Simulation Analysis on the Influence of External Wall Thermal Parameters to the Air-Conditioning Load of Buildings with Internal Heat Sources

As one of the key factors to maintain a stable indoor thermal environment, building envelope has a very important impact to the air-conditioning load and energy consumption. The thermal process of buildings with steady internal heat source is quite different from that of ordinary civil buildings. The envelope heat transfer progress of such buildings has been analyzed by means of qualitative analysis and theoretical derivation in this paper. An independent equipment room in Hefei area was taken as a referenced to analyzed the relationship between air-conditioning load and external thermal parameters under different indoor heat dissipation conditions with the software DeST. According to the simulation results, the exterior wall thermal parameters are obviously different when the design load and the accumulated load reach the minimum value. When the heat transfer coefficient is small and the thermal inertia index is large, the design load gets the minimum value. It is just the opposite when the cumulative load is minimized. Based on simulation data, the relationship between cumulative load and equipment heat dissipation and exterior wall thermal parameters was obtained. It has certain guiding significance for thermal engineering design of exterior wall of air-conditioning building with strong internal heat source.