Engineering, 06.10.2019 09:30 prin30004
Aprocess stream is cooled from 80oc to 40 oc in a shell-and-tube heat exchanger using cooling water in the tube side that enters the cooler at 30oc and leaves at 38oc under nominal condition. it has been determined that the process side resistance to heat transfer is dominant. it is desired that the process fluid flowrate through the cooler be decreased to 60% of its nominal value. for this condition, answer the following: (a) by how much the cooling water flowrate be changed to maintain the process side exit temperature at 40oc? 3.5 (b) what is the exit temperature of the cooling water in this case?
Answers: 2
Engineering, 04.07.2019 18:10
Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.
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Engineering, 04.07.2019 18:20
Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]
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Engineering, 04.07.2019 18:20
What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.
Answers: 3
Engineering, 04.07.2019 18:20
Air flows over a heated plate à t a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.
Answers: 1
Aprocess stream is cooled from 80oc to 40 oc in a shell-and-tube heat exchanger using cooling water...
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