Modeling and simulation of an integrated gasification SOFC–CHAT cycle to improve power and efficiency

Abstract

Cascaded humidification advanced turbine (CHAT) cycles are used for the enhancement of output power in conventional gas turbines. In this study, an IG–SOFC–CHAT combined cycle has been presented. The proposed cycle has been used as a novel approach for alleviating the restrictions on generated power in the SOFC–GT hybrid systems. Additionally, a significant amount of heat can be produced in this hybrid cycle, which justifies its application as a CHP system. Modeling and simulation of the cycle have been performed from the energy point of view. To generate syngas fuel from coal, an FICFB gasifier system, integrated with a low temperature gas cleaning system, has been used. Results show that compared to the conventional gas turbines, electrical power generation from the proposed IG–SOFC–CHAT cycle has been increased by about 45%, while the total energy efficiency of the comprehensive cycle is still within the acceptable range of CHP cycles. Moreover, results indicate that the output power from the proposed cycle is stable against ambient temperature variations. In addition, wastage of heat in the proposed cycle was minimized by transferring waste heat to heat sinks, which resulted in the balance of energy in the cycle. Overall results show the suitability of the proposed cycle to attain high power generation capacity in SOFC–GT hybrid systems. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 610–618, 2017

Electrochemical Modeling and Techno -Economic Analysis of Solid Oxide Fuel Cell for Residential Applications

“…The results also clarified that in order to avoid concurrent energy generation from conventional sources the recovery of the thermal energy generated by the SOFC is significantly useful [10]. Besides, [11][12][13] have investigated other applications of SOFC CHP systems in both commercial and residential buildings, as well as employment hybrid concept with Gas Turbine (GT) and Gasifier. Although, the SOFC systems are usually supplied by natural gas, which is converted by means of an internal reformer.…”

“…This will dramatically reduce the system capital cost since any external fuel processing will be no longer required [12], Employing SOFC and gas turbine (GT), the gaseous fuel can be turned into heat and power. However, the combination of SOFC and GT has yielded higher performance [13,14]. Ghadamian, et al [15], proposed a novel hybrid pressurized SOFC/ GT power generation system, fed by biomass to serve in a small-scale industrial application.…”

Integration of solar dryer with a hybrid system of gasifier‐solid oxide fuel cell/micro gas turbine: Energy, economy, and environmental analysis

“…Also, solid oxide fuel cell (SOFC) is one of the most promising technologies for power production in the future due to its high efficiency compared to rival technologies and its environmentally friendly energy production aspect 4 . For decades, one of the most popular ideas in energy systems integration in the literature was the idea of SOFC and gas turbine (GT) integration since this integration can provide higher efficiency 4‐6 . Several researches have studied biomass integration with SOFC‐GT systems, 5,7,8 and a variety of novel biomass gasification systems, integrated with SOFC systems, have been reviewed and discussed by literature 9‐13 .…”

“…4 For decades, one of the most popular ideas in energy systems integration in the literature was the idea of SOFC and gas turbine (GT) integration since this integration can provide higher efficiency. [4][5][6] Several researches have studied biomass integration with SOFC-GT systems, 5,7,8 and a variety of novel biomass gasification systems, integrated with SOFC systems, have been reviewed and discussed by literature. [9][10][11][12][13] The integration of SOFC-GT with a gasifier is modeled numerically 14 to determine the effect of gas compositions such as H 2 , CH 4 , and CO on the overall system's performance.…”

Propose and analysis of an integrated biomass gasification‐CHAT‐ST cycle as an efficient green power plant

“…Due to the mentioned description, humidified cycles make a remarkable decrease in specific investment costs. Some of the benefits of GT systems using air–water mixture are higher electrical efficiency and performance, higher delivered power, better flow rate management, appropriate feasibility in CHP, cogeneration, and district heating applications .…”