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Installation and Operation of a Solar Cooling and Heating System Incorporated with Air-Source Heat Pumps

Author

Listed:
  • Li Huang

    (Faculty of Architecture, Civil Engineering College, Ningbo University, Fenghua Street 818, Ningbo 315211, China)

  • Rongyue Zheng

    (Faculty of Architecture, Civil Engineering College, Ningbo University, Fenghua Street 818, Ningbo 315211, China)

  • Udo Piontek

    (Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT, Osterfelder Strasse 3, 46047 Oberhausen, Germany)

Abstract

A solar cooling and heating system incorporated with two air-source heat pumps was installed in Ningbo City, China and has been operating since 2018. It is composed of 40 evacuated tube modules with a total aperture area of 120 m 2 , a single-stage and LiBr–water-based absorption chiller with a cooling capacity of 35 kW, a cooling tower, a hot water storage tank, a buffer tank, and two air-source heat pumps, each with a rated cooling capacity of 23.8 kW and heating capacity of 33 kW as the auxiliary system. This paper presents the operational results and performance evaluation of the system during the summer cooling and winter heatingperiod, as well as on a typical summer day in 2018. It was found that the collector field yield and cooling energy yield increased by more than 40% when the solar cooling and heating system is incorporated with heat pumps. The annual average collector efficiency was 44% for cooling and 42% for heating, and the average coefficient of performance (COP) of the absorption chiller ranged between 0.68 and 0.76. The annual average solar fraction reached 56.6% for cooling and 62.5% for heating respectively. The yearly electricity savings accounted for 41.1% of the total electricity consumption for building cooling and heating.

Suggested Citation

  • Li Huang & Rongyue Zheng & Udo Piontek, 2019. "Installation and Operation of a Solar Cooling and Heating System Incorporated with Air-Source Heat Pumps," Energies, MDPI, vol. 12(6), pages 1-17, March.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:6:p:996-:d:213911
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    References listed on IDEAS

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    3. Pongtornkulpanich, A. & Thepa, S. & Amornkitbamrung, M. & Butcher, C., 2008. "Experience with fully operational solar-driven 10-ton LiBr/H2O single-effect absorption cooling system in Thailand," Renewable Energy, Elsevier, vol. 33(5), pages 943-949.
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    Cited by:

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    2. Karol Sztekler & Wojciech Kalawa & Wojciech Nowak & Lukasz Mika & Slawomir Gradziel & Jaroslaw Krzywanski & Ewelina Radomska, 2020. "Experimental Study of Three-Bed Adsorption Chiller with Desalination Function," Energies, MDPI, vol. 13(21), pages 1-13, November.
    3. Jingnan Liu & Lixin Zhang & Yongbao Chen & Zheng Yin & Yan Shen & Yuedong Sun, 2022. "Study of the Technologies for Freeze Protection of Cooling Towers in the Solar System," Energies, MDPI, vol. 15(24), pages 1-11, December.
    4. Karol Sztekler & Wojciech Kalawa & Lukasz Mika & Jaroslaw Krzywanski & Karolina Grabowska & Marcin Sosnowski & Wojciech Nowak & Tomasz Siwek & Artur Bieniek, 2020. "Modeling of a Combined Cycle Gas Turbine Integrated with an Adsorption Chiller," Energies, MDPI, vol. 13(3), pages 1-12, January.
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