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Direct contact PCM-water cold storage
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.ORCID iD: 0000-0001-9556-552X
2010 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 87, no 8, 2652-2659 p.Article in journal (Refereed) Published
Abstract [en]

Comfort cooling demand continues to increase throughout the world Conventional cooling production results in high demand for electrical power during peak hours, leading to high emissions for producing cooling, and potential power shortages in electric grids With a cold storage, the peak power demand is effectively managed and enables free-cooling. This paper examines one concept using phase change materials (PCM) for storing of cold, where the cold carrier (water) is in direct contact with the PCM. This is in order to enable high power for charging and discharging while providing a high storage capacity. A theoretical model highlights important design parameters for reaching large storage and power capacity The capacity increases with the Packing Factor and temperature difference across the storage. For high power, the flow rate, temperature difference, and drop size is important parameters which is also verified in an experimental evaluation. The obtainable power is between 30 and 80 kW/m(3) storage Practical limitations of this concept are shown to be PCM-water bed expansion and non-uniform channeling due to asymmetric and unstable PCM shells.

Place, publisher, year, edition, pages
2010. Vol. 87, no 8, 2652-2659 p.
Keyword [en]
PCM, Thermal energy storage, Cold storage, Direct contact storage, Dynamic storage
National Category
Energy Systems
URN: urn:nbn:se:kth:diva-46633DOI: 10.1016/j.apenergy.2010.01.005ISI: 000279134200026ScopusID: 2-s2.0-77953132066OAI: diva2:454909
QC 20111108Available from: 2011-11-08 Created: 2011-11-04 Last updated: 2011-11-08Bibliographically approved

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Martin, Viktoria
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