Thermal Conductivity Of Metal Rod
Product Code : EL-HTL-11094
Quick answer: The thermal conductivity of metal rod apparatus finds the conductivity of a 25 mm diameter copper bar. A band heater warms one end, a water-cooled sink takes heat from the other, and eight thermocouples record the temperature gradient along the insulated bar. It teaches one-dimensional steady-state conduction. Lab Exports manufactures it in Delhi for engineering colleges, polytechnics and TVET institutes.
Specifications
| Component | Specification |
|---|---|
| Test bar | Copper, 25 mm diameter, insulated test section |
| Thermocouples | 8 nos., along the bar length |
| Heat source | Band heater at one end |
| Heat sink | Water-cooled, at the opposite end |
| Heater control | Dimmerstat, 0-230 V, 2 A |
| Instruments | Voltmeter, ammeter, multichannel digital temperature indicator |
| Water flow measurement | Measuring flask and stop clock |
| Services | 230 V AC with earthing; water about 2 litres per minute |
How the thermal conductivity experiment is done
Heat flows along the bar from the heated end to the cooled end. With the sides insulated, radial loss is small and the flow is close to one-dimensional, so Fourier's law applies: Q = k x A x (dT/dx), where A is the cross-sectional area of the bar and dT/dx is the temperature gradient along it.
The heat reaching the sink is found from the cooling water: Q = m x cp x (rise in water temperature). Plotting the eight thermocouple readings against position gives the gradient, and k = Q / (A x dT/dx). The voltmeter and ammeter readings give the heater input for comparison with the heat collected.
- Start the cooling water through the heat sink at a steady rate.
- Switch on the band heater and set the input with the dimmerstat.
- Wait for steady state, when the thermocouple readings stop changing.
- Record the eight bar temperatures and the rise in cooling water temperature.
- Measure the water flow with the measuring flask and stop clock, then calculate k.
Key features
- Copper test bar of 25 mm diameter with an insulated test section
- Eight thermocouples along the bar to map the axial temperature profile
- Band heater with dimmerstat control, 0-230 V, 2 A
- Water-cooled heat sink for measuring the heat conducted
- Voltmeter and ammeter for heater input power
- Panel carrying the controls and meters for easy operation and sturdy mounting
Documentation and supply
Installation instructions and a manual are supplied with the apparatus. Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the thermal conductivity apparatus at its works in Laxmi Nagar, Delhi, and supplies it to engineering colleges, polytechnics and TVET institutes in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Heat Transfer Lab products
- Plate Type Heat Exchanger Apparatus (EL-HTL-11093)
- Shell Tube Heat Exchanger Water to Water (EL-HTL-11092)
- Concentric Tube Heat Exchanger (EL-HTL-11091)
- Critical Heat Flux Apparatus (EL-HTL-11090)
- Stefan-Boltzmann Apparatus (EL-HTL-11089)
- Emissivity Measurement Apparatus (EL-HTL-11088)
The full range is in the Heat Transfer Lab section of the Engineering Lab range.
Frequently asked questions
How many thermocouples are fitted on the bar?
Eight thermocouples are placed along the length of the copper bar and read on a multichannel digital temperature indicator.
Why is the test section insulated?
Insulation cuts radial heat loss, so the measured heat flow is mainly axial conduction and the calculated conductivity is closer to the true value.
What is the price of the thermal conductivity apparatus?
Prices are not published on the website. Add the thermal conductivity apparatus to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-HTL-11094 and the quantity, to receive a quotation.
Does Lab Exports manufacture the thermal conductivity apparatus?
Yes. Lab Exports manufactures the thermal conductivity apparatus at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-HTL-11094.
Request a quote
Email [email protected] with the house code EL-HTL-11094 and the quantity, or add the thermal conductivity apparatus to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.