In a triple effect evaporator, the heat transfer for an evaporator is calculated as q = UA (TI – TF) where TI is the initial temperature, TF is the final temperature; U and A are constants. Given that heat transfer for the first evaporator : q(1) = UA (TI – TB); second evaporator : q(2) = UA (TB – TC); third evaporator : q(3) = UA (TC – TF) where q(x) is the heat transfer function, TB is the temperature of second inlet and TC is the temperature of third inlet, prove that the overall heat transfer Q = q(1) q(2) q(3) = UA (TI – TF).

1 Answers  

---

why back washing is performed in DM water plant?

2 Answers  

---

REACTION ENGINEERING - EXAMPLE 13.3 : The half-life for first order reaction could be described in the differential equation dC / dt = -kC where k is a constant, C is concentration and t is time. (a) Find the equation of C as a function of t. (b) Find the half life for such reaction or the time required to reduce 50 % of the initial concentration, where k = 0.139 per minute. (c) When the initial concentration Co is 16 mol / cubic metre, how long does the reaction required to achieve the final concentration of 1 mol / cubic metre?

1 Answers  

---

Under what circumstances are vortex flowmeters the most accurate?

0 Answers  

---

What are the steps required to design a vapor-liquid separator or flash drum?

0 Answers  

---

What are the effects of oils on the properties of Polyolefins?

0 Answers   IOCL,

---

I am writing the chemical engineering subject test for Reliance India Limited. Could someone who has taken the test please list some of the questions from that paper?

2 Answers  

---

Explain can large temperature differences in vaporizers cause operational problems?

0 Answers  

---

For a heat exchanger, will the overall heat transfer coefficient increase along with an increase in lmtd (log mean temperature difference) around the unit?

0 Answers  

---

R sir, i need placement paper of last years of IOCL in chemical sream...... send me the question paper as soon as possible on my email address.

18 Answers   ABC, IOCL, ONGC,

---

Part time jobs for engineer students working or studying

2 Answers  

---

respected sir,i have been selected in the written examination prelim (CHEMICAL) of RINL(RASHTRIYE ISPAT NIGAM LTD.) held on 20 JUNE, So please tell me which type of questions will be asked in 2nd stage written exam. plz send me last 2-3 years questions asked in RINL(written exam).

1 Answers  

---