Development of Equations of State for Next-generation Refrigerants Using a Multi-fluid Optimization

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05849
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Kyushu Sangyo University
• Principal Investigator: Akasaka Ryo 九州産業大学, 理工学部, 教授 (60369121)
• Co-Investigator(Kenkyū-buntansha): 東 之弘 九州大学, カーボンニュートラル・エネルギー国際研究所, 教授 (90183095)
• Research Collaborator: McLinden Mark O. 米国標準技術研究所(NIST) ; Lemmon Eric W. 米国標準技術研究所(NIST)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 状態方程式 / 冷媒 / 飽和蒸気圧 / 密度 / 音速

Outline of Final Research Achievements

In this work, we established a generalized functional form of the Helmholtz energy equations of state using a multi-fluid optimization. This functional form was applied to several HFO refrigerants, R-1123，R1224yd(Z)，R-1234ze(Z)，R-1243zf, and R-1336mzz(Z), and accurate equations of state for these refrigerants were obtained. The equations represent experimental data including vapor pressures, densities, and sound speeds within their uncertainties. In addition, the equations exhibit physically correct behavior over wide ranges of temperature and pressure. All equations will be available in the REFPROP version 10.

Free Research Field

熱工学