Technical Note
Technical Trend-Portable Air Conditioners
Stationary and Portable ACs Air conditioners consist of centralized air conditioning types such as chillers and unitary systems, types with the combined features of centralized air conditioning and i...
Air Conditioning and Heatstroke/Heat Shock Response
Sei Suma, senior advisor, Japan Air Conditioning, Heating and Refrigeration News (JARN) During the last week of June this year, about 15,000 people in Japan were transported to medical facili...
Data Center Cooling
What is a data center? In recent years, data center has become a more familiar term to the general public than ever before. But it seems that not many people understand the exact role of a data cente...
Climate, Houses, and Air Conditioning — AC Requirements Vary
Sei Suma, senior advisor, Japan Air Conditioning, Heating and Refrigeration News (JARN) About 120 million air conditioners were sold worldwide in 2020. Sales more than tripled during the period spa...
CR 2021 Technical Report - Heat Pumps
Reported by Prof. Jiang Yiqiang, Prof. Dong Jiankai, and Dr. Zheng Wenke of Harbin Institute of Technology Many well-known heat pump brands, including Gree, Midea, Haier, TICA, Phnix, and McQuay, t...
CR 2021 Technical Report – Chillers
Reported by Associate Professor Xu Rongji and Dr. Wang Gang of Beijing University of Civil Engineering and Architecture At China Refrigeration Expo 2021 (CR 2021), Chinese brands displayed types of...
JRAIA Clarifies Its Stance on Reviewed GWPs in AR6
On August 9, 2021, the ‘Climate Change 2021: The Physical Science Basis’ was published by the Working Group I contribution to the Sixth Assessment Report (AR6) of the Intergovernmental Pan...
Preventing Refrigerant Leakage Is Not Easy
Sei Suma, senior advisor, Japan Air Conditioning, Heating and Refrigeration News (JARN) Efforts to prevent global warming involve major challenges in the heating, ventilation, air conditioning, and...
Uncertain Resolution of Semiconductor Shortage — AC Industry
The semiconductor shortage that spread globally in 2021 due to the influence of the pandemic has not yet shown signs of being resolved in 2022. There is a view within the semiconductor industry that t...
Musings on HVAC&R — Various Advantages of Ventilation
Sei Suma, senior advisor, Japan Air Conditioning, Heating and Refrigeration News (JARN) Ventilation is the exchange of the inside and outside air of buildings and reduces the concentration of...
CR 2021 Technical Reports - RACs & VRFs
Reported by Associate Professor Wang Baolong and Wang Cuiling of Tsinghua University; Associate Professor Zhang Penglei, Yang Xiaorui, and Li Yue of Nanjing University of Aeronautics and Astronautics ...
Commercialization of Optimal Coupled Control System of Light
An optimal coupled control system of lighting/air conditioning utilizing the hue-heat effect will be commercialized in Japan from 2022. The hue-heat effect is an effect that enables people to perce...
