Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers

At present, the liquefaction rate of small-scale helium liquefiers using 4 K cryocoolers is generally low. Helium condensation, the most critical heat transfer process in the system, is seldomly studied, and the design of condenser lacks accurate theoretical guidance. In this study, a CFD model for...
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Autor*in:	Wei, Tao [verfasserIn] Zhu, Shaolong [verfasserIn] Chen, Xin [verfasserIn] Zhi, Xiaoqin [verfasserIn] Wang, Kai [verfasserIn] Bao, Shiran [verfasserIn] Qiu, Limin [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	Helium liquefaction Film condensation Condenser Heat transfer coefficient

Übergeordnetes Werk:	Enthalten in: International journal of refrigeration - Amsterdam [u.a.] : Elsevier Science, 1978, 156, Seite 256-265
Übergeordnetes Werk:	volume:156 ; pages:256-265

DOI / URN:	10.1016/j.ijrefrig.2023.09.028

Katalog-ID:	ELV065957059

Internformat


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245	1	0	\|a Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers
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520			\|a At present, the liquefaction rate of small-scale helium liquefiers using 4 K cryocoolers is generally low. Helium condensation, the most critical heat transfer process in the system, is seldomly studied, and the design of condenser lacks accurate theoretical guidance. In this study, a CFD model for the film condensation of helium on the surfaces of condensers in small-scale helium liquefiers was established and verified. Compared with cryogenic fluids such as nitrogen, in the condensation of helium, the temperature difference and thermal resistance between the gas-liquid interface and saturated vapor cannot be ignored under small condensation temperature differences. On different surfaces of a cylindrical condenser, the thickness of liquid film on the vertical surface is lower than those on the horizontal surfaces, and its heat transfer coefficient is 1–3 times than those of horizontal surfaces. When the cooling capacity increases from 1 W to 2 W at 4.21 K, with the increase of the condensation temperature difference and thermal resistance brought by liquid film, the average heat transfer coefficient of condenser decreases from 530 W/(m2 K) to 446 W/(m2 K), the condensation efficiency decreases by 11.7 %. This study aims to provide theoretical guidance for the optimal design of the helium condensers in small-scale helium liquefiers.
650		4	\|a Helium liquefaction
650		4	\|a Film condensation
650		4	\|a Condenser
650		4	\|a Heat transfer coefficient
700	1		\|a Zhu, Shaolong \|e verfasserin \|4 aut
700	1		\|a Chen, Xin \|e verfasserin \|4 aut
700	1		\|a Zhi, Xiaoqin \|e verfasserin \|4 aut
700	1		\|a Wang, Kai \|e verfasserin \|4 aut
700	1		\|a Bao, Shiran \|e verfasserin \|4 aut
700	1		\|a Qiu, Limin \|e verfasserin \|4 aut
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publishDate	2023
allfields	10.1016/j.ijrefrig.2023.09.028 doi (DE-627)ELV065957059 (ELSEVIER)S0140-7007(23)00295-5 DE-627 ger DE-627 rda eng 620 VZ 52.43 bkl Wei, Tao verfasserin aut Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier At present, the liquefaction rate of small-scale helium liquefiers using 4 K cryocoolers is generally low. Helium condensation, the most critical heat transfer process in the system, is seldomly studied, and the design of condenser lacks accurate theoretical guidance. In this study, a CFD model for the film condensation of helium on the surfaces of condensers in small-scale helium liquefiers was established and verified. Compared with cryogenic fluids such as nitrogen, in the condensation of helium, the temperature difference and thermal resistance between the gas-liquid interface and saturated vapor cannot be ignored under small condensation temperature differences. On different surfaces of a cylindrical condenser, the thickness of liquid film on the vertical surface is lower than those on the horizontal surfaces, and its heat transfer coefficient is 1–3 times than those of horizontal surfaces. When the cooling capacity increases from 1 W to 2 W at 4.21 K, with the increase of the condensation temperature difference and thermal resistance brought by liquid film, the average heat transfer coefficient of condenser decreases from 530 W/(m2 K) to 446 W/(m2 K), the condensation efficiency decreases by 11.7 %. This study aims to provide theoretical guidance for the optimal design of the helium condensers in small-scale helium liquefiers. Helium liquefaction Film condensation Condenser Heat transfer coefficient Zhu, Shaolong verfasserin aut Chen, Xin verfasserin aut Zhi, Xiaoqin verfasserin aut Wang, Kai verfasserin aut Bao, Shiran verfasserin aut Qiu, Limin verfasserin aut Enthalten in International journal of refrigeration Amsterdam [u.a.] : Elsevier Science, 1978 156, Seite 256-265 Online-Ressource (DE-627)32041180X (DE-600)2001414-4 (DE-576)259271098 0140-7007 nnns volume:156 pages:256-265 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2116 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 52.43 Kältetechnik VZ AR 156 256-265
spelling	10.1016/j.ijrefrig.2023.09.028 doi (DE-627)ELV065957059 (ELSEVIER)S0140-7007(23)00295-5 DE-627 ger DE-627 rda eng 620 VZ 52.43 bkl Wei, Tao verfasserin aut Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier At present, the liquefaction rate of small-scale helium liquefiers using 4 K cryocoolers is generally low. Helium condensation, the most critical heat transfer process in the system, is seldomly studied, and the design of condenser lacks accurate theoretical guidance. In this study, a CFD model for the film condensation of helium on the surfaces of condensers in small-scale helium liquefiers was established and verified. Compared with cryogenic fluids such as nitrogen, in the condensation of helium, the temperature difference and thermal resistance between the gas-liquid interface and saturated vapor cannot be ignored under small condensation temperature differences. On different surfaces of a cylindrical condenser, the thickness of liquid film on the vertical surface is lower than those on the horizontal surfaces, and its heat transfer coefficient is 1–3 times than those of horizontal surfaces. When the cooling capacity increases from 1 W to 2 W at 4.21 K, with the increase of the condensation temperature difference and thermal resistance brought by liquid film, the average heat transfer coefficient of condenser decreases from 530 W/(m2 K) to 446 W/(m2 K), the condensation efficiency decreases by 11.7 %. This study aims to provide theoretical guidance for the optimal design of the helium condensers in small-scale helium liquefiers. Helium liquefaction Film condensation Condenser Heat transfer coefficient Zhu, Shaolong verfasserin aut Chen, Xin verfasserin aut Zhi, Xiaoqin verfasserin aut Wang, Kai verfasserin aut Bao, Shiran verfasserin aut Qiu, Limin verfasserin aut Enthalten in International journal of refrigeration Amsterdam [u.a.] : Elsevier Science, 1978 156, Seite 256-265 Online-Ressource (DE-627)32041180X (DE-600)2001414-4 (DE-576)259271098 0140-7007 nnns volume:156 pages:256-265 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2116 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 52.43 Kältetechnik VZ AR 156 256-265
allfields_unstemmed	10.1016/j.ijrefrig.2023.09.028 doi (DE-627)ELV065957059 (ELSEVIER)S0140-7007(23)00295-5 DE-627 ger DE-627 rda eng 620 VZ 52.43 bkl Wei, Tao verfasserin aut Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier At present, the liquefaction rate of small-scale helium liquefiers using 4 K cryocoolers is generally low. Helium condensation, the most critical heat transfer process in the system, is seldomly studied, and the design of condenser lacks accurate theoretical guidance. In this study, a CFD model for the film condensation of helium on the surfaces of condensers in small-scale helium liquefiers was established and verified. Compared with cryogenic fluids such as nitrogen, in the condensation of helium, the temperature difference and thermal resistance between the gas-liquid interface and saturated vapor cannot be ignored under small condensation temperature differences. On different surfaces of a cylindrical condenser, the thickness of liquid film on the vertical surface is lower than those on the horizontal surfaces, and its heat transfer coefficient is 1–3 times than those of horizontal surfaces. When the cooling capacity increases from 1 W to 2 W at 4.21 K, with the increase of the condensation temperature difference and thermal resistance brought by liquid film, the average heat transfer coefficient of condenser decreases from 530 W/(m2 K) to 446 W/(m2 K), the condensation efficiency decreases by 11.7 %. This study aims to provide theoretical guidance for the optimal design of the helium condensers in small-scale helium liquefiers. Helium liquefaction Film condensation Condenser Heat transfer coefficient Zhu, Shaolong verfasserin aut Chen, Xin verfasserin aut Zhi, Xiaoqin verfasserin aut Wang, Kai verfasserin aut Bao, Shiran verfasserin aut Qiu, Limin verfasserin aut Enthalten in International journal of refrigeration Amsterdam [u.a.] : Elsevier Science, 1978 156, Seite 256-265 Online-Ressource (DE-627)32041180X (DE-600)2001414-4 (DE-576)259271098 0140-7007 nnns volume:156 pages:256-265 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2116 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 52.43 Kältetechnik VZ AR 156 256-265
allfieldsGer	10.1016/j.ijrefrig.2023.09.028 doi (DE-627)ELV065957059 (ELSEVIER)S0140-7007(23)00295-5 DE-627 ger DE-627 rda eng 620 VZ 52.43 bkl Wei, Tao verfasserin aut Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier At present, the liquefaction rate of small-scale helium liquefiers using 4 K cryocoolers is generally low. Helium condensation, the most critical heat transfer process in the system, is seldomly studied, and the design of condenser lacks accurate theoretical guidance. In this study, a CFD model for the film condensation of helium on the surfaces of condensers in small-scale helium liquefiers was established and verified. Compared with cryogenic fluids such as nitrogen, in the condensation of helium, the temperature difference and thermal resistance between the gas-liquid interface and saturated vapor cannot be ignored under small condensation temperature differences. On different surfaces of a cylindrical condenser, the thickness of liquid film on the vertical surface is lower than those on the horizontal surfaces, and its heat transfer coefficient is 1–3 times than those of horizontal surfaces. When the cooling capacity increases from 1 W to 2 W at 4.21 K, with the increase of the condensation temperature difference and thermal resistance brought by liquid film, the average heat transfer coefficient of condenser decreases from 530 W/(m2 K) to 446 W/(m2 K), the condensation efficiency decreases by 11.7 %. This study aims to provide theoretical guidance for the optimal design of the helium condensers in small-scale helium liquefiers. Helium liquefaction Film condensation Condenser Heat transfer coefficient Zhu, Shaolong verfasserin aut Chen, Xin verfasserin aut Zhi, Xiaoqin verfasserin aut Wang, Kai verfasserin aut Bao, Shiran verfasserin aut Qiu, Limin verfasserin aut Enthalten in International journal of refrigeration Amsterdam [u.a.] : Elsevier Science, 1978 156, Seite 256-265 Online-Ressource (DE-627)32041180X (DE-600)2001414-4 (DE-576)259271098 0140-7007 nnns volume:156 pages:256-265 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2116 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 52.43 Kältetechnik VZ AR 156 256-265
allfieldsSound	10.1016/j.ijrefrig.2023.09.028 doi (DE-627)ELV065957059 (ELSEVIER)S0140-7007(23)00295-5 DE-627 ger DE-627 rda eng 620 VZ 52.43 bkl Wei, Tao verfasserin aut Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier At present, the liquefaction rate of small-scale helium liquefiers using 4 K cryocoolers is generally low. Helium condensation, the most critical heat transfer process in the system, is seldomly studied, and the design of condenser lacks accurate theoretical guidance. In this study, a CFD model for the film condensation of helium on the surfaces of condensers in small-scale helium liquefiers was established and verified. Compared with cryogenic fluids such as nitrogen, in the condensation of helium, the temperature difference and thermal resistance between the gas-liquid interface and saturated vapor cannot be ignored under small condensation temperature differences. On different surfaces of a cylindrical condenser, the thickness of liquid film on the vertical surface is lower than those on the horizontal surfaces, and its heat transfer coefficient is 1–3 times than those of horizontal surfaces. When the cooling capacity increases from 1 W to 2 W at 4.21 K, with the increase of the condensation temperature difference and thermal resistance brought by liquid film, the average heat transfer coefficient of condenser decreases from 530 W/(m2 K) to 446 W/(m2 K), the condensation efficiency decreases by 11.7 %. This study aims to provide theoretical guidance for the optimal design of the helium condensers in small-scale helium liquefiers. Helium liquefaction Film condensation Condenser Heat transfer coefficient Zhu, Shaolong verfasserin aut Chen, Xin verfasserin aut Zhi, Xiaoqin verfasserin aut Wang, Kai verfasserin aut Bao, Shiran verfasserin aut Qiu, Limin verfasserin aut Enthalten in International journal of refrigeration Amsterdam [u.a.] : Elsevier Science, 1978 156, Seite 256-265 Online-Ressource (DE-627)32041180X (DE-600)2001414-4 (DE-576)259271098 0140-7007 nnns volume:156 pages:256-265 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2116 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 52.43 Kältetechnik VZ AR 156 256-265
language	English
source	Enthalten in International journal of refrigeration 156, Seite 256-265 volume:156 pages:256-265
sourceStr	Enthalten in International journal of refrigeration 156, Seite 256-265 volume:156 pages:256-265
format_phy_str_mv	Article
bklname	Kältetechnik
institution	findex.gbv.de
topic_facet	Helium liquefaction Film condensation Condenser Heat transfer coefficient
dewey-raw	620
isfreeaccess_bool	false
container_title	International journal of refrigeration
authorswithroles_txt_mv	Wei, Tao @@aut@@ Zhu, Shaolong @@aut@@ Chen, Xin @@aut@@ Zhi, Xiaoqin @@aut@@ Wang, Kai @@aut@@ Bao, Shiran @@aut@@ Qiu, Limin @@aut@@
publishDateDaySort_date	2023-01-01T00:00:00Z
hierarchy_top_id	32041180X
dewey-sort	3620
id	ELV065957059
language_de	englisch
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author	Wei, Tao
spellingShingle	Wei, Tao ddc 620 bkl 52.43 misc Helium liquefaction misc Film condensation misc Condenser misc Heat transfer coefficient Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers
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topic_title	620 VZ 52.43 bkl Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers Helium liquefaction Film condensation Condenser Heat transfer coefficient
topic	ddc 620 bkl 52.43 misc Helium liquefaction misc Film condensation misc Condenser misc Heat transfer coefficient
topic_unstemmed	ddc 620 bkl 52.43 misc Helium liquefaction misc Film condensation misc Condenser misc Heat transfer coefficient
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title	Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers
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title_full	Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers
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author_browse	Wei, Tao Zhu, Shaolong Chen, Xin Zhi, Xiaoqin Wang, Kai Bao, Shiran Qiu, Limin
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doi_str_mv	10.1016/j.ijrefrig.2023.09.028
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title_sort	numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers
title_auth	Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers
abstract	At present, the liquefaction rate of small-scale helium liquefiers using 4 K cryocoolers is generally low. Helium condensation, the most critical heat transfer process in the system, is seldomly studied, and the design of condenser lacks accurate theoretical guidance. In this study, a CFD model for the film condensation of helium on the surfaces of condensers in small-scale helium liquefiers was established and verified. Compared with cryogenic fluids such as nitrogen, in the condensation of helium, the temperature difference and thermal resistance between the gas-liquid interface and saturated vapor cannot be ignored under small condensation temperature differences. On different surfaces of a cylindrical condenser, the thickness of liquid film on the vertical surface is lower than those on the horizontal surfaces, and its heat transfer coefficient is 1–3 times than those of horizontal surfaces. When the cooling capacity increases from 1 W to 2 W at 4.21 K, with the increase of the condensation temperature difference and thermal resistance brought by liquid film, the average heat transfer coefficient of condenser decreases from 530 W/(m2 K) to 446 W/(m2 K), the condensation efficiency decreases by 11.7 %. This study aims to provide theoretical guidance for the optimal design of the helium condensers in small-scale helium liquefiers.
abstractGer	At present, the liquefaction rate of small-scale helium liquefiers using 4 K cryocoolers is generally low. Helium condensation, the most critical heat transfer process in the system, is seldomly studied, and the design of condenser lacks accurate theoretical guidance. In this study, a CFD model for the film condensation of helium on the surfaces of condensers in small-scale helium liquefiers was established and verified. Compared with cryogenic fluids such as nitrogen, in the condensation of helium, the temperature difference and thermal resistance between the gas-liquid interface and saturated vapor cannot be ignored under small condensation temperature differences. On different surfaces of a cylindrical condenser, the thickness of liquid film on the vertical surface is lower than those on the horizontal surfaces, and its heat transfer coefficient is 1–3 times than those of horizontal surfaces. When the cooling capacity increases from 1 W to 2 W at 4.21 K, with the increase of the condensation temperature difference and thermal resistance brought by liquid film, the average heat transfer coefficient of condenser decreases from 530 W/(m2 K) to 446 W/(m2 K), the condensation efficiency decreases by 11.7 %. This study aims to provide theoretical guidance for the optimal design of the helium condensers in small-scale helium liquefiers.
abstract_unstemmed	At present, the liquefaction rate of small-scale helium liquefiers using 4 K cryocoolers is generally low. Helium condensation, the most critical heat transfer process in the system, is seldomly studied, and the design of condenser lacks accurate theoretical guidance. In this study, a CFD model for the film condensation of helium on the surfaces of condensers in small-scale helium liquefiers was established and verified. Compared with cryogenic fluids such as nitrogen, in the condensation of helium, the temperature difference and thermal resistance between the gas-liquid interface and saturated vapor cannot be ignored under small condensation temperature differences. On different surfaces of a cylindrical condenser, the thickness of liquid film on the vertical surface is lower than those on the horizontal surfaces, and its heat transfer coefficient is 1–3 times than those of horizontal surfaces. When the cooling capacity increases from 1 W to 2 W at 4.21 K, with the increase of the condensation temperature difference and thermal resistance brought by liquid film, the average heat transfer coefficient of condenser decreases from 530 W/(m2 K) to 446 W/(m2 K), the condensation efficiency decreases by 11.7 %. This study aims to provide theoretical guidance for the optimal design of the helium condensers in small-scale helium liquefiers.
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title_short	Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers
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author2	Zhu, Shaolong Chen, Xin Zhi, Xiaoqin Wang, Kai Bao, Shiran Qiu, Limin
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doi_str	10.1016/j.ijrefrig.2023.09.028
up_date	2024-07-07T00:50:06.041Z
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Numerical study of condensation heat transfer performance and liquid film distribution characteristics in small-scale helium liquefiers

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