NUMERICAL AND EXPERIMENTAL INVESTIGATIONS OF THE THERMAL RADIATION SHIELDS FOR

APPLICATIONS IN CRYOGENIC SYSTEMS

M. Anghel^{1, 2*}, M. Curuia¹, A. Badea²

¹National Research and Development Institute for Cryogenics and Isotopic Technologies - ICSI Rm. Valcea, Uzinei Street no. 4,

 P.O. Box Râureni 7, 240050, Râmnicu Vâlcea, Romania; ²University “Politehnica” of Bucharest, Faculty of Power Engineering, Romania

ABSTRACT

 The analytical solutions have an important role in applications of the heat transfer. In this work are presented theoretical and experimental aspects about the heat transport by radiation with applications in cryogenic systems. The objective of this paper is to show the importance of the thermal shields for reducing the influence of the radiation and also is to show the effect of the vacuum pressure on the thermal loading in cryogenic applications. The numerical and experimental investigations are presented for four different thermal shields. These thermal shields were tested on the Sumitomo SRDK Series cryocooler system.

Keywords: thermal shields, cryogenic, radiation transfer.