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Geothermal Storage Integration into Supermarket’s CO2 Refrigeration System
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0002-2895-774X
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
ISTENER Research Group, Department of Mechanical Engineering and Construction, University Jaume I, Castellón de la Plana, Spain.
Energi & Kylanalys AB, Älvsjö, Sweden.
2018 (English)In: Proceedings of the IGSHPA Research Track 2018, 2018Conference paper, Published paper (Refereed)
Abstract [en]

This paper investigates the integration of geothermal storage into the state-of-the-art CO2 trans-critical booster systems. The objective is to evaluate the impact on energy efficiency of this integration. 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 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 20-30%. The determining factors on profitability of geothermal storage integration are the heating demand of the supermarket and possibilities of coupling its heating system to another nearby consumer. 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
2018.
National Category
Energy Engineering
Research subject
Energy Technology
Identifiers
URN: urn:nbn:se:kth:diva-235325DOI: 10.22488/okstate.18.000029OAI: oai:DiVA.org:kth-235325DiVA, id: diva2:1250080
Conference
IGSHPA Research Track, Stockholm, September 18-20, 2018
Projects
Effsys Expand
Funder
Swedish Energy Agency
Note

QC 20180921

Available from: 2018-09-21 Created: 2018-09-21 Last updated: 2018-09-21Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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