Performance Analysis of Heat Pump Dryer with Unit-Room in Cold Climate Regions

Ya Yuan, Wenye Lin, Xiang Mao, Weizhao Li, Luwei Yang, Juan Wei and Bo Xiao
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Ya Yuan: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Wenye Lin: Sustainable Buildings Research Centre (SBRC), University of Wollongong (UOW), Wollongong, NSW 2519, Australia
Xiang Mao: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Weizhao Li: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Luwei Yang: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Juan Wei: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Bo Xiao: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Energies, 2019, vol. 12, issue 16, 1-18

Abstract: This study presents the development and evaluation of a novel partially open-loop heat pump dryer with a unit-room (HPDU). The unit-room was designed to enable the ambient air to be mixed with the return air, thereby reducing the influence of the ambient air on the system performance, while maintaining a high system thermal efficiency. A modelling system for the HPDU was developed and validated based on a real-scale experimental study. By using the modelling system, the system characteristics under different ambient conditions and bypass factors were analyzed. The energy benefit of the proposed HPDU was quantified through a comparative study with a closed-loop heat pump dryer (CHPD). It is evident that a maximal specific moisture extraction rate (SMER) and a minimal total energy consumption (TEC) existed when changing the bypass factor of the HPDU under certain ambient temperatures. Compared to the CHPD, the coefficient of performance (COP) of the HPDU increased by up to 39.56%, presenting a significant energy benefit for the application of HPDU.

Keywords: heat pump dryer; energy efficiency; partially open-loop; specific moisture extraction rate (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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