Theoretical solution for the cross-flow heat exchanger

被引:10
作者
Hofmann, A [1 ]
机构
[1] Linde AG, Weiksgrp VA, D-82049 Hollriegelskreuth, Germany
关键词
Partial Differential Equation; Temperature Difference; Local Temperature; Heat Balance; Simple Formula;
D O I
10.1007/s002310050374
中图分类号
O414.1 [热力学];
学科分类号
摘要
The theory of the cross-flow heat exchanger first was treated by NuBelt [1, 2] on the base of heat balances for the two interacting fluids over an exchanging area element. This leads to a partial differential equation. But the solution was an infinite row which could not be expressed in a compact formula. In this paper it will be shown that a compact formula for the infinite row is possible. All temperatures of the interacting fluids, for example the local fluid temperatures and the mean outlet temperatures as well as the local temperature difference and the mean temperature difference over the complete exchanger are now being available in simple formulae which have the form of an infinite sum. The summation has to be stopped at a finite value with a negligible deviation. As all variables in the formulae are dimensionless, normalized diagrams are developed which are generally valid and give a good overview over a wide range of exchanger conditions.
引用
收藏
页码:127 / 133
页数:7
相关论文
共 4 条
[1]  
[Anonymous], 1976, WARMEUBERTRAGUNG GEG
[2]   Heating by means of streaming media [J].
Anzelius, A .
ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK, 1926, 6 :291-294
[3]  
Nusselt W, 1911, Z VER DTSCH ING, V55, P2021
[4]  
Nusselt W, 1930, TECHNISCHE MECH THER, V1, P417