Heat transfer calculation for optical tubes and heat pipes
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I am currently working on thermal calculations for heat pipes and optical tubes, but the results I obtain are not always consistent with those obtained by external experts. In particular, the heat transfer coefficient: theirs can be over 60, while mine is only in the 40s. The flue gas temperature is 150/80, the water temperature is 5/90, the flue gas flow rate is 46.76 kg/s, and the velocity of the flue gas at the inlet side is 3.9 m/s. The calculations are carried out for tubes with a diameter of 38 mm and a wall thickness of 3 mm; the spacing between the tubes in both the transverse and longitudinal directions is 80 mm. The total length of the heat pipes required is 5.1 m, with the water side being of the tank-type design
Why use a light tube? What are the components of the smoke? I can calculate that for you
Heat pipes use finned tubes; with a larger fin ratio, the heat transfer coefficient increases.