Energy and exergy analyses of an integrated biomass gasification combined cycle employing solid oxide fuel cell and organic Rankine cycle

Roy, Dibyendu; Ghosh, Sudip

doi:10.1007/s10098-017-1358-5

Cited by 29 publications

(13 citation statements)

References 39 publications

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“…( 7). (7) where μ is fuel utilization factor, φH2 is molar flow of hydrogen fed into SOFC, N is the number of single cell, Ac is the area of single cell.…”

Section:  Reformer Sofc Subsystemmentioning

confidence: 99%

“…However, it should be noted that the off gas from the SOFC still has a certain amount of heat and chemical energy that can be utilized to further improve the energy conversion efficiency of hybrid system. In fact, there have been some literatures investigated the topic on how to recycle the energy of SOFC off-gas by gas turbine or external engine efficiently [7,8]. Compared with gas turbine (GT), the internal combustion (IC) engine generally has a smaller power capacity, which is more comparable to the SOFC power capacity.…”

Section: Introductionmentioning

confidence: 99%

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Biomass fueled SOFC-Engine combined heat and power system: energy, exergy and thermo-economic evaluations

Pengfei¹,

Zhu²,

Yao³

et al. 2021

Preprint

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A novel hybrid system using biomass as fuel for both power and heat generation, which consists of biomass gasification unit, solid oxide fuel cell, homogeneous charge compression ignition engine and waste heat recovery subsystems, is proposed in this work. Based on the thermodynamic modeling, the system is comprehensively evaluated by energy, exergy and thermo-economic analyses. The results show that the proposed hybrid system has an energy conversion efficiency of approximately 68% and the exergy efficiency of 51%, both of which are comparable to other biomass fueled hybrid fuel cell systems reported in literature. The exergy destruction of the gasifier is the largest, whose relative exergy destruction is up to 21.5%. The fuel cell component contributes to 71% of the total power but with small relative exergy destruction. Besides, the specific electric energy cost of the proposed hybrid system is calculated to be 0.054 $/kWh. The payback period and annual return on investment can reach 2.4 year and about 9.83%. These results reveal that the proposed conversion technology of biomass to power is efficient and economical, which could be a promising way for biomass utilization.

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“…( 7). (7) where μ is fuel utilization factor, φH2 is molar flow of hydrogen fed into SOFC, N is the number of single cell, Ac is the area of single cell.…”

Section:  Reformer Sofc Subsystemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biomass fueled SOFC-Engine combined heat and power system: energy, exergy and thermo-economic evaluations

Pengfei¹,

Zhu²,

Yao³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Furthermore, Bellos and Tzivanidis [4] examined a trigeneration system including a generator, an ejector, a condenser, a turbine, and an evaporator where the studied configuration forms a system able to produce heating, cooling, and electricity. The heat source generally comes from geothermal energy [5][6][7][8], biomass energy [9,10], or industrial waste streams [11,12], otherwise solar energy [13,14].…”

Section: Introductionmentioning

confidence: 99%

Energy and exergy analysis of a combined system: cascade organic Rankine cycle and cascade refrigeration cycle

Touaibi

Köten

Fadhila

et al. 2021

Journal of Thermal Engineering

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In this paper, a new combined system is proposed for recovering thermal energy at medium temperature using a cascade organic Rankine cycle to feed a cascade refrigeration cycle. Energy and exergy analysis is applied to the combined system to determine its performance using different working fluids under the same operating conditions taking into account the effect of some operating parameters and the selection of organic fluids on cycle performance. The pair of organic fluid (Toluene/R245fa) used for the cascade organic Rankine cycle and the pairs (R717/R744, R717/R23, R134a/R23) used for the cascade refrigeration cycles. The results show that the combined system function with the couple (R717/R23) for cascade refrigeration cycle gives better exergy efficiency 50.03% compared to other couples, 49.57% for the couple (R717/R744), and 48.01% for the couple (R134a/R23). The thermodynamic evaluation shows that the operating temperatures, such as the cascade organic Rankine cycle evaporation temperature and the cascade refrigeration cycle evaporation temperature influence the performance of the combined system.

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“…Meratizaman et al [11] performed 'techno-economic' analysis of a methane-driven SOFC-GT-based power generation system for household application and found that the proposed system is economical for the hot and wet climatic zone. Roy and Ghosh [12] performed energetic and exergetic analyses of a biomass gasification-based combined power generation system integrating SOFC-GT and organic Rankine cycle (ORC). It was found that overall efficiency varies in between 30 and 40%.…”

Section: Introductionmentioning

confidence: 99%

Energetic, exergetic and economic (3E) investigation of biomass gasification-based power generation system employing molten carbonate fuel cell (MCFC), indirectly heated air turbine and an organic Rankine cycle

Roy

Samanta

Ghosh

2019

J Braz. Soc. Mech. Sci. Eng.

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In this paper, a biomass gasification-based molten carbonate fuel cell (MCFC)-integrated advanced power system has been modelled and analyzed. The proposed system consisted of a biomass gasifier with hot gas cleaning equipment, a MCFC module, an indirectly heated air turbine and an organic Rankine cycle. Energetic, exergetic and economic (3E) analyses of the proposed power generation have been carried out. The effects of variation of operating and design parameters on the overall performances of the system have been showcased. Base case energetic and exergetic efficiency is found to be 38.49% and 32.7%, respectively. Exergetic analysis discloses that the highest exergy destruction takes place at gasifier (34.15%) followed by primary heat exchanger (16.15%), after burner (14.88%) and MCFC (13.80%). The proposed power system exhibits minimum unit cost of electricity of 0.17 $/kWh at current density of MCFC of 950 A/m 2 , fuel cell temperature of 973 K and secondary air blower pressure ratio of 1.6. At this operating condition, the plant gives a net output of 105.3 kW, its energy efficiency is 40.37% and exergy efficiency is 34.38%.

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Energy and exergy analyses of an integrated biomass gasification combined cycle employing solid oxide fuel cell and organic Rankine cycle

Cited by 29 publications

References 39 publications

Biomass fueled SOFC-Engine combined heat and power system: energy, exergy and thermo-economic evaluations

Biomass fueled SOFC-Engine combined heat and power system: energy, exergy and thermo-economic evaluations

Energy and exergy analysis of a combined system: cascade organic Rankine cycle and cascade refrigeration cycle

Energetic, exergetic and economic (3E) investigation of biomass gasification-based power generation system employing molten carbonate fuel cell (MCFC), indirectly heated air turbine and an organic Rankine cycle

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