Air_-_A_Natural_Refrigerant_Information_paper_2026.pdf
Air refrigeration systems use ambient air as the refrigerant, offering a natural and environmentally friendly cooling solution. With growing environmental awareness and regulations such as the EU F-Gas Regulation, air cycle refrigeration technology is gaining increasing relevance. Air neither depletes the ozone layer nor contributes to global warming, making it a future-proof alternative to conventional refrigerants. An additional advantage is its unlimited availability. Air cycle machines present an effective solution for ultra-low-temperature applications from −40 °C to −160 °C. The machines, characterized by their efficient and wear-free turbo technology, demonstrate notable advantages in terms of energy efficiency, reliability, future viability, and safety. Practical applications include freeze-drying processes, which have demonstrated potential energy savings of up to 19% compared to traditional refrigerants like R404A. Air cycle refrigeration has also been successfully employed in cold room applications, providing efficient cooling with-out moisture-related problems due to innovative dehumidification systems. Air refrigeration systems thus offer considerable environmental, operational, and economic benefits for industries requiring low-temperature refrigeration. The versatility of air refrigeration provides advantages such as high operational safety, environ-mental friendliness, and cost efficiency, particularly in highly regulated environments.
Source:Air as a natural refrigerant - Green Cooling Initiative
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