温室多层覆盖传热系数与热节省率的工程算法
针对温室环境工程设计和保温性评价中多层覆盖传热计算问题,研究了根据单层保温幕保温性数据确定多层覆盖传热系数的方法。运用工程传热学理论,推导了由单层保温幕热节省率计算多层保温幕热节省率的公式,进而可计算多层覆盖传热系数。计算式揭示了温室单层保温幕和多层覆盖传热参数间的定量关系,通过引入传热阻比这一新概念,形式更加简明。采用多种数据的综合检验结果表明,所提出计算式准确性较高,同一情况下由单层保温幕热节省率计算得出的3层保温幕热节省率,与直接获得的同一热节省率最大相差仅4.6%。论文提出的计算方法,可避免对多种材料组合的各种多层覆盖进行逐一测试,系统地解决了多层覆盖传热计算中热节省率和传热系数确定的...
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| Published in | 农业工程学报 Vol. 27; no. 7; pp. 264 - 269 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国农业大学农业部设施农业工程重点实验室,北京,100083
2011
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.3969/j.issn.1002-6819.2011.07.046 |
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| Abstract | 针对温室环境工程设计和保温性评价中多层覆盖传热计算问题,研究了根据单层保温幕保温性数据确定多层覆盖传热系数的方法。运用工程传热学理论,推导了由单层保温幕热节省率计算多层保温幕热节省率的公式,进而可计算多层覆盖传热系数。计算式揭示了温室单层保温幕和多层覆盖传热参数间的定量关系,通过引入传热阻比这一新概念,形式更加简明。采用多种数据的综合检验结果表明,所提出计算式准确性较高,同一情况下由单层保温幕热节省率计算得出的3层保温幕热节省率,与直接获得的同一热节省率最大相差仅4.6%。论文提出的计算方法,可避免对多种材料组合的各种多层覆盖进行逐一测试,系统地解决了多层覆盖传热计算中热节省率和传热系数确定的问题。 |
|---|---|
| AbstractList | S625%TU111.19; 针对温室环境工程设计和保温性评价中多层覆盖传热计算问题,研究了根据单层保温幕保温性数据确定多层覆盖传热系数的方法.运用工程传热学理论,推导了由单层保温幕热节省率计算多层保温幕热节省率的公式,进而可计算多层覆盖传热系数.计算式揭示了温室单层保温幕和多层覆盖传热参数间的定量关系,通过引入传热阻比这一新概念,形式更加简明.采用多种数据的综合检验结果表明,所提出计算式准确性较高,同一情况下由单层保温幕热节省率计算得出的3层保温幕热节省率,与直接获得的同一热节省率最大相差仪4.6％.论文提出的计算方法,可避免对多种材料组合的各种多层覆盖进行逐一测试,系统地解决了多层覆盖传热计算中热节省率和传热系数确定的问题. 针对温室环境工程设计和保温性评价中多层覆盖传热计算问题,研究了根据单层保温幕保温性数据确定多层覆盖传热系数的方法。运用工程传热学理论,推导了由单层保温幕热节省率计算多层保温幕热节省率的公式,进而可计算多层覆盖传热系数。计算式揭示了温室单层保温幕和多层覆盖传热参数间的定量关系,通过引入传热阻比这一新概念,形式更加简明。采用多种数据的综合检验结果表明,所提出计算式准确性较高,同一情况下由单层保温幕热节省率计算得出的3层保温幕热节省率,与直接获得的同一热节省率最大相差仅4.6%。论文提出的计算方法,可避免对多种材料组合的各种多层覆盖进行逐一测试,系统地解决了多层覆盖传热计算中热节省率和传热系数确定的问题。 |
| Author | 赵淑梅 马承伟 刘晨霞 张义 张建宇 孙国涛 |
| AuthorAffiliation | 中国农业大学农业部设施农业工程重点实验室,北京100083 |
| AuthorAffiliation_xml | – name: 中国农业大学农业部设施农业工程重点实验室,北京,100083 |
| Author_FL | Zhang Jianyu Zhang Yi Sun Guotao Zhao Shumei Ma Chengwei Liu Chenxia |
| Author_FL_xml | – sequence: 1 fullname: Zhao Shumei – sequence: 2 fullname: Ma Chengwei – sequence: 3 fullname: Liu Chenxia – sequence: 4 fullname: Zhang Yi – sequence: 5 fullname: Zhang Jianyu – sequence: 6 fullname: Sun Guotao |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DOI | 10.3969/j.issn.1002-6819.2011.07.046 |
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| DocumentTitleAlternate | Computing method for thermal transmittance and saving ratio of heat loss in multi-layer covering of greenhouse |
| DocumentTitle_FL | Computing method for thermal transmittance and saving ratio of heat loss in multi-layer covering of greenhouse |
| EndPage | 269 |
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| Keywords | 多层覆盖 热节省率 热传递 传热系数 温室 计算 |
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| Notes | Aiming at computing the heat transfer through multi-layer covering in environmental control design and insulation performance evaluation of a greenhouse,a computing method for thermal transmittance of multi-layer covering was developed based on the data of a single screen.According to heat transfer theory,the formula for saving ratio of heat loss of multi-layer screens were established from that of a single screen,and then the method for calculating the thermal transmittance of multi-layer covering was developed.The computing formula which quantifies the relationship between the heat transfer parameters of multi-layer covering and a single screen become simple by using a new parameter—heat insulation ratio.The high accuracy of the computing formula has been synthetically texted by different kinds of data.In a same case,the saving ratio of heat loss of three-layer screens established from that of a single screen was only 4.6% different from the same saving ratio of heat loss.The computing method developed in t |
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| PublicationTitle | 农业工程学报 |
| PublicationTitleAlternate | Transactions of the Chinese Society of Agricultural Engineering |
| PublicationTitle_FL | Transactions of the Chinese Society of Agricultural Engineering |
| PublicationYear | 2011 |
| Publisher | 中国农业大学农业部设施农业工程重点实验室,北京,100083 |
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| SubjectTerms | 传热系数 多层覆盖 温室 热传递 热节省率 计算 |
| Title | 温室多层覆盖传热系数与热节省率的工程算法 |
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