Publication detail

The Influence of the Phase Change Temperature Range and the Phase Change Hysteresis of a PCM on the Performance of an Air-PCM Heat Storage Unit

CHARVÁT, P. ZÁLEŠÁK, M. KLIMEŠ, L.

Original Title

The Influence of the Phase Change Temperature Range and the Phase Change Hysteresis of a PCM on the Performance of an Air-PCM Heat Storage Unit

Type

conference paper

Language

English

Original Abstract

The influence of the phase change temperature range and the hysteresis of the enthalpy-temperature relationship h(T) of PCMs on the performance of thermal energy storage (TES) systems is rarely quantified. In the present study, the quantification is done by the comparison of the amounts of heat stored in (and discharged from) the air-PCM heat exchanger (TES unit) operating between constant air temperatures. All simulations were conducted for the same mean phase change temperature of the PCM (30 °C). The inlet air temperature of the air-PCM HEX was 40 °C during the heat charging period and 20 °C during the heat discharge period. The maximum considered phase change temperature range of the PCM was 10 °C. The maximum phase transition hysteresis, in the study defined as the temperature difference between the melting and solidification peaks, was 4 °C. The results indicate that in case of the PCMs with a wide phase change temperature range and a significant hysteresis of the h(T) curves, the influence of these properties cannot be neglected in the simulation studies in order to achieve accurate results.

Keywords

phase change materials, enthalpy-temperature relationship, phase transition hysteresis

Authors

CHARVÁT, P.; ZÁLEŠÁK, M.; KLIMEŠ, L.

Released

8. 11. 2019

Publisher

ASME

Location

Salt Lake City, Utah, USA

ISBN

978-0-7918-5943-8

Book

ASME 2019 International Mechanical Engineering Congress and Exposition

Pages from

1

Pages to

6

Pages count

6

URL

https://asmedigitalcollection.asme.org/IMECE/proceedings-abstract/IMECE2019/59438/V006T06A084/1073176

BibTex

@inproceedings{BUT162085,
  author="Pavel {Charvát} and Martin {Zálešák} and Lubomír {Klimeš}",
  title="The Influence of the Phase Change Temperature Range and the Phase Change Hysteresis of a PCM on the Performance of an Air-PCM Heat Storage Unit",
  booktitle="ASME 2019 International Mechanical Engineering Congress and Exposition",
  year="2019",
  pages="1--6",
  publisher="ASME",
  address="Salt Lake City, Utah, USA",
  doi="10.1115/IMECE2019-10438",
  isbn="978-0-7918-5943-8",
  url="https://asmedigitalcollection.asme.org/IMECE/proceedings-abstract/IMECE2019/59438/V006T06A084/1073176"
}