h a l f b a k e r yFutility is persistent.
add, search, annotate, link, view, overview, recent, by name, random
news, help, about, links, report a problem
browse anonymously,
or get an account
and write.
register,
|
|
|
Photovoltaic cell on top receives light. Powers small Peltier
and tiny fan which emits heat through slots upward.
On bottom side you get cold.
Cover your roof and walls with these inefficient "air
conditioners" and you'll never be hot in the room.
Peltier flashlight
http://www.cbc.ca/n...ann-makosinski.html
[rcarty, Aug 18 2013]
[link]
|
| |
Link shows flashlight powered by peltier tiles. The temperature differential between hand on outside and cool air inside hollow flashlight generated small voltage that was then fed through step up transformer. Ultimately this could be practical for air conditioning if instead of a flashlight there was a fan blowing cool air down into the house and the outside of the apparatus was exposed to the suns rays. |
|
| |
Wouldn't it be cheaper and more effective to just use your solar panels to drive you air conditioner that uses a conventional compressor? |
|
| |
Each transformation from one form of
energy to another involves loss. |
|
| |
So, PV cells are only a few percent efficient,
and Peltier coolers equally so. |
|
| |
The PV -> electromechanical heatpump might
be a trifle better. |
|
| |
Best of all would be to focus solar energy
directly onto the heating coil of an
absorbtion heatpump; no transformations
involved, so despite the poor pumping
efficiency the overall thermodynamics are
preferential. |
|
| |
The most efficient cooling system is to move to East
bloody Anglia. |
|
| |
I doubt it. Not questioning the absolute magnitude of
available coolth, but the sheer effort and
paininthearseitude by which it must be divided yeilds an un-
most of efficiency. |
|
| |
Interestingly, German PoW's in WW2 who
were kept in camps around the King's Lynn
area to provide agricultural workers were
frequently heard to speak in terms of wistful
longing about "Good old Stalingrad" … |
|
| |
Was going to travel to the Hermon mountain for the
summer. Its cool there all year round. But then Kerry
said it would be a good idea to give it over to Assad
for 'peace' with Syria. But that was so long ago. More
than a year. No, wait... |
|
| |
Scad, no, because you can't connect PV cells to an air
conditioner without a. Solar panel infrastructure, b.
Permits from electric co. c. Inverter. |
|
| |
Cost will go down with usage in cars and buildings
(especially army facilities that spend tons of money
on air conditioning in desert) |
|
| |
Nailed or screwed or glued onto the roof walls ? Individual thermostats or some type network or group control ? Wash off with hose to clear dirt and dust from the tiny fans? |
|
| |
Maybe work up a version to go on an ice chest first to prove concept and capabilities. |
|
| |