Energy, exergy and economic assessments of a novel integrated biomass based multigeneration energy system with hydrogen production and LNG regasification cycle

Taheri, M.; Mosaffa, A.H.; Farshi, L. Garousi

doi:10.1016/j.energy.2017.02.124

Cited by 113 publications

(25 citation statements)

References 43 publications

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“…However, utilizing steam has a high energy penalty; consequently, optimal experimental conditions need to be identified to allow efficient and economical gasification operation. Few papers in the literature have been found to address the energy flows and efficiency of biomass steam gasification for hydrogen production [20][21][22]. Galanti et al [23] reported the equivalence efficiency (sum of net electrical and thermal energy to the thermal power input) related to syngas and hydrogen production along with electric and thermal energy using coal and coal-biomass mixture in Web-based Thermo Economic Modular Program (WTEMP) software.…”

Section: Char Gasification Reaction (Cgr)mentioning

confidence: 99%

Assessment of energy flows and energy efficiencies in integrated catalytic adsorption steam gasification for hydrogen production

et al. 2018

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This study addresses the energy flows and energy efficiency of integrated catalytic adsorption biomass steam gasification for hydrogen production in a pilot scale bubbling fluidized bed system utilizing palm kernel shell as feedstock. The integrated catalytic adsorption utilizes catalyst and CO2 adsorbent together in the single fluidized bed gasifier. Various variables such as effect of temperature (600-750 °C), steam to biomass ratio (1.5-2.5 w/w), adsorbent to biomass ratio (0.5-1.5 w/w), fluidization velocity (0.15-0.26 m/s) and biomass particle size (0.355-0.500 to 1.0-2.0 mm) are investigated. The results imply that the overall requirement of gasification energy increases with increasing gasification temperature, steam to biomass ratio, fluidization velocity, and decreases with adsorbent to biomass ratio whilst no significant increase is observed by varying the biomass particle size. However, a slight reduction in required energy is observed from 600 °C to 675 °C which might be due to strong CO2 adsorption, an exothermic reaction, and contributes to the energy requirements of the process. Besides, hydrogen-based energy efficiencies increase with increasing temperature while first increases to a medium value of steam to biomass ratio (2.0), adsorbent to biomass ratio (1.0) and fluidization velocity (0.21 m/s) followed by a slight decrease (or remains unchanged). The integrated catalytic adsorption steam gasification is found to be a high energy consuming process and thus, waste heat integration needs to be implemented for feasible hydrogen production.

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Section: Char Gasification Reaction (Cgr)mentioning

confidence: 99%

Assessment of energy flows and energy efficiencies in integrated catalytic adsorption steam gasification for hydrogen production

et al. 2018

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“…The energy flow stream method gives higher HPT energy efficiencies at a turbine load of 80% in comparison with turbine load of 60%, while the isentropic method resulted in a reversed conclusion (the energy efficiency of the HPT obtained by the isentropic method is higher at a load of 60%, in comparison with a load of 80%). The difference in the HPT's energy efficiency between the load of 60% and the load of 80% is higher for the energy flow stream method, therefore, the equation (21) results in higher values of the overall energy efficiency for the load of 80% than for the load of 60%.…”

Section: The Overall Hpt Energy Analysismentioning

confidence: 96%

“…Along with the energy, an exergy analysis of various power plants: solid fuel-fired [19], CHP [20], multigeneration [21], steam supercritical [22] and nuclear [23], which takes into account the ambient state (temperature and pressure of the ambient) in which power plant and all of the plant's components operate, is widely used nowadays.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Energy Flow Stream and Isentropic Method for Steam Turbine Energy Analysis

et al. 2019

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In this paper, a comparison of two different methods for a steam turbine energy analysis is presented. A high-pressure steam turbine from a supercritical thermal power plant (HPT) was analysed at three different turbine loads using the energy flow stream (EFS) method and isentropic (IS) method. The EFS method is based on steam turbine input and output energy flow streams and on the real steam turbine produced power. The method is highly dependable on the steam mass flow rate lost through the turbine gland seals. The IS method is based on a comparison of turbine steam expansion processes. Observed energy analysis methods cannot be directly compared because they are based on different sources of steam turbine energy losses, so, an overall steam turbine energy analysis is presented. Unlike most steam turbines from the literature, the analysed HPT did not have the highest overall energy efficiency at a full load due to exceeding the water/steam critical pressure at the turbine inlet during such operation.

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“…Heat exchanger unit's capital cost is determined as [30] Capital cost of HRVG unit is estimated as [28] where Q HRVG is amount of heat transfer at HRVG, m ORC is organic fluid flow rate and m gas is flue gas flow rate. Capital cost of air turbine is estimated as [30]:…”

Section: Economic Analysismentioning

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, exergy and economic assessments of a novel integrated biomass based multigeneration energy system with hydrogen production and LNG regasification cycle

Cited by 113 publications

References 43 publications

Assessment of energy flows and energy efficiencies in integrated catalytic adsorption steam gasification for hydrogen production

Assessment of energy flows and energy efficiencies in integrated catalytic adsorption steam gasification for hydrogen production

Comparison of Energy Flow Stream and Isentropic Method for Steam Turbine Energy Analysis

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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