Thermodynamic analysis of absorption refrigeration systems with nanofluid for using in sport buildings

Abstract

In the present study, a novel refrigeration cycle that works based on the absorption refrigeration cycle and uses solar energy to supply energy to sports buildings is presented. For collecting the solar energy, a parabolic trough collector is used, and for enhancement of the heat transfer to the working fluid, synthesis-based nanofluid containing SiO2 nanoparticles are used. The investigation of the fluid flow inside the absorber tube shows that the convection heat transfer coefficient is increased as a result of increasing the volume fraction of the nanoparticles in the nanofluid. In addition, using the nanofluid in the heat exchanger inside the generator increases the heat transfer to the solution inside the generator and the coefficient of performance of the absorption cycle. The benefits of this research are the analytical investigation of the new combined absorption–ejection refrigeration cycle, which can provide a good understanding of the effect of different parameters on the system performance, and the investigation of using nanofluid in the absorber tube of a trough parabolic collector in solar systems.