Detail publikace

Concurrent determination of heat and capacity change of a sessile droplet using a single measurement

ZHU, H. LU, H. ZHANG, Y. XU, H. BRODSKÝ, J. GABLECH, I. FENG, J. YAN, Q. NEUŽIL, P.

Originální název

Concurrent determination of heat and capacity change of a sessile droplet using a single measurement

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Microcalorimetry, designed for the independent measurement of enthalpy and heat capacity, has been commercially available for a considerable time. However, heat-related states in samples, especially liquids, can introduce complicated phenomena and challenging measurement and data evaluation processes. Such complexity becomes apparent when observing fluctuations in heat capacity (Cp) while measuring heat consumption (Q) during water evaporation. This paper presents a continuous heat pulse measurement (CHPM) method for concurrently analyzing Q and Cp in a single test using microcalorimetry. The sample droplet of 400 nL was directly dispensed on the microcalorimeter surface, followed by a light-emitting diode (LED) radiation generating heat to perform CHPM. We repetitively heated the microcalorimeter using heat pulses provided by LED irradiation, with their duration set to 100 ms and 10 s repetition, while measuring the temperature response of the microcalorimeter. A MATLAB-based simulation model was established to validate the accuracy of our Cp measurements, which show its value of 0.79 % of minimum variance. Water evaporation coupled with simultaneous salt crystallization served as our study model, where the Cp values were calculated from real-time responses to heat pulses provided by LED. The experimental outcomes confirm the suitability of CHPM in extracting key thermal properties and emphasize its versatility as a diagnostic tool, providing a significant method for research and applications in the fields of physics, engineering, and beyond.

Klíčová slova

Microcalorimetry; Heat; Capacity change determination; Continuous heat pulse measurement (CHPM); Water evaporation; Crystallization energy

Autoři

ZHU, H.; LU, H.; ZHANG, Y.; XU, H.; BRODSKÝ, J.; GABLECH, I.; FENG, J.; YAN, Q.; NEUŽIL, P.

Vydáno

16. 12. 2024

Nakladatel

ELSEVIER SCIENCE SA

Místo

LAUSANNE, SWITZERLAND

ISSN

1873-3069

Periodikum

SENSORS AND ACTUATORS A-PHYSICAL

Ročník

380

Číslo

12

Stát

Švýcarská konfederace

Strany od

1

Strany do

8

Strany počet

8

URL

https://www.sciencedirect.com/science/article/pii/S0924424724010367

BibTex

@article{BUT193658,
  author="ZHU, H. and LU, H. and ZHANG, Y. and XU, H. and BRODSKÝ, J. and GABLECH, I. and FENG, J. and YAN, Q. and NEUŽIL, P.",
  title="Concurrent determination of heat and capacity change of a sessile droplet using a single measurement",
  journal="SENSORS AND ACTUATORS A-PHYSICAL",
  year="2024",
  volume="380",
  number="12",
  pages="8",
  doi="10.1016/j.sna.2024.116042",
  issn="1873-3069",
  url="https://www.sciencedirect.com/science/article/pii/S0924424724010367"
}