Heat-Insulating Property of Mortised Modular Energy-Saving Wall

The mortised modular energy-saving wall is a new heat-insulating system,which can save energy efficiently by holding temperature in the gap between two wallboards.Joint together by mortises and tenons,various inner partition and nonbearing walls can be provided in a modular way.Considered the wall as two-dimension heterogeneity construction enclosure,the average thermal resistance was calculated.Based on the theories of stable heat-transfer of siding,heat-transfer coefficient is discussed,as well as the economical thickness of insulating layer of the new-type wallboard.Calculation and analysis indicated that the heat-transfer coefficient of the new-type wall is 0.689 W/(m2·K) only,far less than that of any other walls.And it means that the new type wall is highly energy-saving.When the polystyrene board thickness is 0.08 m,the wall is most economical with a heat-transfer coefficient down to 0.400 W/(m2·K).