http://www.innogrow.com/en/1_00geslotenkas.html
http://www.agf.nl/nieuwsbericht_detail.asp?id=28141

they estimate some 700 hectare will be build in 5 years as closed and 
semi closed systems.

[EMAIL PROTECTED] escribió:
> "greenhouse of 1.5 ha... constructed in Holland... does not consume gas or 
> electricity in winter...
> heated by means of energy accumulated in summer period in watery sand 
> layers on the depth 80-100 meters. Warm water is delivered by means of 
> special pumps for the heating of the greenhouse in cold season. The 
> temperature of the pumped water reaches 50 degrees.
> 
> In summer... the greenhouse is cooled by cold water in line with the 
> pull-in principle."
> 
> URL : http://www.lol.org.ua/eng/showart.php?id=53005
> 
> If you know of other examples where the same technology is applied, in 
> Europe or elsewhere, please provide links or references.
> 
> Thanks in advance,
> 
> Viateur
> 
> 
> _______________________________________________
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> 
> 

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