Tom's posts

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Posted by Tom on May 16, 2002 12:55 pm

#31 - Renewable Energy > Technical Discussion: Other > Re: differential contoller

try www.grainger.com

Posted by Tom on May 3, 2002 10:20 am

#32 - Renewable Energy > Wanted > Re: Looking for solar-powered pool heater...

Using a car thermostat rated at 160 F will begin to open around 100 F anyway. The 160 Rating is when it is fully open.

Posted by Tom on May 3, 2002 10:15 am

#33 - Renewable Energy > Wanted > Re: Looking for small round PV cells for hobby project

try your local Radio Shack or electronics store.

Posted by Tom on May 3, 2002 10:13 am

#34 - Renewable Energy > Wanted > Re: low-powered pump

how small a pump do you need, eg, flow rate. Radio shack carries some small dc submersible pumps for hobbies. Or go to the website for American Science and Surplus. They have a lot of gizmos.

Posted by Tom on May 3, 2002 10:10 am

#35 - Renewable Energy > For Sale > Re: mounting system

there are no set rules for mounting. Do you have room on the ground? You can mount them on other parts of your roof as long as you direct and angle them correctly.

Posted by Tom on May 3, 2002 10:07 am

#36 - Renewable Energy > For Sale > Re: LOOKING FOR SMALL ROUND PV CELLS FOR HOBBY PROJECT

try radio shack or equivalent

Posted by Tom on Apr 25, 2002 12:31 pm

#37 - Renewable Energy > Technical Discussion: Other > Re: remote internet bridge

Nick, first you will have to use some 6 volt batteries. The most common is what is called a golf cart battery and can be found most anywhere. You would put 3 of these in series to get your 18 volts. Then if you want 3 days storage:

18 volts x 1amp = 18watts
x 24 hrs x 3 = 1296 watt hrs
/ 18 volts = 72 amp hrs or 24 amp hrs/day

So you would have to get batteries with a rating of 80-100 amp hrs. Two 50W panels, at 18 volts, getting 10 hrs of sun a day, will get you
27 amp hrs/day.

Posted by Tom on Apr 25, 2002 12:11 pm

#38 - Renewable Energy > RE General Discussion > Re: wind heat

Bruce, Alan has the right idea. A diversion load is what is mainly used. A bank of resistors, usually mounted on a heat sink, can serve as this load and will produce heat that can be harnessed using fans, as can an electrical water heater elements which must be submerged in order not to overheat and fry out. But as Alan said a diversion to a useful load is best, as long as it is something that constantly has a draw of current and is properly switched once the diversion load is available.

Posted by Tom on Apr 25, 2002 12:00 pm

#39 - Renewable Energy > RE General Discussion > Re: Questions installing a Solar panel system?

You should be using the power from the system directly without tying into the power company, whom you are trying to avoid in the first place. All you need is a properly sized inverter to change from DC/AC.

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