Simulation Study on the Performance of an Enhanced Vapor-Injection Heat-Pump Drying System

Suiju Dong, Yin Liu (), Zhaofeng Meng (), Saina Zhai, Ke Hu, Fan Zhang and Dong Zhou
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Suiju Dong: School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Yin Liu: School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Zhaofeng Meng: School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Saina Zhai: School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Ke Hu: School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Fan Zhang: School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
Dong Zhou: School of Energy & Environment, Zhongyuan University of Technology, Zhengzhou 450007, China

Energies, 2022, vol. 15, issue 24, 1-14

Abstract: The performance of an enhanced vapor-injection heat-pump drying system was designed and theoretically studied in cold areas. According to the simulation findings, the ideal vapor-injection charge of the system ranges from 12.3 to 13.9%, and its ideal intermediate pressure is between 1.278 and 1.498 MPa when the evaporation temperature is above 0 °C. The ideal vapor-injection charge of the system ranges from 13 to 20%, and its optimal intermediate pressure ranges from 1.078 to 1.278 MPa when the evaporation temperature is −15–0 °C. The ideal vapor-injection charge of the system ranges from 20 to 24%, and the intermediate pressure ranges from 0.898 to 1.078 MPa when the evaporation temperature is below −15 °C. The heat and humidity exhausted air source heat-pump drying (HHE–ASHPD) system has higher dehumidification efficiency than the closed heat-pump drying (CHPD) system under the same air temperature, humidity, and volume parameters.

Keywords: heat pump; drying; enhanced vapor injection; COP; SMER (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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