Mr. Wanrong Shi Profile

Wanrong Shi

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Proceedings Article | 30 August 2022 Paper

Experimental study on carbon dioxide refrigeration system combined with liquid desiccant dehumidification

Wanrong Shi, Qiaolian Feng, Xiao Liang, Dehua Cai, Yanfei Li

Proceedings Volume 12309, 1230924 (2022) https://doi.org/10.1117/12.2645823

KEYWORDS: Humidity, Energy efficiency, Carbon dioxide, Cooling systems

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The tropical marine environment is characterized by high temperature and high humidity, and the service life of electrical equipment will be greatly shortened under such high humidity. Traditional dehumidification technologies such as condensation dehumidification have low-efficiency issues; rotary dehumidification system takes up a lot of space and costs high; solid desiccant dehumidification system’s regeneration rate is slow and dehumidification efficiency is low. In the current trend of refrigerant researchers pursuing environmental friendliness and high energy efficiency, in this paper, the transcritical CO₂ (T-CO₂) compression refrigeration system is jointed with the liquid desiccant dehumidification circle, and the compressor’s exhaust heat is directed into the regenerator of the dehumidification system to regenerate the desiccant solution. According to experimental studies, this design improves the overall COP of the system from 2.61 (the CO₂ cycle alone) to 3.83 (the jointed system). This jointed system solves the mismatch of dehumidification & refrigeration load and inefficiency of condensing dehumidification in ordinary refrigeration systems, and effectively utilizes the high-grade exhaust heat of the T-CO₂ refrigeration system, solving the inefficiency of the T-CO₂ refrigeration cycle.

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