The Study On Saving Energy Envelop In Improving Hot And Humid Environment Of Village Residences In Chongqing

In the past twenty years, With the process of chinese rural reform ,opening up and the implementation of agricultural incentives,the rural economy and living standards have been improved markly . village socio-economic and technological development is accelerating, living standards of rural residents are also increasingly high requirements. However, according to the data shows that: the residential energy consumption accounts for 60% of villages and towns total energy consumption, and almost none of the energy of the relevant standards related to this area. Therefore, how to reduce energy consumption of residential buildings in towns and villages is urgent problem in front of us. If we do not fundamentally solve the problem, the region will be repeated a large number of high-low energy consumption of residential comfort. However, due to economic conditions in the region can not copy from the city limits of various energy conservation measures, must be combined with the resource situation of rural areas, climate and the economic level of thermal performance and then given a good recommendation, economically feasible, construction convenient, environmentally friendly rural energy envelope, take the road of sustainable development.This article relies on supported by Urban and Rural Construction Commission, Chongqing City Construction Projects, firstly a collection of villages and towns in Chongqing typical residential building envelope of existing species been collected. The roof have three types of which are sloping roof, the roof of water storage, flat roof; some kinds of wall are 180(120)thick brick walls, 190 single row of holes hollow concrete brick, rubble walls, etc. red brick and hollow concrete brick wall most widely used; and the glass types are mostly single-colored glass windows, wooden window frames, sometimes aluminum window frames can be seen, the whole of this windows have no shading measures; door mostly solid wood, a few iron door. By thermal calculation found that the best is 180 solid red brick walls, inside and outside the cement mortar, external tiling, and the heat transfer coefficient is 1.531w/m2.k, the thermal inertia index is 3.03. However, the existing rural residential form of enclosure can not reach the relevant energy-saving standards.Through the questionnaire survey found that 89% of the rural residents dissatisfied with the indoor thermal comfort are eager to improve the indoor thermal environment, therefore to strengthen the retaining structure of rural areas is urgent and necessary. By this typical rural house of Chongqing indoor and outdoor housing for continuous monitoring of temperature and humidity throughout the year found that in Chongqing winter is cold but summer is hot, towns and villages housing conditions in the existing envelope of indoor and outdoor relative humidity throughout the year, almost all the above 60%; in natural ventilation for comfortable indoor temperature reaches the temperature range of winter days were only 6 days and 2 days; summer comfort temperature range to reach the number of days 72 days 53 days. So winter indoor thermal environment of residential village is very bad.Finally, combining theory with orthogonal test simulation software DeST-h and the use of adaptive Chongqing building ventilation standards for thermal comfort evaluation, determined the slope of the roof, Sloping roof, 240 Cavity Wall (rice husk filled), rice husk mortar plastering inside and outside the form is a combination of rural areas in the existing program of optimum combination of envelope combinations. Measured the optimal design wall of heat transfer coefficient is 1.326 W/m2.℃, lower than the normal rural residential walls. So it can be promote to use in Chongqing rural areas.