Moreover, if the goal is to produce more power, the system should operate at high current density. Therefore, the system should operate at low current density if the goal is to generate power at higher efficiency. However, the output power increases due to enhancement of the current density. The study has shown that the system efficiency and voltage reduce continuously as the current density increases due to increase of Ohmic and concentration losses. In this paper, an atmospheric SOFC and GT hybrid system have been simulated by application of Aspen Plus existing functions and unit operation modules. The high operating temperature of the SOFC also provides excellent possibilities for feeding into a gas turbine (GT) to generate additional electricity. One type of fuel cell is the solid oxide fuel cell (SOFC) with the operation temperature of around 1273°K. Fuel cell is an energy conversion device that transforms the chemical energy of a fuel gas directly into electrical energy without direct combustion as an intermediate step.
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