Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Experimental Analysis of the Precharging Effect on the Dynamic Behavior of a Reed Valve Used in Refrigeration Compressors
Submission Author:
Gabriel Moimás , SP , Brazil
Co-Authors:
André Luís Severino Abrego, José Luiz Gasche, Gabriel Moimás
Presenter: Gabriel Moimás
doi://10.26678/ABCM.COBEM2017.COB17-1713
Abstract
Hermetic reciprocating compressors are widely used in vapor compression refrigeration systems. An important component of this type of compressor is the automatic valve system, which controls the suction and discharge processes. The experimental or analytical/numerical study of this system is complex due to the fluid-structure interaction between the valves and the refrigerant flow, the geometric complexity of the system and also due to the non-linearity caused by the impact between the valve and its seat. A literature review suggests that this theme still deserves attention from the researchers, mainly for those who need accurate experimental data to validate numerical methodologies. Here, we experimentally evaluate the influence of precharging forces ranging from 95 to 360 mN on the dynamics of a large scale valve model used in refrigeration compressors. We measured the amplitude of the valve movement using optical sensor for Reynolds number ranging from 1,500 to 20,000 and calculated its frequency. In general, the effect of the precharging force is larger for lower Reynolds numbers - 1,500 Compressor, fluid-structure interaction, valve dynamics, Refrigeration Keywords
