Heat transfer, engineering, Other Engineering

Assignment Help:
A heat recovery device involves transferring energy from hot flue gases passing counter currently through an annular region to pressurized water flowing through the inner tube of the annulus. The inner tube has inner and outer diameters of 24 and 30 mm, respectively, and is connected by eight struts to an insulated outer tube of 60 mm diameter. Each strut is 3 mm thick and is integrally fabricated with the inner tube from carbon steel (k = 50 W/m K). Consider the situation for which water and flue gases enter the device at 300 K and 800 K, respectively. The flue gases may be assumed to have properties of air. The mass flow rate of water is 0.2 kg/s. The mass flow rate of flue gases at 1.0 kg/s. If the desired outlet temperature of the pressurized water is 350 K, determine:

i) The outlet temperature of flue gases
ii) The heat transfer coefficient at the water side
iii) The heat transfer coefficient at the air side
iv) The overall heat transfer coefficient based on the inside perimeter (Ui)
v) The required length of this heat recovery device
Hints: 1) The struts can be treated as rectangular fins with an adiabatic tip.
2) Assume a uniform heat transfer coefficient on the flue gas-side (ho).

Related Discussions:- Heat transfer, engineering

Lamination of plastics, Q. Write short note on laminating.           ...

Q. Write short note on laminating.                                                 OR    Explain the Laminating processes.

Infiltration enters, ways via which infiltration enters a sewer system

ways via which infiltration enters a sewer system

Zeroth law of thermodymanics, Explain with the aid of sketch of zeroth law ...

Explain with the aid of sketch of zeroth law of thermodynamics

Physical chemistry, can you answer some problem from physical chemistry wit...

can you answer some problem from physical chemistry with a detailed approach why and how one should choose the steps in solving them.These are just random question that I have no c

Fire risk assessment in usa - fire protection engineering, Fire risk assess...

Fire risk assessment in USA: The document NFPA 551:2010 is entitled Guide for the Evaluation of Fire Risk Assessments.   In this document is set out the American use of the

Methods of strengthen crystalline materials against plastic , Q. Describe t...

Q. Describe the four main methods of strengthen crystalline materials against plastic yield. Ans. (1) Work Hardening: Strain hardening or work hardening is a phenomenon which

#Corporate Finance Homework, #As an investment advisor you have been approa...

#As an investment advisor you have been approached by a client called Ramesh, who wants some help in investment related matters. Ramesh is currently 45 years old and has Rs 6, 00,

Fire safety log book, Fire safety log book: The occupier's fire safety...

Fire safety log book: The occupier's fire safety log book should be checked during an inspection to see that the system is being tested regularly and serviced and maintained a

Assignment on risk and return, Assignment on Risk and Return# Stock has bet...

Assignment on Risk and Return# Stock has beta of 1.5 & an expected return 11%. A risk free asset earns 2%. Determine the expected return on a portfolio that is equally invested in

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd