THE EFFECT OF THERMAL CONDUCTIVITY OF BUILDING WALL MATERIALS AND CLIMATE CONDITIONS ON ENERGY EFFICIENCY OF RESIDENTIAL BUILDINGS

摘要

The effect of thermal conductivity of the wall material and climate conditions on energy-saving efficiency for test houses is studied. The experiment results shown that effect of thermal conductivity of wall materials on energy–saving efficiency is mainly exhibited in cooling and heating electricity consumption of air conditioner for test house, though it is also affected by the different climate conditions. The cooling and heating electricity consumption of air conditioner for test house is increased as thermal conductivity of the wall material is increased when the wall thickness is the same and the wall material is different. The cooling and heating electricity consumption of air conditioner for test house is increased as the temperature difference between the exterior and interior wall-face is increased when the wall materials are the same and the wall construction is different. For example, the energy-saving efficiency of test house with Exterior Thermal Insulation Compound System (ETICs) has been increased up to 50%, compared with the test house without ETICs made by the same building wall materials under the same climate of Guangzhou in Hot Summer and Warm Winter Zone.