This study used a mathematical model to explore the accuracy of extrapolating multi-point blower door test results down to lower pressures at which building infiltration usually occurs naturally.
40th AIVC - 8th TightVent - 6th venticool Conference - Ghent, Belgium - 15-16 October 2019
The 40th AIVC Conference "From energy crisis to sustainable indoor climate - 40 years of AIVC", was held in Ghent, Belgium, 15-16 October 2019. Contains 128 papers and/or summaries.
How Accurate is our Leakage Extrapolation? Modeling Building Leakage Using the Darcy-Weisbach Equation | 2019 | English | 13 pp
Vertical Distribution of Temperature and Contaminant Concentration in a Room with Impinging Jet Ventilation System | 2019 | English | 10 pp
The impinging jet ventilation system (hereinafter referred to as IJV) has been proposed as a new air conditioning ventilation system. Properties of indoor environment with this system using impinging jet are complicated.
Analysis of convective heat transfer coefficient correlations for ventilative cooling based on reduced-scale measurements | 2019 | English | 8 pp
Ventilative cooling can be used as a passive cooling measure to reduce the cooling energy demand of buildings. It can be used during the day, directly removing excessive heat gains, or during the night (i.e.
The outdoor climate is changing and the airtightness and insulation levels of residential buildings are improving. During the warmer season this can lead to overheating problems, especially when the house is situated in urban areas.
Modelling thermal comfort and energy consumption of a typical mixed-cooling apartment in Guilin, China | 2019 | English | 7 pp
Many studies have shown that the use of mixed-mode cooling can bring down the cooling load significantly while maintaining satisfactory in door air quality and thermal comfort.
For several years indoor comfort is measured in halls of hospitals by architecture students from the Delft University of Technology.
Prediction of the influence of solar radiation on adaptive thermal comfort using CFD simulation | 2019 | English | 14 pp
Adaptive thermal comfort model has been widely used to evaluate the thermal comfort level of natural ventilation buildings.However, current adaptive standards offer a simple linear relationship between the outdoor temperature and the indoor comfor
Ventilation is critical in interpreting indoor air quality (IAQ), yet few IAQ assessments report ventilation rates; even when they do, the measurement method is often not fully described.
Measuring the ventilation rate in occupied buildings and adapting the CO2 tracer gas technique | 2019 | English | 10 pp
Measuring ventilation rates in occupied dwellings is challenging but represents the conditions that occupants experience.
Airtightness and non-uniformity of ventilation rates in a naturally ventilated building with trickle vents | 2019 | English | 10 pp
Infiltration is an uncontrolled contribution to ventilation in a building and can contribute significantly to the total ventilation rate, particularly in older, leaky, dwellings which can rely on infiltration to provide adequate indoor air quality
Indoor air quality is the chemical, physical and biological properties that indoor air must have to not cause any negative impact on occupants’ health and provide comfort: feel fresh, pleasant and stimulating.
Successive Indoor Air Pressure Calculation Method for Natural Ventilation Rate Prediction | 2019 | English | 10 pp
Installing Natural Ventilation (NV) system in office buildings leads to the reduction of energy consumption of heating, ventilation and air conditioning (HVAC), which accounts for approximately 50% of total in an office building in Japan.
Using CFD simulation to improve estimation of wind pressure coefficient for naturally-ventilated buildings in tropical climate | 2019 | English | 9 pp
Building energy simulation (BES) and Airflow network (AFN) programs generally incorporate wind pressure coefficients (Cp) estimated from secondary sources, namely data bases or analytical models.
Experimental study of the combination of a positive input ventilation and active air vents on the air change rates of a house | 2019 | English | 10 pp
This study aims to experimentally evaluate the influence of the combination of a supply only ventilation, called here positive input ventilation, and innovative active air vents on the Indoor Air Quality of a house.
An investigation of ventilation control strategies for louver windows in different climate zones | 2019 | English | 11 pp
Guaranteeing high indoor air quality and high degree of user satisfaction at the same time is one of the challenges when improving the energy efficiency of a building.
Cooling Performance of Air-Conditioning System with Ceiling Suspended Packaged Air Conditioning Unit over Divided-Type Membrane Ceilings in Large Classroom | 2019 | English | 10 pp
The mainstream of air-conditioning system for medium and small sized buildings is conditionally air mixing ventilation with ceiling cassette unit of packaged air conditioner (PAC), however, it may bring a high cold-draught risk to occupants, due t
Modelling of Supply Air Jet from Diffusers of Four-way packaged Air-conditioner for CFD Analysis on Unsteady | 2019 | English | 10 pp
Recently in Japan, many buildings introduce packaged air-conditioner (hereinafter, this is called “PAC”) as an air conditioning equipment.
Multi-objective design of single room ventilation units with heat and water recovery | 2019 | English | 10 pp
The present paper describes the design improvement of a single-room ventilation unit. This ventilation system presents many advantages, however, several drawbacks exist. The first one is the acoustic disturbance.
Review of building services solution fitted for a low emission building stock in urban areas | 2019 | English | 12 pp
The purpose of this paper is to summarize the status of promising low carbon building services solutions fitted for a low emission building stock in urban areas.
Comparative life-cycle assessment of constant air volume, variable air volume and active climate beam systems for a Swedish office building | 2019 | English | 10 pp
Energy use in buildings has a significant influence on the global energy demand and environmental impacts.