Study on Characteristics of Frost-free Air Source Heat Pump System with Large Capacity and Screw Compressor
In this study a novel frost-free air-source heat pump (FASHP) system, which uses the waste heat of a screw compressor for auxiliary desorption, was proposed. A mathematical model of FASHP with waste heat desorption was developed, and the accuracy of this model was verified experimentally. A theoreti...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2022-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2022.01.046 |
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| Summary: | In this study a novel frost-free air-source heat pump (FASHP) system, which uses the waste heat of a screw compressor for auxiliary desorption, was proposed. A mathematical model of FASHP with waste heat desorption was developed, and the accuracy of this model was verified experimentally. A theoretical analysis was conducted concerning the influence of ambient temperature, relative humidity, air temperature, and flow rate on the desorption of the system. The results show that the ratio of the waste heat that the system can use for desorption to the total energy required for desorption could reach 0.61. The coefficient of performance (COP) was affected by the air temperature and humidity, but less affected by the temperature and mass flow of the desorption air. As the ambient temperature increased and the relative humidity decreased to the working condition at 7 °C/70%, the COP reached 2.52. The COP of the novel FASHP system increased by 10% compared to the original system. It was proved that this system can run efficiently and continuously under low-temperature and high-humidity environmental conditions |
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| ISSN: | 0253-4339 |