Simulation Study on Performance of Solar-Powered Desiccant Wheel and Ground Source Heat Pump Air Conditioning in Qingdao

Yicheng Wu, Litong Hou, Tianxi Su and Yongzhi Ma ()
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Yicheng Wu: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
Litong Hou: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
Tianxi Su: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
Yongzhi Ma: College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China

Sustainability, 2024, vol. 16, issue 8, 1-16

Abstract: In China, a large amount of the total energy consumption is made up of building energy, particularly in humid regions. The conventional vapor compression refrigeration systems cannot effectively control the indoor humid and thermal environment. Therefore, this article proposes a solar-powered desiccant wheel and ground-source heat pump (SDW-GSHP) air conditioning system. The energy consumption of the system is mainly from sustainable sources of solar and geothermal energy, showcasing excellent energy efficiency and environmental friendliness. The desiccant wheel (DW) processes latent heat loads, and the GSHP processes the sensible heat load. The regeneration air of the DW is heated by a solar collector. The operational performance of the system was simulated by using TRNSYS during the typical summer week (15 July to 22 July) in Qingdao. The simulation results indicated that indoor temperature was maintained within 25.8–26.2 °C and the relative humidity was maintained in the range of 57–61%. The COP of the SDW-GSHP air conditioning system was 42.1% higher than that of the DW air conditioning system with electric heating regeneration, and electricity saved 43.7%.

Keywords: sustainable energy; desiccant wheel; ground-source heat pump; solar energy; geothermal energy (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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