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thermal comfort

Dynamic performance of displacement ventilation in a lecture hall

An accurate temperature gradient calculation is essential for displacement ventilation (DV) system design, since it directly relates to the calculation of the required supply air flow rate. Inaccurate temperature prediction can cause the poor thermal comfort and w sizing of the ventilation and cooling systems.

Modelling thermal comfort and energy consumption of a typical mixed-cooling apartment in Guilin, China

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. But there is little information available concerning mixed-mode cooling in China. Thus, basing on design parameters of design standard, A series of computer simulation of a typical mixed-cooling apartment in Guilin, lies south-west of China, was conducted by Eneryplus and Climate Consultant software.

Prediction of the influence of solar radiation on adaptive thermal comfort using CFD simulation

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 comfort temperature,ignoring the influence of solar radiation.

Enhancing thermal comfort and indoor air quality in Australian school classrooms

The indoor thermal comfort and air quality in classrooms have become of interest worldwide, predominantly because of their influence on children’s health, learning performance and productivity. Growing concerns with building energy efficiency emphasize the significance of this topic. This paper illustrates the outcome of a field study conducted in secondary school classrooms in Sydney, Australia, during the school year in 2018/2019.

Radiant Heating and Cooling Systems Combined with Displacement Ventilation in Schools; Strategies to Improve IAQ

The new schools in Canada are designed to improve indoor environment quality while achieving a much better energy performance than the code compliance requirements.  

The evaluation of real-time indoor environment parameters measured in 297 Chilean dwellings

People spend the majority of their time in their own homes and so the indoor environmental conditions are an important determinant of population health and wellbeing and have economic consequences. Chile is undergoing rapid economic growth and is managing its national energy demand to minimize its greenhouse gas emissions. Its housing stock is growing rapidly, and is responsible for 15% of national energy demand. Accordingly, there is a need to understand the performance of the stock by measuring parameters that indicate air quality, thermal comfort, and energy demand.

Performances of a demand-controlled mechanical supply ventilation system under real conditions: indoor air quality and power distribution for thermal comfort

This study aims to evaluate the performances of a VMI, a demand-controlled mechanical supply ventilation system, in an experimental house, in terms of indoor air quality (IAQ), energy performance and thermal comfort. The positive input ventilation draws fresh air from the outside, filters and preheats or precools it before blowing it every dry rooms. The air circulates through doors’ undercuts and is naturally extracted thanks to exhaust orifices in every wet rooms. A heat exchanger supplied with water from a reversible heat pump is used to preheat or precool the blown air.

Individualised Dynamic Model-Based Monitoring of Occupant’s Thermal Comfort for Adaptive HVAC Controlling

Thermal comfort and sensation are important aspects of the building design and indoor climate control as modern man spends most of the day indoors. Conventional indoor climate design and control approaches are based on static thermal comfort/sensation models that views the building occupants as passive recipients of their thermal environment. Assuming that people have relatively constant range of biological comfort requirements, and that the indoor environmental variables should be controlled to conform to that constant range.

Impact of an occupancy and activity based window use model on the prediction of the residential energy use and thermal comfort

The opening of windows can lead to high energy losses in wintertime, especially in nearly zero-energy buildings. But can reduce overheating significantly in summertime. Therefore, window use models have been created in the past to assess the energy use and thermal comfort in residential buildings. The models are mostly based on weather-variables. However, a recent study (Verbruggen, Janssens, et al. 2018) indicated that these models were not able to accurately predict the window use in wintertime. For that reason, an occupancy and activity based model was developed.

Thermal comfort, IAQ and Energy use in Bedrooms

The research question of this report is “Is it possible to save energy by lowering the bedroom temperatures in winter”. In this paper first the literature on optimum sleeping temperatures is investigated. Then bedroom temperatures and CO2 levels in a cold week in March 2018 are investigated in 16 bedrooms of students of the Master course Technoledge Climate Desing in 2017-2018 of the faculty of Architecture and the Built Environment of the Delft University of Technology. This study shows that it must be possible to save energy by lowering the bedroom temperature in winter.