Performance of an Air Source Heat Pump Water Heater using Different Electronic Expansion Valve Control Methods
Because of the requirement of annual operation, an air source heat pump water heater has complex and variable working conditions. Therefore, there are higher requirements for air source heat pump water heater system control. Based on the flexible adjustment characteristics of the electronic expansio...
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| Format: | Article |
| Language: | zho |
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Journal of Refrigeration Magazines Agency Co., Ltd.
2019-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2019.06.070 |
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| author | Ji Tianwei Tao Leren Yu Zhongyang Yuan Zhaoyang Zhang Suhan |
| author_facet | Ji Tianwei Tao Leren Yu Zhongyang Yuan Zhaoyang Zhang Suhan |
| author_sort | Ji Tianwei |
| collection | DOAJ |
| description | Because of the requirement of annual operation, an air source heat pump water heater has complex and variable working conditions. Therefore, there are higher requirements for air source heat pump water heater system control. Based on the flexible adjustment characteristics of the electronic expansion valve, this study proposes a simple control method of the fixed discharge superheated temperature. Meanwhile, the control methods of a fixed valve opening and fixed superheated temperature were used to conduct experimental research and analyze their internal process. When the ambient temperature is 22 ℃，the experimental results show that the discharge temperature dramatically decreased under the control methods of a fixed valve opening; however, its coefficient of performance (COP) is the lowest and its compression risk with liquid is high. Although the COP is the highest under the control method of a fixed superheated temperature, the discharge temperature is also the highest. Under the control method of a fixed discharge superheated temperature, its COP is slightly lower than that of the fixed superheated temperature control method. However, the discharge temperature is effectively reduced by nearly 7 K on average. Meanwhile, compared to the fixed valve opening, its average COP increased 4.9% and the risk of compressor suction with a large amount of liquid refrigerant can be avoided. Therefore, this method effectively combines the advantage of the other two methods. |
| format | Article |
| id | doaj-art-252c101774cb4cad8f351fec897b47a1 |
| institution | DOAJ |
| issn | 0253-4339 |
| language | zho |
| publishDate | 2019-01-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-252c101774cb4cad8f351fec897b47a12025-08-20T03:00:06ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392019-01-014066508511Performance of an Air Source Heat Pump Water Heater using Different Electronic Expansion Valve Control MethodsJi TianweiTao LerenYu ZhongyangYuan ZhaoyangZhang SuhanBecause of the requirement of annual operation, an air source heat pump water heater has complex and variable working conditions. Therefore, there are higher requirements for air source heat pump water heater system control. Based on the flexible adjustment characteristics of the electronic expansion valve, this study proposes a simple control method of the fixed discharge superheated temperature. Meanwhile, the control methods of a fixed valve opening and fixed superheated temperature were used to conduct experimental research and analyze their internal process. When the ambient temperature is 22 ℃，the experimental results show that the discharge temperature dramatically decreased under the control methods of a fixed valve opening; however, its coefficient of performance (COP) is the lowest and its compression risk with liquid is high. Although the COP is the highest under the control method of a fixed superheated temperature, the discharge temperature is also the highest. Under the control method of a fixed discharge superheated temperature, its COP is slightly lower than that of the fixed superheated temperature control method. However, the discharge temperature is effectively reduced by nearly 7 K on average. Meanwhile, compared to the fixed valve opening, its average COP increased 4.9% and the risk of compressor suction with a large amount of liquid refrigerant can be avoided. Therefore, this method effectively combines the advantage of the other two methods.http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2019.06.070air-source heat pumpelectronic expansion valvefixed discharge superheated temperature controlCOP |
| spellingShingle | Ji Tianwei Tao Leren Yu Zhongyang Yuan Zhaoyang Zhang Suhan Performance of an Air Source Heat Pump Water Heater using Different Electronic Expansion Valve Control Methods Zhileng xuebao air-source heat pump electronic expansion valve fixed discharge superheated temperature control COP |
| title | Performance of an Air Source Heat Pump Water Heater using Different Electronic Expansion Valve Control Methods |
| title_full | Performance of an Air Source Heat Pump Water Heater using Different Electronic Expansion Valve Control Methods |
| title_fullStr | Performance of an Air Source Heat Pump Water Heater using Different Electronic Expansion Valve Control Methods |
| title_full_unstemmed | Performance of an Air Source Heat Pump Water Heater using Different Electronic Expansion Valve Control Methods |
| title_short | Performance of an Air Source Heat Pump Water Heater using Different Electronic Expansion Valve Control Methods |
| title_sort | performance of an air source heat pump water heater using different electronic expansion valve control methods |
| topic | air-source heat pump electronic expansion valve fixed discharge superheated temperature control COP |
| url | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2019.06.070 |
| work_keys_str_mv | AT jitianwei performanceofanairsourceheatpumpwaterheaterusingdifferentelectronicexpansionvalvecontrolmethods AT taoleren performanceofanairsourceheatpumpwaterheaterusingdifferentelectronicexpansionvalvecontrolmethods AT yuzhongyang performanceofanairsourceheatpumpwaterheaterusingdifferentelectronicexpansionvalvecontrolmethods AT yuanzhaoyang performanceofanairsourceheatpumpwaterheaterusingdifferentelectronicexpansionvalvecontrolmethods AT zhangsuhan performanceofanairsourceheatpumpwaterheaterusingdifferentelectronicexpansionvalvecontrolmethods |