Design and Simulation of a Nanofluid-based Solar Absorption-ejection Refrigeration System

In the present study, a novel refrigeration cycle which works on base the absorption refrigeration cycle and uses solar energy for supply energy in the generator, is investigated via computer simulation. For collecting the solar energy, a trough parabolic collector is used, and for enhancement the heat transfer to working fluid, the synthesis-baed nanofluid containing Al2O3 nanoparticles is used. The investigation of the fluid flow inside absorber tube shows that the convection heat transfer coefficient is increased as a result of increasing the volume fraction of the nanoparticles in nanofluid. Also, using the nanofluid in the heat exchanger inside the generator increases the heat transfer to the solution inside the generator and COP of the absorption cycle. The benefits of this research are, the analytical investigation of the new combined absorption-ejection refrigeration cycle which can gives a good understanding of the effect of different parameters on the system performance and investigation of the using nanofluid in the absorber tube of trough parabolic collector in the solar systems.