太阳能-空气能双源一体热泵制冷剂充注量研究

摘要

Because of the large difference in structural design and operating conditions compared with the traditional heat pump system, in the process of research the existing empirical formula of refrigerant filling quantity is not fit for the new integrative solar/air double source heat pump system. In this paper Tandon’s void fraction model and Maple applied mathematics software are used in the validation of refrigerant R134a filling quantity for the new heat pump system, and refrigerant filling quantity in the optimal conditions is gained. Experimental results show that the value deduced from this method is consistent with the actual optimum refrigerant filling quantity. More over, refrigerant filling quantity estimation formula for the integrative solar/air double source heat pump system is also given in this paper.%太阳能-空气能双源一体式热泵热水器由于在结构设计和运行工况上与普通热泵存在较大的差异，因此在研究过程中系统制冷剂充注量就不能借用已有的经验公式。针对自行研究设计的双源一体热泵R134a制冷剂充注量问题，采用Tandon空泡系数计算模型，借助于Maple应用数学软件，推导出系统在最佳设计工况下的制冷剂充注量。实验结果显示，该方法得到的数据与实际最佳制冷剂充注量基本吻合。并总结推导出适用于本类型双源一体热泵的制冷剂充注量估算公式。