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

Calculate the density at maximum flow, (a)  A section of road has a free fl...

(a)  A section of road has a free flow speed of 55km/h and a jam density of 367 vehicles per kilometre. Assuming under a linear speed-density relationship, calculate the density at

Riser design, A riser or a feeder head is a passage of sand made in the cop...

A riser or a feeder head is a passage of sand made in the cope to permit the molten metal to rise above the highest point in the casting after the mould cavity is filled up. Risers

300 X zoom lens, How to calculate the field of views

How to calculate the field of views

Density correction factor, superheated steam flow measurement please provid...

superheated steam flow measurement please provide formula used for density correction factor

Define Thermal equilibrium, Thermal equilibrium The definition and measurem...

Thermal equilibrium The definition and measurement of temperature must be logically preceded by the concept of thermal equilibrium and the Zeroth law. To determine operationally wh

Finance ass, Let C(K) denote a European vanilla Call option with strike pri...

Let C(K) denote a European vanilla Call option with strike price K. Assume that all options are identical except for strike price, and strike prices satisfy (K1) What are the no-

Flow at low mach number and zero incidence about m6 wing, Flow at low Mach ...

Flow at low Mach number and zero incidence about M6 wing Results from FP were obtained corresponding to M ∞ = 0.2 and a = 0 and, as noted, with the input files generated by FP

Depreciation Tax Calculation, Depreciation Calculation Two most popular me...

Depreciation Calculation Two most popular methods of charging depreciation are: straight line and diminishing balance or written-down value (WDV) methods. For reporting to the sha

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