液体循环热回收系统性能参数模拟与优化设计

Performance Parameters Simulation and Optimization Design of Liquid Circulating Heat Recovery System

为了降低洁净室全新风空调系统的能耗,基于深圳某生物医药洁净车间的液体循环热回收系统,采用效能-传热单元数法建立盘管数学模型,模拟系统性能参数,并设计正交试验分析因素主次和优方案,最后提出一种加强换热的措施。研究结果表明:水流量在2.5kg/s时,盘管换热量达到峰值。室外温湿度增加,热回收量最大增幅88%,室内温湿度增加,热回收量最大减幅14%。通过正交试验结果表明:影响热回收量的因素主次为水流量、室外温度、室内温度、室外相对湿度、室内相对湿度,优方案为水流量3.5kg/s,室内温度24℃,室内相对湿度50%。加强换热后系统总体节能20kW。

In order to reduce the energy consumption of clean room fresh air air-conditioning system,based on a Shenzhen biomedical clean workshop liquid circulation heat recycling system,used efficiency-number of heat transfer unit method to establish coil mathematical model,simulated system performance parameters,and designed orthogonal test analysis factors of primary and secondary and optimal scheme,finally,a measure to strengthen the heat exchange is proposed.The results show that when the water flow is 2.5kg/s,the coil heat exchange reaches the peak.Outdoor temperature and humidity increase,the maximum heat recovery increased by 88%,indoor temperature and humidity increase,the maximum heat recovery decreased by 14%.The orthogonal test results show that the main factors affecting heat recovery are water flow,outdoor temperature,indoor temperature,indoor relative humidity,indoor relative humidity.The optimal scheme is water flow is 3.5kg/s,indoor temperature is 24℃,and indoor relative humidity is 50%.The overall energy saving of the system is 20kW.