Progress in energy efficiency standards of residential buildings in China’s severe cold and cold zones

Zhenyu Yu,Changping Liu,Xi Chen,Deyu Sun,Wei Xu,Jing Zhang,Fei Lu,S.I Tanabe,I Nastase,H Zhang,C Inard,L Mazzarela,J Kurnitski,P Wargocki,M.C Gameiro Da Silva,G Cao

doi:10.1051/e3sconf/201911103032

Abstract

Since Chinese government released the first residential building energy efficiency standard in 1986, the energy efficiency of residential buildings have been improved significantly. Three editions of residential building energy efficiency standards in severe cold and cold zones have been issued in the past 30 years, meanwhile, a new version is in the course of development and will be released in 2018. The paper reviews energy efficiency standards that have been issued for residential buildings in severe cold and cold zones in China, and development of new energy efficiency standards. The paper also describes the variation of key requirement in standards. Finally, future prospects for further developing energy efficiency standards for residential buildings in China are addressed. The findings show that the energy consumption reduction percentage has raised from 30% of JGJ 26-86 to 65% of the JGJ 26-2010. The insulation performance of roofs and external walls increased respectively by 103% and 83%, and the window performance increased by 130%.

Highlights

For purposes of coping with the climate change and energy saving, building energy efficiency has developed rapidly in the past 50 years
The energy saving rate goal of residential buildings in severe cold and cold areas is 30%, which means that heating energy consumption of new residential buildings should reduce by 30% than the common residential buildings designed in 1980
The energy consumption reduction percentage has raised from 30% of first JGJ 26-86 to 65% of the JGJ 26-2010

Summary

Background

For purposes of coping with the climate change and energy saving, building energy efficiency has developed rapidly in the past 50 years. The JGJ26 “Design standard for energy efficiency of residential buildings in severe cold and cold zones” is very important in China building energy efficiency standard system. The JGJ26 “Design standard for energy efficiency of residential buildings in severe cold and cold zones” has been revised twice and 3 versions have been published The process of this standard can be divided into three phases, which represent the corresponding stages of the building energy efficiency standard system. The energy saving rate goal of residential buildings in severe cold and cold areas is 30%, which means that heating energy consumption of new residential buildings should reduce by 30% than the common residential buildings designed in 1980 This is the minimum requirement of building energy efficiency. This standard made different requirements on shape coefficient and kvalues of building envelopes base on the different number of layers, this is much more easy to use

Development of key indices in energy efficiency standards

Envelopes

HVAC Systems

Findings

Conclusion