In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer coefficient (hi) vanishes after a Reynold number of_____________?
Correct answer: D. 10000
- A. 1000
- B. 3000
- C. 5000
- D. 10000
Explanation
Entrance and developing-flow effects influence the inside film coefficient at lower Reynolds numbers, but their effect becomes negligible in ordinary turbulent tube flow above about Re = 10,000. Thus the length-to-diameter ratio no longer significantly changes the coefficient at that point.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Heat Transfer Operations
645 free Heat Transfer Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Heat Transfer Operations questions
The value of fouling factor depends upon the__________________?
Which of the following lengths of heat exchanger tubes are normally not used in practice ?
Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is_____________?
Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about _____________ kcal/hr.m2.°C?
In a heat exchanger, shell side fluid velocity can be changed by changing the tube _______________________?
In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of ________________ mm?