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Results

The day-to-day research achievements of our laboratory are highly regarded in academic journals and international conferences in Japan and abroad.

National Projects

National Research & Development Projects

PeriodProject NameProgram / Funding AgencyRole
FY2023–FY2027C2. Development and Standardization of Fundamental Technologies for Thermal Energy Management SystemsSIPPrincipal Investigator: Kiyoshi Saito
FY2018–FY2022Development of Next-Generation Refrigerant and Refrigeration/Air-Conditioning Technologies and Evaluation Methods for Achieving Energy Savings and Low Global Warming PotentialNEDOSPL: Kiyoshi Saito

Journal Papers

State-of-the-art of the digital twin concept in HVAC+R systems for thermal management of buildings
Nasiru I. Ibrahim, Christian Vering, Niccolò Giannetti, Moojoong Kim, Sholahudin, Thomas Storek, Dirk Müller, Kiyoshi Saito ／ Renewable and Sustainable Energy Reviews 229, 116601 ／ April 2026
DOI
Key Topological Features for Optimized Evaporator Circuitry with Enhanced Manufacturability
Cheol-Hwan Kim, Niccolo Giannetti, Chitose Tanaka, John Carlo S. Garcia, Yoichi Sei, Koji Enoki, Kiyoshi Saito ／ Case Studies in Thermal Engineering, 107612 ／ December 2025
DOI
Experimental validation of genetic programming for heat exchanger circuitry optimization
N. Giannetti, C.H. Kim, F. Della Santa, Y. Sei, K. Enoki, K. Saito ／ Applied Thermal Engineering, 129517 ／ December 2025
DOI
An Overview of the Development and Standardization of Fundamental Technologies for Thermal Energy Management Systems
Ryota Suzuki, Nasiru I. Ibrahim, Niccolo Giannetti, Kiyoshi Saito ／ Lecture Notes in Civil Engineering, 919-928 ／ November 2025
DOI
Void fraction of R32 in microfin tube under condensation conditions using capacitance-based sensor
Moojoong Kim, Kento Maeda, Kiyoshi Saito ／ Applied Thermal Engineering, 128693 ／ October 2025
DOI
Void fraction of R32 in microfin tube under evaporation conditions using capacitance-based sensor
Moojoong Kim, Kento Maeda, Tetsuya Sato, Kiyoshi Saito ／ Applied Thermal Engineering 265, 125569 ／ April 2025
DOI
Systematic development of multilayer-perceptron-based void fraction model
Cheol-Hwan Kim, Moojoong Kim, Sholahudin, Niccolo Giannetti, Kiyoshi Saito ／ International Communications in Heat and Mass Transfer 162, 108563 ／ March 2025
DOI
An aluminum finned-tube type internally-cooled deep dehumidifier using ionic liquid desiccant for low-humidity industries: Modelling and case study
Bowen Cao, Katsuya Masuno, Kento Maeda, Moojoong Kim, Xinming Wang, Yonggao Yin, Kiyoshi Saito ／ Energy Conversion and Management 327, 119598 ／ March 2025
DOI
Characteristics of heat and mass transfer in moist air-ionic liquid desiccant bubbly systems: Parametric assessment of regeneration performance
Bowen Cao, Yonggao Yin, Moojoong Kim, Kiyoshi Saito, Christos N. Markides, Xinming Wang ／ Applied Thermal Engineering 257, 124487 ／ December 2024
DOI
Measurement of void fraction of zeotropic refrigerant R454C using capacitance-based sensor in horizontal flow configuration
Moojoong Kim, Tetsuya Sato, Kiyoshi Saito ／ Applied Thermal Engineering 252, 123625 ／ September 2024
DOI

Awards

2023.04
Paper Award (Japan Society of Refrigerating and Air Conditioning Engineers)
2022.04
Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology, Research Category (MEXT)
2022.02
Waseda Research Award (Waseda University)
2021.02
Waseda Research Award (Waseda University)
2020.04
Waseda Research Award (Waseda University)

Media, Talks & Publications

Media Coverage & Talks
2026.07.16
Media
Professor Kiyoshi Saito explained the "2027 air conditioner problem" on NHK News "Ohayo Nippon"
2026.02
Lecture Video
Lecture video from JST public symposium released
We have released a video of Professor Saito's presentation on R&D theme C2, "Development and Standardization of Fundamental Technologies for Thermal Energy Management Systems," from the JST public symposium held in August 2025. The presentation reports on the challenges of controlling "heat" (EMS), which accounts for more than half of all energy consumption, and on efforts toward solving these challenges through "digital twin" technology.
2025.09
Media
Professor Saito appeared on TV Asahi's "Saturday Station"
In the September 20 broadcast of "Saturday Station," Professor Saito's expert views on natural refrigerants were aired. The program explained the environmental impact of air conditioner refrigerants and the current status and challenges of transitioning to natural refrigerants with low global warming potential.
Books & Publications
2024.05
Book
図解でわかる次世代ヒートポンプ技術：カーボンニュートラルを実現する冷温熱利用技術 [Illustrated Guide to Next-Generation Heat Pump Technology: Cooling and Heating Utilization Technologies for Achieving Carbon Neutrality]
Kiyoshi Saito (Dr. Eng.), Waseda University Next-Generation Heat Pump Technology Strategic Research Consortium ／ Gijutsu-Hyoronsha ／ ISBN: 9784297140519
2023.03
Book
熱駆動サイクル技術の基礎と応用－カーボンニュートラル社会に貢献する冷凍空調技術 [Fundamentals and Applications of Heat-Driven Cycle Technology: Refrigeration and Air-Conditioning Technologies Contributing to a Carbon-Neutral Society]
Role: Co-author ／ Nihon Kogyo Shuppan ／ ISBN: 9784819035057