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A Literature Review on Heating of Ventilation Air with Large Diameter Earth Tubes in Cold Climates
Faculty of Environmental Design, University of Calgary, 2500 University Drive, NW, Calgary, AB T2N 1N4, Canada
* Author to whom correspondence should be addressed.
Received: 4 June 2013; in revised form: 13 July 2013 / Accepted: 16 July 2013 / Published: 25 July 2013
Abstract: Earth-air heat exchange (EAHE) systems offer the possibility of reducing use of nonrenewable energy for heating ventilation air in cold climates. The number of installations of large diameter (greater than 900 mm) EAHE systems reported for cold climates is small. Even less has been reported on their heating performance, but the available information suggests that further rigorous assessment is warranted to determine whether the reported better than expected temperature rise is supported and, if so, the reasons for this. Another concern is the possibility of long-term heat depletion in the surrounding soil, which would affect performance. Only a couple of short-term experimental studies of ground temperature effects of heating with EAHE were found for cool climates. Four articles that addressed ground temperature effects with horizontal ground source heat pump exchangers had conflicting findings regarding heat depletion in the soil.
Keywords: earth air heat exchangers; earth tubes; ventilation; heating; ground temperatures
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MDPI and ACS Style
Tan, L.; Love, J.A. A Literature Review on Heating of Ventilation Air with Large Diameter Earth Tubes in Cold Climates. Energies 2013, 6, 3734-3743.
Tan L, Love JA. A Literature Review on Heating of Ventilation Air with Large Diameter Earth Tubes in Cold Climates. Energies. 2013; 6(8):3734-3743.
Tan, Lili; Love, James A. 2013. "A Literature Review on Heating of Ventilation Air with Large Diameter Earth Tubes in Cold Climates." Energies 6, no. 8: 3734-3743.