TBVMC的冷却塔热力性能优化控制方法

摘要

First of all, theoretical analysis was conducted on the relation among pump speed, flowrate, head of delivery, power, and speed ratio. A boundary constraint value by measurement temperature(TBVMC) thermal performance optimization model was established. Secondly, the control mechanism of pump and fan variable frequency were researched respectively.A temperature basedcooling tower thermal performance optimization control method was proposed.Finally the measurement and execution module for CEF-370A stainless steel cooling tower was set up to verify the optimal control effect. The results show that the relative deviation between frequency fitting value and measured value is less than ±2.4% in each test temperature difference.%该文提出一种冷却塔热力性能优化控制方法，首先在温度边值测量约束（TBVMC）模型基础上，理论分析水泵转速与水量、扬程、功率与调速比的关系，提出冷却塔性能优化方法；其次，分别研究水泵、风机变频控制机理，提出基于定温差的水泵、风机频率控制方法，实现冷却塔热力性能优化控制；最后，为CEF-370A不锈钢逆流冷却塔搭建测量与执行模块，验证优化控制效果。结果表明：在各个测试温差下，频率拟合值与实测值相对偏差在±2.4%以内。