Accelerated Life Testing of a Fin-integrated PCM Device by Additive Manufacturing

Date

2024-07-21

Journal Title

Journal ISSN

Volume Title

Publisher

2024 International Conference on Environmnetal Systems

Abstract

A fin-integrated phase change material (PCM) device fabricated by additive manufacturing (AM) can achieve a high mass efficiency thanks to the fin-integrated container structure. There little literatures on the lifetime of PCMs and the material compatibility between the PCMs and the container material (AlSi10Mg). In this paper, the tolerance of the PCM device to freeze-thaw cycle (up to 20,000 cycles), high-temperature (up to 130 °C), and gamma-irradiation (up to 56.7 kGy) have been evaluated. As candidate PCMs, lithium-nitrate-trihydrate (LiNO3 · 3H2O)-based PCM and two n-paraffins (octadecane and tetracosane) were chosen. The thermal properties (i.e., heat storage capacity, melting/solidification point) were evaluated via a slow thermal cycle test in a thermostatic chamber. The internal gas pressure was measured with a pressure gauge, whereas its gas composition was evaluated via gas chromatography and mass spectrometry. It was confirmed that the thermal properties are almost insensitive to those environments, whereas only the solidification point of LiNO3 · 3H2O-based PCM becomes unstable. It was also confirmed that a significant amount of hydrogen gas is generated in the device, mainly due to the high temperatures for LiNO3 · 3H2O-based PCM and gamma-irradiation for n-paraffins.

Description

Ryuta Hatakenaka, Japan Aerospace Exploration Agency (JAXA), Japan
Masanori Saitoh, Orbital Engineering Inc., Japan
Takafumi Yamamoto, Toyama Industrial Technology Research and Development Center, Japan
ICES104: Advances in Thermal Control Technology
The 53rd International Conference on Environmental Systems was held in Louisville, Kentucky, USA, on 21 July 2024 through 25 July 2024.

Keywords

heat storage, phase change material(PCM), additive manufacturing

Citation