Satamax : I had to stretch my mind a little to find the benefits over no fresnel, and even then I would think that in winter a large reflective pool that bounced
winter sun into the house hitting a massive Trombe wall would actually be more effective than the biggest Freznel lens I would feel safe having in my house.
If Your homeowner had been unable to gather any solar gain for several days, clouds/rain, traveling away, there might be some immediate gain and higher
temps at the surface of the Trombe wall, these higher surface temps would re-radiate to the air raising its temperature. this would be a good thing if the
space was chilled.
Also a fresnel lens might be positioned to bend light onto the Trombe walls surface earlier in the morning, and later in the day then sun incidence angle or
structural layout would otherwise permit .
Short version, I wonder too ! For the good of the Craft ! Big AL
Success has a Thousand Fathers , Failure is an Orphan
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Location: Southern alps, on the French side of the french /italian border 5000ft elevation
posted 5 years ago
Allen, the idea behind it, is a smaller type of wall. I mean, something like a rocket's mass, heated by a fresnel lens, to a higher temperature. Which would store energy for several days may be.