湿空气接触式换热过程建模与分析

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。

Temperature distribution of the incompletely mixed fluid flowing in the tubes and the unmixed fluid crossing over the tubes

A new model is established to describe heat exchanging of the incompletely mixed fluid flowing in the tubes and the unmixed fluid crossing out of the tubes in the heat-exchangers especially in air cooler. In the model, a new method of analyzing volume is proposed to develop the temperature distribution equations of the two fluids --tw（x） and ta（X,,7＂）. With tw（x） and ta （x, ,7）, the curves of the temperature distribution of the two fluids can be obtained. Also tw（x） and ta（x,n） can be used to calculate parameters of structure of an air cooler and to improve performances of it.