Numerical Simulation of Heat Transport Characteristics of CFRP embedded Oscillating Heat Pipes for Space Applications



Journal Title

Journal ISSN

Volume Title


50th International Conference on Environmental Systems


An oscillating heat pipe (OHP) has attracted attention because it is lightweight and thin and does not require additional power to operate. Therefore, it is expected to be applied to spacecraft as a new heat transfer device, and we are aiming to develop a satellite structure panel in which OHP is embedded in CFRP. There are many previous studies on the thermal transport performance of OHP, but most of those have dealt with the OHP, which is made of metal. On the other hand, CFRP is lightweight and has high thermal conductivity, but has anisotropy in thermal conductivity. The thermal conductivity of CFRP is high in the carbon fiber direction whereas it is low in the perpendicular to the fibers. Therefore, it is assumed that the performance of OHP will change significantly depending on the anisotropy of thermal conductivity. Thus, it is necessary to predict the heat transport performance of OHP using CFRP. In this study, we constructed a numerical model of OHP, considering the anisotropy of the thermal conductivity of CFRP. The flow paths were made of stainless steel, and the spaces between the flow paths are filled with CFRP. Using this numerical model, we investigated the heat transport performance by varying heat input, number of turns, and carbon fiber orientation. In the paper, we show the effects of CFRP orientation on the thermal performance of OHP based on the results of numerical simulation.


Kosei Matsubara, Tohoku university
Kohei Sone, Tohoku University
Koji Fujita, Tohoku university
Hiroki Nagai, Tohoku university
ICES201: Two-Phase Thermal Control Technology
The 50th International Conference on Environmental Systems was held virtually on 12 July 2021 through 14 July 2021.


Oscillating heat pipe, Two-Phase Flows, Anisotropy of thermal conductivity of CFRP