Abstract
The current study proposes a novel hybrid system consisting of the high-temperature proton exchange membrane fuel cell (HTPEMFC) and spray flash desalination (SFD) system to harvest the waste heat from HTPEMFC. The output power density and energy efficiency are analyzed to evaluate the system performance. Comparing the hybrid system with the stand-alone HTPEMFC system reveals that the maximum power density and energy efficiency of the proposed system are 69% and 40% higher than those of the stand-alone HTPEMFC system. Moreover, many parametric studies are conducted to determine how the performance of the hybrid system depends on its design and operating conditions. The cell working temperature exhibits contrary effects on the HTPEMFC and SFD system. The doping level should be less than 30 considering the stability of the membrane and the improvement of thermodynamic performance. A lower flow rate of feed water or a higher flow rate of cooling water is conducive to the proposed system. Finally, the multi-objective optimization is performed based on the genetic algorithm.
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