Assignment Task:

Shell and Tube Heat Exchanger Design project

1. Problem Statement & Scope of Work
Ethylbenzene is manufactured by alkylation of benzene with ethylene. The reaction products are separated in a series of distillation columns. Ethylbenzene is obtained as the distillate from the last column (called the ethylbenzene column). In a 70 ton per day ethylbenzene plant, the final product leaves the overhead condenser at 135 degree C. This is required to be cooled to 40 degree C before pumping it to the storage tank. Cooling water is available at 30 degre C for cooling. Please provide a proposal for the design of a multi-pass counter-current Shell & Tube Heat Exchanger (Figure-1) that fulfils the specifications in Section 3 (Process Data) and includes the following items:

Item 1: 
Do energy balance and find heat duty (Q) and water flow rate

Item 2: 
First start trial with 1-1 pass counter current exchanger and do LMTD calculation and find out area, assuming overall heat transfer coefficient based on outside area, Udo

Item 3: 
Select tube BWG (i.d, o.d and length) from available market and number of tubes required and linear velocity of water (a velocity above 1 m/s should be maintained).Do selection of tube side and shell side fluid with proper justification

Item 4: 
Start second trial with suitable tentative selection of tube passes (say 1-4 pass) and repeat calculation and find out tube specifications and number of tubes (You may use Tubesheet layout and tube count of a shell and tube heat exchanger Table which are available in standard data book)

Item 5: 
Select 25% cut segmental baffles with 0.15 m (6 inch) baffle spacing and shell specification

Item 6: 
Estimate the tube-side and shell-side heat transfer coefficient (hi) using any suitable correlation. Number of correlations are available such as Dittus-Boelter equation, Colburn jH factor etc. At this stage there are number of decision options on baffle spacing, number of tube passes etc are available to get reasonably high local heat transfer coefficients.

Item 7: 
Calculate the ‘clean’ Overall coefficient, U on the outside tube area basis. and repeat the above calculation to get area required, tube specifications, number of required tubes. Neglect dirt factor calculation for U.


This Engineering Assignment has been solved by our Engineering Experts at UniLearnO. Our Assignment Writing Experts are efficient to provide a fresh solution to this question. We are serving more than 10000+ Students in Australia, UK & US by helping them to score HD in their academics. Our Experts are well trained to follow all marking rubrics & referencing style.

Be it a used or new solution, the quality of the work submitted by our assignment experts remains unhampered. You may continue to expect the same or even better quality with the used and new assignment solution files respectively. There’s one thing to be noticed that you could choose one between the two and acquire an HD either way. You could choose a new assignment solution file to get yourself an exclusive, plagiarism (with free Turnitin file), expert quality assignment or order an old solution file that was considered worthy of the highest distinction.

Eureka! You've stumped our genius minds (for now)! This exciting new question has our experts buzzing with curiosity. We can't wait to craft a fresh solution just for you!

  • Uploaded By : Alex Cerry
  • Posted on : June 15th, 2019

Whatsapp Tap to ChatGet instant assistance