Evaluation of SOFC-CHP’s ability to integrate thermal and electrical energy system decentrally in a single-family house with model predictive controller

Narayanan, Muthalagappan; Mengedoht, Gerhard; Commerell, Walter

doi:10.1016/j.seta.2021.101643

Cited by 3 publications

(1 citation statement)

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“…This has led researchers to investigate new energy conversion techniques, such as clean energy, hydrogen production, and power generation technologies [1][2][3]. Among them, converting the wide range of hydrocarbon/renewable fuels using solid oxide fuel cells (SOFCs) is considered a promising technology due to their high efficiency, capability of using a wide range of fuels [4][5][6][7][8][9][10][11], and efficient integration with heat recovery systems [12][13][14][15][16]. Hydrocarbon fuels can be reformed inside SOFCs, and such systems are called internal reforming SOFCs (IR-SOFCs).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of Three Internal Reforming Protonic Ceramic Fuel Cell-Gas Turbine Hybrid Systems

et al. 2022

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Protonic ceramic fuel cells (PCFCs) offer direct and efficient conversion of hydrocarbon fuels into electricity. In this study, three internal-reforming (IR)-PCFC/gas turbine (GT) hybrid systems are proposed and analyzed to achieve higher system efficiency. High-quality heat from GT in system 1 and system 2 is supplied to anode and cathode preheaters, respectively, whereas in system 3, the heat is simultaneously split into both preheaters. Effects of air flow rate, fuel utilization factor (Uf), and steam to carbon ratio (S/C) are also investigated. It is found that the best system design can be achieved by effectively utilizing GT exhaust heat for both electrode preheaters, as indicated in system 3. The maximum energy system efficiency obtained among the hybrid systems analyzed in this study is 71% with total exergy destruction of 686.7 kW. When fueled by methane, the hybrid system can achieve energy and exergy efficiencies of 71% and 77%, respectively, with 0.85 Uf. On the other hand, propane-fueled systems can achieve energy and exergy efficiencies of 68% and 75%, respectively. As S/C increases from 2 to 7, system efficiency decreases from 71% to 50%. When system 3 is fueled with butane or propane, system efficiency is only 3% lower than that fueled by methane.

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