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Study on the Performance of Precooled Liquid Desiccant DehumidificationAir Conditioning System Combined with Heat Pump(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2021年02期
Page:
1-8
Research Field:
动力工程及工程热物理
Publishing date:

Info

Title:
Study on the Performance of Precooled Liquid Desiccant DehumidificationAir Conditioning System Combined with Heat Pump
Author(s):
Yan Lei; Li Wenzheng; Wu Wei; He Yijing; Guo Chenyu; Zhang Qiyue; Liao Yangsang
School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China
Keywords:
liquid desiccant dehumidification; condensation heat distribution; return air ratio; frozen water temperature
PACS:
TU834.9
DOI:
10.3969/j.issn.1672-1292.2021.02.001
Abstract:
A precooled solution dehumidification air conditioning system combined with a heat pump is proposed. The indoor return air is used as the regenerated air,the condensing heat pump is used to preheat the regenerated air and the regenerated solution,and the chilled water is used as the pre-cooled dehumidification solution. An overall mathematical model of the system is established,which is in good agreement with the experimental data. The effects of the cooling heat distribution ratio φ of the heat pump in the regeneration side,the return air ratio Rhf of the regenerated air and the inlet temperature tw,in of the chilled water in the dehumidification side on the system performance are simulated and studied. The results show that the regeneration capacity,dehumidification capacity and performance coefficient of the system decrease with the increase of φ. With the increase of Rhf,the dehumidification capacity and the system performance coefficient increase by 30.95% and 20.07%,respectively. When tw,in increases,the regulation on the regeneration side can inhibit the further decline of the dehumidification capacity. The research results provide ideas for the optimization of solution dehumidification air conditioning system.

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Last Update: 2021-06-30