Abstract

ESCALONA RODRIGUEZ, Fabián; CARVAJAL MARISCAL, Ignacio; SANCHEZ SILVA, Florencio  and  POLUPAN, Georgiy. Influencia del Flujo De Enfriamiento en el Comportamiento Térmico de un Termosifón de Contorno. Ingenier. mecáni. tecnolog. desarroll [online]. 2016, vol.5, n.4, pp.405-414. ISSN 1665-7381.

Loop thermosyphons are devices that can be applied in heat recovery in industrial processes, contributing to increase their energy efficiency. For this purpose the thermal behavior of a loop thermosyphon was studied by varying the cooling flow in the condensing zone. Heat transport capability and thermal performance of the device for different cooling flows and filling ratios were analyzed. For this research an experimental installation and a loop thermosyphon that uses distilled water as the working fluid were built. Two filling ratios, 15% and 30%, of the thermosyphon internal volume were chosen. Heat rates of 157 W, 304 W and 442 W were supplied, and the cooling flows were 0.017 kg/s (1 lpm), 0.026 kg/s (1.5 lpm) and 0.033 kg/s (2 lpm) for each heat rate and therefore for each filling ratio. It was found that the maximum thermal efficiency of the loop thermosyphon was 84.6%, however, when the maximum heat transport is achieved thermal efficiency had lower values but always greater than 75%. It was also observed that the more increases the cooling flow the more independent is the thermosyphon from filling ratio, since the cooling flow is capable of absorbing all the heat carried by the steam to the condenser. Finally, as expected, the higher heat transport capability was recorded for loop thermosyphon larger filling ratio of 30% of its internal volume.

Keywords : Loop thermosyphon; filling ratio; cooling flow; heat transport capability; thermal performance.

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