Shell-and-tube heat exchanger is used to cool oil (ch 2.2 kj/kg ? k) from 110°c to 65°c. the heat exchanger has two shell passes and four tube passes. the coolant (cc 4.20 kj/kg ? k) enters the shell at 20°c and leaves the shell at 42°c. for an overall tube-side heat-transfer coefficient of 1200 w/m2 ? k and an oil flow of 11 kg/s, determine a. the coolant mass flow rate b. the required surface area in the exchanger
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The field lines around one end of a bar magnet are shown below based on the diagram, what can you conclude about the pole of the magnet? a. is a south pole because the field hnes spread out from this end b. a north pole because the field lines spread out from this end c. a nouth pole because the field lines enter the magnet at this end d. is a north pole because the field lines enter the magnet at this end
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Shell-and-tube heat exchanger is used to cool oil (ch 2.2 kj/kg ? k) from 110°c to 65°c. the heat e...