A flat-plate solar collector is 1 m square and is inclined at an angle of 20o with

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A flat-plate solar collector is 1 m square and is inclined at an angle of 20o with the horizontal. The hot surface at 160oC is placed in an enclosure that is evacuated to a pressure of 0.1 atm. Above the hot surface, and parallel to it, is the transparent window that admits the radiant energy from the sun. The hot surface and window are separated by a distance of 8 cm. Because of convection to the surroundings, the window temperature is maintained at 40oC. Calculate the free-convection heat transfer between the hot surface and the transparent window.
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Heat Transfer

ISBN: 978-0073529363

10th edition

Authors: Jack Holman

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