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Solar Stirling Engine-better than silicon chips? - Page 2

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Posted by Morris Dovey on December 10, 2007, 10:38 am
 
J. Clarke wrote:

| Stirlings and fuel cells may have been big news in the '60s, but
| I'm a bit puzzled as to why anyone thinks that they're anything to
| get excited about today.

A friend and I have been tinkering with a fluidyne (a liquid-piston
Stirling cycle engine) whose only moving parts are air and water as
time and money have allowed. There is some info, a video, drawings,
and a photo on a web page at the link below.

The immediate goal is to come up with a very low-cost solar-powered
water pump that can be used for irrigation and village water supply in
areas where electrical power isn't an option.

Although we'd originally planned to use a parabolic trough as an
energy collection device, we've shifted our focus toward flat panel
collectors. Photos of the prototype trough construction and testing
are on a web page at the link below.

Of some interest is that Stirling cycle engines can be operated in
reverse. In the "normal" conceptualization, one drives a Stirling
engine by applying heat to its "hot" side and removing it from the
"cold" side to produce mechanical energy.

However, if one applies mechanical energy to a Stirling cycle engine,
it will "pump" heat from its cold side to its hot side.

My intent is to drive a fluidyne with solar energy to produce
mechanical energy - which will be applied to a second fluidyne so that
this second fluidyne will function as a heat pump.

The resulting solar-powered heat pump could be used to provide
refrigeration and air-conditioning in areas where electricity is
either unavailable or expensive.

I would guess that might become exciting to people in hot, sunny
areas...

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/Stirling/



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