Thermodynamic investigation of applying a thermoelectric generator to produce hydrogen in a multi-generation system

In the near future, hydrogen is expected to become a significant fuel, greatly contributing to atmospheric air quality. so far, fossil fuels have dominated global hydrogen production. pure hydrogen can be produced by electrolysis of water; however, it is an energy-demanding process. in this study, a novel multigeneration system is introduced using nanofluid in a solar system. the proposed system includes a quadruple effect absorption refrigeration cycle, a thermoelectric generator, a pem electrolyzer, a vapor generator, and a domestic water heater. a parametric study was done to consider the effect of significant parameters on the system’s efficiency. it was observed that the system generated 18.89 kw of power, and the collector energy and exergy efficiency were 82.21% and 80.48%, respectively. furthermore, the results showed that the highest exergy destruction rate occurred in the solar system at the rate of 4461 kw. the energy and exergy cops of the absorption chiller were discovered to be 1.527 and 0.936, respectively. the hydrogen production rate decreases by increasing the volume concentration of the nanoparticles, the solar radiation, and the figure of merit index.