湿空气接触式换热过程建模与分析

Modeling and Analysis of Wet Air Contact Heat Transfer Process

以湿空气为研究对象,提出了一种空气全热吸收装置,建立了空气与盐溶液换热的理论模型,通过二分法分析换热过程,研究了直接接触式换热装置中空气进口温度、空气相对湿度和盐水进口温度、盐水质量流量对热质交换性能,以及凝结水量和换热量的影响。研究结果表明:空气进口温度升高和相对湿度增加会加强热质交换程度;盐水进口温度升高会削弱热质交换程度,而盐水质量流量的增加可以增强传质传热。

A total heat absorption device for humid air was proposed as the research object, and a theoretical model for heat exchange between air and salt solution was established. The heat transfer process was analyzed using the binary method. The effects of air inlet temperature, relative humidity of air, inlet temperature of salt water and mass flow rate of salt water in a direct contact heat exchange device on heat and mass exchange performance as well as condensation water volume and heat transfer were studied. The research results indicate that an increase in air inlet temperature and relative humidity will enhance the heat and mass exchange degree;the increase in temperature of salt water inlet will weaken the degree of heat and mass exchange, while the increase in mass flow rate of salt water can enhance mass and heat transfer.