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**HEAT TRANSFER: HEAT EXCHANGER**

Oil flows in a heat exchanger with a mass flow rate of 20 kg/s
and is to be cooled from 175 to 65°C with water as a coolant
flowing at a rate of 30 kg/s and an inlet temperature of 12°C. The
overall heat transfer coefficient is U = 1250
W/m^{2}⋅K.

a) Sketch the temperature profile and calculate the mean temperature for parallel flow, counter flow, and cross flow heat exchangers..

b) Determine the area required to sustain the heat transfer for each heat exchanger stated in (a) Comment on your answer.

c) If fouling with thickness of 2 mm happens on the tubes side,
determine the new heat transfer coefficient and evaluate the
effectiveness of a 45 m length counter flow heat exchanger before
and after fouling. Specific heat capacity of oil and water is given
as c_{p, oil} = 2058 J/kg⋅K and c_{p, water} = 4184
J/kg⋅K. Conductivity of fouling is taken as k_{f,I} = 11
W/m⋅K.

A double-pipe heat exchanger is designed as an engine oil
cooler. The flow rate of oil is 5 kg/s, and it will be cooled from
60°C to 40°C through annulus (ID = 0.10226 m, OD = 0.1143 m). Sea
water flows through the tubes (ID = 0.02664 m, OD = 0.03340 m) and
is heated from 10°C to 30°C. The number of bare tubes in the
annulus is 3, and the length of the hairpin is 3 m. Assume that...

Performance evaluation of cold tube heat exchanger for
various L/D ratio and mass flow rate. using Ansys show
the temperature distribution. and make a mathematical
model in scilab and perform simulation in fortran 77...

LMTD of a cross-flow heat exchanger is

A counter-flow double-pipe heat exchanger is to heat water from
20ºC to 80ºC at a rate of 1.2 kg/s. The heating is to be
accomplished by geothermal water available at 160ºC at a mass flow
rate of 2 kg/s. The inner tube is thin-walled, and has a diameter
of 1.5 cm. If the overall heat transfer coefficient of the heat
exchanger is 640 W/(m2.ºC), determine the length of the
heat exchanger required to achieve the desired heating using the
effectiveness-NTU...

Heat transfer
In a test in a double tube heat exchanger the following data are
obtained
For hot fluid
Flow = 11.6 gal / sec
Outlet temperature = 30.1 ° C
Inlet temperature = 32 ° C
For cold fluid
Flow 11gal / min
Outlet temperature 25.1 ° C
Inlet temperature 24.2 ° C
For the fluid consider
k = 0.49 w / mK
cp = 3729.95 J / kgK
Prandtl number = 14.29
Density = 1035.02kg / m3
Get:...

A heat exchanger is used to transfer heat from a steam stream to
a chlorine gas stream. 100 kg of steam at 1 bar and 250°C enters
the heat exchanger and leaves the exchanger as saturated steam at 1
bar. Chlorine gas enters the exchanger at 1 bar and 33.0°C and
leaves the exchanger at 132.0°C. Assume the heat exchanger is
adiabatic.
A)What is the specific enthalpy of the inlet steam stream? (Use
liquid water at 0.01°C as a reference...

What is the therotiacal And The expertmatla heat transfer
cofficnent for heat exchanger in my case shell and tube
Therotical ?
formual ??
expermantial ?
formula ?
I am uisng LMTD method

Heat transfer
in a test in a double tube heat exchanger the following data are
obtained
For hot fluid
Flow = 11.6 gal / sec
Outlet temperature = 30.1 ° C
Inlet temperature = 32 ° C
For cold fluid
Flow 11gal / min
Outlet temperature 25.1 ° C
Inlet temperature 24.2 ° C
For the fluid consider
k = 0.49 w / mK
cp = 3729.95 J / kgK
Prandtl number = 14.29
Density = 1035.02kg / m3
Get:...

define heat exchanger mechanical flow switch

A shell-and-tube heat exchanger heats oil from 2°C to 35°C using
hot water. The oil flows in the shell in a single pass. Water flows
in 5 copper tubes with a total (all tubes) rate of 0.5 kg/s. Each
tube makes 4 passes through the shell and the length per pass is 4
m. The tube inner and outer diameters are 15 mm and 19 mm. The
water enters at 95°C and leaves at 29°C.
1. Estimate the average convection...

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