Heat transfer, engineering, Other Engineering

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).
Posted Date: 3/28/2012 7:29:10 PM | Location : United States







Related Discussions:- Heat transfer, engineering, Assignment Help, Ask Question on Heat transfer, engineering, Get Answer, Expert's Help, Heat transfer, engineering Discussions

Write discussion on Heat transfer, engineering
Your posts are moderated
Related Questions
Duct With Flow Control-Aircraft maintenance: BERNOULLI'S THEOREM This theorem can be related to the relationship between pressure and velocity existing in the air flowing

I am a chemical engineering foundation year. I need your help with my homework, its 3D sketch by using Google sketchup program?? I have not use it before. Or any other 3D sketch p

We recall the "typical section" aerofoil model with oscillating pitching and plunging motions to represent the torsional and bending behaviour of a wing structure with large aspect

Q. What are the ingredients of moulding components? Ans. Polymer Additives: One or more of the following materials are added to the polymers, either before or during poly

i got a msg from u is that Dear Tutor Congratulations!! You are successfully done with the process of quality check, now we are sending you the registration form

Imaging Seekers  Although there are a wide variety of imaging sensors (cameras), the majority of modern aircraft systems are based on conventional TV camera technologies (al

Q. The Electricity generation in Florida is 224,750GWh/y. What is the annual generation per capita? Knowing the population of Florida, the electricity generation per capita is 1

Aerospace propulsion is essentially based on Newton'slaws of motion (1687): • A body on which there is no resultant force will move ina straight line with constant velocity.

offer an explanation for why cracking might have occurred. Give at least three suggestion on how to prevent this type of corrosion. You may supple with appropriate figures

The operation of heating a green compact to an elevated temperature is known as sintering. It is a process by which solid bodies are bonded by atomic forces. It is carried out belo