Mitsubishi Heavy Industries Air-Conditioning & Refrigeration Corporation (MHI-AC&R), part of the Mitsubishi Heavy Industries Group, has announced the development of N-Bleath, a compact brine chiller utilizing nitrogen as a natural refrigerant. The product, which is set to hit the market in April 2027, aims to address environmental concerns with its zero ozone depletion potential (ODP) and global warming potential (GWP).
The N-Bleath chiller is designed to manage ultra-low temperature ranges, from -40°C to -100°C, making it suitable for diverse applications in sectors such as medical, pharmaceutical, chemical, and semiconductor industries. The unit's compact and modular design offers space-saving benefits and improved backup capabilities, reducing installation constraints and equipment downtime risks.
Key to its innovation is the integration of a newly developed compact electric turbo from Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (MHIET). This component enables the chiller to achieve high efficiency and miniaturization. The electric turbo combines a high-performance impeller with an ultra-high speed motor, leveraging aerodynamic performance and high-speed rotation technologies.
By using nitrogen as a refrigerant, the N-Bleath chiller avoids the use of PFAS, reducing environmental impacts and health risks. Additionally, the unit is not subject to regulations such as Japan's High Pressure Gas Safety Act, simplifying maintenance and operation.
MHIET's electric turbo is designed to be oil-free, eliminating the need for periodic lubricating oil changes and further reducing maintenance requirements. The turbo's advanced thermal insulation allows it to cool to temperatures below -100°C, enhancing its performance in ultra-low temperature applications.
MHI Group plans to promote the adoption of cooling systems that use PFAS-free natural refrigerants with zero ODP and GWP. By supplying compact electric turbos with high energy-saving performance, the company aims to contribute to the reduction of environmental impacts in the ultra-low temperature market.
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