Geothermal Heat In Agriculture: Preliminary Results of an Energy Intensive System in Iceland

A new energy intensive outdoor shallow system of geothermal heated ground agriculture was constructed and has been tested at the Agricultural University of Iceland in Hveragerdi since 2007. The 5 by 10 square meter experimental heated garden and a 5 by 5 square meter control garden both have three d...

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Bibliographic Details
Main Author: Dell, Robert
Other Authors: Wei, C.S.; Sidebotham, George; Guido, Vito; Cataldo, Joseph; Smolar, Kelly; Bronfman, Alexander; Unnþórsson,Rúnar; Jonsson, Magnus Thor; Þórðarson, Tryggvi
Format: Text
Language:English
Published: Geo-Heat Center, Oregon Institiute of Technology, Klamath Falls, OR (USA) 2011
Subjects:
Iceland
Heat in Agriculture
Heating Systems
Heated Gardens
New York
Soil Heating
Tomatoes
Greenhouses
Geothermal Energy
Agriculture
Geothermal Heating Systems
Geothermal Resources > Iceland
Online Access:http://digitallib.oit.edu/cdm/ref/collection/geoheat/id/11469
Description
Summary:A new energy intensive outdoor shallow system of geothermal heated ground agriculture was constructed and has been tested at the Agricultural University of Iceland in Hveragerdi since 2007. The 5 by 10 square meter experimental heated garden and a 5 by 5 square meter control garden both have three different soil mixtures and depths of 10 and 20 centimeters (cm) over a piping system that is analogous to a heated sidewalk. A geothermal borehole supplies steam and steam condensate at temperatures from 100°-125˚C. A traditional shell and tube heat exchanger circulates a mixture of water and automotive anti-freeze continuously throughout the year in a closed loop at temperatures between 45-65˚C. Soil temperatures at 10 cm depth range from 25-40˚C.

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