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B ifthereisalsoradiationtosurfaceofthecompartment tsurfacecompartment 87oc  in addition to the convection, what would be the surface temperature of the engine block use emissivity 0.8 for engine surface. A molten mixture of salt nano3 kno3 is used as the heat transfer fluid for application in a parabolic trough solar field. The molten salt at 300oc is flown through a steel pipe k 14 w/moc whose inner and outer diameters are 9 cm and 10 cm, respectively, in an environment at 32oc. If the heat transfer coefficients on the inside and the outside of the pipe are 150 and 30 w/m2c, respectively: a. Determine the rate of heat loss from the molten salt per meter length of the pipe. If the pipe is insulated with 5 cm thick sio2 wool insulation k 0.017 w/moc , what would be the rate of heat loss per meter length of the pipe. Hot water at an average temperature of 90oc passes through a row of eight parallel pipes that are 4 m long and have an outer diameter of 3 cm, located vertically in the middle of a concrete wall k 0.75 w/mk that is 4 m high, 8 m long, and 15 cm thick.

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