SOLUTIONS TO TUTORIAL-5 ON RADIATION HEAT TRANSFER
Ans:
Ans:
Heat loss by radiation = 704 W/m2.
Rate of heat transfer by radiation = 841.2 W/m2
Ans:
Net radiation rate per metre length of pipe = 205 W/m
Ans:
W/m
Total heat loss by convection and radiation

PROCESS HEAT
TRANSFER
(EKB-2073)
Lecture Notes Compiled by Dr. Soundarajan Krishnan
RADIATION HEAT TRANSFER
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Kri

Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan

Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan

Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan

PROCESS HEAT
TRANSFER
(EKB-2073)
Lecture Notes Compiled by Dr. Soundarajan Krishnan
CORRELATIONS FOR HEAT TRANSFER BY
NATURAL OR FORCED CONVECTION
IN LAMINAR OR TURBULENT FLOW
Lecture Notes Compiled by Dr. Soundarajan Krishnan
HEAT TRANSFER BY NATURAL CON

PROCESS HEAT
TRANSFER
(EKB-2073)
Lecture Notes Compiled by Dr. Soundarajan Krishnan
HEAT TRANSFER WITH PHASE CHANGE
DROPWISE AND FILM-TYPE CONDENSATION
NUSSELT S CORRELATION
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Dropwise and film-type condens

SOLUTIONS TO TUTORIAL-4 ON CONVECTIVE HEAT TRANSFER
1. Thermic fluid flowing at a rate of 5000 kg/h is to be cooled from 423K to 363K by
circulating water at a rate of 15,000 kg/h. If the water is available at 303K, find the outlet
temperature of water.
D

Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Majority of applications of heat transfer in
Chemical Process Industries involve heat transfer
from a

Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan

SOLUTIONS TO TUTORIAL-2 ON HEAT TRANSFER BY CONDUCTION
(ACROSS COMPOSITE LAYERS OF SLABS, CYLINDERS OR SPHERES)
A. Heat conduction across composite layers of walls/slabs
1. A furnace is constructed with 230 mm thick of fire brick, 115 mm of insulating bri

PROCESS HEAT
TRANSFER
(EKB-2073)
Lecture Notes Compiled by Dr. Soundarajan Krishnan
MULTI PASS
HEAT EXCHANGER
(SHELL AND TUBE HX)
Lecture Notes Compiled by Dr. Soundarajan Krishnan
SIMPLE SHELL AND TUBE
HEAT EXCHANGER
Lecture Notes Compiled by Dr. Soundar

SOLUTIONS TO TUTORIAL-8 MORE PROBLEMS ON EVAPORATORS
1. What is the boiling point elevation (BPE) or (BPR) of the solution and the driving force for
heat transfer?
Data:
Solution boils at a temperature of 380K and boiling point of water at a pressure in
t

PROCESS HEAT
TRANSFER
(EKB-2073)
Lecture Notes Compiled by Dr. Soundarajan Krishnan
EVAPORATORS
Courtesy:
vamengineers.com
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr. Soundarajan Krishnan
Lecture Notes Compiled by Dr.

PROCESS HEAT
TRANSFER
(EKB-2073)
Lecture Notes Compiled by Dr. Soundarajan Krishnan
TUTORIAL 3 ON
CONVECTIVE HEAT
TRANSFER
Lecture Notes Compiled by Dr. Soundarajan Krishnan
1. A U-tube heat exchanger is required to cool 20 kg/s of
water from 360K to 340K

SOLUTIONS TO TUTORIAL-1 ON HEAT TRANSFER BY CONDUCTION
(ACROSS FLAT SLAB, HOLLOW CYLINDER OR HOLLOW SPHERE)
A. Heat conduction across a flat wall/slab/plate
1. Calculate the rate of heat loss Q through a wall of red brick [k = 0.7 W/(m.K)], 5 m in length,

PROCESS HEAT
TRANSFER
(EKB-2073)
Lecture Notes Compiled by Dr. Soundarajan Krishnan
NTU-EFFECTIVENESS
OF HEAT EXCHANGERS
Lecture Notes Compiled by Dr. Soundarajan Krishnan
For any Heat Exchanger:
Number of Transfer Units NTU = UA
Cmin
Heat capacity rate r

SOLUTIONS TO TUTORIAL-6 ON CONVECTIVE HEAT TRANSFER
1. Calculate the heat transfer area of 1-2 heat exchanger from the following data:
Data:
Inlet and outlet temperatures of hot fluid are 423K and 353K, respectively.
Inlet and outlet temperatures of cold

SOLUTIONS TO TUTORIAL-7 ON
NTU-EFFECTIVENESS OF HEAT EXCHANGERS
1. A cross-flow heat exchanger is being used to heat pressurised water by means of hot exhaust
gases. Water flows at the rate of 2.0 kg/s and is to be heated from 28C to 130C. Hot fluid
enter

SOLUTIONS TO TUTORIAL-3 ON CONVECTIVE HEAT TRANSFER
1. A U-tube heat exchanger is required to cool 20 kg/s of water from 360K to 340K by means of
25 kg/s of water entering at 300K. If the overall heat transfer coefficient is constant at 2000
W/(m2.K), cal

08-Oct-15
1
Dr. TVN. Padmesh
I
Donald R Coughnowr, Process Systems analysis and control, 2nd
Edition, Mc Graw Hill, 1991.
G. Stephanopoulos, Chemical Process Control: An Introduction
to Theory and Practice Prentice Hall, New Delhi 1984.
08-Oct-15
D.E.,