Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 53 11 2022 01 21 Energy Analysis and Exergy of the System of Simultaneous Production of Power and Hydrogen with the Excitatory Gasification of Municipal Solid Waste Energy Analysis and Exergy of the System of Simultaneous Production of Power and Hydrogen with the Excitatory Gasification of Municipal Solid Waste 5529 5550 4365 10.22060/mej.2021.19446.7029 FA Amirhamzeh Farajollahi Department of Engineering, Imam Ali University, Tehran, Iran Amirhossein Hejazi Babol Noshirvani University of Technology Heshmat Gazori Imam Ali university Mohsen Rostami ]ئشئ َمه دهرثقسهفغuniversity,Tehran,Iran Journal Article 2021 01 02 Nowadays, due to the extensive application of renewable-based cogeneration systems and also the economic and environmental necessities, their design and thermodynamic analysis have been conducted by many scientists. In this way, a novel, simple, and practical combined power and hydrogen cogeneration unit have been designed in the present study in which there are gas turbine, gasifier, transcritical Rankine cycle, and proton exchange membrane electrolyzer. This system has been analyzed from the first and second laws of thermodynamics by an engineering equation solver. The proposed system is able to generate power and hydrogen simultaneously for users. The power and hydrogen production capacities of the system are 3.92 MW and 608.8 cubic meters per hour, respectively, which consume biomass of about 1.155 kg/s. The energy utilization factor and exergy efficiency of the system is 34.71 % and 29.44 %, respectively. It can be seen that the overall exergy destruction of the system is 11854 kW, in which gasifier, gas turbine, and combustion chamber have the highest irreversibilities. In addition, it can be concluded that the exergy efficiency of condenser and heat exchanger 3 are the lowest ones among other types of equipment. According to the parametric studies, it was found that increasing the inlet temperature of the gas turbine has a positive effect, and increasing the maximum pressure of the transcritical carbon dioxide cycle has a negative effect on the energy utilization factor and the exergy efficiency of the system. Nowadays, due to the extensive application of renewable-based cogeneration systems and also the economic and environmental necessities, their design and thermodynamic analysis have been conducted by many scientists. In this way, a novel, simple, and practical combined power and hydrogen cogeneration unit have been designed in the present study in which there are gas turbine, gasifier, transcritical Rankine cycle, and proton exchange membrane electrolyzer. This system has been analyzed from the first and second laws of thermodynamics by an engineering equation solver. The proposed system is able to generate power and hydrogen simultaneously for users. The power and hydrogen production capacities of the system are 3.92 MW and 608.8 cubic meters per hour, respectively, which consume biomass of about 1.155 kg/s. The energy utilization factor and exergy efficiency of the system is 34.71 % and 29.44 %, respectively. It can be seen that the overall exergy destruction of the system is 11854 kW, in which gasifier, gas turbine, and combustion chamber have the highest irreversibilities. In addition, it can be concluded that the exergy efficiency of condenser and heat exchanger 3 are the lowest ones among other types of equipment. According to the parametric studies, it was found that increasing the inlet temperature of the gas turbine has a positive effect, and increasing the maximum pressure of the transcritical carbon dioxide cycle has a negative effect on the energy utilization factor and the exergy efficiency of the system. https://mej.aut.ac.ir/article_4365_ba2e6cc6d947a52d792cb858ee622e6e.pdf