A Study of Thermodynamic Properties of Next Generation Mixture Refrigerants Including Hydrocarbons

下一代含碳氢化合物混合制冷剂的热力学性质研究

• 批准号: 12450090
• 负责人: WATANABE Koichi
• 金额: $ 9.54万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450090/
• 关键词: Environmentally Friendly Refrigerant; Natural Refrigerant; Hydrocarbon; Alternative Refrigerant; PVTx Property; Vapor Pressure; Thermodynamic Property; Equation of State

A series of precise measurements of vapor pressures and gas-phase PVT properties of isobutene (R-600a), a hydrocarbon refrigerant, being an important component of the next generation mixture refrigerants with low environmental impact have been conducted by means of the improved Burnett apparatus, since reliable thermodynamic property information about this substance were not available. Sixteen vapor pressure data at temperatures 300-370 K have been obtained, while 48 gas-phase PVT data at 300-380 K. In addition, 9 vapor-pressure data at temperatures down to 260 K were recently obtained, whereas the measurement of temperature dependence of the cell constant of this apparatus is in progress.A density-measuring system with an aid of the vibrating-tube densimeter was newly designed and constructed, and it was then confirmed that the measurement system could provide us a satisfactory performance with rapid and precise measurements as expected. Measurements for pure water, methanol and 3 dif … More ferent MFC alternative refrigerants such as R-134a, R-125 and R-143a have been completed throughout the present research project. Additionally, similar precise density measurements have been carried out for compressed-liquid phases of HFE-245mc and HFE-143m, promising alternative candidates recently developed as next generation refrigerants, as well as for those or natural hydrocarbon refrigerants including propane (R-290) and R-600a.Concerning the analytical studies, on the other hand, a series of thermodynamic properly model with the Helmholtz-energy type equation of state which is effective for the entire fluid phase of typical natural refrigerants including R-290, R-600a and n-butane (R-600), have been developed with a universal functional form. These models developed have been published in one of the leading international journals. A significant success has also been confirmed in developing the mixing rule which does play an important role to formulate the thermodynamic property models for hydrocarbon (HC) mixtures so as to lead to those for the HC + HFC refrigerant mixtures.It should be noted that the thermodynamic property models developed by the present study for 3 HCs mentioned above have been accepted with international qualification for their forthcoming inclusion to the next version of the REFPROP, a thermodynamic property package developed by the U.S. National Institute of Standards and Technology (NIST) and being widely used on the international basis. Less

由于缺乏可靠的热力学性质资料，采用改进的Burnett装置对下一代低环境影响混合制冷剂的重要组分异丁烯（R-600 a）的蒸气压和气相PVT性质进行了一系列精确测量。获得了300-370 K的16个蒸气压数据和300-380 K的48个气相PVT数据。此外，还获得了9个260 K以下的蒸气压数据，并对该装置的晶胞常数随温度的变化关系进行了测量。设计并搭建了一套振动管密度计密度测量系统，证实了该测量系统的快速性和准确性。纯水、甲醇和3dif的测量 ...更多信息 在整个研究项目中，已经完成了R-134 a、R-125和R-143 a等MFC替代制冷剂的开发。此外，已经对HFE-245 mc和HFE-143 m的压缩液相进行了类似的精确密度测量，HFE-245 mc和HFE-143 m是最近开发的作为下一代制冷剂的有希望的替代候选物，以及包括丙烷（R-290）和R-600 a的那些或天然烃制冷剂。建立了适用于R-290、R-600 a和正丁烷（R-600）等典型天然制冷剂全流体相的Helmholtz能量型状态方程的热力学模型，并给出了通用函数形式。这些模型已发表在一个领先的国际期刊上。混合规则的发展也取得了显著的成功，该规则在制定碳氢化合物（HC）混合物的热力学性质模型方面发挥了重要作用，从而导致了HC +的热力学性质模型应注意的是，本研究为上述3种碳氢化合物开发的热力学性质模型已被国际认可，并将被纳入REFPROP的下一个版本，由美国国家标准与技术研究所（NIST）开发的热力学性质包，并在国际上广泛使用。少

项目成果

Miyamoto, H., Watanabe, K.: "A Thermodynamic Equation of State for Fluid-Phase iso-Butane"to appear in the International Journal of Thermophysics. 23・2(In Press). (2002)

Miyamoto, H., Watanabe, K.：“流体相异丁烷的热力学状态方程”发表于《国际热物理学杂志》23・2（出版中）。

Kayukawa, Y., Watanabe, K.: "Pp Tx Measurements for Gas-Phase Pentafluoroethane + Propane Mixtures by the Burnett Method"Journal of Chemical and Engineering Data. 46・5. 1025-1030 (2001)

Kayukawa, Y., Watanabe, K.：“通过伯内特法测量气相五氟乙烷 + 丙烷混合物的 Pp Tx”，化学与工程数据杂志 46・5（2001 年）。

Miyamoto, H., Watanabe, K.: "A Thermodynamic Property Model for Fluid-Phase Propane"International Journal of Thermophysics. 21・5. 1045-1072 (2000)

Miyamoto, H., Watanabe, K.：“流体相丙烷的热力学性质模型”国际热物理学杂志 21・5 (2000)。

Kayukawa, Y., Watanabe, K.: "PpTx Measurements for Gas-Phase Pentafluoroethane + Propane Mixtures by the Burnett Method"to appear in the Journal of Chemical and Engineering Data. 46・5. 1025-1030 (2001)

Kayukawa, Y., Watanabe, K.：“通过伯内特法测量气相五氟乙烷 + 丙烷混合物的 PpTx”，发表于《化学与工程数据杂志》46・5 (2001)。

Kayukawa, Y. and Watanabe, K.: "PρTx Measurements for Gas-Phase Pentafluoroethane + Propane Mixture"J. Chem. Eng. Data. 46-5. 1025-1030 (2001)

Kayukawa, Y. 和 Watanabe, K.：“气相五氟乙烷 + 丙烷混合物的 PρTx 测量”J. Chem. 1025-1030。