Numerical Simulations of a Micro-Channel Wall-Tube Condenser for Domestic Refrigerators
In recent years, microchannel heat exchangers have begun to be used in refrigeration and air conditioning systems. This paper introduces a microchannel condenser for domestic refrigerators with a theoretical model to evaluate its performance. The model was used to obtain the optimal design parameter...
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| Published in | Tsinghua science and technology Vol. 15; no. 4; pp. 426 - 433 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Ltd
01.08.2010
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1007-0214 1878-7606 1007-0214 |
| DOI | 10.1016/S1007-0214(10)70083-3 |
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| Abstract | In recent years, microchannel heat exchangers have begun to be used in refrigeration and air conditioning systems. This paper introduces a microchannel condenser for domestic refrigerators with a theoretical model to evaluate its performance. The model was used to obtain the optimal design parameters for different numbers of tubes and tube lengths. The results show that the needed tube height of the down- ward section decreases with the number of tubes and the tube diameter. Compared with the original con- denser, the present optimal design parameters can reduce the total metal mass by 48.6% for the two wall two side design and by 26% for the two wall one side design. Thus, the present condenser is much better than the condensers usually used in actual domestic refrigerators. |
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| AbstractList | In recent years, microchannel heat exchangers have begun to be used in refrigeration and air conditioning systems. This paper introduces a microchannel condenser for domestic refrigerators with a theoretical model to evaluate its performance. The model was used to obtain the optimal design parameters for different numbers of tubes and tube lengths. The results show that the needed tube height of the downward section decreases with the number of tubes and the tube diameter. Compared with the original condenser, the present optimal design parameters can reduce the total metal mass by 48.6% for the two wall two side design and by 26% for the two wall one side design. Thus, the present condenser is much better than the condensers usually used in actual domestic refrigerators. In recent years, microchannel heat exchangers have begun to be used in refrigeration and air conditioning systems. This paper introduces a microchannel condenser for domestic refrigerators with a theoretical model to evaluate its performance. The model was used to obtain the optimal design parameters for different numbers of tubes and tube lengths. The results show that the needed tube height of the down- ward section decreases with the number of tubes and the tube diameter. Compared with the original con- denser, the present optimal design parameters can reduce the total metal mass by 48.6% for the two wall two side design and by 26% for the two wall one side design. Thus, the present condenser is much better than the condensers usually used in actual domestic refrigerators. |
| Author | 张会勇 李俊明 李红旗 |
| AuthorAffiliation | Key Laboratory of Thermal Science and Power Engineering of Ministry of Education,Department of Thermal Engineering, Tsinghua University, Beijing 100084, China; College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China |
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| References | Song (bib5) 2006 Gupta, Gopal (bib2) 2008; 31 Kawaji, Chung (bib8) 2008; 8 Bansal, Chin (bib1) 2002; 22 Li, Li (bib3) 2005; 25 Chisholm (bib9) 1967; 10 Yang, Tao (bib6) 2006 Shah (bib7) 1979; 22 Lemmon E W, McLinder M O, Huber M L. Reference fluid thermodynamic and transport properties. NIST Standard Reference Database 23, Version 7.1, Beta version, 2003. Li J M, Li H Q, Zhang H Y. A refrigerator condenser. Chinese Patent of Invention, CN1616904, 2005. (in Chinese). |
| References_xml | – volume: 22 start-page: 547 year: 1979 end-page: 556 ident: bib7 article-title: A general correlation for heat transfer during film condensation in tubes publication-title: Int. J. Heat Mass Transfer – reference: Lemmon E W, McLinder M O, Huber M L. Reference fluid thermodynamic and transport properties. NIST Standard Reference Database 23, Version 7.1, Beta version, 2003. – year: 2006 ident: bib6 publication-title: Heat Transfer – year: 2006 ident: bib5 publication-title: Theoretical and experimental research on a minitube condenser for refrigerators [Dissertation] – volume: 8 start-page: 239 year: 2008 end-page: 257 ident: bib8 article-title: Adiabatic gas-liquid flow in microchannels publication-title: Microscale Thermophysical Engineering – volume: 10 start-page: 1767 year: 1967 end-page: 1778 ident: bib9 article-title: A theoretical basis for the Lockhart-Martinelli correlation for two-phase flow publication-title: Int. J. Heat Mass Transfer – volume: 22 start-page: 1601 year: 2002 end-page: 1617 ident: bib1 article-title: Design and modeling of hot wall condensers in domestic refrigerators publication-title: Applied Thermal Engineering – volume: 25 start-page: 19 year: 2005 end-page: 31 ident: bib3 article-title: Expectation of micro/mini scale heat transfer enhancement for household air conditioners publication-title: China Construction Heating & Refrigration – reference: Li J M, Li H Q, Zhang H Y. A refrigerator condenser. Chinese Patent of Invention, CN1616904, 2005. (in Chinese). – volume: 31 start-page: 979 year: 2008 end-page: 988 ident: bib2 article-title: Modeling of hot-wall condensers for domestic refrigerator publication-title: Int. J. Refrigeration |
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| SubjectTerms | condenser Design engineering Design parameters Domestic Mathematical models micro-tube Microchannels numerical simulation Optimization refrigerator Refrigerators Tubes Walls 冷凝器 家用冰箱 微通道 换热器 数值模拟 空调系统 设计参数 |
| Title | Numerical Simulations of a Micro-Channel Wall-Tube Condenser for Domestic Refrigerators |
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