孔板波纹填料热源塔换热及阻力特性实验研究

Experimental Study on Heat Transfer and Pressure Drop of Heat Source Tower with Corrugated Plate Packing

为了解决热源塔按冬季换热需求设计体积偏大的问题,本文对采用小片距大比表面积孔板波纹填料的热源塔进行实验研究,搭建了横流式热源塔实验平台,以乙二醇溶液为循环工质,实验获得了空气流量、温度、含湿量及溶液流量、温度、浓度对孔板波纹填料热源塔热质传递的影响规律,研究了孔板波纹填料热源塔的阻力特性,并拟合出了传热传质系数及压降的关联式。实验结果表明孔板波纹填料热源塔的传热传质系数主要受风量密度和淋液密度影响,而填料的压降主要受风量密度影响,这为孔板波纹填料热源塔的使用和设计提供了依据。

In order to solve the problem of large design volume of heat source tower according to heat transfer demand in winter,experimental study on heat source tower with corrugated plate packing with small spacing and large specific surface area is conducted and the experimental system is constructed.Ethylene glycol is used as a circulating medium and the effects of flow rates,inlet temperature,humidity ratio,concentration of air and solution on the heat and mass transfer performance were investigated.The flow properties of the heat source tower filled with corrugated plate packing were studied.The correlation of the heat and mass transfer coefficient and the pressure drop was fitted.The results showed that the heat and mass transfer coefficients of the heat source tower filled with corrugated plate packing are mainly affected by the air mass flux and the solution mass flux.The pressure drop is mainly affected by the air mass flux.This article provides a basis theory for the design and optimization of the heat source tower.