7/21/2019 kks gsr ment http://slidepdf.com/reader/full/kks-gsr-ment 1/16 1 SORAN UNIVERSTY SCHOOL OF ENGINEERING FACULTY OF PETROLEUM ENGINEERING Linear Heat conduction Transort P!eno"ena La# Prepared by: Reband Azad Raza Dyar Abdullah Mohammed muhsin Supervised by: Dr.Rebwar koyi Date 12!"2!1# 1
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The aim of this experiment is to measurement linear thermal along z direction conductivity andto investigate and verify Fourier’s Law for linear heat conduction along z direction.
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&ntrodu'tion
The heat conduction unit consist of electrically heated module mounted on a %ench support
frame. The module contains a cylindrical metal %ar arrangement for a variety of linear
conduction experiments. Test section is e&uipped with an array of temperature sensors. 'ooling
water, to %e supplied from a standart la%oratory tap, is fed to one side of the test pieces in order
to maintain a steady gradient. The instrumentation permits accurate measurement of temperature
and power supply. Fast response temperature pro%es, with a resolution of .)', give direct
digital readout in )'. The power control circuit provides continuously varia%le electrical output
of * Watts with direct readout, 'onduction is defined as the transfer of energy from more
energetic particles to ad+acent less energetic particles as a result of interactions %etween the
particles. n solids, conduction is the com%ined result of molecular vi%rations and free electron
mo%ility. -etals typically have high free electron mo%ility, which explains why they are good
heat conductors. 'onduction can %e easily understood if we imagine two %locs, one very hot
and the other cold. f we put these %locs in contact with one another %ut insulate them from the
surroundings, thermal energy will %e transferred from the hot to the cold %loc, as evidenced %y
the increase in temperature of the cold %loc. This mode of heat transfer %etween the two solid
%locs is termed /conduction.
(heory :
f a plane wall of thicness (0x$ and area (1$ supports a temperature difference (0T$ then the
heat transfer rate per unit time (2$ %y conduction through the wall is found to %e 3
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it is necessary to find the temperature distri%ution through the solid and how the distri%ution
varies with time. 8sing the e&uipment set*up descri%ed a%ove, it is a simple matter of monitoring
the temperature profile variation during either a heating or cooling cycle thus
Facilitating the study of unsteady state conduction. 9:;
Fig. 2.3: Layout for Linear Heat Conduction Test Specimen (tafan,2010)
Fig. 2.4: Module for Linear Heat Conduction Test Specimen (M. Tirumales!ar )
Te rate of linear conduction eat transfer for tis system ("i#. $.1):
%ere,
& ' Termal conductiity
4
( ) B At
t x T T L
Ak
dx
dT Ak q −=−=
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' Cylindrical area of specimen
L ' Heat traelin# distance
T ' Temperature near eater
T* ' Temperature furter eater
Pro'edure:
• Turn on t!e 9ater su0) and ensure t!at 9ater is :o9in+ %ro" t!e %ree
end o% t!e 9ater iet o drain' T!is s!ou0d #e c!ec,ed at inter;a0s'
• Rotate t!e !eater o9er contro0 on t!e e0ectrica0 conso0e to t!e %u00)
anti<c0oc,9ise osition'
• Set t!e "ains ON=OFF s9itc! ON osition 9!en t!e di+ita0 readouts 9i00
#e i00u"inated'
• T!e te"erature 9i00 #e indicated on t!e te"erature readout
•
Set t!e !eater o9er on t!e 9att"eter
• Se0ect te"erature 1 on se0ector s9itc!
• T!e te"erature 9i00 no9 increase as t!e end o% t!e 0inear "odu0e is
!eated
• Se0ect te"erature $ on se0ector s9itc! and note t!at t!e indicated