流动型量热法测量液体比热容实验研究

Measurement Device for Heat Capacities of HFC152a/HCFC22 Liquid Mixture

建立了流动型高压液体及其混合物定压比热容的测量装置．该装置测量压力可达１２ＭＰａ，温度范围为２６０～４７０Ｋ．利用所建的装置测量了纯水的定压比热容，测量结果与文献值比较其偏差在±０．６％以内．该装置的建成为进一步开展液体及其混合物定压比热容的研究创造了条件．文中给出了利用该装置测量ＨＦＣ１５２ａ／ＨＣＦＣ２２混合工质定压比热容的测量结果．

A measurement device is prsented for the heat capacities of liquid mixtures at a pressure of up to 12 MPa and temperature of 260 K to 470 K. The relative uncertainty is 0.6% for water when compared with the open literature value of heat capacities. The specific heat capacities of HFC152a/HCFC22(85%/15% mass) mixture in liquid used in the refrigerator as an alternative for CFC12 are determined by the device.