JAPAN: Mitsubishi Heavy Industries’ Q-ton Circulation air-to-water heat pump has won the Technological Development and Commercialisation category in this year’s Japanese Ministry of the Environment awards.
The Minister of the Environment for Climate Action Award recognised MHI’s development and promotion of the Q-ton Circulation, which MHI developed in conjunction with Chubu Electric Power Co.
The award was given in the Technological Development and Commercialisation category in recognition of the development and promotion of an air-source type heat pump using a refrigerant with a low global warming potential
Launched in 2018, the Q-ton Circulation was the industry’s first heat pump of its type capable of heating water to 75°C at an outside temperature as low as -20°C.
It employs R454C, an A2L lower flammability blend of R32 and 1234yf with a GWP of 148.
The Q-ton Circulation also adopts a two-stage compression refrigeration cycle using its proprietary high-efficiency 3D scroll compressor
The Ministry of the Environment accolade is the fourth award bestowed on the Q-ton Circulation. In 2019, the new heat pump received the 47th Technology Award from the Japan Society of Refrigerating and Air Conditioning Engineers (JSRAE). In 2021, it received the Excellence Award in the Refurbishment Equipment category of the 38th Excellent Energy Saving Equipment Awards of the Japan Association of Refrigeration and Air-Conditioning Contractors (JARAC), and also the Award for Excellence at the 24th Ozone Layer Protection and Global Warming Prevention Commendations sponsored by the Nikkan Kogyo Shimbun newspaper.