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Winter air as a source for cold storage injection
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
1998 (English)Conference paper, Presentation (Refereed)
Abstract [en]

There is an increasing interest in Low Temperature Underground Thermal Energy Storage (LT UTES) for the purpose of space cooling. Some of the different types of UTES systems, with an anti-freeze heat carrier in a closed pipe system, tolerate injection temperatures below freezing. Thus, seasonal storage of cold with injection temperatures below freezing would be possible in large Borehole Thermal Energy Stores (BTES). The most obvious cold source is the cold winter air. There is however very little experience of low temperature cold extraction from air for injection into the ground.A low temperature cold injection field test was performed during the winter of 1997/98 at Luleå University of Technology. The test was performed in one 65 m borehole drilled vertically into the crystalline bedrock. Cold was extracted from the winter air at occurring air temperatures - i.e. sometimes well below -30°C. The aim of this test was to obtain experience of problems associated with cold extraction from the air and cold injection into the ground.

Place, publisher, year, edition, pages
Research subject
Water Resources Engineering
URN: urn:nbn:se:ltu:diva-36919Local ID: abe10320-bc1f-11db-a46c-000ea68e967bOAI: diva2:1010418
Stockton International Geothermal Conference : 16/03/1998 - 17/03/1998
Godkänd; 1998; 20120608 (ysko)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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