DC heat [RE-wrenches]

[David Katz]

<x-flowed>
Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
Is your computer freezing up or slowing down?
Repair corrupt files and harmful errors - protect your PC
Take a 2-minute PC health check-up at no charge!
http://click.topica.com/caaedmqbz8Qcsbz9JC9a/PC PowerScan
-------------------------------------------------------------------

Geoff,
Resistance heat is 100% efficient, though often not cost effective.  
100% of the watts you put in the resistor turn into heat. 
David
David Katz
President, AEE Solar
formerly Alternative Energy Engineering
1155 Redway Drive - Box 339
Redway, CA 95560 USA
Phone (707) 825-1200
Fax (707) 825-1202
email: david at aeesolar.com
web: www.aeesolar.com


Geoff Greenfield wrote:

>Your free subscription is supported by today's sponsor:
>-------------------------------------------------------------------
>Is your computer freezing up or slowing down?
>Repair corrupt files and harmful errors - protect your PC
>Take a 2-minute PC health check-up at no charge!
>http://click.topica.com/caaedmqbz8QcsciHNopa/PC PowerScan
>-------------------------------------------------------------------
>
>Thanks for all the input-
>
>I could suggest heat pump to the customer, however - one of the design goals
>is simplicity (this is a remote installation in the high plateaus of Bolivia
>after all).  There is no allowance for duct work in this building, and the
>goal was to minimize battery plant, inverters and BOS... Also - my (minimal)
>understanding of Heat pumps (air source) is that at about 20 degrees they
>turn on the resistance strips anyway.... and sometimes there is a defrost
>cycle etc...  I always tell battery based folks to not try and power them
>(the last one had a 100 amp 240 breaker).  In response to Ian's thoughtful
>post I need to learn more and open my mind to such possibilities.  I am
>going to add a couple window AC units to MY house next summer....
>
>In a sense, DC resistance heating from the wind is kind of like direct water
>pumping.  In my scheme we heat the slab directly (after charging our minimal
>battery bank saved for AC loads).  Perhaps even go with two layers of heat
>and heat the deeper layer after a T-stat is satisfied.   According to David
>Katz - we can use off the shelf AC stuff with DC - this seems simple.
>(Hmmm... how about 3-phase wild AC?)  Resistance heat is inefficient, but
>also simple, reliable, easily installed and transported, avoids battery wear
>and tear and battery/inverter losses.  This is where my gut is leading me -
>any objections?
>
>For a brighter energy future,
>
>Geoff Greenfield
>NABCEP Certified Energy Practitioner
>
>THIRD SUN SOLAR & WIND POWER Ltd.
>340 West State Street
>Athens, OH 45701
>
>www.third-sun.com
>(740) 597-3111
>
>Your free subscription is supported by today's sponsor:
>-------------------------------------------------------------------
>FREE DVR
>And up to 3 additional standard receivers!
>Call 1-800- 901 - 5080 Today
>http://click.topica.com/caaeas1bz8QcsciHNopf/DirectSatTV
>-------------------------------------------------------------------
>
>- - - -
>To send a message: RE-wrenches at topica.com
>
>Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read
>
>List rules & how to change your email address: www.mrsharkey.com/wrenches/etiquette.php
>
>Check out participant bios: www.mrsharkey.com/wrenches/
>
>Hosted by Home Power magazine
>
>Moderator: michael.welch at homepower.com
>
>
>
>
>
>
>
>  
>

Your free subscription is supported by today's sponsor:
-------------------------------------------------------------------
FREE DVR
And up to 3 additional standard receivers!
Call 1-800- 901 - 5080 Today
http://click.topica.com/caaeas1bz8Qcsbz9JC9f/DirectSatTV
-------------------------------------------------------------------

- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read

List rules & how to change your email address: www.mrsharkey.com/wrenches/etiquette.php

Check out participant bios: www.mrsharkey.com/wrenches/

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at homepower.com

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------



</x-flowed>