Contactless entropy measurement with infrared sensors for degradation monitoring
Entropy is a valuable magnitude to monitor degradation processes and energy efficiency. Since no commercial equipment is available to measure entropy, this paper proposes a new contactless entropy measurement system based on infrared sensors. Infrared radiation of a black body, such an electric resi...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/383500 |
| Acceso en línea: | https://hdl.handle.net/2117/383500 https://dx.doi.org/10.1016/j.sna.2022.113488 |
| Access Level: | acceso abierto |
| Palabra clave: | Entropy Entropy flow Contactless Degradation monitoring Entropy generation Entropia Àrees temàtiques de la UPC::Enginyeria electrònica |
| Sumario: | Entropy is a valuable magnitude to monitor degradation processes and energy efficiency. Since no commercial equipment is available to measure entropy, this paper proposes a new contactless entropy measurement system based on infrared sensors. Infrared radiation of a black body, such an electric resistor, is measured with four different types of commercial sensors. Transport thermodynamics in terms of entropy is experimentally inferred from temperature and radiated power. Entropy flow rate from the black body, entropy flow rate received by the sensor and entropy generation rate during the transport process are evaluated. A simple and inexpensive electronic set-up is used to measure degradation in the resistor, which was powered above its power rating. A relationship between entropy flow rate and resistor degradation is found. The degradation modes, i.e., fatigue and failure, in the resistor can be distinguished using contactless entropy flow measurements. |
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