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Thermal comfort analysis in a passive house using dynamic simulations

Passive houses are energy efficient constructions that are considered a good way towards a sustainable and non-polluting environment. Their impact on the energy consumption has been discussed numerous times, therefore this article targets the thermal comfort analysis during the summer period. A passive house called SES ECO was used for a detailed computer modeling and numerical analysis. This house was divided into thermal zones with different occupancy scenarios, heat gains and temperature set points. The operative temperature inside these zones was thereafter studied using dynamic simulations using the Bucharest weather data. It was found that by using a ground heat exchanger for fresh air introduction or an increased ventilation rate during night time the overheating was 9% from the total year period or 25% from the entire summer season. Despite the high outdoor temperatures, with values up to 35 o C, the indoor operative temperature was lower than 28 o and only for a small period of time a