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Previous study shows the ITM (oxygen ion transfer membrane)‐integrated MCFC (molten carbonate fuel cell) hybrid system with CO2 recovery can maintain high efficiency; however, the oxygen partial pressure on the ITM permeate side is usually 1 atm, which requires a very high pressure ratio of the ITM air compressor in order to separate the oxygen; using the sweep gas can solve this problem. In this...
Based on the benchmark MCFC (molten carbonate fuel cell) hybrid system without CO2 capture, a novel ITM (oxygen ion transfer membrane)-integrated MCFC hybrid system with CO2 capture is proposed, which uses ITM to produce the needed oxygen for the oxy-fuel combustion in the afterburner. With the Aspen plus software, the system model is established and then the system performance is investigated. In...
This paper studies a gas-steam combined cycle system with CO2 capture by integrating the MCFC (molten carbonate fuel cell). With the Aspen plus software, this paper builds the model of the overall MCFC-GT hybrid system with CO2 capture and analyzes the effects of the key parameters on the performances of the overall system. The result shows that compared with the gas-steam combined cycle system without...
In this study, detailed models such as boiler furnace and convective heat exchanger, with the consideration of the requirements of boiler thermodynamic calculation, were developed based on Aspen Plus user model. A boiler system for the thermodynamic calculation of a 600 MW sub-critical boiler was established and results were compared to the reference data. The comparison indicates that the models...
Based on a traditional SOFC hybrid power system, a zero CO2 emission SOFC hybrid power system with steam injection is proposed in this paper and its performance is analyzed. Oxy-fuel combustion can burn the fuel gas from anode thoroughly, and increases the concentration of CO2 gas, which will greatly reduce the energy consumption of CO2 separation. At the same time with the steam injected into the...
The process of co-combustion of municipal solid waste with sludge for power generation was simulated by ASPEN PLUS in this paper. Thermodynamic analysis was carried out according to the simulation results later. The results showed that: Using exhaust gas as heat source to dry the sludge could improve the generation efficiency; The exhaust flue gas of 423 K could decrease the sludge moisture content...
A process model was proposed to predict the combustion of coal in a 300 MW CFB boiler. The effects of coal feed flow rate, the temperature of preheated air and air flow rate on the exhaust gas temperature were analyzed. The result showed that the exhaust gas temperature and boiler efficiency was consistent with data from literature.
Based on the ASPEN PLUS simulation platform, drying and fluidized bed incineration process of mechanically dewatered sludge with 70% moisture content was simulated. Compared with other calculation methods, this method could achieve sludge incineration simulation rapidly, and could further optimize the technology or adjust the stream parameter conveniently. The results obtained showed that: The heat...
Based on Aspen Plus, a computer simulation model for sludge gasification was developed. The influences of moisture content in sludge, gasification pressure and equivalence ratio(ER) were considered. The results showed that, the producer gas were mainly CO, H2, CO2 and H2O with little H2S, CH4, while SO2 and N2 were almost none; with the increase in sludge moisture content, ER should be increased in...
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