Research On The Correlation Of Residential Building Energy Consumption And Indoor Long-term Thermal Environment

The good design of building envelops in building is an important way to achievethermal comfort and energy efficiency design. In China, the energy consumptionindex which aimed at building with HVAC system in a24-hour continuous operationwas usually being used to evaluate the residential building envelope thermalperformance. However，in the south of China, because of the majority of heating andair conditioning equipments were operated intermittently in residengtial buildings, sothe prediction of energy saving effect is widely divergent from the actual energyconsumption. Meanwhile, when evaluate the building envelops thermal performance,the influences of building envelops on the long-term thermal environment of on-offoperating or non-air-conditioned residential buildings are usually ignored. All of theseshow that the evaluation of building envelopes thermal performance is still notcomprehensive and accurate enough.In the previous studies, Thermal Discomfort Rate (TDCR) has been proposed toevaluate the impact of building envelopes on the long-term thermal environment.Based on these studies, to get a more comprehensive evaluation of building envelopethermal performance, this paper compares the difference between the energyconsumption index and indoor long-term thermal environment index.In this paper, a dormitory building model in Changsha was built, and the ThermalDiscomfort Rate (TDCR) was used to evaluate the indoor long-term thermalenvironment. The influences of envelops on the energy consumption and indoorlong-term thermal environment were analyzed by changing heat-transfer coefficient ofexterior wall, shading coefficient and area ratio of window to wall res pectively, andobtained the sensitivitis of building envelopes for energy consumption and TDCR inGuangzhou, Changsha and Zhengzhou. Results show a clear relationship betweenenergy consumption and TDCR, however the trend and sensitivities of envelopes forenergy consumption and TDCR are various. The research in this paper can be used asa new method to evaluate the building thermal performance and energy efficiencydesign.