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Geothermal Storage Integration into a 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
Department of Mechanical Engineering and Construction, Universitat Jaume I, Campus de Riu Sec s/n, E12071 Castelló de la Plana, Spain. (ISTENER Research Group)ORCID iD: 0000-0003-3404-6755
Energi & Kylanalys AB, Varuvägen 9, 125 30 Älvsjö, Sweden .
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
2019 (English)In: International journal of refrigeration, ISSN 0140-7007, E-ISSN 1879-2081Article in journal (Refereed) Accepted
Abstract [en]

This paper investigates the integration of geothermal storage into state-of-the-art CO2 trans-critical boostersystems. The objective is to evaluate the impact of this integration on energy efficiency. Three scenarios ofintegration are studied including stand-alone and integrated supermarket building systems.The results show that for a stand-alone average size supermarket, heat recovery from the CO2 system shouldbe prioritized over a separate ground source heat pump. Extracting heat from the ground by an extraevaporator in the CO2 system has also little impact on this supermarket annual energy use. However, in thecase of supermarket integration with a neighbouring building where the supermarket provides heat to theneighbour, geothermal storage integration can reduce the total annual running cost of the two non-integratedbuildings by 20-30% with a payback time of less than 3.5 years. The results also show there is no need fora separate ground source heat pump.

Place, publisher, year, edition, pages
Elsevier, 2019.
Keywords [en]
state-of-the-art CO2 system, Supermarket, Geothermal energy storage
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-252294DOI: 10.1016/j.ijrefrig.2019.05.026OAI: oai:DiVA.org:kth-252294DiVA, id: diva2:1318041
Note

QC 20190527

Available from: 2019-05-24 Created: 2019-05-24 Last updated: 2019-05-27Bibliographically approved

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The full text will be freely available from 2021-05-23 00:00
Available from 2021-05-23 00:00

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Rogstam, JörgenSawalha, Samer

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