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First Thermal and Fluids Engineering Summer Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

THERMAL PERFORMANCE COMPARISON BETWEEN WATER-COPPER AND WATER-STAINLESS STEEL HEAT PIPES DESIGNED FOR INDUSTRIAL APPLICATION

DOI: 10.1615/TFESC1.hte.012836
pages 1483-1486

Débora de O. Silva
Space Mechanics and Control Division – DMC National Institute for Space Research, Sao Jose dos Campos, 12227-010 SP Brazil

Eliel Marcelino
INPE - National Institute for Space Research

Roger R. Riehl
Space Mechanics and Control Division – DMC National Institute for Space Research, Sao Jose dos Campos, 12227-010 SP Brazil


KEY WORDS: heat pipe, heat transfer, two-phase flow

Abstract

Heat pipes are a closed tube or chamber of different shapes whose inner surfaces are lined with a porous capillary wick. The wick is saturated with the liquid phase of a working fluid and the remaining volume of the tube contains the vapor phase, able to transport large quantities of heat with little temperature difference between the evaporation and condensation sections, presenting a highly efficient heat transfer process. Heat pipes have become highly reliable systems and since 1970 and this technology has been widely applied in various areas, such as heat exchangers, spacecraft thermal control and cooling systems for electronic components. This technology has found increasing application in improving the thermal performance of heat exchangers in many industrial environments. The use of heat pipes in heat exchangers allows the development of more compact and efficient equipments, when compared to traditional heat exchangers. For some applications, such as heat recovery in industrial process, the use of heat pipes on heat exchangers presents to be rather interesting due to its direct influence on increasing the efficiency, allowing a more compact design. In this scenario, this paper aims to present experimental results of heat pipes operation designed and manufactured in stainless steel and copper using water as working fluid, operating at temperatures up to 200 °C for industrial applications. Even though water-copper heat pipes present a better thermal performance when compared to the water-stainless steel heat pipes, there is a wide application not only for industry but also for aerospace.

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