Direct Determination of the Volumetric Heat Capacity of Liquids using a MEMS Sensor and Efficient Evaluation Methods

Roman Beigelbeck, Samir Cerimovic, Franz Kohl, Thomas Voglhuber-Brunnmaier, Bernhard Jakoby

Research output: Chapter in Book/Report/Conference proceedingConference proceedingspeer-review

Abstract

In Beigelbeck et al [Meas. Sci. Technol. 22 105407, 2011], we presented a MEMS sensor containing two thin-film thermistors symmetrically arranged around a resistive heater and an associated measurement procedure to consecutively determine the thermal diffusivity and conductivity of liquids. In this contribution, we report an improved sensor design combined with two novel measurement methods featuring several distinctive advantages. First, the multi-bridge design enables up to four times faster acquisition of the required temperature-frequency response. Secondly, a newly developed AC-based measurement method facilitates direct determination of the volumetric heat capacity cV of liquids which is an essential task in many condition monitoring applications. Thirdly, a novel impulse response approach allows rapid acquisition of cV. Besides the sensor device, we present an analytical model for the basic sensing principle, both measurement methods, and sample measurements performed on selected liquids.
Original languageEnglish
Title of host publicationProceedings IEEE Sensors
EditorsFrancisco J. Arregui
Pages1940-1943
Number of pages4
ISBN (Electronic)9781479901616
DOIs
Publication statusPublished - 12 Dec 2014

Publication series

NameProceedings of IEEE Sensors
NumberDecember
Volume2014-December
ISSN (Print)1930-0395
ISSN (Electronic)2168-9229

Fields of science

  • 202019 High frequency engineering
  • 202021 Industrial electronics
  • 202036 Sensor systems
  • 203017 Micromechanics
  • 202 Electrical Engineering, Electronics, Information Engineering
  • 202027 Mechatronics
  • 202028 Microelectronics
  • 202037 Signal processing

JKU Focus areas

  • Mechatronics and Information Processing

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