Thermodynamic Evaluation of LiCl-H 2 O and LiBr-H 2 O Absorption Refrigeration Systems Based on a Novel Model and Algorithm

Jie Ren, Zuoqin Qian, Zhimin Yao, Nianzhong Gan and Yujia Zhang
Additional contact information
Jie Ren: School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China
Zuoqin Qian: School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China
Zhimin Yao: School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China
Nianzhong Gan: School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China
Yujia Zhang: School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China

Energies, 2019, vol. 12, issue 15, 1-28

Abstract: An absorption refrigeration system (ARS) is an alternative to the conventional mechanical compression system for cold production. This study developed a novel calculation model using the Matlab language for the thermodynamic analysis of ARS. It was found to be reliable in LiCl-H 2 O and LiBr-H 2 O ARS simulations and the parametric study was performed in detail. Moreover, two 50 kW water-cooled single effect absorption chillers were simply designed to analyze their off-design behaviors. The results indicate that LiCl-H 2 O ARS had a higher coefficient of performance ( COP ) and exergetic efficiency, particularly in the lower generator or higher condenser temperature conditions, but it operated more restrictively due to crystallization. The off-design analyses revealed that the preponderant performance of LiCl-H 2 O ARS was mainly due to its better solution properties because the temperature of each component was almost the same for both chillers in the operation. The optimum inlet temperature of hot water for LiCl-H 2 O (83 °C) was lower than that of LiBr-H 2 O (98 °C). The cooling water inlet temperature should be controlled within 41 °C, otherwise the performances are discounted heavily. The COP and cooling capacity could be improved by increasing the temperature of hot water or chilled water properly, contrary to the exergetic efficiency.

Keywords: absorption refrigeration system; thermodynamic analysis; calculation model; LiCl-H 2 O; LiBr-H 2 O; off-design behaviors (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/15/3037/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/15/3037/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:15:p:3037-:d:255293

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().