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    Narsi posted a question Use of solar drying for industrial processes 10 months ago

    Which are the industrial processes for which solar thermal can be used as a source of heating or drying?

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    Narsi posted a question Maximum temperature in a solar water heater 10 months ago

    What is the maximum temperature that can be achieved by solar water heaters? I heard it was not more than 70 degrees. Is that correct?

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      Thudpucker 10 months ago

      I had a plan to heat water using mirrors, reflecting to a Steel ball. Water would cycle though the steel ball. Cold water in as the hot water went out. Someone told me the water in the steel ball might get up to 1000 Degrees F. Way too hot for plastic pipes. But it might make a good Still! Water in those "Roof Boxes" hardly gets as warm as the sunlight on the box. Maybe as much as 85 Degrees F. It's expensive to make a tank or a series of pipes to hold that water at it's warm temp too. You need a lot of insulation around your storage pipes or tank. What about the winter? The temp drops below freezing for 20 to 300 hours, with only a bit of sunlight for 12 hours every day for warming. Water does not freeze hard around here till the temps have been in the 20's F for several hours. I know that's hard to figure out. But before we'd put all that money into Pipe's and mirrors we'd want to know it wont freeze and bust in the winter.

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