水平管降膜蒸发式凝汽器热力性能计算

Thermodynamic Performance Calculation of Horizontal Tube Falling Film Evaporative Condenser

本文建立了水平管降膜蒸发式凝汽器热力性能计算模型,包括空气流动阻力模型,降膜蒸发传热模型,降膜蒸发传质模型等,根据实验数据和工业中相关装置的运行参数对模型进行了修正,编制了降膜蒸发式凝汽器热力计算软件。计算分析了降膜蒸发式凝汽器的换热量、空气流动阻力、管外对流传热传质系数等随迎面风速,喷淋密度的变化趋势,进一步探究了换热量、管束间流动阻力的主要影响因素。

A thermodynamic performance calculation model of horizontal tube falling film evaporative condenser is established in this paper,including air flow resistance model,heat transfer model of falling film evaporation,and mass transfer model of falling film evaporation,etc.The model was modified according to the experimental data and the operating parameters of relevant devices in the industry.On the basis of the above,the thermal calculation software for falling film evaporative condenser is compiled.The variation trends of heat exchange,air flow resistance,convective heat and mass transfer coefficient outside the tube of falling film evaporative condenser with the head-on wind speed and spray density are calculated and analyzed.The main influencing factors of heat exchange and flow resistance between tube bundles are further explored.