Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
AN EXPERIMENTAL STUDY OF DIAMOND NANOLUBRICANT IN COMMERCIAL REFRIGERATION SYSTEM
Submission Author:
David Fernando Marcucci Pico , SP , Brazil
Co-Authors:
David Fernando Marcucci Pico, Ítalo Guilherme, ENIO PEDONE BANDARRA FILHO
Presenter: David Fernando Marcucci Pico
doi://10.26678/ABCM.COBEM2019.COB2019-2428
Abstract
This work conducted an experimental study on nanolubricant based on synthetic lubricant polyol ester (POE) and diamond nanoparticles in a refrigeration system. The thermo-physical properties of the pure lubricant and the nanolubricants were evaluated. Moreover, an experimental refrigeration bench was developed in order to evaluate the refrigeration capacity, the power consumption by the compressor, the coefficient of performance (COP), the discharge temperature of the compressor and, finally, the performance of the nanolubricants at the mass fractions of 0.0%, 0.1% and 0.5% of diamond nanoparticles. Tests were performed with HFC-410A and HFC-32 refrigerants maintaining the condensation temperature at 41 °C, ranging from -7 to 7 °C the evaporation temperature and varying the operating frequency of the compressor from 45 to 60 Hz. According to the results of R-410A, it was possible to conclude that, with the use of nanolubricant, there was an increase in both the refrigeration capacity and the coefficient of performance. The discharge temperature of the compressor decreased. In relation to R-32, the use of nanolubricants under the evaluated conditions show slightly improvements in the refrigeration system in terms of cooling capacity and discharge temperature.
Keywords
COP, Nanolubricant, Nanoparticle, HFC-32, HFC-410A
