Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
A cascade R134a/R744 refrigeration cycle thermal analysis: evaluation of the intermediate heat-exchanger parameters.
Submission Author:
Cirilo Seppi Bresolin , RS
Co-Authors:
Cirilo Seppi Bresolin
Presenter: Cirilo Seppi Bresolin
doi://10.26678/ABCM.COBEM2017.COB17-1307
Abstract
This work analyses a cascade refrigeration cycle with R134a and R744 as working fluids, evaluating the parameters of the intermediate heat exchanger (IHX). The IHX couples the upper and bottom cycles, and its energy level has an impact on the cycle performance. Parameters such as temperature, pinch point and pressure should be right tuned for the best cycle performance. A thermal simulation is carried out in the refrigeration cycle, as well as a sensitivity analysis of the IHX over the cycle performance. The results show that the cycle performance has a maximum for each temperature and pinch point pair, and this maximum decreases with lower temperature levels in the IHX.
Keywords
Carbon Dioxide Refrigeration Cycle, Thermal modelling, Cycle Performance
