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Heat recovery investigation of a supermarket refrigeration system using carbon dioxide as refrigerant
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Tillämpad termodynamik och kylteknik.
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Tillämpad termodynamik och kylteknik.
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Tillämpad termodynamik och kylteknik.ORCID-id: 0000-0002-2895-774X
2014 (Engelska)Ingår i: 11th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerants and Environmental Protection, GL 2014, International Institute of Refrigeration, 2014, s. 277-285Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

This study investigates the heat reclaim of trans-critical CO2-booster refrigeration unit in a supermarket in Sweden. The aim is to compare the control strategy for heat recovery in real supermarket installation to the optimum control strategy.

The optimum control strategy based on theoretical analysis is explained. By analyzing field measurement of a supermarket, heat recovery in the refrigeration system is studied and compared to the optimum case. To investigate the potential of higher heat recovery rate, a computer model is developed based on the optimum control strategy.  The model is also used to calculate the boundary conditions at which the system should run for highest COP.

The results show that heat can be recovered at heating COP of 3-4.5. The theoretical analysis shows that the amount of heat that can be recovered from the refrigeration system is about 1.3 times (130 %) the cooling demand in the system. However the analysis of the field measurements shows that only between 30-60 % of the available heat to be recovered is utilized, the rest is released to outdoors. The analysis in this study shows that there is a potential to recover much more heat from the refrigeration system at relatively high heating COP compared to heat pump.

Ort, förlag, år, upplaga, sidor
International Institute of Refrigeration, 2014. s. 277-285
Nyckelord [en]
supermarket refrigeration, CO2, trans-critical, heat recovery
Nationell ämneskategori
Miljövetenskap
Identifikatorer
URN: urn:nbn:se:kth:diva-175683ISI: 000352781600030Scopus ID: 2-s2.0-84932143657ISBN: 9782362150043 (tryckt)OAI: oai:DiVA.org:kth-175683DiVA, id: diva2:861907
Konferens
11th IIR Gustav Lorentzen Conference on Natural Refrigerants, GL 2014; Shangri-La Hotel78 Beishan RoadHangzhou; China; 31 August 2014 through 2 September 2014
Anmärkning

QC 20151216

Tillgänglig från: 2015-10-19 Skapad: 2015-10-19 Senast uppdaterad: 2015-12-16Bibliografiskt granskad

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