管道保温传热计算软件系统.pdf

2010年
技术5设
2010
第4期
Pipeline Technique and Equipment
管道保温传热计算软件系统
艾振宙2,姜昌伟2
(1.长沙理工大学能源动力工程学院,湖南长沙4100
2.能源高效利用湖南省普通高等学校重点实验室,湖南长沙410004
摘要:开发了一种适用于流体储运保温、电力锅炉及工业炉窑排烟烟道保温、矩形工业炉窑保温使
用的方管保温优化设计软件。该软件将 Matlab7.0数学运算和图形绘制功能与VB6.0界面开发功能
结合,进行VB、 Matlab和 Excel混合编程。该软件结合有限差分法和焓降法,考虑保温材料热导率随温
度变化及管内壁综合表画传热热阻,软件计算与实际测量管内介质出口温度误差小于2.1%。该软件
能完成三维温度场分布计算并进行管内介质出口温度和散热损失优化计算,操作简便、适应性广、界面
友好。
关键词:管道保温;方管;混合编程;保温特性
中图分类号:TE832文献标识码:A文章编号:1004-9614(2010)04-0006-04
Software System of Heat Transfer Calculation for Pipeline Insulation
AI Zhen-zhou. 2, JIANG Chang-wei".
1. School of Energy and Power Engineering, Changsha niversity of Science and Technology, Changsha 410004, China
2. Key Laboratory of Efficient and Clean Energy Utilization, College of Hunan Province, Changsha 410004, China)
Abstract: A kind of new soft ware for square-pipe insulation, which is widely used in the insulation engineering of fuid stor
nd transportation, the gas flues of the power boilers and industrial fumaces, and the rectangle industrial fu
developed. It is combined with the powerfully mathematic and graphic capacity of Matlab 7.0 and the friendly interface capacity
of Visual Basic 6.0. It is successfully used in the technology of hybrid programming with Visual Basic, Matab and Excel. Based
on the finite difference and the enthalpy drop method, considering the thermal conductivity change with the temperature and the
thermal resistance of the pipeline inner surface, the software accuracy has been improved and the outlet temperature of the inner
media between the software calculation and the tests is less than 2. 1 %. Three dimensional temperature profiles, the outlet tem-
perature of the inner medial and the heat loss can be obtained. It is characteristic of the simple operation, wide-ranging applica
tion and friendly interface
Key words: pipeline insulation; square-pipeline; hybrid programming; characteristics of insulation
0引言
管内壁和与其接触的流体无温差,即忽略管内壁传热
管道保温广泛应用于建筑供热供暖和空调通风、热阻1-2,造成了计算精度相对较差。同时,有文献
化工流体输送、油气储运,低温液体储运、电力锅炉和只研究圆管的保温问题3-],计算精度较差,而实际
工.业炉窑高温排烟、锅炉髙濡蒸汽输送等领域,是工程中涉及到许多方管保温问题,如电力锅炉及其他
企业节能降耗的重要环节之一。管道保温涉及流固工业炉窑排烟烟道保温、矩形工业炉窑保温等都可以
耦合传热,保温层温度分布需耦合管内介质温度变化简化为方管保温问题,然而目前还没有相关文献的报
来进行计算4-?。
道,方管保温优化设计軟件也一直空缺。因而,开发
管道保温设计计算大多采用自编程序来求解管方管保温设计软件系统,以便选择合理的保温材料和
道温度分布,然而在这些自编程序中,多数涉及圆管保温层厚度,进而降低管内介质在管道输送时的冷
且将管道简化成二维(只考虑管道轴向和径向固体导(热)量损失就显得十分必要。
热)7-8,且假定保温材料热导率不随温度变化°-の
文中以方管保温层为研究对象,综合运用有限差
分法和焓降法,考虑内外保温层热导率随温度变化和
收稿日期:2009-08-07收修政稿日期:2010-03-18
管内壁传热热阻,建立完整的三维方管保温层温度场