A Brief introduction to the Design Standard for Energy Efficiency of Residential Buildings In Hot Summer Cold Winter zone

摘要

To design buildings the local climate characters must be taken in to account. The 9.6 million square kilometers territory has been divided into 5 architectural climate regions by the current effective national standard 'Civil building thermal design code'~([1]). These five regions are: severe cold region, cold region, hot summer cold winter region, hot summer warm winter region and mild climate region. The hot summer cold winter region is mainly located at middle and low reaches of Yangtze river with a lager population and a developed economy. The traditional residential buildings are not equipped heating and cooling system, the indoor thermal environment both in summer and in winter are very poor. Since recent years , with the rapid development of economy residents use electrical heater and air conditioner to improve indoor thermal environment. The increasing tendency of building energy consumption is very strong. Because of the poor thermal performance of the traditional residential buildings in this region, a large part of the heating and cooling energy is wasted by the heat loss through walls and windows etc. The energy efficiency is very low. By the end of 1999, The Ministry of Construction launched a program to compile the 'Design Standard for Energy Efficiency of Residential Buildings in Hot Summer Cold Winter Zone'. The purpose of this design standard is to improve indoor thermal environment and to raise the energy efficiency of heating and cooling for residential buildings. In the case of keeping the same room temperature, new residential buildings conforming to the regulation of energy efficiency design standard can save about 50% heating and cooling energy compared with the traditional residential buildings. The residential building construction is booming in this region, the energy saving potential of implementing strictly the energy efficiency design standard is huge.