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

Determine about the line and surface imperfection, Determine about the Line...

Determine about the Line and Surface Imperfection Line imperfection:   Displacement with a curved boundary produces a mixed dislocation line at the boundary. Surface Imp

What is dielectric strength, What is dielectric strength Dielectric st...

What is dielectric strength Dielectric strength-  It's the maximum voltage/field gradient (voltage per unit thickness) which the dielectric can withstand without failure/brea

Degree of hardness, DEGREE OF HARDNESS:   The degree of hardness o...

DEGREE OF HARDNESS:   The degree of hardness of water is conveniently expressed in terms of equivalent amount of CaCO 3 . Although hardness of water is never present in th

Acidity of alcohol and phenol, observation reaction of alcohol and phenol w...

observation reaction of alcohol and phenol with sodium hydroxide

The electronic configuration of element with atomic number, The electronic ...

The electronic configuration of element with atomic number 24 is : (1) 1s 2 2s 2 2p 6 3s 2 3p 6 3d 4 4s 2       (2) 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10         (3)

Alpha-particle scattering experiment proved that atom, Rutherford's α parti...

Rutherford's α particle scattering experiment proved that atom has: (1) Electrons (2 )Neutron (3) Nucleus    (4 )Orbitals Ans: Nucleus

Equilibria, Equilibria Equilibrium can also exist in between the same s...

Equilibria Equilibrium can also exist in between the same species in two different forms e.g. liquid and solid, liquid and gas. An equilibrium constant may also be produced for

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