Simulation Study on Solar Single/Double-Effect Switching LiBr-H 2 O Absorption Refrigeration System

Qingyang Li, Shiqi Zhao, Dechang Wang (), Qinglu Song (), Sai Zhou, Xiaohe Wang and Yanhui Li
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Qingyang Li: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
Shiqi Zhao: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
Dechang Wang: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
Qinglu Song: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
Sai Zhou: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
Xiaohe Wang: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
Yanhui Li: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China

Energies, 2023, vol. 16, issue 7, 1-19

Abstract: In this study, a solar single/double-effect switching LiBr-H 2 O absorption refrigeration system was investigated to make full use of solar energy and give full play to the advantages of solar refrigeration systems. A corresponding thermodynamic dynamic mathematical model was developed. The operation characteristics of the system operating continuously for one week were analyzed. In order to highlight the advantages of the solar single/double-effect switching absorption refrigeration system, it was compared with other forms of solar refrigeration systems and compression refrigeration systems. The practical application potential of the single/double-effect switching LiBr-H 2 O absorption refrigeration system was evaluated from the perspective of economy and environmental effect. The results showed that the system could achieve the switching operation between single-effect mode and double-effect mode under weather conditions of high solar radiation intensity, and the daily cooling efficiency on such days was relatively high. After an auxiliary heater was added, the primary energy savings of the solar single/double-effect switching LiBr-H 2 O absorption refrigeration system were 25–52%, depending on the area of the collector and the volume of the storage tank. The solar fraction of the system was about 71.99% for continuous operation during the whole refrigeration season. However, the initial investment cost of the system equipment accounted for 89.66% of the total cost. Compared with the traditional compression refrigeration system, the initial investment cost of the solar single/double-effect switching LiBr-H 2 O absorption refrigeration system was higher, but it had a better environmental protection effect.

Keywords: solar energy; single/double-effect absorption refrigeration; operation characteristics; economy; environmental analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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