Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
THERMAL PERFORMANCE OF A FLAT PLATE PULSATING HEAT PIPE WITH ULTRA-SHARP LATERAL GROOVES
Submission Author:
Larissa Krambeck , SC
Co-Authors:
Larissa Krambeck, Kelvin Guessi Domiciano, Luis Alonso Betancur Arboleda, Marcia Mantelli
Presenter: Larissa Krambeck
doi://10.26678/ABCM.COBEM2021.COB2021-1229
Abstract
The thermal performance study of a new geometry ultra-sharp lateral grooved flat plate pulsating heat pipe is performed in high heat load operating conditions. This novel geometry consists of a round cross-section with ultra-sharp lateral grooves, located at the evaporator. The thermal performance is compared to ordinary flat PHP, with round cross-section channels. Diffusion bonding technology is used to manufacture the pulsating heat pipes, made of copper. The working fluid used is distilled water with a filling ratio of 60%. The pulsating heat pipes are tested at three positions: gravity-assisted, horizontal, and against-gravity, under heat loads varying from 600 to 2000 W, a value higher than the PHP's working conditions described in the literature. For large heat loads, both PHPs (round and round with ultra-sharp grooves) work successfully, able to transfer up to 2000 W. The gravity influence is negligible for power inputs beyond 1200 W for any orientation. The main difference in the thermal behavior of the grooved, when compared to the round PHPs, is related to the maximum evaporator temperature, which is reduced by almost 5°C. Also, the experimental results show that the lateral grooves improve the thermal performance of the pulsating heat pipe, reducing the thermal resistance.
Keywords
Pulsating Heat Pipes, lateral grooves, Thermal performance, experimental
