Optimized Ventilation Control for IAQ in Partial Renovation and Non-Renovated Commercial Buildings during the Summer Period in Chongqing, South West China

This paper reports on research to analyze the indoor air quality (IAQ) and the concentration and varying patterns of CO2, formaldehyde and TVOC in commercial buildings located in Chongqing, South-West China. Two buildings were monitored during the day over two weeks in the summer period. One was a completed building that had been fully operational for several years. This building is termed the ‘non-renovated’ building. The other was a commercial building of similar age that was currently undergoing renovation on one of the main retail floors.

Design impacts of cool roof coating, ventilation and thermal inertia on commercial low-rise building energy demand and summer comfort

Few studies focus on commercial low-rise buildings which are often characterized by low-cost constructions materials and weak energy performances. For these large volumes, the heat transfers with the roof and the ground are prevalent. In this article, we show how the analysis of heat transfers through both the roof and the ground can achieve their thermal performance. The roof design and its opening systems is a key factor of the thermal and lighting performance.

The Design and Development of an Adaptable Modular Sustainable Commercial Building (Co2nserve) for Multiple Applications

Co2nserve is a commercially sponsored project aimed at developing a cost effective modular building that is able to meet sustainability, energy and carbon efficiency needs, and is adaptable to meet a wide range of occupancy applications. Building applications include light industrial production, warehousing, office accommodation, educational needs and health sector requirements. This paper describes the building development and design process. Maximum use is made of passive measures including natural ventilation, daylighting and natural cooling.

Correlation between temperature satisfaction and unsolicited complaint rates in commercial buildings

In this paper the relation between temperature satisfaction ratings and unsolicited complaint rates recorded in a maintenance database is analyzed. That relationship validates a new method of assessing the economic cost of thermal discomfort in commercial buildings.

Long-term monitoring of the performances of an innovative HVAC system for cinemas

In this paper, the results of the elaboration of the experimental data from 1-year longmonitoring of the performances of an innovative HVAC system installed in a multi-roomscinema of the Warner Bros Village near Venice is presented. This system is based on a rooftopexpressly designed for cinemas applications.The behaviour is analysed to verify the machine design choices in terms of reliability,energy efficiency and comfort level achieved. The study confirms the validity of the designwhich characterizes this HVAC system.

Indoor air quality in two different commercial buildings: Part 1: ventilation, temperature, humidity of air and gas concentrations

The main objective of this study was to investigate the Indoor Air Quality (IAQ) in officebuildings and to understand better how HVAC (Heating, Ventilation and Air-conditioning)systems work and what their effects are on IAQ over a sustained period. Two Frenchcommercial buildings were chosen, located in urban areas of Lyon and Paris, and for one daya month, over the course of 1 year, a number of IAQ related variables were recorded bothinside, including the HVAC system, and outside the buildings.

Ventilation modulee. Modulated ventilation.

Modulated ventilation would seem to be an interesting solution, capable of satisfying the demands of air quality in commercial buildings while avoiding thermal losses. The article gives an overview of this type of ventilation system.

Evaluation of night ventilation in a small bakery outlet using the TRNSYS simulation model.

The purpose of this study is to evaluate the use of mechanically driven night ventilation in a small bakery shop by looking at the indoor temperature reduction and energy savings produced by the reduction of the cooling load of air conditioning systems. The results from simulations using a validated model based on the TRNSYS simulation environment demonstrate that night time ventilation can reduce peak daytime temperatures in shops without air conditioning. Where a shop has air conditioning, ventilation at night can reduce the cooling load of the air conditioning system.

Energy consumption and CO2 emission due to HVAC in commercial buildings.

Describes part of a global study on carbon dioxide emission associated with electricity consumption in Belgium. Two commercial buildings were the subject of a simulation. HVAC energy consumption and corresponding CO2 emission were calculated after an identification of the heating and cooling demands. It was found that they are strongly dependant on occupancy rates, and coexist throughout the year.