Exploring the critical factors and appropriate polices for reducing energy consumption of China's urban civil building sector

Abstract The embodied and operating energy consumption of the civil building sector accounts for more than 30% of the national consumption. It is of great significance to probe the energy saving potential of the building sector and to explore the critical factors responsible for its energy saving practice, which may greatly benefit carbon emission reduction in the process of urbanization. In this paper, we develop a series of formulations to calculate both embodied and operating energy based on hybrid energy input–output model. Taking 2011–2050 as the study period, we combined the embodied and operating energy and designed six scenarios to comprehensively quantify the impacts of three factors: new building floor areas, energy efficiency standards and its implementation rate on the energy saving potential. Furthermore, sensitivity analysis was conducted to dissect the influence of the corresponding factors. The results show that improved standards and less new building floor areas will be the most effective ways to reduce energy consumption and that the best energy saving practice can save up to 20 billion tons of coal equivalent (tce) during the study period. The focus of policy reforms may be varied according to the times and regions. Energy saving technology development and more emphasis on key areas will reduce building energy consumption significantly in the short term, while household lifestyle changes, as well as improved building energy efficiency, should be given a higher priority in the long run.

[1]  Guoqian Chen,et al.  Embodied energy consumption of building construction engineering: Case study in E-town, Beijing , 2013 .

[2]  Geoffrey J. D. Hewings,et al.  Evaluation on the impacts of the implementation of civil building energy efficiency standards on Chinese economic system and environment , 2009 .

[3]  Nianping Li,et al.  A statistical method to investigate national energy consumption in the residential building sector of China , 2008 .

[4]  B. W. Ang,et al.  Input–output analysis of CO2 emissions embodied in trade: Competitive versus non-competitive imports , 2013 .

[5]  David Pearlmutter,et al.  A life-cycle energy analysis of building materials in the Negev desert , 2008 .

[6]  Jaume Freire-González,et al.  Methods to empirically estimate direct and indirect rebound effect of energy-saving technological changes in households , 2011 .

[7]  X Chen.  TOTAL SYNTHETIC ANALYSIS OF ENERGY INPUT , 1981 .

[8]  Jing Zhao,et al.  Implementing effect of energy efficiency supervision system for government office buildings and large-scale public buildings in China , 2009 .

[9]  Anne Grete Hestnes,et al.  Energy use in the life cycle of conventional and low-energy buildings: A review article , 2007 .

[10]  Jiang Yi.  Study on Statistical Method for Building Energy Consumption , 2007 .

[11]  Agnieszka Zalejska-Jonsson,et al.  Evaluation of low-energy and conventional residential buildings from occupants' perspective , 2012 .

[12]  Qiu Baoxin.  Six Field With Highest Potential of Building Energy Saving and Their Perspectives in China , 2010 .

[13]  Baizhan Li,et al.  Energy efficiency supervision strategy selection of Chinese large-scale public buildings , 2009 .

[14]  H. K. Yu,et al.  Environmental impacts of building materials and building services components for commercial buildings in Hong Kong , 2007 .

[15]  Wenjun Zhou,et al.  A study of energy efficiency in residential buildings in Knoxville, Tennessee , 2014 .

[16]  Khairul Salleh Mohamed Sahari,et al.  Energy savings by smart utilization of mechanical and natural ventilation for hybrid residential building model in passive climate , 2013 .

[17]  Ravi Prakash,et al.  Life cycle energy analysis of buildings: An overview , 2010 .

[18]  Robert Ries,et al.  The embodied energy and environmental emissions of construction projects in China: An economic input–output LCA model , 2010 .

[19]  Qingyuan Zhang,et al.  Residential energy consumption in China and its comparison with Japan, Canada, and USA , 2004 .

[20]  Baizhan Li,et al.  Urbanisation and its impact on building energy consumption and efficiency in China , 2009 .

[21]  Wu Yong,et al.  Energy-efficiency supervision systems for energy management in large public buildings: Necessary choice for China , 2009 .

[22]  R. Ries,et al.  The quantification of the embodied impacts of construction projects on energy, environment, and society based on I-O LCA , 2011 .

[23]  D. B. Diamond,et al.  Income and Residential Location: Muth Revisited , 1980 .

[24]  B. W. Ang,et al.  Input–output analysis of CO2 emissions embodied in trade: The effects of spatial aggregation , 2010 .

[25]  Luyi Xu,et al.  Building energy saving potential in Hot Summer and Cold Winter (HSCW) Zone, China—Influence of building energy efficiency standards and implications , 2013 .

[26]  W. Cai,et al.  China building energy consumption: Situation, challenges and corresponding measures , 2009 .

[27]  Sai Liang,et al.  An improved input–output model for energy analysis: A case study of Suzhou , 2010 .

[28]  Jyotirmay Mathur,et al.  Potential of energy savings through implementation of Energy Conservation Building Code in Jaipur city, India , 2013 .

[29]  Yong Wu,et al.  A review of building energy efficiency in China during “Eleventh Five-Year Plan” period , 2012 .

[30]  D. Huntzinger,et al.  A life-cycle assessment of Portland cement manufacturing: comparing the traditional process with alternative technologies , 2009 .

[31]  J. Burnett,et al.  Analysis of embodied energy use in the residential building of Hong Kong , 2001 .

[32]  Hongping Yuan,et al.  Contribution of promoting the green residence assessment scheme to energy saving , 2012 .

[33]  Son H. Kim,et al.  China's building energy demand: Long-term implications from a detailed assessment , 2012 .

[34]  Brian Norton,et al.  Life-cycle operational and embodied energy for a generic single-storey office building in the UK , 2002 .

[35]  Zheng Li,et al.  A simplified method to estimate the energy-saving potentials of frequent construction and demolition process in China , 2013 .

[36]  David Chow,et al.  The effectiveness of retrofitting existing public buildings in face of future climate change in the hot summer cold winter region of China , 2013 .