喷淋工况下闭式热源塔传热特性

建立了闭式热源塔的数学模型,利用MATLAB自编程序,实现了对喷淋工况下热源塔的数值模拟,并将计算结果与实验结果进行了比较。利用程序得到了喷淋工况下的闭式热源塔内喷淋溶液、载热流体、空气焓值的分布,结果表明:塔内空气焓值呈线性分布,翅片换热器上半部分换热效果比下半部分好,塔的中部位置附近最先出现结霜现象,空气干球温度高于5.1℃,相对湿度高于75%,闭式热源塔热泵系统没有结霜风险,可以停止喷淋泵,有助减少热泵系统的运行能耗。

Performance of closed heat source tower under spraying conditions

Compling a program by matlab to investigate closed heat source tower operating under spraying conditions .The numerical results of the spray solution temperature , the refrigerant temperature , air enthalpy value were compared with the experimental ones . The program was used to calculate the distribution of the spray temperature ,refrigerant temperature ,air enthalpy in the closed heat source tower under spraying conditions .Some results were obtained .The air enthalpy is linear distribution and upper fin heat exchanger heat transfer effect is better than the lower part .The center of the tower is firstly frosting . The air dry bulb temperature is above 5.1 ℃and relative humidity is above 75% .The closed heat source heat pump system is without risk of frost ,so stopping the spray pump is viable in order to reduce the energy consumption of the operation of the heat pump system .