Natural refrigerants CO2, ammonia and hydrocarbons have been used in different HVAC & R applications for many years. With the exception of a few sectors, their market penetration has remained relatively low.
Companies want more and more less volume of refrigerant in their installations. That is why they often opt for indirect systems. Generation and distribution of heat and cold are separated from each other. For example, this trend ensures that Propane Chillers are gaining more attention.
Heat released by the cooling process can be reused elsewhere in a building, for example heating in the room or for hot tap water. The heat can be used directly in another workspace, or transferred via an intermediate medium, for example via a pressurized gas boiler.