Water is heated by submerging 50-mm-diameter, thin-walled copper tubes in a tank and passing hot combustion gases ( 750 k) through the tubes. to enhance heat transfer to the water, four straight fins of uniform cross section, which form a cross, are inserted in each tube. the fins are 5 mm thick and are also made of copper ( 400 w/m·k).
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Water is heated by submerging 50-mm-diameter, thin-walled copper tubes in a tank and passing hot com...
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