I've been surfing the web looking for possible approaches to deal
tremendous heat buildup in an automobile interior as it sits parked in
sunlight. I've seen solar powered window ventilation fans, but they're
inadequate for keeping my black car cool in Southern California. I thought
perhaps a thermoelectric generator might do the trick, but their
is pathetic even with temperature differences of 200C.
It's well documented that a car interior can hit 150-180F on a
with the ambient temperature at 80-90F. This doesn't provide enough
temperature difference to make use of a TEG, but it seems that it's plenty
for a Stirling Engine. I don't know anything about designing these things,
but surely you can envision a device, similar to one of these clip-on
window fans, that could do the trick? Two obvious disadvantages of the
approach are that when the window isn't aligned with the sun, the fan
work, and of course, solar cells themselves are less efficient as
temperatures go up. The whole car continues to get hot even though the sun
isn't shining directly on the solar fan...
Of course, you have to get its price down in the $40 range to be
competitive with the other products already on the market, but I think
would be a viable way to get stirling engines into common everyday
do you think?