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Old 08-28-2019, 12:48 PM   #6630 (permalink)
aerohead
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harvest the difference

Quote:
Originally Posted by All Darc View Post
No solar energy in the tough winters... Solutions???
Nuclear power just for the winter (when home heating it's more required)???

Solar concentrators to help solar panels get better output efficiency?
But with clouds the light of the sun became no longer parallel, but difused, So a concentrator to try work with difused light can be a challenge.

If they could develop a way to harvest enery the the difference of potential (thermal) from cold air in relation to the warmer temperature of ground 3 meters away from surface.

It's easy to move a turbine with heat, as you just need to create vapor. But with cold...
The Wally Minto 'Wonder Wheel',operates on as little as a few degrees difference between the 'boiler' and condenser,using refrigerants as the working fluid.They turn at very low rpm,with 'torque' as their primary attribute,and are typically geared up for more useful power.
It's the only low delta-T engine I've seen.
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