Experimental Research on Thermal Performance Differences of Building Envelopes in Multiple Heating Operation Conditions

The thermal performance of building envelopes, including heat insulation performance and dynamic property in multiple heating operation conditions, was concentrated on this paper. The north wall of the experimental building has four kinds of envelope constructions, and thereby marked as the external insulation wall, internal insulation wall, intermediate insulation wall and solid brick wall, the lengths of which are all 650 mm in square. Results shown that the external insulation wall had the highest inner surface temperature and achieved the best indoor thermal comfort in the process of continuous heating, while the internal insulation wall had the fastest inner surface temperature change and obtained the best indoor thermal comfort during intermittent heating condition. Moreover, the closer to indoor low energy storage materials, the better thermal performance and energy efficiency of the envelope construction would achieve.