Determination of a System’s Entropy Using Pyroelectric Sensors

Cita com:
hdl:2117/86548
Document typeArticle
Defense date2015-12
Rights accessOpen Access
Abstract
We propose a system for measuring entropy
variations, S, in thermal systems using pyroelectric sensors.
These sensors convert time-dependent temperature variations
into electrical current. Consequently, heat and temperature
variations are obtained, and sensor entropy is inferred. Various
polyvinylidene fluoride and lead zirconate titanate sensors have
been tested. Two types of measurements are performed. One in
the volume, to measure entropy variations in a heat source, and
the other on the surface, to measure entropy flux delivered by the
heat source. Thermodynamic models and heat transfer dynamic
simulations agree with the experimental results and relate the
sensor entropy to the heat source entropy. These results show that
pyroelectric sensors can enable entropy monitoring of thermal
processes to improve system performance.
CitationCuadras, A., Ovejas, V.J. Determination of a System’s Entropy Using Pyroelectric Sensors. "IEEE sensors journal", Desembre 2015, vol. 15, núm. 12, p. 6890-6897.
ISSN1530-437X
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