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Waste heat recovery of a transcritical CO2 sys...


About this presentation

related to ATMOsphere Europe 2011
published on 11 October 2011
20 pages
923 KB

A pioneering design makes it possible to use the waste heat of transcritical CO2 refrigeration systems to drive an adsorption chiller in summer that generates additional cooling and thus supports the CO2 refrigeration unit. The overall efficiency of the CO2 transcritical system is raised by cooling the refrigerant additionally after the gas cooler on the one hand and on the other hand by lowering the high pressure. The two systems can very well be combined because of their demand and supply characteristics, as high ambient temperatures lead to high waste heat in the refrigeration system and this is when additional cooling from the adsorption chiller is especially effective. It is expected that this combination will lead to yearly energy savings of the refrigeration unit of around 8%.

About the speaker(s)

Raphael Gerber


 Raphael Gerber is working for a Swiss consultant in refrigeration, being in charge of innovative technologies and especially CO2. In the last years, he gained comprehensive experience in engineering sub- and transcritical CO2 plants for different retail stores and has been involved in the design and realization of ground-braking refrigeration technologies with CO2. Before entering the world of refrigeration, he used to work for a company offering technologies for technical gases, such as CO2, in different applications. He holds a degree in mechanical engineering.