Nursery Root Heating System [RE-wrenches]

[Jeff Clearwater]

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Hi Mo,

Root heating (and cooling) systems are easily integrated into a 
solar/gas/wood/dump load hot water heating (or cooling) system simply 
by pulling a thermostated loop off of a storage tank like any other 
radiant heating (or cooling)  system.  We've done them with just 
solar thermal and also multiple source systems using wood stove 
loops, instantaneous gas hot water heaters, wind load dumps, or PV 
charge regulation heating dump loads.  We first used PVC (not so good 
for plants)  but now use PEX.

Commercial greenhouses like root zone heating not only because it 
saves vast amounts of energy but also keeps condensation down which 
is a real problem in some commercial crops when watering needs cause 
so much condensation on the inside of the plastic glazing as to cut 
out alot of light.

Check out:

http://attra.ncat.org/attra-pub/rootzone.html
http://ohioline.osu.edu/aex-fact/0801.html

related:
http://www.niagrow.com/cooling.html
http://www.spnwsupply.com/projectShowcase.html

Hope that helps!

Jeff C.


>Hi All,
>
>I have a prospect (commercial nursery) who is interested in both PV and an
>alternative source for heating their greenhouses.  They want roof level
>heating and this being Southern California, only at night.  Right now, they
>use a gas fired heater to heat water which is recirc'ed under all of the
>seedlings.  There are at least a dozen large green houses that are impacted.
>Any suggestions?  Their objective is to reduce their dependence on SDGE and
>save money.
>
>Thanks,
>Mo
>--
>Mo Rousso
>President
>HelioPower
>Renewable Energy Systems
>Remote Power Solutions
>mrousso at heliopower.com
>www.heliopower.com
>760.451.9374
>
>
>--
>[Non-text portions of this message have been removed]
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-- 
~~~~~~~~~~~~~
Jeff Clearwater
Village Power Design Associates
Sustainable Energy & Water Solutions for Home & Village

877-SOLARVillage
PO Box 115
Boonville, CA 95415

61 Baker Rd
Shutesbury, MA 01072
413-256-6777, 413-825-0372 (Fax)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`~

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