Performance analysis of hydrogen fuel cell with two-stage turbo compressor for automotive applications

Ahsan, Nabeel; Rashid, Ans Al; Zaidi, Asad A.; Imran, Ramsha; Qadir, Sikandar Abdul

doi:10.1016/j.egyr.2021.05.007

Cited by 27 publications

(8 citation statements)

References 10 publications

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“…Taking the ohmic losses into account, the EHC voltage can be given according to ref. [40] as follows (27) with…”

Section: Discussionmentioning

confidence: 99%

“…The electric power requirement depends on the work w 1‐2 , the mass flow of air

\overset{m}{true}

, the molar mass m and the compressor efficiency η compr , which is assumed to be 0.7. [ 27 ] An expander is needed to recover some of the energy when the air is released into the environment. The expansion can be calculated according to the compression.…”

Section: Methodology and Boundary Conditionsmentioning

confidence: 99%

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Energetics of Technical Integration of 2‐Propanol Fuel Cells: Thermodynamic and Current and Future Technical Feasibility

et al. 2022

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Due to the increasing importance of hydrogen as an energy carrier in the transition to fully renewable energy systems, alternative technologies to the expensive storage and transportation of pure elemental hydrogen are required. The liquid organic hydrogen carrier (LOHC) technology represents a promising method for the chemical storage of hydrogen and can make use of the existing energy infrastructure for liquid fuels. Hydrogen storage in the LOHC system proceeds via the reversible hydrogenation and dehydrogenation of organic molecules in repeatedly applied storage cycles without emitting CO 2 . [1] One prominent LOHC system is based on the dibenzyltoluene (H0-DBT)/perhydro-dibenzyltoluene (H18-DBT) couple: H0-DBT acts as a hydrogenlean carrier. In an exothermic catalytic hydrogenation step, H0-DBT is loaded with hydrogen and forms the hydrogen-rich carrier H18-DBT. This compound can release hydrogen in an endothermic catalytic dehydrogenation reaction. The released hydrogen can then be used directly in a fuel cell. The major advantages of the LOHC technology are hydrogen storage and transport in a liquid state with very high volumetric and comparatively high gravimetric energy densities under ambient conditions.In general, it would be advantageous to combine the dehydrogenation and the fuel cell reaction in a single process step, i.e., to use the hydrogen-rich LOHC compound directly as fuel for a fuel cell. However, direct electrification of H18-DBT in fuel cells, has not been realized at an attractive performance level so far. [2] Instead, it has been found that secondary alcohols, such as 2-propanol, are attractive fuels for direct electrification. [3] Most interestingly, the dehydrogenation of 2-propanol in a proton exchange membrane (PEM) fuel cell setup stops at acetone and no CO 2 is formed. [4] The resulting acetone can be recharged with hydrogen via catalytic hydrogenation [5] or transfer hydrogenation. [6] Sievi et al. demonstrated that transfer hydrogenation from H18-DBT to 2-propanol can be highly energy efficient (>50%). The hydrogen-rich H18-DBT releases hydrogen in contact with acetone, producing 2-propanol and the hydrogen-lean H0-DBT. By feeding the fuel cell with 2-propanol, acetone is formed, which in turn can be converted back into 2-propanol

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“…Taking the ohmic losses into account, the EHC voltage can be given according to ref. [40] as follows (27) with…”

Section: Discussionmentioning

confidence: 99%

“…The electric power requirement depends on the work w 1‐2 , the mass flow of air

\overset{m}{true}

Section: Methodology and Boundary Conditionsmentioning

confidence: 99%

Energetics of Technical Integration of 2‐Propanol Fuel Cells: Thermodynamic and Current and Future Technical Feasibility

et al. 2022

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“…The rest surfaces are set as adiabatic walls. The standard k − ε model in simulations can be illustrated by Equations ( 19) and (20), which show the relationship between the dissipation rate in the turbulence flow ε and the turbulent kinetic energy of turbulence flow k.…”

Section: Boundary Conditions and Calculation Settingmentioning

confidence: 99%

Effects of Liquid Density on the Gas-Liquid Interaction of the Ionic Liquid Compressor for Hydrogen Storage

Guo

Wang

Geng³

et al. 2023

Energies

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As a new and promising compression technology for hydrogen gas, the ionic liquid compressor inherits the advantages of the ionic liquid and the hydraulic system. The liquid density is one of the key parameters influencing the fluid flow field, the sloshing of the bulk liquid, and the movement of droplets generated during the compressor operation. An appropriate selection of the liquid density is important for the compressor design, which would improve the thermodynamic performance of the compressor. However, the density of the ionic liquid varied significantly depending on the specific combination of the cation and anions. This paper proposed the methodology to select the optimal liquid density used in the ionic liquid compressor for hydrogen storage. The gas-liquid interaction in the compression chamber is analysed through numerical simulations under varied liquid density values. Results found that the increase in the liquid density promoted the detachment of the ionic liquid from the cylinder cover during the suction procedure and the contact of the bulk liquid on the compressor cover when the gas is compressed in the cylinder during the compression procedure. Both the droplet size and the dimension of the derived gas vortex decreased when the liquid density increased. The lowest mass transfer of hydrogen through the outlet was obtained at the density of 1150 kg/m3. The density of the ionic liquid from 1300 to 1450 kg/m3 is suggested to the hydrogen compressor, taking into account the transient two-phase flow characteristics, the mass transfer, and the total turbulent kinetic energy.

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“…The significant increase in the energy crisis has resulted in acute energy demand worldwide [1,2]. The conventional sources are limited and depleting over time.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Cobalt Nanoparticles for Biogas Enhancement from Green Algae Using Response Surface Methodology

Zaidi

Khan²,

Naseer³

et al. 2023

Period. Polytech. Chem. Eng.

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Organic matter may be converted to energy through various methods, but the most preferable one is the Anaerobic Digestion (AD), specifically for biogas production. In sustainable bioenergy production, it can undoubtedly be called one of the most widely used methods from the various feedstock. Over the past years, algae waste has become an increasingly acute environmental problem but luckily it can be used as feedstock to produce bioenergy. In order to improve the energy productivity of green algae, this study is focused on the introduction of cobalt (Co) nanoparticles (NPs) in the AD process. The concentration of Co NPs was optimized using response surface methodology (RSM). Mesophilic temperature range (25–45 °C), initial pH (5–9) and Co NPs dosage (0.5–2 mg/L) were selected as the independent variables for RSM. The results indicated that at optimized values (Co NPs concentration = 1 mg/L, initial pH = 7, and digestion temperature = 35 °C) produced the highest biogas yield of 298 ml. An experiment was carried out at optimized conditions to explore the effect on biogas production. The results showed that Co NPs had a positive influence on biogas yield. The low concentrations achieved higher biogas production as compared to higher ones. A maximum biogas yield of 678 mL is achieved by Co NPs (1 mg/L). AD performance was further evaluated by the modified Gompertz model. Different kinetic parameters were calculated. The values of the performance indicators confirmed that the mathematical model fitted well with experimental data.

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Performance analysis of hydrogen fuel cell with two-stage turbo compressor for automotive applications

Cited by 27 publications

References 10 publications

Energetics of Technical Integration of 2‐Propanol Fuel Cells: Thermodynamic and Current and Future Technical Feasibility

Energetics of Technical Integration of 2‐Propanol Fuel Cells: Thermodynamic and Current and Future Technical Feasibility

Effects of Liquid Density on the Gas-Liquid Interaction of the Ionic Liquid Compressor for Hydrogen Storage

Optimization of Cobalt Nanoparticles for Biogas Enhancement from Green Algae Using Response Surface Methodology

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