Thermodynamic study on working fluids for advanced air-conditioning systems

先进空调系统工质的热力学研究

• 批准号: 04402025
• 负责人: WATANABE Koichi
• 金额: $ 17.66万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04402025/
• 关键词: alternative refrigerants; refrigerants; refrigeration cycle; thermodynamic properties; thermophysical properties; theromodynamics; air-conditioning; global environment; ヒートポンプ; ペンタフルオロエタン; ジフルオロメタン; 作動流体; 冷凍; 混合冷媒; HFC-32

The objective of this study is to find the new refrigerants wich can replace R-22, a present working fluid for air-conditioning systems, and to reveal the thermodynamic properties of the new refrigerants. The followings are the results fo this study through 1991 to 1995, which have been reported in 26 papers of academic journals.1. Regarding R-32, the PVT-properties, vapor pressures, densities of saturated liquid, specific heats, and the speed of sound were measured.2. Regarding R-125, the PVT-properties, vapor pressures, densities of saturated liquid, specific heats, and the speed of sound were measured.3. Regarding R-134a, the critical parameters were redetermined on the basis of the measurements with high purity sample fluids and the speed of sound in gaseous R-134a was also measured.4. Regarding R-143a, vapor pressures, densities of saturated liquid and the PVT properties in the gaseous phase were measured.5. Regarding refrigerant mixtures, the PVT properties of gaseous R-32/125, R-32/134a were measured in the extensive range and the bubble-point ressures and the densities at bubble point were measured for R-32/125, R-32/134a, R-125/143a, and R-32/125/134a.6. Based on the above measurements, the azeotropic compositions of R-32/125 and 125/143a were determined, ideal-gas-specific-heat values were derived from speed-of-sound measurements, and the compositions of mixtures were determined using the ideal-gas-specific-heat values.7. The thermodynamic equations of state are being developed and the thermodynamic characteristics of new refrigerants are being studied wich will be presented at the academic meeting to be held in April 1996.

本研究的目的是寻找可以替代目前空调系统工作流体R-22的新制冷剂，并揭示新制冷剂的热力学性质。以下是本研究在1991 - 1995年间的研究结果，在学术期刊上发表了26篇论文。测量了R-32的pvt性能、蒸汽压、饱和液体密度、比热和声速。对R-125进行了pvt性能、蒸汽压、饱和液体密度、比热和声速的测量。对于R-134a，在高纯度样品流体测量的基础上，重新确定了关键参数，并测量了R-134a气体中的声速。对R-143a进行了蒸汽压、饱和液体密度和气相PVT性能的测量。对于制冷剂混合物，在大范围内测量了气态R-32/125、R-32/134a的PVT特性，并测量了R-32/125、R-32/134a、R-125/143a和R-32/125/134a a.6的泡点压力和泡点密度。在上述测量的基础上，确定了R-32/125和125/143a的共沸组分，通过声速测量得到了理想气体比热值，并用理想气体比热值确定了混合物的组分。目前正在拟订热力学状态方程，并正在研究新制冷剂的热力学特性，这些将在1996年4月举行的学术会议上提出。

项目成果

西村 敦夫: "HFC-32の気相域および飽和状態における熱力学性質" 第13回日本熱物性シンポジウム講演論文集. 57-60 (1992)

Atsuo Nishimura：“HFC-32在气相区和饱和状态下的热力学性质”第13届日本热物理性质研讨会论文集57-60（1992年）。

Widiatmo,J. V.: "Evaluation of thermodynamic properties of alternative binary mixtures including R-32, R-125 and R-134a refrigerants" "Built Environment, Trends and Chellenges," Proc. of the Asia-Pacific Conf. on Built Environment. 1. 253-260 (1995)

维迪亚特莫，J.

Widiatmo,J. V.: "Bubble-point pressures and liquid densities of binary HFC-125 + HFC-143a system" Int. J. Thermophysics. 16. 801-810 (1995)

维迪亚特莫，J.

Widiatmo,J. V.: "Experimental thermodynamic properties of alternative mixtures including R-32, R-125 and R-134a refrigerants" Proc. of the 19th Int. Congress of Refrig., 20-25 August 1995. IVa. 614-621 (1995)

维迪亚特莫，J.

Kuwabara,S.: "Measurements of the vapor-liquid coexistence curve in the critical region and the critical parameters for several alternative refrigerants" High Temperatures-High Pressures. 26. 35-40 (1994)

Kuwabara,S.：“临界区域汽液共存曲线的测量以及几种替代制冷剂的临界参数”高温高压。