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PID-Based Thermal Control in Heat Conduction Micro-Calorimeters

[+] Author Affiliations
Arturo Pacheco-Vega

California State University-Los Angeles, Los Angeles, CA

Luis Enrique Vilchiz-Bravo

Universidad Autonóma de Yuctán, Mérida, YUC, México

Brent E. Handy

Universidad Autonóma de San Luis Potosí, San Luis Potosí, SLP, México

Paper No. IMECE2010-37093, pp. 683-690; 8 pages
doi:10.1115/IMECE2010-37093
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4429-8
  • Copyright © 2010 by ASME

abstract

Strategies based on the principle of heat flow and temperature control were implemented, and experimentally tested, to increase the sensitivity of a Tian-Calvet microcalorimeter for measuring heats of adsorption. Here, both heat-flow and temperature control schemes were explored to diminish heater-induced thermal variations within the heat sink element hence obtaining less noise in the baseline signal. PID controllers were implemented within a closed-loop system to perform the control actions in an calorimetric setup. The experimental results demonstrate that the heat flow control strategy provided a better baseline stability when compared to the temperature control. A modified control strategy is then suggested to maintain a stable core temperature and signal noise level in the system.

Copyright © 2010 by ASME

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