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Comprehensive experimental evaluation of an exhaust-heat-driven absorption refrigeration cycle system using NH3-NaSCN as working pair.

Author(s) : ZHOU S., HE G., LI Y., LIANG X., PANG Q., CAI D.

Type of article: IJR article

Summary

Excellent thermal performance and simple construction are the most attractive superiorities of ammonia-salt absorption refrigeration cycles, which is considered to be potentially used in waste heat recovery for the air-conditioning and freezing applications. In the present work, an experimental prototype of an exhaust-heat-driven NH3-NaSCN absorption refrigeration system was designed and built to evaluate the performance. The prototype was designed to be constructed by commonly used devices for the purpose of cost reduction and easy manufacture. A finned-tube generator was specially designed for the exhaust-gas heat sources. The heat source from the exhaust simulation unit was supplied to the generator at temperatures between 150°C and 350°C. Experiments with variational operating conditions, such as exhaust-gas temperatures, cooling-water temperatures, chilled-water temperatures, have been conducted for varying parameters. The results showed that the minimum evaporating temperature of the prototype decreased to -24.56°C; the cooling capacity produced by the prototype was ranging from 0.748 kW to 5.60 kW. The maximum coefficient of performance based on electrical power was 17.58, and the overall coefficient of performance based on both electrical power and thermal energy varied between 0.351 and 0.653. The prototype showed satisfactory performance under wide operating conditions, indicating that the system is appropriate for both air-conditioning and freezing applications. The present study provides significant references for the optimization and application of the exhaust-heat-driven ammonia-salt absorption refrigeration systems.
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Details

  • Original title: Comprehensive experimental evaluation of an exhaust-heat-driven absorption refrigeration cycle system using NH3-NaSCN as working pair.
  • Record ID : 30028296
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 126
  • Publication date: 2021/06
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.01.013

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