Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
NUMERICAL INVESTIGATION OF THE DIFFUSION ABSORPTION CYCLE TO PRODUCE COLD USING SOLAR ENERGY AS SOURCE
Submission Author:
Julio Cesar Gontijo , MG
Co-Authors:
Julio Cesar Gontijo
Presenter: Julio Cesar Gontijo
doi://10.26678/ABCM.ENCIT2018.CIT18-0544
Abstract
This study aims to present a numerical investigation of the cold production by a diffusion absorption cycle, using NH3-H2O as the working fluids and H2 as pressure equalizer, aiming cold production using solar energy as the source. A complex thermodynamic analysis was done in order to calculate the mass flow, rate heats. To assure the analysis was elaborate obeying all the thermodynamic laws, entropy, enthalpy, and exergy was also calculated. So to conclude the thermodynamic analysis was calculated the inlet, outlet, irreversibilities and the efficiency of all the components in the system. After the first analysis, some parameters were varied in order to achieve the maximum coefficient of performance and the highest refrigeration rate. The parameters include the poor partial pressure, the system pressure, and the evaporator temperature. So it was found the best work cycle condition, and then this state was analyzed in order to see the impact of the evaporator temperature variation. So it was possible to detect some important values and inputted data to get the project solved. The software Engineering Equation Solver was used, which showed the most significant values for this project, the input heat QGEN = 692 W and the output heat QEV = 227 W, and also the system coefficient of performance, COP = 0,33. In that way, it has been validated all the efforts in the simulation development, and it was evident the necessity of more research in the field of exploration of diffusion absorption refrigeration.
Keywords
Absorption, Diffusion, Solar, Hydrogen, Ammonia
