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

Transitions between energy levels, A red flame is produced when LiCl is hea...

A red flame is produced when LiCl is heated. How can I determine which transition between the energy levels produces this colour?

What is the iupac name of carbon?, IUPAC name is given to compounds. Carbon...

IUPAC name is given to compounds. Carbon is an element so it will bw called as carbon only. eg. hydrocarbons - CH4=methane                            C2H6=Ethane

What do you mean by permissible level, Q. What do you mean by Permissible l...

Q. What do you mean by Permissible level ? To regulate and enforce safety about the use of these synthetic colours and dyes PFA, 1954 has covered their use in part IV comprisin

Resonance, what are the applications of resonance effect

what are the applications of resonance effect

Calculate the amount of glycine in the mixture, Calculate the amount of gly...

Calculate the amount of glycine in the mixture: Isotope dilution analysis was employed for the determination of glycine in 5.83 g protein hydrolysate mixture by using 14 C l

Stoichiometry Review, The combustion of propane occurs via the reaction: C3...

The combustion of propane occurs via the reaction: C3H8(g)+5O2(g)-->3C02(g)+4H2O(g) Hoe many grams of oxygen are required to burn completely 10.0g of propane?

The quantum numbers for the outermost electron of an element, The quantum n...

The quantum numbers for the outermost electron of an element are given below as n= 1, l=0, m=0, s = 1/2  . The atoms is: (1) Lithium (2) Beryllium (3) Hydrogen     (4)

Polonium crystallizes in a simple cubic unit cell, polonium crystallizes in...

polonium crystallizes in a simple cubic unit cell with an edge length of 3.36A. 1. what is the volume of the unit cell? 2. what is the volume of atom in the unit cell? 3. what i

Elements, which element is the largest size halogen.

which element is the largest size halogen.

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