Design and thermodynamic analysis of a novel methanol, hydrogen, and power trigeneration system based on renewable energy and flue gas carbon dioxide

In this paper, a new trigeneration system is proposed to decrease atmospheric carbon dioxide emission and produce methanol, hydrogen, power. The composed of an organic Rankine cycle, direct methanol fuel cell, capture unit, proton exchange membrane electrolyzer, synthesis unit. A flue gas stream with defined composition, solar energy, the air are system's inlets. design step, special attention paid heat mass integration between different components so that its waste can be lowered as much possible. Then, balance law, energy conservation principle, exergy relations, auxiliary equations applied for each subsystem investigate thermodynamic performance. Also, effect changing operating parameters on performance studied. obtained results show has efficiencies 66.84% 55.10%, respectively. Furthermore, 94% total destruction rate belongs water while contribution cycle negligible. reactor depends strongly inlet temperature. Maximum equilibrium concentration conversion achieved at temperature 210 °C. parametric studies reveal there optimum cell current density in which produced power maximized.