Share

Hybrid refrigeration with CO2 vapor compression cycle and adsorption chiller: an efficient combination of natural working fluids.

Number: AD-YR3-1096

Author(s) : GIBELHAUS A., FIDORRA N., LANZERATH F., et al.

Summary

Refrigeration is a significant emission source of greenhouse gases due to the required electricity and the leakage of the working fluid [1]. It is thus desirable to increase the efficiency and to use environmentally friendly working fluids. CO2 refrigeration systems use a natural and cheap working fluid, but suffer from low efficiencies at high ambient temperatures due to transcritical operation. The efficiency can be increased by recovering heat from the CO2 cycle to drive a thermal adsorption chiller and reintegrating the cooling into the CO2 cycle. The feasibility of such an hybrid system has been demonstrated in a pilot project, connecting commercial components [2, 3]. In this project, electrical energy savings of 6-8 % were achieved, but the main conclusion was that the sizing and the operation are crucial to exploit the full potential of the hybrid system. In this work, we propose a model-based approach to optimize the size ratio of the CO2 refrigeration system and the adsorption chiller. Furthermore, we optimize the operating parameters of the hybrid system. Finally, we assess the annual energy savings potential for 4 European cities.

Details

  • Original title: Hybrid refrigeration with CO2 vapor compression cycle and adsorption chiller: an efficient combination of natural working fluids.
  • Record ID : 30023100
  • Languages: English
  • Source: International sorption heat pump conference, ISHPC 2017, Tokyo august 7-10.
  • Publication date: 2017/08/07

Links


See other articles from the proceedings (159)
See the conference proceedings

Indexing