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.

这项研究的目的是发现新的制冷剂可以取代R-22，这是一种用于空调系统的工作流体，并揭示了新制冷剂的热力学特性。以下是从1991年至1995年进行的这项研究的结果，这在26篇学术期刊的论文中得到了报道。1。关于R-32，测量了Pvt螺旋体，蒸气压，饱和液体的密度，特定的热量和声音速度。2。关于R-125，测量了PVT螺旋体，蒸气压，饱和液体的密度，特定的热量和声音速度。3。关于R-134a，根据高纯度样品流体的测量值重新确定了临界参数，还测量了气态R-134A中的声音速度。4。关于R-143A，蒸气压，饱和液体的密度和气态相中的PVT特性。5。关于制冷剂混合物，在广泛的范围内测量了气态R-32/125，R-32/134A的PVT特性，并测量了R-32/125，R-32的气泡点和气泡点的气泡点和密度/134A，R-125/143A和R-32/125/134A.6。基于上述测量值，确定了R-32/125和125/143A的共旋转组合物，由理想的GAS特异性加热值源自响应速度测量值，并使用理想确定混合物的组成。 -gas特异性加热值7。正在开发状态的热力学方程，并在1996年4月举行的学术会议上介绍了新制冷剂的热力学特征。

项目成果

Sato, T., Kiyoura, H., Sato, H., and Watanabe, K.: "Measurements of PVTx properties of refrigerant mixture HFC-32+HFC-125 in gaseous phase" Int.J.Thermophysics (presented at the 12th Symp.on Thermophys.Prop., Boulder). Vol.17, No.1. 43-54 (1996)

Sato, T.、Kiyoura, H.、Sato, H. 和 Watanabe, K.：“测量气相制冷剂混合物 HFC-32 HFC-125 的 PVTx 特性” Int.J.Thermophysicals（在第 12 届 Symp 上发表）

Widiatom, J.V., Sato, H., and Watanabe.K.: "Measurements of liquid densities of the binary HFC-32+HFC-134a system" Fluid Phase Equilibria. Vol.99. 199-207 (1994)

Widiatom, J.V.、Sato, H. 和 Watanabe.K.：“二元 HFC-32 HFC-134a 系统的液体密度测量”流体相平衡。

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。