AL_Nahrain University
College of Engineering
Mechanical Engineering
Department
Steady State Thermal Conduction
Mustafa Saadi Jbair
Third Stage
2021-2022)
Aim
- Experimentally test the thermal conductivity of
different metals
-Understanding the process of steady state heat
conduction
preparation and Procedure for the
experiment
1- Set the desired heating temperature on the
controller. A temperature between 60°C and 80° has
proven to be useful.
2- Set the cooling water flow. The flow is read on the
edge of the ball of the flow meter. The best cooling
water flow depends on the type of specimen. The
values have been proven in table -1.
3- Wait for the thermal steady state condition. Since
the precision of the calculated heat flow is negatively
influenced by too small a difference in temperature
between T5, and and too small a flow, the cooling
water flow may have to be adjusted.
4- Then the temperatures can be recorded using the
measuring point selector.
Discussion
1-
For the sample
Al, the length decreases with increasing temperature
In the sample cu, the length decreases by a small
amount as the temperature increases
In the sample, Ms, the length decreases as the
temperature increases
2-Steady-state methods
In general, steady-state techniques make a
measurement when the temperature of the measured
substance does not change over time.
In geology and geophysics, the most common method
for consolidated rock samples is the divided bar.
There are various modifications to these devices
depending on the temperatures and pressures
needed as well as sample sizes.
Other steady-state methods
For good conductors of heat, Searle's bar method can
be used. For poor conductors of heat, Lees' disc
method can be used.
3-It is used to incubate samples in water at a constant
temperature over a long period of time.
4-Elevated water storage tanks are used to store
water for fire protection and potable drinking water
within a designated area or community. Elevated
tanks allow the natural force of gravity to produce
consistent water pressure throughout the system.
5-Common sources of error include means,
environmental, procedural, and human.