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Next-Generation Refrigerant Property Evaluation Lab (Yasuyuki Takata)
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A research center that evaluates the thermophysical properties of next-generation refrigerants through domestic and international collaboration.
AboutAbout the lab
Investigating next-generation refrigerants through domestic and international collaboration
The Research Center for Next-Generation Refrigerant Properties (NEXT-RP) is a research institution that evaluates the thermophysical properties, heat transfer characteristics, and cycle system performance of refrigerants for future use.
It was established in April 2016 within the International Institute for Carbon-Neutral Energy Research (I²CNER) at Kyushu University.
Rather than doing all of its work at Kyushu University alone, it works in collaboration with research institutions in Japan and around the world.
It conducts fundamental research on new refrigerants that do not deplete the ozone layer and have a low global warming potential (GWP).
Key terms
- Refrigerant
- A substance used as the working fluid that carries heat in refrigerators and heat pumps. It is essential for refrigeration and air conditioning
- GWP
- Global warming potential. An index of the magnitude of an impact on global warming; refrigerants with a high value are a concern for their adverse effect on warming
- Equation of state
- A formula that expresses the thermodynamic properties of a refrigerant
NewsLab news
Project Professor Yukihiro Higashi receives the Distinguished Service Award from the Japan Society of Thermophysical Properties, and Professor Naoya Sakoda receives its Contribution Award
Specially Appointed Professor Yasuyuki Takata receives the Heat Transfer Memorial Award-Science from the American Society of Mechanical Engineers
A master's student receives the President's Encouragement Award from the Japan Society of Refrigerating and Air Conditioning Engineers
A doctoral student receives an Outstanding Presentation Award at the annual conference of the Japan Society of Refrigerating and Air Conditioning Engineers
ResearchResearch themes
The center conducts fundamental research on the thermophysical properties, heat exchange characteristics, and basic cycle performance of new refrigerants with zero ODP (ozone depletion potential) and low GWP. As an organization that collaborates not only with labs at Kyushu University but also with universities and national research institutes in Japan and abroad, it carries out multifaceted evaluation of thermophysical properties, heat transfer, and system performance.
*Illustrative imagePrecise Measurement of Refrigerant Thermodynamic Properties
At Kyushu University's Ito Campus, the thermodynamic properties of pure and mixed refrigerants are measured precisely. Equipment is in operation for measuring PVT properties by the constant-volume method and the Burnett method, and for measuring vapor-liquid equilibrium properties by the circulation method.
*Illustrative imageTransport Properties and Heat Transfer in Heat Exchangers
At Saga University, the viscosity and thermal conductivity of pure and mixed refrigerants are measured. The work also includes measuring boiling and condensation heat transfer in plate heat exchangers and observing gas-liquid two-phase flow.
*Illustrative imageDeveloping Equations of State for Refrigerants
At Kyushu Sangyo University, highly accurate equations of state for pure refrigerants and mixing models for refrigerant mixtures are developed. The validity of the measured thermophysical and transport properties is also verified.
*Illustrative imageSurface Tension, Freezing Point, and Molecular Simulation
At Nagasaki University, the surface tension and freezing points of new low-GWP refrigerants are measured, and heat transfer and pressure drop in helically grooved tubes are evaluated. Molecular simulation was introduced to predict properties in low-temperature ranges where measurement is difficult.
MembersFaculty
The members of the Research Center for Next-Generation Refrigerant Properties consist of the center director (Specially Appointed Professor), Project Professors, Professors, Visiting Professors, and cooperating members.As of 2025
- Center Director and Specially Appointed ProfessorYasuyuki Takata
- Project ProfessorYukihiro Higashi
- ProfessorKyaw Thu
- ProfessorTakahiko Miyazaki
- ProfessorNaoya Sakoda
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Refrigerants-CoolCraft” Лобачев Владимир / CC BY-SA 4.0 (cropped)
- Precise Measurement of Refrigerant Thermodynamic Properties: “Refrigerant Fluids ( )” National Institute of Standards and Technology / Public domain (cropped)
- Transport Properties and Heat Transfer in Heat Exchangers: “Tube bundle of a shell & tube heat exchanger (before assembly)” Harald the Bard / CC BY-SA 4.0 (cropped)
- Developing Equations of State for Refrigerants: “RTO WITH HEAT RECOVERY” Echo-technology / CC BY-SA 4.0 (cropped)
- Surface Tension, Freezing Point, and Molecular Simulation: “Napięcie powierzchniowe wody surface tension of water” Hede04 / CC BY 4.0 (cropped)
- Related lab (〈次世代冷媒物性評価〉): “DAIKIN AIR CONDITIONER OUTDOOR UNIT (23)” Dinkun Chen / CC BY-SA 4.0 (cropped)
- Related lab (〈物質変換科学〉): “1950 - Lehigh Valley Structural Steel at night - Allentown PA” Self-Scanned / Public domain (cropped)
- Related lab (〈カーボンニュートラル化学〉): “Diagram-of-Bioenergie power plant without carbon capture and storage (cropped)” Daniel L. Sanchez, Daniel M. Kammen / CC BY 4.0 (cropped)
- Related lab (カーボンニュートラル化学
（岡崎 信也） ): “Direct Air Capture” StevenGandhi / CC BY 4.0 (cropped)
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