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Integration of Supermarket’s CO2 Refrigeration System and Geothermal Storage
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0002-2895-774X
ISTENER Research Group, Department of Mechanical Engineering and Construction, Universitat Jaume I, Campus de Riu Sec s/n, E12071 Castelló de la Plana, Spain .ORCID iD: 0000-0003-3404-6755
Energi & Kylanalys AB, Varuvägen 9, Älvsjö 125 30, Sweden . (Energi & Kylanalys)
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
2019 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

This paper investigates the energy efficiency of geothermal storage integration into the state-of-the-art CO2 trans-critical booster systems. Three scenarios of integration are studied including stand-alone and integrated supermarket building systems.

The results show that for a stand-alone supermarket, heat recovery from the CO2 system should be prioritized over extracting heat from the ground, which this heat extraction can be done either by an extra evaporator in the CO2 system or by a separate ground source heat pump. In the case of supermarket integration with a nearby district heating consumer, geothermal storage integration with extra evaporator in the CO2 refrigeration system can reduce the total annual running cost of the two buildings by 19-31% and with a payback time of less than three years.

This integration is beneficial if the full efficient heat recovery capacity of the CO2 system is not sufficient to provide the entire demands.

Place, publisher, year, edition, pages
MontReal, Canada: International Institute of Refrigeration, 2019.
Keywords [en]
state-of-the-art CO2 trans-critical booster system, Supermarket, Geothermal storage
National Category
Engineering and Technology
Research subject
Energy Technology
Identifiers
URN: urn:nbn:se:kth:diva-257895DOI: 10.18462/iir.icr.2019.570OAI: oai:DiVA.org:kth-257895DiVA, id: diva2:1349319
Conference
25th IIR International Congress of Refrigeration, August 24-30, 2019, Montreal
Note

QC 20190909

Available from: 2019-09-08 Created: 2019-09-08 Last updated: 2019-09-09Bibliographically approved

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