Impact of adaptive thermal comfort criteria on building energy use and cooling equipment size using a multi-objective optimization scheme

摘要

Recently adaptive thermal-comfort criteria have been introduced in the international indoor-climat standards to reduce the heating/cooling energy requirements. In 2008, the Finnish Society of Indoc Air Quality (FiSIAQ) developed the national adaptive thermal-comfort criteria of Finland. The cui rent study evaluates the impact of the Finnish Criteria on energy performance in an office buildinj Two fully mechanically air-conditioned single offices are taken as representative zones. A simulation based optimization scheme (a combination of IDA-ICE 4.0 and a multi-objective genetic-algorithm fror MATLAB-2008a) is employed to determine the minimum primary energy use and the minimum roor cooling-equipment size required for different thermal comfort levels. The applicability of implemeni ing energy-saving measures such as night ventilation, night set-back temperature, day lighting as we as optimal building envelope and optimal HVAC settings are addressed by investigating 24 design vari ables. The results show that, on average, an additional 10 kWh/(m2 a) primary energy demand and a large 10W/m2 room cooling-equipment size are required to improve the thermal comfort from medium (S5 to high-quality (SI) class;higher thermal comfort levels limit the use of night ventilation and wate radiator night-set back options. Compared with the ISO EN 7730-2005 standard, the Finnish criterio could slightly decrease the heating/cooling equipment size. However, it significantly increases both th heating and cooling energy demand;the results show 32.8% increase in the primary energy demand, is concluded that the Finnish criterion-2008 is strict and does not allow for energy-efficient solutions i standard office buildings.