CAJ | 학술논문

基于PR状态方程，分模块模拟计算了三级自动复叠制冷系统中R134a/R23/R14三元混合工质的热物理特性参数，得到非共沸混合工质的汽液平衡数据、两相组分，并利用干度计算焓熵值，构建了典型配比下混合工质的压焓图和汽液相平衡图。二元R134a/R23和R32/R134a混合工质的泡点压力和气相组分的计算值与实验测试值的误差分别小于1.3%、1.2%和1.0%、2.4%；三元R32/R125/R134a混合工质95%的计算值与实验值的偏差在±5%之内，表明该模型能满足工程计算需要。利用理论模型，结合实验系统，对R134a/R23/R14三级自动复叠制冷系统进行详细的组分等热物性分析，并在空间压焓图上进行了详细表述。
기우PR상태방정，분모괴모의계산료삼급자동복첩제랭계통중R134a/R23/R14삼원혼합공질적열물리특성삼수，득도비공비혼합공질적기액평형수거、량상조분，병이용간도계산함적치，구건료전형배비하혼합공질적압함도화기액상평형도。이원R134a/R23화R32/R134a혼합공질적포점압력화기상조분적계산치여실험측시치적오차분별소우1.3%、1.2%화1.0%、2.4%；삼원R32/R125/R134a혼합공질95%적계산치여실험치적편차재±5%지내，표명해모형능만족공정계산수요。이용이론모형，결합실험계통，대R134a/R23/R14삼급자동복첩제랭계통진행상세적조분등열물성분석，병재공간압함도상진행료상세표술。
The thermodynamic properties of R134a/R23/R14 ternary mixtures used in three-stage auto-cascade refrigeration systems were calculated based on the PR equation, and enthalpy and entropy were calculated by using dryness. The diagrams of pressure-enthalpy and VLE of R134a/R23/R14 mixture under the typical composition were given. The deviations of bubble pressure and vapor composition between simulation results and the experimental data were less than 1.3%and 1.2%for R134a/R23, 1.0%and 2.4%for R32/R134a, respectively. The deviations of 95%calculated values of R32/R125/R134a were between ±5%. The simulation results could meet the requirements of engineering calculation. Based on the experiment, the thermodynamic properties of the auto-cascade refrigeration system were analyzed in detail. The pressure-enthalpy diagrams of R134a/R23, R23/R14 and R134a/R23/R14 under the operating compositions were given, and the diagram of spatial pressure-enthalpy described the circle of this system clearly. This simulation program could analyze the system circle effectively.