A31 WS-2 Trends in Development of Heat Exchangers 1 09:00 〜 10:40Chairperson: OKUMURA Takuya (Panasonoc HVAC＆CC Corporation) |
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| A311 |
Activity Report II of the Research Project “Advanced Heat Exchanger Technology for the Adjustment to Carbon Neutrality"
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| A312 |
Study on a Flat-Tube Evaporator for Household Refrigerators
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| A313 |
Optimization of refrigerant circuitry of fin-and-tube heat exchangers
Development of a novel method considering manufacturability constraints |
| A314 |
Development of a Vertical Header for Side-Flow Outdoor Units
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| A315 |
Visualization Experiments and CFD Analysis of Two-Phase Refrigerant Flow Phenomena in Loop-Type Heat Exchanger Headers
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A32 WS-2 Trends in Development of Heat Exchangers 2 11:00 〜 12:20Chairperson: TSUNODA Isao (Shizuoka University) |
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| A321 |
【Keynote】The Role of Latent Heat Treatment in Thermal and Air Environments of Buildings for Decarbonization
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| A322 |
Evaluation of Condensation Performance in a Microchannel Heat Exchanger with Corrugated Channels
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| A323 |
Experimental Study on Performance Characteristics of R454C for Heat Exchangers and Air Conditioning Units
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A33 WS-2 Trends in Development of Heat Exchangers 3 13:20 〜 14:20Chairperson: SUZUKI Hideaki (Carrier Japan Corporation) |
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| A331 |
Development of an Outside Heat Exchanger to Extend the Driving Range of Battery Electric Vehicles
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| A332 |
Evaluation of Ventilation Thermal Load for Window Defogging in Electric Vehicles
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| A333 |
Improved Drainage Performance of Micro-channel Heat Exchanger with Hydrophilic Pre-coated Brazing fins
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A34 OS-1 & IS Joint Session 1 14:40 〜 16:40Chairperson: HIROKAWA Tomoki (University of Hyogo) |
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| A341 |
Dual-Pitch Helical Wire Array for Pool Boiling Heat Transfer
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| A342 |
Characterization of top surface wettability effect on bubble dynamics and flow boiling heat transfer within microchannels
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| A343 |
Research on Refrigerant Noise in Household Air Conditioners Based on System Dynamic Changes
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| A344 |
Passive Thermal Regulation of PV Modules via Gravity-Assisted Capillary Evaporation in High-Porosity Burlap Under High-Humidity Subtropical Conditions
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| A345 |
Radiative Cooling Applications for a Data Center
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| A346 |
Thermal-Hydraulic Performance of a TPMS Heat Exchanger under Flow Condensation
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B31 OS-8 Present Status and Future Development of Compressors 2 09:00 〜 10:40Chairperson: TOJO Kenji (WASEDA University/TOJO R&D Office) |
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| B311 |
【Keynote】Property measurements of refrigeration oil/refrigerant mixture
for better understanding of refrigerant compressors |
| B312 |
Analysis of Trajectories of Crankshaft and Crankpin Centers Due to Oil Film Pressure between Scroll Wraps (Effect of Initial Gap between Scroll Wraps)
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| B313 |
Dissolution Behavior of Refrigerant at the Oil Interface under Increasing Pressure
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| B314 |
Evaluation of a New PVE Refrigeration Lubricant for the Next-Generation Refrigerant R474B
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B32 OS-8 Present Status and Future Development of Compressors 3 11:00 〜 12:40Chairperson: CHIKANO Masatsugu (Hitachi, Ltd.) |
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| B321 |
Experimental Evaluation of Lubricating Oil Backflow at a Branch Section of Low-Pressure Pipe in an Automotive Refrigeration Cycle
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| B322 |
Flow Phenomenon Analysis Inside an Air-Conditioning Compressor Using Large-Scale High-Resolution Simulation
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| B323 |
Large-Scale Multiphase Flow Simulation of the Oil Discharge Process in an Air-Conditioning Compressor
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| B324 |
Fundamental study on an optical measurement technique for flow rate of lubricant droplets in a discharge pipe of air-conditioning compressor
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| B325 |
Finite Element Simulation-Based Fracture Failure Analysis and Optimization Design of Compressor
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C31 OS-5 Next Generation Refrigeration System Technology 1 09:00 〜 10:40Chairperson: ZHANG Li (CRIEPI) |
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| C311 |
Study on consideration of direct expansion system for environmental laboratory
9th Report: CFD Analysis Model for Predicting Outlet Temperature Distribution of an Evaporator(2) |
| C312 |
Miscibility of Refrigeration Oil with Low GWP Refrigerants
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| C313 |
Performance Evaluation of a Condensing Unit Using Next-Generation Refrigerant R474B
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| C314 |
【Keynote】】Advances in Optical Quantum Sensing
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C32 OS-5 Next Generation Refrigeration System Technology 2 11:00 〜 12:20Chairperson: NUKAGA Haruki (Hitachi, Ltd.) |
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| C321 |
Prototype Development and Heating Performance Evaluation of an EV Air-Conditioning System Using a Desiccant-Coated Heat Exchanger
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| C322 |
Evaluation of Water Absorption and Evaporation Characteristics of a Desiccant-Coated Heat Exchanger and Its Application Potential
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| C323 |
Visualization and heating experiments of the evaporator in a natural-circulation evaporative cooling heat recovery system
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| C324 |
Strain Gauge-Based Non-Intrusive Pressure Estimation for Thermal Systems: A Comparative Study of Thin-Walled and Thick-Walled Approximations Model
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C33 OS-5 Next Generation Refrigeration System Technology 3 13:20 〜 14:40Chairperson: NAGATA Junichiro (Sanki Engineering Co.,Ltd) |
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| C331 |
Initiatives in Centrifugal Chillers for Data Centers
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| C332 |
Development of a Machine Learning Model for Predicting the Dynamic Behavior of Air Conditioners
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| C333 |
Simulation of leakage of mildly flammable refrigerants into a Store from Showcases
Part 2: Evaluation of Time-Space Product During Leakage |
| C334 |
Fundamental Properties of EC-NaI Slurry for The Realization of an Ionocaloric Refrigeration Cycle
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C34 OS-5 Next Generation Refrigeration System Technology 4 15:00 〜 16:00Chairperson: WATANABE Satoshi (Mitsubishi Heavy Industries Thermal Systems, Ltd.) |
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| C341 |
Experimental Investigation of an Open Cycle Steam Generating Heat Pump with Direct Steam Compression
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| C342 |
Development of a Liquid Refrigerant Amount Estimation Technology for Accumulators in Commercial Multi-Split Air Conditioning Systems
1st Report: Construction of a Physical Model for Liquid Level Height Estimation Using Superheat Difference and Experimental Verification |
| C343 |
Analysis of Internal Flow in Linear Expansion Valves and The Effect on Refrigerant Noise
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D31 WS-8 Current Applications of Natural Refrigerant Systems 1 09:00 〜 10:40Chairperson: FUKUDA Sho (Kyushu Sangyo University), MATSUMOTO Tomoya (Idemitsu Kosan Co., Ltd.) |
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| D311 |
Market Trends of Natural Refrigerants
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| D312 |
Visualization of refrigerant and oil flow in refrigeration systems
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| D313 |
Development of Refrigeration Oil for Refrigerant Leak Detection for Natural Refrigerants
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| D314 |
Development of immersion cooling fluid for AI data centers
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| D315 |
"Dear Cool," an air conditioning chiller with R290
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D32 WS-8 Current Applications of Natural Refrigerant Systems 2 11:00 〜 12:20Chairperson: MIYAOKA Yoichi (Waseda University) |
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| D321 |
【Panel Discussion】Recent Trends in Natural Refrigerant Technologies
Reports from GL2026 and HVAC&R JAPAN 2026 |
D33 WS-6 Current Status on the Research and Development of Alternative Refrigerants to R23 1 13:20 〜 15:00Chairperson: SHIMOSAKA Koh (ETAC Engineering co., Ltd.) |
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| D331 |
R485A: GWP<150, non-PFAS, Non-Flammable-as-Applied for Ultra-Low-Temperature Applications
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| D332 |
Performance prediction of cascade cycles using R1132a/CO₂/Ethylene as R23 replacement candidates for ultra-low temperature applications
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| D333 |
【Keynote】ULT-Refrigeration Technologies No7
Moisture control issues in the ULT-Refrigerating Cuircuits |
D34 WS-6 Current Status on the Research and Development of Alternative Refrigerants to R23 2 15:20 〜 16:40Chairperson: AKASAKA Ryo (Kyushu Sangyo University) |
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| D341 |
【Panel Discussion】
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E31 OS-9 Simulation and AI Technologies for Refrigeration, Air-conditioning and Heat Pumps 1 09:00 〜 10:40Chairperson: HAIKAWA Tomoyuki (Daikin Industries, LTD.) |
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| E311 |
Development of a digital twin simulator toward thermal energy management system in retail stores
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| E312 |
Dynamic Performance Evaluation of Air Conditioners Using a Variable Thermal Environment Model Room and Coupled Simulation of Air Conditioners and Buildings
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| E313 |
Development of an EnergyPlus-Coupled Testing Facility for Air Conditioning Field-test in the Laboratory
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| E314 |
A Building-Information-Independent Method for HVAC Thermal Load Estimation and Prediction Using Equivalent Thermal Disturbance
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| E315 |
Demand Response of an Individual Air-Conditioning System Based on Model Predictive Control
Potential Evaluation of Demand Response on Expected Activation Days |
E32 OS-9 Simulation and AI Technologies for Refrigeration, Air-conditioning and Heat Pumps 2 11:00 〜 12:20Chairperson: HIGASHIIUE Shinya (Mitsubishi Electric Corp.) |
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| E321 |
Demonstration of Thermal Comfort Maintenance and Energy-Saving Effects of Local Air Conditioning Using Coaxial Mist in a Casting Factory
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| E322 |
Simultaneous Thermal Comfort Maintenance and Energy Saving by Local Air Conditioning Superimposed with Evaporative Cooling in Extremely Hot Factories
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| E323 |
Estimation of Occupants' Latent Discomfort Based on Setpoint Temperature Adjustment Behavior Using a State-Space Model
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| E324 |
Achieving Both Energy Efficiency and Thermal Comfort with Cold-Climate Air Conditioners
（Report 6）Effect of Weather Conditions in Cold Regions on the Heating Performance of Air Conditioners |
E33 OS-9 Simulation and AI Technologies for Refrigeration, Air-conditioning and Heat Pumps 3 13:20 〜 14:40Chairperson: NONAKA Masayuki (Hitachi Global Life Solutions, Inc.) |
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|---|---|
| E331 |
Proposal of a Fault Diagnosis Method for Commercial Air Conditioning Systems Using an FTA-Integrated Large Language Model and Specific-Fault-Detection AI
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| E332 |
A Study on a Failure Diagnosis Method Based on the Operating State of an Outdoor Heat Exchanger in Simultaneous Heating and Cooling Multi Systems
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| E333 |
AI-Based Vibration Feature Analysis and Embedded Fault Diagnosis for Air Conditioning Systems
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| E334 |
Research on zone air conditioning systems for factories using air curtains
Optimization study of cold air containment effect using machine learning |
E34 OS-9 Simulation and AI Technologies for Refrigeration, Air-conditioning and Heat Pumps 4 15:00 〜 16:00Chairperson: YAMAGUCHI Seiichi (Waseda University) |
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|---|---|
| E341 |
Study on a Data-Driven Approach for Optimal Heat Exchanger Design
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| E342 |
Advanced AMR Simulation Using Self-Adaptive Physics-Informed Neural Networks
Optimization Search of Design Parameters via Autonomous Thermal-Fluid Simulator |
| E343 |
REAL-TIME PREDICTION OF ICE–WATER PHASE-CHANGE INTERFACE DYNAMICS USING TEMPORAL SIGNED DISTANCE FUNCTION-BASED DEEP LEARNING
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F31 OS-3 Heat and Mass Transfer in Solid-Liquid Phase Change 1 09:20 〜 10:40Chairperson: ASAOKA Tatsunori (Shinshu University) |
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|---|---|
| F311 |
Advanced Effective Utilization for Cold Heat of Waste Plastic Energy.
5th report: Experimental evaluation of ice making system driven by waste heat based on the advanced ice slurry. |
| F312 |
EFFECT OF SOLUTE CONCENTRATION AND TYPE ON THE FLOW CHARACTERISTICS OF ICE SLURRY IN A HORIZONTAL CIRCULAR PIPE
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| F313 |
The seasonal heat storage system by 24℃ phase change material
Third report - Investigation of seasonal variation in radiative cooling |
| F314 |
Preparation of thermal energy storage microcapsule with a melting point higher than 100 ºC using O/W emulsion of stearic acid
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F32 OS-3 & 4 Joint session 1 11:00 〜 12:20Chairperson: YAMADA Yutaka (Okayama University), HATTORI Akihiro (The University of Tokyo) |
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|---|---|
| F321 |
【Keynote】Structure of vapor-deposited ice (H2O) through three-step transformation at 120 K
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| F322 |
Measurement of the rate of change in the basal plane orientation of ice crystals growing on a solid surface.
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| F323 |
COP Evaluation of an Absorption Ice Slurry Generator Based on Vapor Pressure Measurements of a Water–LiBr–PG Solution
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F33 OS-4 Phenomena and Application Technology on Frost, Snow and Ice 1 13:20 〜 15:00Chairperson: MATSUMOTO Ryosuke (Kansai University) |
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|---|---|
| F331 |
A Study on Rapid Heating Recovery for Cold-Climate Heat Pumps
Effect of Optimizing Refrigerant Distribution During Defrosting |
| F332 |
Frost formation caused by the influx of moist air when opening and closing cold storage, and countermeasures against it
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| F333 |
Prediction of Frost Distributions in Fin-and-Tube Outdoor Heat Exchangers for Lorenz Cycle Heat Pumps
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| F334 |
Effect of Leading Edge on Frost Layer Growth Model
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| F335 |
Development of a Frosting CFD Method Incorporating Mist Generation in General Curvilinear Coordinates and Its Application to Frost Formation Prediction around a Low Temperature Cylinder
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F34 OS-4 Phenomena and Application Technology on Frost, Snow and Ice 2 15:20 〜 16:40Chairperson: HATTORI Akihiro (The University of Tokyo) |
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|---|---|
| F341 |
Classification and Development of Frost Crystal Morphologies
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| F342 |
Frost Growth Model Considering the Temperature Dependence of Tip Frost Density and X-ray CT Characterization of Internal Structure
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| F343 |
Study of frost shape measurement on a cylinder using the light-section method
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| F344 |
Experimental PIV Measurement of the Flow Field Around a Cooled Cylinder Under Frosting Conditions
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