Equation for heat transfer rate

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SUMMARY

The discussion centers on calculating the heat transfer rate (Q") for measuring the thermal conductivity of woody pellets using the Peltier effect. The fundamental equation presented is Q" = kA(Δt/Δl), where k represents thermal conductivity, A is the area, Δt is the temperature difference measured with a thermocouple, and Δl is the length of the pellet. The user proposes an alternative method to calculate Q" using voltage and current from the power supply to determine resistance (R), suggesting the equation Q" = ΔT/R. The user is seeking confirmation on the validity of this approach.

PREREQUISITES
  • Understanding of thermal conductivity principles
  • Familiarity with the Peltier effect and thermoelectric devices
  • Knowledge of electrical resistance calculations
  • Experience with thermocouples and temperature measurement techniques
NEXT STEPS
  • Research the Peltier effect and its applications in thermal conductivity measurements
  • Study the relationship between voltage, current, and resistance in thermoelectric systems
  • Explore advanced methods for calculating thermal conductivity using experimental data
  • Investigate the use of different types of thermocouples for accurate temperature measurement
USEFUL FOR

Researchers, engineers, and students involved in thermal analysis, materials science, and thermoelectric device development will benefit from this discussion.

icecool8
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Hi,

I am trying to create an apparatus to measure the thermal conductivity of woody pellet based on peltier effect. the fundamental equation for thermal conductivity is Q"=kA(Δt/Δl), where k is thermal conductivity. A is the area of pellet, Δt is measured by using thermocouple and peltier plate and length of the pellet is known. However, I am not too sure how to calculate the Q" based on the information that I have, Could anyone give me some tips to find the Q" by using other parameters? The one I was think of is using voltage & current from the power supply to calculate the resistance (R) through the pellet , and Q" =ΔT/R, Can I use this equation? Thanks
 
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I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
 
Greg Bernhardt said:
I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?

I am still awaiting for the reply from my supervisor from uni to verify my assumption, but at this stage, I don't have answer...
 

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