Mattias Vesterlund
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Data center heated greenhouses, a matter for enhanced food self-sufficiency in sub-arctic regions
20 November 2020, 17:03
Now our Elsevier article in Energy is available online, where we are studying the possibility to use datacenter excess heat for greenhouse heating and increase of the local food self-sufficiency in our sub-arctic region.
This paper examines the possibility of increasing Northern Sweden’s degree of self-sufficiency in food supply, at the 65th latitude. A dynamic building energy simulation software was used to compute both the hourly exhaust air output from a 1 MW data center for one year and the corresponding heating demand for two different greenhouse sizes, 2000 m2 and 10 000 m2, and two different production scenarios. The results are described in the paper and shows a good potential.
The two scenrios were partial year production, during 1 Mars – 15 October, without grow lights and full-year production with grow lights. The study showed that 5.5–30.5% of the electrical input to a 1 MW data center could be recovered. The 2000 m2 greenhouse could operate almost entirely, 89.7–97.9%, on excess heat while only 50.0–61.5% of the 10 000 m2 greenhouse heating demand could be met for full- and partial-year production, respectively.
Furthermore, it is concluded that the 10 000 m2 greenhouse with full year production was the most prominent case and would cost-effectively yield 7.6% of northern Sweden’s vegetable self-sufficiency.
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