solarray

From void into vision, from vision to mind, from mind into speech, from speech to the tribe, from the tribe into din.

Monday, November 17, 2008

Windowbox Solar Air Heater



This is a demonstration model of a solar windowbox air heater.

You can build it from a sheet of insulation board, some clear glass or plastic, and a furnace air filter painted black.

When the sun shines, the black absorber inside the insulated windowbox gets hot, heating air which rises into the room behind the window, and drawing cooler air from inside that room past the absorber in a thermal loop that lasts until the sun goes down.

At night, the cold air sinks to the bottom of the windowbox and closes off this thermal loop so there is no additional night time heat loss.

Increase the efficiency of the windowbox solar air heater with a solar electric, photovoltaic, PV fan.

This demonstration model uses a repurposed solar car window ventilator. Only when the sun hits the PV panel does the fan move air, an automatic solar circuit thermostatic control.

The windowbox solar air heater is a supplemental heater for one room with a south-facing window and can be modified to provide increased ventilation and cooling in the summer as Edward Sylvester Morse's 1881 solar air heater design did.



Cost for a 2 foot by 3 foot insulation board solar windowbox air heater is around $100. PV fan car vents are available for as little as $5. One recently built windowbox has heated air by at least 20º Fahrenheit, from 65 to 85º, and will do so all winter.

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3 Comments:

At 11/26/2008 10:11 AM, Anonymous Ken Ward said...

Gmoke,

Nice contrast to $1k+ window boxes I've seen advertised.

Would be interested in communicating with you about ideas & Boston area connections for our project, JP Green House (see our blog at jpgreenhouse.blogspot.com and our "beta" wiki at jpgreenhouse.wetpaint.com/.

I'm Ken Ward, email us at greenhousejp[at]gmail

Thanks, Ken

 
At 12/16/2008 4:08 PM, Anonymous Green Cleaner said...

Its definitely an interesting concept, it'd be neat to see something like this take off and become popular

 
At 4/06/2011 3:59 AM, Blogger Barbara said...

There are several ways to use solar power around the house and not just for powering.
solar energy

 

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