| 钢外护管高温蒸汽真空保温管道热力计算分析 |
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| 引用本文： | 那威,邹平华,胡宝娣.钢外护管高温蒸汽真空保温管道热力计算分析[J].哈尔滨工业大学学报,2007,39(4):604-608. |
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| 作者姓名： | 那威 邹平华 胡宝娣 |
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| 作者单位： | 1. 哈尔滨工业大学,市政环境工程学院,哈尔滨,150090
2. 北京特洁能环保技术发展有限公司,北京,100028 |
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| 摘 要： | 研究钢外护管高温蒸汽真空保温管道(下文简称真空保温管道)保温材料层、真空层传热机理和合理热力计算方法,是优化其保温结构并提高其保温性能的关键.进行了真空保温管道热工性能实验,并应用稀薄气体分子热运动理论,研究了真空保温管道的保温材料层和真空层传热机理,提出了不同钢外护管和工作钢管尺寸、真空层压力、热媒温度下的真空保温管道的当量导热系数和换热量计算方法,采用该方法的计算结果与实验值对比,最大偏差8.6%,最小偏差0.5%,计算结果说明该方法正确.计算真空层压力处于中、低真空下的真空保温管道的换热时不应忽略真空层中的对流换热.为获得满意的保温效果,应将真空层绝对压力控制在2 kPa以下.
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| 关 键 词： | 真空保温 当量导热系数 热力管道 对流换热 钢外护管 |
| 文章编号： | 0367-6234(2007)04-0604-05 |
| 修稿时间： | 2005-04-04 |
Thermal analysis of steel -jacketed vacuum insulated heating pipeline |
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| NA Wei,ZOU Ping-hua,HU Bao-di.Thermal analysis of steel -jacketed vacuum insulated heating pipeline[J].Journal of Harbin Institute of Technology,2007,39(4):604-608. |
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| Authors: | NA Wei ZOU Ping-hua HU Bao-di |
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| Affiliation: | 1.School of Municipal and Environmental Engineering;Harbin Institute of Technology;Harbin 150090;China;2.Beijing Te-jie-neng Co.Ltd;Beijing 100028;China |
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| Abstract: | To improve the heat preservation performance and reduce the corrosion,steel-jacketed heating pipeline has been fabricated using vacuum insulation.It is important in optimizing the insulating effect of the vacuum insulated pipeline to achieve the method to calculate the thermal transfer of this pipeline and research the heat insulating material and heat-transfer mechanism.Experiments were performed to measure the heat transfer of steel jacketed vacuum insulated heating pipelines.Equivalent thermal conductivi... |
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| Keywords: | vacuum insulation equivalent thermal conductivity heating pipeline convection steel jacket |
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