用于换热器热计算的θ-P图及其绘制方法

COMPUTER DRAWING OF θ-P CHARTS FOR CALCULATING HEAT OF HEAT EXCHANGERS

根据不同类型间壁式换热器的热计算公式F =f(P ,R)和ε =Φ(NTU ,RC) ,给出了绘制θ -P图的方法。用计算机绘图程序 ,分别绘制了逆流、顺流、错流 (一种流体混合及两种流体都混合 )、〈1- 2〉型管壳式、〈1- 4〉型对分流式和〈1- 2〉型分流式 7种间壁式换热器的θ

A method for drawing a θ P chart is developed according to the formulas for calculating the heat transfer of different types of heat exchangers. The θ P charts for seven different types of heat exchangers with counter flow, parallel flow, cross flows of one mixed fluid and both mixed fluids, 1 2 shell and tube, 1 4 double split flowing and 1 2 split flowing are plotted with drawing program on computer respectively.