Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
CHARACTERISTICS OF THE USE OF CO2 IN CASCADE REFRIGERATION SYSTEMS AND FOR POWER GENERATION IN BRAYTON CYCLES
Submission Author:
Adonis Menezes , SC
Co-Authors:
Adonis Menezes, Vitor Liston, Amanda Aliano, Rafael Boschini Albuquerque Passarella, Júlio Passos
Presenter: Rafael Boschini Albuquerque Passarella
doi://10.26678/ABCM.ENCIT2018.CIT18-0563
Abstract
CO2(R744) is used on refrigeration systems since the end of the 19th century, but after the introduction of chlorofluorocarbons, it lost space. With the protocol of the Montreal, it got the scientific community’s attention once again, due to low Ozone Depletion Potential (ODP) and Global Warming Potential (GWP). The following work presents the possibilities of the utilization of CO2(R744) in low-pressure cascade refrigeration systems and energy generation on Brayton cycles. However, the use of CO2 for these applications requires the knowledge of the heat transfer coefficient, pressure drop and saturation temperature among others. This is demanding great efforts from the scientific community on controlled flow studies. This analysis presents mathematical correlations involving CO2, which presented low mean deviations if compared to the experimental data. With more robust results, there is rising trend toward the use of CO2 in commercial thermodynamic systems.
Keywords
CO2, R744, CASCADE REFRIGERATION, Brayton Cycle
