| 小管道基准保温层厚度的提出及其计算 |
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| 引用本文： | 王争昪,徐志军,任超,王学生. 小管道基准保温层厚度的提出及其计算[J]. 化工设备与管道, 2011, 48(3): 39-41,45 |
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| 作者姓名： | 王争昪 徐志军 任超 王学生 |
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| 作者单位： | 1. 华东理工大学,机械与动力工程学院,上海,200237
2. 上海电气压缩机泵业有限公司,上海,200431 |
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| 基金项目： | 上海市科委项目资助，编号为09dz1203000 |
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| 摘 要： | 基于牛顿(Newton)冷却定律,推导出了圆形管道的热流损失数学模型,介绍了基于该模型的临界保温层半径的理论推导.并在此基础上,提出了一个全新的概念--"基准保温层厚度(δj)",即敷设保温层与不敷设保温层(裸管)热流损失相当时,对应的保温层厚度.推导得出了δj满足的数学方程,并基于计算程序得到了其数值解.其结果对工农...
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| 关 键 词： | 临界保温层半径 基准保温层厚度 VB 二分法 |
Derivation of Benchmark Thickness of Insulator for Small Diameter Piping |
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| WANG Zheng-bian,XU Zhi-jun,REN Chao,WANG Xue-sheng. Derivation of Benchmark Thickness of Insulator for Small Diameter Piping[J]. Process Equipment & Piping, 2011, 48(3): 39-41,45 |
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| Authors: | WANG Zheng-bian XU Zhi-jun REN Chao WANG Xue-sheng |
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| Affiliation: | WANG Zheng-bian1,XU Zhi-jun2,REN Chao1,WANG Xue-sheng1(1.School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai,200237,China,2.Shanghai Electrical Compressor and Pump Co.,Ltd,Shanghai 200431,China) |
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| Abstract: | Mathematical model for the heat loss of insulated circular pipe was deduced from Newton’s cooling equation.And a formulation is developed for its critical insulation radius,which is based on the model.Based on a further study,a new concept of "benchmark insulation layer thickness(δj)",namely the thickness that of heat loss under the conditions of taking insulation and non-insulation is the same,is proposed in this paper.The mathematical equations of δj is developed through theoretical derivation,and its numerical solution is obtained based on a computer calculation procedure.The results of this study are vital significance for insulation of the small diameter pipes used in agricultural production or daily life. |
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| Keywords: | VB |
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