heat transfer, Chemistry

Assignment Help:
54) Note: This problem is worth double credit.It is desired to concentrate a caustic soda solution from 12.5 to 40.0% in a double-effect evaporator. Feed solution at a flow rate of 50,000 lb/h enters the evaporator at 120?F, and steam at 15 psig is available to concentrate this solution. Pressure in the vapor space of the second effect is kept at 5.92 in Hg absolute (24 in Hg vacuum), and water at 85?F from a cooling tower is available to condense the vapor from the second effect. For backward feed operation, calculate the
(a) steam flow rate required.
(b) steam economy.
(c) area per evaporator effect.
(d) cooling water flow rate required, assuming the water should be returned to the cooling tower no hotter than 125?F.
The overall heat transfer coefficients for the two effects are 350 and 450 Btu/h•ft2•?F, respectively.Answers:(a)21,400 lb/h(b)1.61(c)1960 ft2(d) 421,000 lb/h

Related Discussions:- heat transfer

Charles law, a bacterial culture isolsted from sewaga produces36.4cm of met...

a bacterial culture isolsted from sewaga produces36.4cm of methane gas at 27C and 760mmHg this gas occupies 33124cm at 0c and same pressure explainvolume temperature relation ship

Define the methods of shelf life examination, Q. Define the Methods of shel...

Q. Define the Methods of shelf life examination? Methods of shelf life examination are sensory evaluation, chemical analysis and microbiological analysis.

Acidic nature of monocarboxylic acids, Acidic nature of monocarboxylic acid...

Acidic nature of monocarboxylic acids (1) Cause of acidic nature (a) A atom of carboxylic acid may be illustrated as a resonance hybrid of the following structures.

You, one two three four get on the dance floor..

one two three four get on the dance floor..

The expression for bohr''s radius of an atom is, The expression for Bohr's ...

The expression for Bohr's radius of an atom is: (1) r= n 2 h 2 / 4 Π 2 me 4 z 2                         (2) r= n 2 h 2 / 4 Π me 2 z 2           (3) r=  n2h2/4 Π me 3

Reaction during electrovalent bond formation, The main reaction during elec...

The main reaction during electrovalent bond formation is: (1) Redox reaction (2) Substitution reaction  (3) Addition reaction (4) Elimination reaction Ans: Redox re

Nitrogen, why nitrogen act as inert gas

why nitrogen act as inert gas

How to calculate atomic mass of an element, Q. How to calculate atomic mass...

Q. How to calculate atomic mass of an element? Copper survive as a mixture of two isotopes. The lighter isotope (Cu-63) amid 29 protons and 34 neutrons makes up 69.17% of coppe

Explain the hydrogenation, Which of the following rate equations is correct...

Which of the following rate equations is correct, if the hydrogenation of  the adsorbed intermediate is the slowest step of the reaction?   When zinc oxide is used as

The molecular formula of chloride of a metal m, The molecular formula of ch...

The molecular formula of chloride of a metal M is  MCl3 The formula of its carbonate would be: (1) MCO 3                                                    (2) M 2 (Co

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