高效闭式冷却塔的优化设计及节能运行

研究分析了闭式冷却塔设计过程中运行参数的调整优化对换热器换热面积、压降的影响。以降低盘管换热面积、空气外掠管束压降、管程压降为目的,分别控制管内工质流速、喷淋密度、配风量、迎面风速,分析其对换热面积和压降的影响程度,并借助MATLAB数据分析得到最优运行参数。结果表明:盘管错排布置、工质流速1.2 m/s、喷淋密度0.12 kg/(m·s)、配风量175 m3/(kW·h)、迎面风速3.0 m/s时,可以使闭塔的换热面积和压降综合最小,从而达到所设计闭塔的初投资成本和运行费用综合最小。

Design optimization and energy-saving operation of high efficient closed circuit cooling tower

The adjustment and optimization of operating parameters in the process of designing high efficient closed circuit cooling tower were analyzed to reduce the heat transfer area and pressure loss as much as possible.Optimization theory was used to control the different variables including velocity of process water inside the tube,density of spray water,air face velocity and air distribution.MATLAB′s numerical analysis was used to reveal how much the variables work on the reduction of heat transfer area and pressure drop,which also helps to figure out the optimum operating parameters.The result shows that the optimum operating parameters are as follows: staggered arrangement,process water velocity of 1.2 m/s,spray water flow rate per unit length of 0.12 kg/(m·s),air face velocity of 3.0 m/s and air distribution of 175 m3/(kW·h),which lead to the comprehensive minimum of heat transfer area and pressure drop,and so do the production and running costs.