A Study on Thermal Insulator Effect for Structure Design of Internal Support on Cryogenic Vessel

Kim, Doo-Ho; Ji, Hyun-Jin; Kim, Ki-Youl; Cho, Sung-Baek

doi:2011.14.3.524

J. KIMS Technol > Volume 14(3); 2011 > Article

Journal of the Korea Institute of Military Science and Technology 2011;14(3):524-531.
DOI: https://doi.org/10.9766/KIMST.2011.14.3.524

A Study on Thermal Insulator Effect for Structure Design of Internal Support on Cryogenic Vessel

Doo-Ho Kim, Hyun-Jin Ji, Ki-Youl Kim, Sung-Baek Cho

단열재가 극저온 용기의 내부지지대 구조설계에 미치는 영향

김두호, 지현진, 김기열, 조성백

국방과학연구소

Abstract

The cryogenic vessel, storing a liquified solutions as LOX and LN₂, consists of a external vessel, internal vessel, thermal insulator and internal support. The internal support should be satisfied with mechanical strength not only to support weight of internal tank but also to maintain uniform space between external and internal tank in spite of external mechanical shock. However, excessive structure design of internal supports is able to increase the amount of heat conduction and the rate of vaporization. The thermal insulator, filled with space between a external and internal vessel, reduces the rate of heat transfer and guarantees the standing time of cryogenic vessel. Especially powder type of insulator has low thermal conductivity and reduce the specification of structure design. In order to evaluate the effect of insulator on structure design, the experiment set-up simulated cryogenic vessel was tested in shock environment according to thermal insulator. As a result, the behavior of internal support under external shock was understood and the design criteria was able to be suggested.

Key Words: Thermal Insulation, Shock, Cryogenics Vessel