【摘要】 基于氟利昂制冷剂的ODP和GWP问题,运用热力学方法,分别对环境友好性的自然工质CO2和三种常规氟利昂制冷剂R22、R134a及R152a的比热、导热系数、表面张力等物性参数进行了对比,并对相应的循环性能进行了分析,为高效、节能的CO2跨临界循环热泵热水器的研究提供了基础资料。更多还原

【Abstract】 Based on growing awareness of dual threats of Freon refrigerant ozone depletion potential and global warming potential,the specific heat and surface tension of natural CO2 and three kinds of Freon refrigerant were employed.Performance comparison analysis of the CO2 transcritical cycle and Freon refrigerant cycle were also analyzed in this paper,and some fundamental data were obtained for developing CO2 heat pumps water heater with characteristic of high efficiency and energy conservation.更多还原