Journal of South China University of Technology(Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (10): 8-15.doi: 10.3969/j.issn.1000-565X.2017.10.002

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Application and Exergy Analysis of Heat Pumps in Co-generation Central Heating System

LI Ya-jun TAN Rong-shuai LIANG Wen-hao   

  1. School of Chemistry and Chemical Engineering∥Key Laboratory of Heat Transfer Enhancement and Energy Conservation of the Ministry of Education，South China University of Technology，Guangzhou 510640，Guangdong，China
  • Received:2016-12-07 Revised:2017-04-09 Online:2017-10-25 Published:2017-09-01
  • Contact: 李亚军(1969-)，女，副教授，主要从事过程系统工程研究． E-mail:liyajun@scut.edu.cn
  • About author:李亚军(1969-)，女，副教授，主要从事过程系统工程研究．
  • Supported by:

    Supported by the National Natural Science Foundation of China(51576070) and the Natural Science Foundation of Guangdong Province(2014A030313224)

PDF

404

Abstract: In order to improve the heating capacity and efficiency of the existing central heating system and thus re- lieve the growing pressure on the heating system in winter,two schemes of adding new heating and adopting heat pumps are designed based on an existing co-generation central heating system.Then,the COP,the exergy efficien- cy and the payback period are used to evaluate the two schemes.The results show that,when the new heating is added,the central heating system achieves a COP of 0. 98,which is almost equal to that of the existing system,and an exergy efficiency of 28. 39%,which is decreased by 39. 15%,as well as a dynamic payback period of 7. 98 years,and that,when the heat pumps are adopted,the COP and the exergy efficiency of the central heating system are respectively 1. 34 and 62. 69%,which are respectively 35. 4% and 34. 36% higher than those of the existing system,and the dynamic payback period is 5. 73 years.In addition,the system adopting the heat pumps is of a good economic adaptability.

Key words: co-generation, central heating system, heat pump, exergy efficiency

CLC Number: