Linear heat conduction experiment Objectives To show heat
Linear heat conduction experiment
Objectives To show heat conducts linearly along a solid bar of uniform dimensions and materials 2. To show different materials in contact can affect liner heat transfer. 3. To show you can calculate the experimental thermal conductivity of the material in a solid bar. 4. To show thermal paste helps to give a good thermal connection. 1.
Introduction � Linear temperature gradient:
Thermal conductivity �
Equipment's � Base unit: TD 1002 Heat Transfer Experiments Base Unit
� TD 1002 a Linear Heat Conduction Experiment
Procedure � Standard brass material Connect and setup the liner heat conduction experiment (TD 1002 A). 2. Fit the brass middle section, using the heat transfer paste as described in using thermal paste. 1.
3. Create a blank results table. Experiment: Middle Section Material: Ambient Temperature: power (W) T 1(C) T 2(C) T 3(C) T 4(C) T 5(C) T 6(C) T 7(C) Distance from T 1(m) 0 0. 02 0. 04 0. 06 0. 08 0. 10 0. 12
4. 5. 6. 7. 8. Use accurate thermometer to check the local ambient air temperature for reference. Open the water outlet valve to start the water flowing, then switch on the heater and set to 30 watts power. Wait for the temperature to stabilize and then record T 1 to T 7. For the comparison, repeat the test at one or more heater powers greater than 30 W. Switch off the heater and the water supply.
Results � The relationship between the Temperature and Distance at power 30 watt 70 60 40 30 temperture 50 20 10 0 0, 14 0, 12 0, 1 0, 08 0, 06 Distance 0, 04 0, 02 0
� The relationship between the Temperature and Distance at power 40 watt 80 70 50 40 Temperture 60 30 20 10 0 0, 14 0, 12 0, 1 0, 08 0, 06 Distance 0, 04 0, 02 0
Calculation thermal conductivity at power 30 and 40 watt �
The relationship between the Temperature and Thermal conductivity at power 30 watt only at length =0. 02 m
180 160 120 100 80 60 Thermal conductivity (K) 140 40 20 0 8 7 6 5 4 Delta (T) 3 2 1 0
- Slides: 14