a) High temperature thermosyphons
The manufacture of high temperature thermosyphons (>400°C) has been researched around the globe.
Such thermosyphons must be built in refractory metals, in order to withstand high temperatures,
such as Tungsten, Molybdenum, Tantalus, and a few types of steel. Also, the use of liquid metals
such as Sodium, Lithium, Potassium, and Mercury as working fluids, is necessary. Therefore, an
important aspect of its project and construction is the compatibility between the tube wall material
and the working fluid.
Currently LABTUCAL has been developing research on Mercury and Sodium working fluids on
heat exchanging thermosyphons.
Figure 1 - Experimental study on a Sodium thermosyphon
Figure 2 - Illustration of a liquid metal thermosyphon tested in China
Publications
CUNHA, A. F. V.; MANTELLI, M. B. H.; NUERNBERG, G. G. V.; REIS, F. Experimental Study of Mercury Thermosyphons. Congress of Mechanical Engineering - COBEM 2007, 2007, Brasília. Proceedings of COBEM 2007.
MANTELLI, M. B. H.; BORGES, T. P. F.; KNIESS, C.; CUNHA, A. F. V.; NUERNBERG G. V. Tecnologia de Termossifões Aplicada a Trocadores de Calor de Alta Temparatura. In: 1º Seminário da Rede Gás & Energia, 2006, Rio de Janeiro. Tecnologia de Termossifões Aplicada a Trocadores de Calor de Alta Temparatura, 2006.
CUNHA, A. F. V.; MANTELLI, M. B. H. Modeling of High Temperature Thermosyphons. In: 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, San Francisco, California, June 5-8, 2006.
CUNHA, A. F. V.; MANTELLI, M. B. H. Analysis of a High Temperature Thermosyphon. In: Congresso Brasileiro de Engenharia e Ciência dos Materiais, 2005, Ouro Preto, 2005.
