R290和R22在水平细圆管内流动凝结换热的实验研究
实验研究了R290、1122在细圆管中的流动凝结换热特性。实验管内径为1．085mm，R22的质量流率为200—1200kg／（m2·s）：R290的质量流率为200—650kg／（m2·s），饱和温度分别为40℃与50℃。实验结果表明，高质量流率时R22在较高干度下换热系数随干度增加缓慢或略有下降，低质量流率时，11290在较小于度下出现换热系数下降。两种制冷剂蒸气相比，相同条件下R290的凝结换热系数高于1t22的。本文的实验结果还与现有典型关联式的计算结果作了对比，其中，Wangeta1．（2002）关联式对R290的实验数据预测偏差在17．5％之内，Kim et al．（2013）关联...
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| Published in | 制冷学报 Vol. 36; no. 5; pp. 22 - 29 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
清华大学热能工程系 热科学与动力工程教育部重点实验室 北京 100084
2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-4339 |
| DOI | 10.3969/j.issn.0253-4339.2015.05.022 |
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| Abstract | 实验研究了R290、1122在细圆管中的流动凝结换热特性。实验管内径为1．085mm，R22的质量流率为200—1200kg／（m2·s）：R290的质量流率为200—650kg／（m2·s），饱和温度分别为40℃与50℃。实验结果表明，高质量流率时R22在较高干度下换热系数随干度增加缓慢或略有下降，低质量流率时，11290在较小于度下出现换热系数下降。两种制冷剂蒸气相比，相同条件下R290的凝结换热系数高于1t22的。本文的实验结果还与现有典型关联式的计算结果作了对比，其中，Wangeta1．（2002）关联式对R290的实验数据预测偏差在17．5％之内，Kim et al．（2013）关联式对R22的实验数据预测偏差在18．4％之内。 |
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| AbstractList | TK124%TB61+2%TB657.5; 实验研究了R290、R22在细圆管中的流动凝结换热特性。实验管内径为1.085 mm,R22的质量流率为200~1200 kg/( m2?s),R290的质量流率为200~650 kg/( m2?s),饱和温度分别为40℃与50℃。实验结果表明,高质量流率时R22在较高干度下换热系数随干度增加缓慢或略有下降,低质量流率时,R290在较小干度下出现换热系数下降。两种制冷剂蒸气相比,相同条件下R290的凝结换热系数高于R22的。本文的实验结果还与现有典型关联式的计算结果作了对比,其中,Wang et al.(2002)关联式对R290的实验数据预测偏差在17.5％之内,Kim et al.(2013)关联式对R22的实验数据预测偏差在18.4％之内。 实验研究了R290、1122在细圆管中的流动凝结换热特性。实验管内径为1．085mm，R22的质量流率为200—1200kg／（m2·s）：R290的质量流率为200—650kg／（m2·s），饱和温度分别为40℃与50℃。实验结果表明，高质量流率时R22在较高干度下换热系数随干度增加缓慢或略有下降，低质量流率时，11290在较小于度下出现换热系数下降。两种制冷剂蒸气相比，相同条件下R290的凝结换热系数高于1t22的。本文的实验结果还与现有典型关联式的计算结果作了对比，其中，Wangeta1．（2002）关联式对R290的实验数据预测偏差在17．5％之内，Kim et al．（2013）关联式对R22的实验数据预测偏差在18．4％之内。 |
| Abstract_FL | The condensation heat transfer characteristics of R290 and R22 were investigated experimentally in a horizontal circular mini-tube with 1. 085 mm diameter. The mass flow rate of R22 is 200-1200 kg/(m2?s), and that of R290 is 200-650 kg/(m2?s). The saturation temperature is 40 ℃ and 50 ℃ respectively during the experiment. The experimental results show that at the higher mass flow rate of R22, the condensation heat transfer coefficient increases slowly or even decreases little with the vapor quality increasing, for the R290 at a less mass flow rate, the heat transfer coefficient will decreases slightly at a low vapor quality. The condensation heat transfer co-efficient of R290 is higher than that of the R22 at the same experimental conditions. The experimental results are also compared with some of the existing correlations, which shows that the Wang et al. (2002) correlation predicts the experimental data of R290 very well ,with an overall mean absolute error of 17. 5%, while Kim et al. (2013) correlation makes the best prediction to the R22’s data, with an overall mean absolute error of 18. 4%. |
| Author | 肖航 李俊明 |
| AuthorAffiliation | 清华大学热能工程系热科学与动力工程教育部重点实验窒,北京100084 |
| AuthorAffiliation_xml | – name: 清华大学热能工程系 热科学与动力工程教育部重点实验室 北京 100084 |
| Author_FL | Xiao Hang Li Junming |
| Author_FL_xml | – sequence: 1 fullname: Xiao Hang – sequence: 2 fullname: Li Junming |
| Author_xml | – sequence: 1 fullname: 肖航 李俊明 |
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| DOI | 10.3969/j.issn.0253-4339.2015.05.022 |
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| DocumentTitleAlternate | Experimental Study on the Flow Condensation Heat Transfer of R290 and R22 in a Horizontal Circular Minitube |
| DocumentTitle_FL | Experimental Study on the Flow Condensation Heat Transfer of R290 and R22 in a Horizontal Circular Minitube |
| EndPage | 29 |
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| Keywords | R290 minichannel convective heat transfer 对流换热 flow condensation 流动凝结 微细通道 |
| Language | Chinese |
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| Notes | 11-2182/TB Xiao Hang Li Junming （Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engi- neering, Tsinghua University, Beijing, 100084, China） minichannel; flow condensation; convective heat transfer; R290 The condensation heat transfer characteristics of R290 and R22 were investigated experimentally in a horizontal circular minitube with 1. 085 mm diameter. The mass flow rate of R22 is 200 - 1900 kg/（ m2 · s）, and that of R290 is 200 -650 kg/（ m2 ·s）. The saturation temperature is 40 ℃and 50 ℃ respectively during the experiment. The experimental results show that at the higher mass flow rate of R22, the condensation heat transfer coefficient increases slowly or even decreases little with the vapor quality increasing, for the R290 at a less mass flow rate, the heat transfer coefficient will decreases slightly at a low vapor quality. The condensation heat transfer coefficient of R290 is higher than that of the R22 at the same experimental conditions. The expe |
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| PublicationTitle | 制冷学报 |
| PublicationTitleAlternate | Journal of Refrigeration |
| PublicationTitle_FL | Journal of Refrigeration |
| PublicationYear | 2015 |
| Publisher | 清华大学热能工程系 热科学与动力工程教育部重点实验室 北京 100084 |
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| Snippet | 实验研究了R290、1122在细圆管中的流动凝结换热特性。实验管内径为1．085mm，R22的质量流率为200—1200kg／（m2·s）：R290的质量流率为200—650kg／（m2·s），饱和温度分别... TK124%TB61+2%TB657.5; 实验研究了R290、R22在细圆管中的流动凝结换热特性。实验管内径为1.085 mm,R22的质量流率为200~1200 kg/( m2?s),R290的质量流率为200~650 kg/(... |
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| SubjectTerms | R290 微细通道 流动凝结：对流换热 |
| Title | R290和R22在水平细圆管内流动凝结换热的实验研究 |
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