially after the recent outbreak of diseases like severe acute respiratory syndrome (SARS), Swine Flu (H1N1) a

natural ventilation | indoor air quality | Mosquito | Harmattan dust | semi-arid

There is a growing consensus that the climate is changing faster than at any time in the past millennium. This is likely to have major effects upon many aspects of the built environment.

Adaptation | climate change | overheating | Micro-climate.

In Japan, wooden detached residential houses are common; the wood components within a wall may undergo decay because of condensation in the wall or flushing defects, which can be a concern.

Double-skin system | detached house | simulation | natural ventilation | Cooling load

The effect of a new passive cooling device to the indoor air is analyzed based both to experimental and simulating results.

roof ponds | Indirect evaporative cooling

Climate change phenomena such as global warming and urban heat island effects cause serious problems for the development of building technology.

climate change | Future Standard Weather Data | building energy simulation | Dynamical Downscaling

Future climate change might have a tremendous impact on energy use, ventilative cooling strategies and thermal comfort in buildings, since these parameters are strongly correlated with the external

climate change | generation of future files | morphing method | Mitigation Strategies | degree days

In a Dutch project the double façade became an integral part of the ventilation concepts aa well as the heating system by trying to optimize the heat gain within the cavity during spring and autumn

Non-invasive, scalable, building retrofit solutions are amongst the most likely large scale adoption techniques to assist in climate change adaptation in the existing built environment, particularl

ventilation rate | single sided ventilation | retro-fit | stack effect | stratification factor | thermal time constant

In recent years, with actualization of a global warming issue, the need for simultaneous pursuit of progress of comfort in living space at residential house and energy saving is now becoming greate

passive design | natural ventilation | cross-ventilation | Taiko-shoji | Thermal storage floor

The thermal comfort of the residential buildings Home for Life in Denmark, LichtAktiv Haus in Germnay and Sunlighthouse in Austria is investigated with a particular focus on the strategies used to

Thermal comfort; ventilative cooling; residential buildings; natural ventilation; solar shading

A lightweight aluminium nocturnal radiator, painted with an appropriate paint, was established on the roof of the Department of Environmental & Natural Resources Management in Agrinio, in Weste

passive cooling | radiative cooling | sky temperature | clear sky emissivity | metallic nocturnal radiator.

Detached residential wooden houses are a common type of housing in Japan. Decay of wooden components within the walls caused by condensation or defective flushing, is sometimes an issue.

Double-skin system | detached house | simulation | forced ventilation | Cooling load

In this article, it will be shown how heat recovery ventilation with closed-loop ground heat exchange performs in practice, in a residential building in Nijeveen, The Netherlands.

residential heat recovery ventilation | ground heat exchange | monitoring | seasonal performance factor | bypass

Maintaining an IAQ with fresh in school building is very important because the good IAQ can keep the student in health and improve the academic performance.

ERV | Outdoor air cooling | energy saving | TRNSYS

A good level of thermal insulation and an adequate thermal capacity of the building envelope are essential to achieve good energy performance.

thermal inertia | thermal comfort | ventilation strategies | dynamic simulation | insulation

Large, multi-storey buildings pose a particular challenge for natural ventilation design due to the interaction between heat and air flows through different building zones.

A characterization and modeling process has been conducted in order to better account for ventilative cooling in the evaluation of energy performance of buildings.

ventilative cooling | thermal simulation | airflow simulation | measurements | characterization of air flow

This work is based on the RESHYVENT project  in which the effectiveness of hybrid (i.e.

air conditioning | Ventilation Natural and Mechanical

Common experiences, standards, and laboratory studies show that increased air velocity helps to offset warm sensation due to high environmental temperatures.

thermal comfort | air velocity | personal control | desk fan

Public residential buildings in Singapore are designed as naturally ventilated.

climate change | public residential buildings | natural ventilation | thermal comfort | Singapore

The climate of Greece is typical Mediterranean with wet, cool winters and hot, dry summers.

single family building | building performance simulation | night ventilation | climate change | Mediterranean – Greece

Night ventilation has been applied successfully to many passively-cooled or low-energy office buildings.

night ventilation | offices | comfort | Building Typology | Climate Zones

Passive cooling in the built environment is now reaching is phase of maturity.  Passive cooling is achieved by the use of techniques for solar and heat control, heat amortization and heat dissipati

passive cooling | heat dissipation | ground cooling | evaporative cooling | ventilative cooling

It still remains heat loss and high risk of moisture condensation occurrence at glass of window because they have relatively poor insulating qualities and usually contribute the greatest heat loss

Air supply type airflow window system | Double-pane window | moisture condensation | CFD

Accuracy in estimation of airflow through windows is the key parameter for modelling and designing of naturally ventilated buildings.

Centre-pivot roof window | Discharge Coefficient | CFD

The paper in hand investigates the potentials and limitations of ventilative cooling strategies in the moderate Central Europe climate region of Vienna, Austria, offering a a basic load break down

ventilative cooling | night flush ventilation | climate sensitive architectural design

The work evaluates the applicability of façade-integrated ventilation systems in a Nordic climate.

facade | integration | ventilation | simulation

Previous studies have demonstrated that in summertime increased air velocities can compensate for higher room temperatures to achieve comfortable conditions.

thermal comfort | air velocity | personal control | desk fan

The present study describes the potential improvement of summer comfort and reduction of energy consumption that can be achieved by adopting passive cooling solutions, such as daytime comfort venti

natural ventilation | ventilative cooling | night cooling | increased indoor air velocity | residential buildings

Thermal comfort is a subjective term, closely related to the sensation of warm or cold for the occupants, defining the state of mind of humans that expresses satisfaction with the surrounding envir

thermal comfort; CFD; turbulence intensity; ventilation strategies

The need for thermal comfort and clean air for occupants in buildings or vehicles is vital since we spend more than 90% of our time inside these enclosed environments.

cross shaped jet | CFD | RANS turbulence models | LES

The new Nicosia Town-hall is a very particular building.

potential for ventilative cooling strategies; design approaches for ventilative cooling and case studies; summer comfort and ventilation; nnovative ventilation

Low energy buildings, being highly insulated, are subject to important overheating risks. Thermal simulation as well as experimental studies have shown the large potential of ventilative cooling.

ventilative cooling | energy performance | Roof Windows | characterization

Natural ventilation and dynamic temperature simulation of buildings was until now a priviledge of highly skilled building physicists. Combined simulation of both is even rarer. 

potential for ventilative cooling strategies | design approaches for ventilative cooling and case studies | ventilative cooling in energy performance regulations | summer comfort and ventilation

The aim of this paper is to investigate the influence of the selective ventilation in the thermal performance of modern naturally-ventilated houses built in the 1950’s and 1960’s in Goiânia, locate

Selective ventilation | thermal performance | naturally-ventilated houses | modern houses

Natural ventilation is increasingly considered a promising solution to improve thermal comfort in buildings, including schools.

natural ventilation | school building | passive cooling | thermal comfort | wind

Despite a lot of Integrated Design Process guidelines and procedures have been developed in the last few years, more specific energy design procedures are needed to push the implementation of passi

Airflow network | uncertainty analysis

This article deals with summer comfort and room air distribution in low-energy housings.

HVAC | air diffusion | Summer comfort | experimentations | CFD

The energy consumption needed for establishing a good indoor climate in shopping centres is often very high due to high internal heat loads from lighting and equipment and from a high people densit

Thermal building simulation | energy savings | natural ventilation | hybrid ventilation | natural cooling | shopping centre | case study | log-data analysis

Hybrid ventilation (HV), as a combination of automated natural ventilation (NV) and balanced mechanical ventilation (MV), provides opportunities to use the advantages of both ventilation systems du

hybrid ventilation | natural ventilation | mechanical ventilation | ventilation in schools | comparison of different ventilation strategies | energy | IAQ

BR10 requires that all new residential constructions should be built as low energy housing.

energy performance | indoor environment | comfort | hybrid ventilation | intelligent controlling

The objective of this study was to develop a method for hourly calculation of the operating temperature in order to evaluate summer comfort in dwellings to help improve building design.

hourly temperature calculation | Summer comfort | simplified method

Sizing rules in residential ventilation standards lack uniformity in both methodology and resulting design flow rates.

optimization | exhaust ventilation | residential | simulation | IAQ

Ensuring a proper indoor environment in the museum exhibition rooms requires, among others, the achievement and maintenance of the proper air change rate.

natural ventilation; museum building; simulation methods; CO2 concentration

The thermal comfort of the residential building Home for Life is investigated with a particular focus on the strategies used to achieve good thermal comfort, and the role of solar shading and natur

thermal comfort | ventilative cooling | residential buildings | natural ventilation | solar shading

The monitoring of a demand controlled heat recovery ventilation system with ground heat exchange in a zero-energy building in Groenlo, The Netherlands, revealed interesting practical insights.

Indoor Air Quality (IAQ) | residential ventilation | heat recovery | ground heat exchange | passive cooling | monitoring | CO2 | recovery efficiency | demand control

Traditional architecture gives ideas to enrich modern architecture. In traditional architecture, local materials and renewable energy resources have been used.

courtyard | hot desert climate | natural ventilation | low-income housing

Ventilative cooling refers to the use of natural or mechanical ventilation strategies to cool indoor spaces.