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Energies 2019, 12(6), 996; https://doi.org/10.3390/en12060996

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

1
Faculty of Architecture, Civil Engineering College, Ningbo University, Fenghua Street 818, Ningbo 315211, China
2
Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT, Osterfelder Strasse 3, 46047 Oberhausen, Germany
*
Author to whom correspondence should be addressed.
Received: 21 January 2019 / Revised: 4 March 2019 / Accepted: 11 March 2019 / Published: 14 March 2019
(This article belongs to the Special Issue Solar Heating and Cooling 2019)
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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 m2, 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. View Full-Text
Keywords: solar cooling; solar heating; heat pump; absorption chiller; evacuated tube collector solar cooling; solar heating; heat pump; absorption chiller; evacuated tube collector
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Huang, L.; Zheng, R.; Piontek, U. Installation and Operation of a Solar Cooling and Heating System Incorporated with Air-Source Heat Pumps. Energies 2019, 12, 996.

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