Effect of Evaporator Position on Heat Pump Assisted Solid Desiccant Cooling Systems

Shuo Liu, Chang-Ho Jeong and Myoung-Souk Yeo
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Shuo Liu: Department of Architecture and Architectural Engineering, Graduate School, Seoul National University, Seoul 08826, Korea
Chang-Ho Jeong: Division of Architecture for Urban Planning & Real Estate Development, The University of Suwon, Hwaseong 18323, Korea
Myoung-Souk Yeo: Department of Architecture and Architectural Engineering, Institute of Construction and Environmental Engineering, Seoul National University, Seoul 08826, Korea

Energies, 2020, vol. 13, issue 22, 1-21

Abstract: The packaged terminal air conditioning with reheat (PTACR) system, as a commonly used dehumidification system, faces the problem of extra energy consumption in the deep-cooling and reheating processes. Therefore, different heat pump assisted hybrid solid desiccant cooling (HPDC) systems were proposed and their characteristics were investigated via EnergyPlus simulations. The system energy efficiency presents an upward trend with the increase in outdoor temperature and humidity. A high-humidity climate leads to the improvement of system performance. The dehumidification performance of the desiccant wheel in the HPDC system declines when outdoor humidity increases. Compared with the PTACR system, the energy consumption of the HPDC system in which the evaporator was placed upstream of the desiccant wheel is reduced by 36%, 66%, and 64%, respectively, under different high-humidity climates. The system maintained the indoor environment within the comfort zone, and eliminated the need for a heat source for desiccant regeneration. In conclusion, the HPDC system is an available alternative that considers both energy consumption and system performance. Placing the evaporator upstream of the desiccant wheel is more advantageous in high-temperature and high-humidity climates.

Keywords: hybrid solid desiccant cooling; evaporator location; condenser heat utilization; dehumidification; system performance (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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