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Vol. 100, Issue 1, January 2009, pp.65-71

 

 

Bullet

 

A PC-based Technique to Measure the Thermal Conductivity of Solid Materials

 

1ALETY Sridevireddy, 2K. Raghavendra Rao

1Department of Electronics, 2Department of Physics

Sri Krishnadevaraya University, Anantapur, Andhra Pradesh, India, 515055

E-mail: aletysridevireddy@yahoo.co.in

 

 

Received: 26 October 2008   /Accepted: 19 January 2009   /Published: 26 January 2009

 

Abstract: A PC-based technique to measure the thermal conductivity of a bulk material using steady-state one-dimensional heat flow technique is developed. The system uses a small metal rod as a sample and PT100 RTD sensors for temperature measurement. The output of the sensor is signaling conditioned and linearised using a special analog hardware. This linearised RTD output is fed to the analog input of the ADC through a multiplexer, which is interfaced to an IBM compatible PC through digital I/O card. A special constant current source circuit is designed for heating the sample. Software is developed in C-language. Thermal conductivity of two samples (Copper and Aluminum) was measured.

 

Keywords: Thermal conductivity, PT100 RTD sensor, Signal conditioning, Constant current source

 

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