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Investigation of heat recovery in CO2 trans-critical solution for supermarket refrigeration
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
2012 (English)In: International journal of refrigeration, ISSN 0140-7007, E-ISSN 1879-2081, Vol. 36, no 1, 145-156 p.Article in journal (Refereed) Published
Abstract [en]

Using computer simulation modeling this study investigates the performance of a CO2 trans-critical system with heat recovery from the de-superheater. The influence of sub-cooling (or further cooling) in the condenser/gas cooler on system performance is investigated. Following the suggested control strategy in this study, the extra operating energy demand required to recover the needed heating energy from the analyzed CO2 system is smaller than what a typical heat pump would require for the same load. This is the case for almost all ambient temperatures over a full season. When taking the simultaneous heating and cooling loads into account, the CO2 trans-critical system has lower annual energy usage in an average size supermarket in Sweden when compared to a conventional R404A refrigeration system with separate heat pump for heating needs. CO2 trans-critical systems are efficient solutions for simultaneous cooling and heating needs in supermarkets in relatively cold climates.

Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 36, no 1, 145-156 p.
Keyword [en]
Carbon dioxide (CO2); Supermarket; Refrigeration; modelling; heat recovery
National Category
Energy Engineering
Research subject
SRA - Energy
URN: urn:nbn:se:kth:diva-175674DOI: 10.1016/j.ijrefrig.2012.10.020ISI: 000314375800014ScopusID: 2-s2.0-84870438175OAI: diva2:861873

Titre en franÇais:

Solution au CO2 transcritique pour le froid dans les supermarchés : Étude sur la récupération de chaleur

QC 20121206

Available from: 2015-10-19 Created: 2015-10-19 Last updated: 2015-11-13Bibliographically approved

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Sawalha, Samer
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