Pre-requisite / Skillset for Heat Transfer Operations Internship
1. Intern should be able to analyze steady and unsteady state conduction systems.
2. Must be able to analyze convective heat transfer Systems.
3. Being familiar with the analysis of Radiative Heat Transfer Systems.
4. Should be able to analyze Extended Surfaces, Evaporators and Agitated Vessels.
5. Basic design of DPHE and STHE should be known.
6. Should be able to calculate heat transfer rates by various modes of heat transfer, for various geometry of equipment and should get introduced to Unsteady Heat Transfer.
7. Intern should be able to design Double Pipe Heat Exchanger and also be able to do preliminary design of Shell and Tube Heat Exchanger.
8. Must know how to apply basic principles of heat transfer for designing heat transfer systems.
9. Should be capable of modeling heat transport systems and develop predictive correlation.
10. Should be able to assess and evaluate various designs for heat transfers and optimize the solution.
11. Require basic knowledge about heat transfer and its processes used in Chemical Process Industries.
Heat Transfer Operations Internship Test
Intern has to take Heat Transfer Operations internship test in which they will be asked 50 multiple-choice questions. They have to score grade A or A* on this test to be eligible for the internship. Here’s a sample set of questions on the Heat Transfer Operations Machining topic.
1. The important design and operating considerations for Extended-Surface Compact Heat Exchangers are:
(1) Both fluids may have high or low heat transfer coefficients
(2) As the tubes are very narrow (low DH), the fluid used should not be corrosive as effective cleaning of tubes is not possible.
(3) The fluid pressure drop calculation is important as a regulatory method to ensure long life of the tubes.
(4) Unlike shell and tube type heat exchangers, these are limited when it comes to operating pressure and temperature.
(A) (1), (2), (3), (4)
(B) (1), (4)
(C) (2), (3), (4)
(D) (1), (2)
Explanation: For the design of Extended-Surface Compact Heat Exchangers, the given statements 2, 3, 4 are correct and important. Atleast one fluid should have low heat transfer coefficient and we should consider cleaner fluid to avoid clogging of narrow pipes.
2. Velocity profile in a pipe is independent of axial position whereas Temperature Profile is not.
Explanation: When a fluid flows through a pipe, the wall effect acts on it and eventually after some time the velocity profile gets fully developed, which is independent of axial position and depends only on radial position. Though this is not the case with Temperature profile in a fluid flowing through a constantly heated pipe, it depends on both axial and radial positions.
3. Which one of the following heat exchanger is best suited for high turbulent flow, is very compact and can handle foul liquids?
(A) Gasketed Heat Exchanger
(B) Brazed Plate type Heat Exchanger
(C) Platular Heat Exchanger
(D) Lamella Heat Exchanger
Explanation: Brazed Plate Heat Exchanger is one of the best designs of Heat Exchanger which can handle the high turbulent flow, which prevents scaling and fouling, is very compact and requires much less space than Gasketed type Heat Exchanger.
4. When gas is used as a fluid in a double pipe heat exchanger, which one of the following is not true?
(A) The gas side has a low heat transfer coefficient
(B) Extended fins are used on the gas side to increase the Heat Transfer coefficient
(C) The gas side heat transfer coefficient is the highest
(D) Fins increase necessary heat transfer area
Explanation: Fins are generally used to increase the Heat transfer Area when the heat transfer coefficient on that fluid side is comparatively low. Hence as gases usually have lower heat transfer coefficients, fins are kept on this side.
5. Which of the following statements are incorrect about Baffles in a Shell and Tube HE?
(A) Baffles provide mechanical support to the tubes and help them to be in position
(B) Baffles streamline the motion of the fluid in Shell side and hence decreases the turbulence
(C) The most common type of baffle is segmental baffles
(D) Baffles increase the overall heat transfer coefficient on the shell side
Explanation: One of the important tasks of a baffle is to increase the turbulence on the shell side so that forced convective effect successfully plays its role and increase the overall heat transfer coefficient. It also holds the tubes in their position as well to provide them with mechanical support.
Practice the full set of Heat Transfer Operations Multiple Choice Questions before applying for the internship.
How to apply for the Heat Transfer Operations Internship
1. Read the Sanfoundry Internship FAQs
2. Take the Heat Transfer Operations Internship Test
3. Submit the Internship Application Form
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