Research On Residential Building Design Strategy Based On The Thermal Stability Theory In Wet-hot And Wet-cold Zone

Thermal stability refers to the buildings under natural running state's ability to maintain indoor temperature relatively stable. Relatively stable means the indoor temperature be controlled in a reasonable and comfortable temperature range, which is defined as comfortable temperature zone. The time of indoor temperature in comfortable tempertature zone is longer, the building thermal stability is better. This paper analyzes the subjective conditions and objective conditions which affect the building thermal stability. Firstly, the climate of wet-hot and wet-cold zone are summarized as the objective condition of this research. Based on the climate background, this paper studied how to improve the thermal ability of residential buildings, to obtain the design strategy in building envelope design, architectural space combination design and residential zone planning. Design builder, which is an energy consumption simulation software, is the tool for testing the thermal stability of buildings in this article.Reseach on the design strategy on building envelope structure includes(1) to simulate outside window heat gains indifferent orientations and prove that the south is the best orientation for outside window,(2) the effects of different SHGC(solar heat gain coefficient) of glasses to building thermal stability, result in the lower value of SHGC of glass can improve the thermal stability,(3) the effects of different outside-shadings to building thermal stability, and the operable outside-shading is the best way to improve thermal stability,(4) the effects of the combination of glasses with different SHGC and outside-shading to building thermal stability, result in the combination of lower value of SHGC of glass and operable out-shading can obtain higher thermal stability,(5) the effects of Ratio of Window to Wall to building thermal stability, and the result is that increase the ratio of window to wall, the thermal stability would decline,(6) the effects of external wall thermal insulation layer thickness to building thermal stability, and prove that lower K value of wall will decline thermal stability, but outside-shading can chage the result that lower K value of wall will increase thermal stability if there is outside-shading on window,(7) the effects of D value of wall to building thermal stability, result in higher value of D of wall would decline thermal stability,(8) the effects of thermal insulation layer position setting to thermal stability, and prove that inside setting of insulation layer on wall would obtain higer thermal stability in natural operation rooms.(9) the effects of different roof forms(slope roof and flat roof) to building thermal stability, and slope roof has better thermal stability than flat roof and the gradient of slope roof is higher, the better of thermal stability is,(10) the effects of soil covered roof and ventilation roof to building thermal stability, both of the two forms would increase thermal stability.In the architectural space combination design level, from the aspects of building insulation, heating, ventilation studying the effects of spatial combination to building thermal stability includes(11)based on the adjacent spaces mutual heating effects simulation, this paper study the the effects of the "heat buffer space" to building summer heat insulation and winter heating, and prove that reasonable design of heat buffer space can improve thermal stability,(12) the effect of ventilation to building thermal stability in summer, and further studying the effects of the number of vents and arrangement of vents to indoor ventilation, and found that two vents is necessary for ventilation in rooms, and there relative distance should be further, and put forward several design strategy of vents setting,(13) analyzing serveral common residential builds' space combination design strategy.In the residential area planning level, this paper studies(14) the effects of different underlying surface to residential area, and suggest that increase vegetation coverage, decline plot ratio of building and building density is an approach to reduce the microclimate environmental temperature,(15) the effect of sunlight to residential zone planning, and obtain a simplified way to estimate the distance for sunlight,(16) the effects of wind to residential zone planning, and study the key point of planning of using wind.