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 a calorimetric setup. The experimental results demonstrate that the heat flow control strategy provided a better baseline stability when compared to the temperature control. The effects on the results stemming from the type of power supply used were also investigated. © 2010 IOP Publishing Ltd.

authors

• Handy Vogel Brent Edward
• Pacheco-Vega A.
• Vilchiz L.E.

publication date

• 2010-01-01

published in

• Measurement Science and Technology  Journal

keywords

• Baseline stability; Heat flow control; Temperature control; Tian-Calvet calorimeter Calorimeters; Closed loop systems; Flow control; Heat transfer; Three term control systems; Baseline stability; Calvet calorimeter; Control actions; Detection limits; Heats of adsorption; PID controllers; Thermal variation; Tian-Calvet microcalorimeters; Temperature control

Digital Object Identifier (DOI)

• 10.1088/0957-0233/21/11/115103

start page

end page

volume

• 21

issue

• 11