中文摘要：

基于氟利昂制冷剂的ODP（臭氧层破坏势）和GWP（温室效应）问题,运用热力学方法,对CO2跨临界双级压缩带回热器循环TSCV＋TGC＋IHX与不带回热器循环TSCV＋TGC建立了数学模型,并基于Visual Basic程序基础,开发了两种双级循环性能分析平台。结果表明,相同对比条件下,循环TSCV＋TGC＋IHX平均性能比循环TSCV＋TGC高5%～10%,最优中间压力比循环TSCV＋TGC低约5%～15%。本研究为高效、节能的CO2跨临界循环热泵热水器产品的开发提供了基础资料。

英文摘要：

To address the ODP（Ozone Depletion Potential） and GWP（Global Warming Potential） problems arisen from freon refrigeration coolant,mathematical models were established for CO2 trans-critical dual-stage compression cycle with a recuperator（TSCV＋TGC＋IHX） and without a recuperator（TSCV＋TGC） by employing a thermodynamic method.In addition,based on Visual Basic program,a platform for analyzing the performance of both cycles was developed.It has been found that under the identical contrast conditions,the average performance of TSCV＋TGC＋IHX is 5%~10% higher than that of TSCV＋TGC and the optimum intermediate pressure of TSCV＋TGC＋IHX is about 5%~15% lower than that of TSCV＋TGC.The research findings can serve as basic data for development of high efficiency and energy-saving CO2 heat pump hot water heater products operating in trans-critical cycles.