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. 2024 Nov 14;24(22):7269.
doi: 10.3390/s24227269.

Novel, Cost Effective, and Reliable Method for Thermal Conductivity Measurement

Marian Janek  1 , Jozef Kudelcik  1 , Stefan Hardon  1 , Miroslav Gutten  2
Affiliations

Novel, Cost Effective, and Reliable Method for Thermal Conductivity Measurement

Marian Janek et al. Sensors (Basel). .

Abstract

This study describes the development and utilization of a novel setup for measuring the thermal conductivity of polyurethane composites with various nanoparticle contents. Measurements were conducted using both an experimental setup and a professional instrument, the TPS 2500 S, with results demonstrating high agreement with the precision of the measurements. The setup was further validated using a standard reference material with a thermal conductivity of 0.200 W/m/K. Additionally, the reliability of the setup was confirmed by its stability against ambient temperature variations between 20 and 30 degrees Celsius. This research presents a cost-effective method for measuring the thermal conductivity of polyurethane composites. Data processing involves noise reduction and smoothing techniques to ensure reliable results. The setup offers 5% accuracy and proves to be versatile for both research and educational applications.

Keywords: high-current source; low-current source; thermal conductivity coefficient.

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Conflict of interest statement

The authors declare no conflicts of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.

Figures

Figure 1
Figure 1
A schematic illustrating part of the experimental setup.
Figure 2
Figure 2
Diagram summarizing the entire experimental setup.
Figure 3
Figure 3
Low-current source scheme for thermistor.
Figure 4
Figure 4
High-current source for R4 heating element.
Figure 5
Figure 5
Recommended TC7660 configuration.
Figure 6
Figure 6
High-current source: linear dependence of input voltage on output voltage (current) up to approximately 3.2 V.
Figure 7
Figure 7
Control programming interface.
See this image and copyright information in PMC

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