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Larger solar closets



La Defense (is that the name of the empty cube in Paris?) looks to be about
500' tall, from a picture. If we filled the space inside with containers of
water, and insulated the front and back faces, and added a passive solar air
heater on the south face, we would have a solar closet that would take about
500^2 = 250,000 days, ie 685 years to cool to 70 F, with no sun, in 32 F air.

If the earth were a solar closet, it would take about 5 trillion years
to cool to 70 F. Of course the inside is molten rock, not hot water.

Nick


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