At the two-day UNIDO ATMOsphere Technology Summit, speakers from Danfoss, Carrier, Nestlé and Eurammon shared their experiences with natural refrigerants in developing countries. Raising awareness of safety practices and delivering training of a high standard are identified as crucial for the successful proliferation of natural solutions in developing countries.
Many Options for Natural Refrigerants, Pega Hrnjak
Pega Hrnjak presented an overview of the main natural refrigerant alternatives with serious potential to become mainstream options: CO2, ammonia and hydrocarbons. Hrnjak considers ammonia chillers to be an especially attractive solution for developing countries. Moreover, developments such as hermetic compressors, microchannel condensers and Ni brazed plate evaporators have made the safe use of ammonia possible in low-charge applications. However, costs remain an issue for the widespread adoption of naturals that needs to be overcome. Prof. Hrnjak also stressed the need to recognise the differences in properties between the natural refrigerants in order to fully exploit their heat transfer advantages.
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