Academic Journal
Numerical investigation of the heating efficiency of CO2 heat pump water heater system in cold environments.
| العنوان: | Numerical investigation of the heating efficiency of CO |
|---|---|
| المؤلفون: | He, Jiazhen1 (AUTHOR), Li, Shuhong1 (AUTHOR) equart@seu.edu.cn |
| المصدر: | Heat & Mass Transfer. Sep2024, Vol. 60 Issue 9, p1573-1584. 12p. |
| مصطلحات موضوعية: | *HEAT pump efficiency, *WATER heaters, *WATER temperature, *HOT water, *WATER pumps, *HEAT pumps |
| مستخلص: | This paper introduces a novel a CO2 mechanical subcooling heat pump water heater (MSHPWH) to improve the heating performance in low temperatures. By utilizing a mechanical subcooling (MS) cycle, additional heat is supplied to cooling water, improving system efficiency. The study evaluates the heating COP (COPh), power consumption and temperature of hot water under various steady-state operating conditions. Results indicate that the COPh of the MSHPWH increases by 44% to 57% compared to conventional HPWH as ambient temperatures range from -25 ℃ to -5 ℃. The MS cycle proves beneficial, with a subcooling range of 4 ℃ to 20 ℃. Adjusting the refrigerant mass flow rate ratio enhances heating output and hot water temperature. Changes in the mass flow rate ratio impact COPh and the temperature of hot water concurrently. This research highlights the innovative MS cycle's significant role in enhancing CO2 heat pump water heater performance in cold climates, showcasing its potential as an eco-friendly and efficient heating solution. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: | Academic Search Index |
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1 |
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asx Academic Search Index 179395071 1430 6 Academic Journal academicJournal 1430.20434570313 |
| PLink |
https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=asx&AN=179395071&custid=s6537998&authtype=sso |
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Array ( [Name] => Author [Label] => Authors [Group] => Au [Data] => <searchLink fieldCode="AR" term="%22He%2C+Jiazhen%22">He, Jiazhen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Shuhong%22">Li, Shuhong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> equart@seu.edu.cn</i> ) Array ( [Name] => TitleSource [Label] => Source [Group] => Src [Data] => <searchLink fieldCode="JN" term="%22Heat+%26+Mass+Transfer%22">Heat & Mass Transfer</searchLink>. Sep2024, Vol. 60 Issue 9, p1573-1584. 12p. ) Array ( [Name] => Subject [Label] => Subject Terms [Group] => Su [Data] => *<searchLink fieldCode="DE" term="%22HEAT+pump+efficiency%22">HEAT pump efficiency</searchLink><br />*<searchLink fieldCode="DE" term="%22WATER+heaters%22">WATER heaters</searchLink><br />*<searchLink fieldCode="DE" term="%22WATER+temperature%22">WATER temperature</searchLink><br />*<searchLink fieldCode="DE" term="%22HOT+water%22">HOT water</searchLink><br />*<searchLink fieldCode="DE" term="%22WATER+pumps%22">WATER pumps</searchLink><br />*<searchLink fieldCode="DE" term="%22HEAT+pumps%22">HEAT pumps</searchLink> ) Array ( [Name] => Abstract [Label] => Abstract [Group] => Ab [Data] => This paper introduces a novel a CO2 mechanical subcooling heat pump water heater (MSHPWH) to improve the heating performance in low temperatures. By utilizing a mechanical subcooling (MS) cycle, additional heat is supplied to cooling water, improving system efficiency. The study evaluates the heating COP (COPh), power consumption and temperature of hot water under various steady-state operating conditions. Results indicate that the COPh of the MSHPWH increases by 44% to 57% compared to conventional HPWH as ambient temperatures range from -25 ℃ to -5 ℃. The MS cycle proves beneficial, with a subcooling range of 4 ℃ to 20 ℃. Adjusting the refrigerant mass flow rate ratio enhances heating output and hot water temperature. Changes in the mass flow rate ratio impact COPh and the temperature of hot water concurrently. This research highlights the innovative MS cycle's significant role in enhancing CO2 heat pump water heater performance in cold climates, showcasing its potential as an eco-friendly and efficient heating solution. [ABSTRACT FROM AUTHOR] ) |
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