Journal of Shanghai Jiao Tong University ›› 2023, Vol. 57 ›› Issue (7): 910-920.doi: 10.16183/j.cnki.jsjtu.2022.005

Special Issue: 《上海交通大学学报》2023年“新型电力系统与综合能源”专题

• New Type Power System and the Integrated Energy • Previous Articles     Next Articles

Performance of Solar Vacuum Tube Water Heater-Air Source Heat Pump System in Cold Area

LI Jinping1,2,3(), DONG Yuhui1,2,3, LI Caijun1,2,3, DAI Jingbo1,2,3, NIU Yinan1,2,3, NOVAKOVIC Vojislav4   

  1. 1. Gansu Key Laboratory of Complementary Energy System of Biomass and Solar Energy, Lanzhou University of Technology, Lanzhou 730050, China
    2. School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
    3. Collaborative Innovation Center for Supporting Technology of Northwest Low-Carbon Towns, Lanzhou University of Technology, Lanzhou 730050, China
    4. Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway
  • Received:2022-01-05 Revised:2022-03-21 Accepted:2022-05-05 Online:2023-07-28 Published:2023-07-28

Abstract:

To improve the stability of solar heating and reduce the high cost of air source heat pump heating, the idea of air source heat pump assisted solar stable heating was proposed. A solar vacuum tube water heater-air source heat pump system was developed and bulit in Weiling Township, Qilihe District, Lanzhou, Gansu Province. The performance of the system was compared to analyze the heat collection efficiency, heat pump coefficient of performance (COP), solar energy guarantee rate, and energy efficiency ratio under sunny, overcast, and cloudy conditions. The results show that the effective heat obtained by solar energy under sunny, overcast, and cloudy conditions is 75.5 kW·h, 4.1 kW·h, and 49.2 kW·h respectively, the system heat collection efficiency is 61.3%, 26.6%, and 55.2%, the average coefficient of performance(COP) of the solar heat pump is 3.6, 3.4, and 3.6, the average COP of the air source heat pump is 0, 2.9, and 3.1, the actual heat supply of the system is 113.4 kW·h, 125.9 kW·h, and 124.8 kW·h, the system power consumption is 33.4 kW·h, 50.5 kW·h, and 42.7 kW·h, the system solar energy guarantee rate is 66.6%, 3.3%, and 39.4%, and the system energy efficiency ratio is 3.4, 2.5, and 2.9 respectively. The research results prove that the solar vacuum tube collector-air source heat pump system is feasible for heating and provide a new way for heating in cold areas.

Key words: solar vacuum tube water heater, air source heat pump, heat collection efficiency, coefficient of performance (COP), solar fraction, system energy efficiency ratio

CLC Number: