Journal of South China University of Technology (Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (10): 16-25.doi: 10.3969/j.issn.1000-565X.2017.10.003

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Optimal Operation Strategy of Parallel-Connection Solar Air-Source Heat-Pump Hot-Water System

ZHOU Xuan1,2LIU Guo-qiang1,2 YAN Jun-wei1,2   

  1. 1.School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.City Air-Conditioning Energy Conservation and Control Project Technology Research Exploitation Center of Guangdong,Guangzhou 510640,Guangdong,China
  • Received:2017-01-13 Revised:2017-06-23 Online:2017-10-25 Published:2017-09-01
  • Contact: 周璇(1976-)，女，博士，副研究员，主要从事建筑节能控制优化研究． E-mail:zhouxuan@scut.edu.cn
  • About author:周璇(1976-)，女，博士，副研究员，主要从事建筑节能控制优化研究．
  • Supported by:
    Supported by the National Natural Science Youth Fund of China(51408233)，the Science Technology Planning Project of Guangdong Province，China(2016B090918105) and the Natural Science Foundation of Guangdong Province(2017A030310162)

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Abstract: At a university in a hot summer and warm winter region,there exist some problems in the parallel-connection solar air-source heat-pump hot-water system at 26 student apartments.For example,the hot water supply is not enough during the abrupt changes of outside meteorological parameters,the solar energy efficiency is low,and the power frequency running of the water pump may cause an energy waste.In this paper,the running mode of the system is divided into the water replenishment mode,the heat storage mode and the water supply mode,and according to the characteristics of different modes,a strategy of streamline management and optimal operation is proposed based on the daily water upper limit control,the hourly water lower limit control,the heating capacity forecast of the solar collector system,the heating capacity forecast of the air-source heat-pump and the water supply at different pressure difference hourly.Then,the proposed strategy and the parameters obtained through experiments are applied to the real-time control of the system.The running results show that the proposed strategy can meet the requirements of the hot water supply,and it achieves a power consumption decrease of 17. 49% and a system COP increase of 19. 98% in 2016 in comparison with those in 2015.

Key words: solar air-source heat-pump hot-water system, parallel connection, hourly heat prediction, hourly water lower limit control

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