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Energy Performance Comparison of Two Different Types of Heat Pump-Driven Liquid Desiccant-Assisted Air-Conditioning Systems for an Apartment Building.

Number: No 095

Author(s) : LEE J. H., LIM H., DONG H. W., JEONG J. W.

Summary

The purpose of this study is to compare the energy performance of two heat pump-driven liquid desiccant (HPLD) systems that use different mechanisms for solution pre-conditioning. The design and operating logic of the HPLD systems were proposed for an apartment building. The HPLD system comprises a liquid desiccant (LD) unit for dehumidifying the process air, and a heat pump (HP) unit for cooling and heating the LD solution and cooling the process air. In Case A, the temperature and concentration of the solution can be controlled simultaneously in the HPLD system using a single sump, whereas in Case B, they are controlled separately using a dual sump that uses an additional simple device. The load of the target zone and energy performance of the HPLD system were analyzed using TRNSYS 18 and commercial engineering equation solver (EES), respectively. The results showed that the method used in Case B saved 77 % of the operating energy. The mean system COP in Case B was three times higher compared to that in Case A owing to the decrease in the solution cooling and heating loads.

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  • Original title: Energy Performance Comparison of Two Different Types of Heat Pump-Driven Liquid Desiccant-Assisted Air-Conditioning Systems for an Apartment Building.
  • Record ID : 30029977
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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