Effect of precooled inlet gas temperature and mass flow rate on final state of charge during hydrogen vehicle refueling

Cebolla, R. Ortiz; Acosta, B.; Miguel, N. de; Moretto, Pietro

doi:10.1016/j.ijhydene.2015.02.035

Cited by 74 publications

(18 citation statements)

References 11 publications

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“…The experimental studies by Cebolla et al have also reported the cooling requirement for improvement of SOC of the tank. 46 The density obtained by filling of precooled H 2 is very near to target density of 40.2 kg/m 3 , and the SOC varies from 91% to 96%. However, the SOC could not be achieved the desired mark of 100%, but it is improved by an average of 2% to 3% at all filling rates for −40 and −20 C. The SOC obtained at a supply temperature of 0 C is close to the desired range for slow filling rates but decreases to less than 90% for higher filling rates.…”

Section: Simulation Resultsmentioning

confidence: 77%

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Investigation of compressed hydrogen refueling process of 60 L type IV tank used in fuel cell vehicles

et al. 2019

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Hydrogen fuel cell vehicle provides the significant advantage of high energy conversion efficiency and zero emission. Efficient hydrogen storage methods are vital for successful implementation of the hydrogen‐related technologies. Compressed hydrogen storage has been considered as a promising option in recently commercialized hydrogen fuel cell vehicles. The short filling time and high state of charge of compressed hydrogen storage tank are an essential requirement for fuel cell vehicles. This study presents the detail investigation of refueling compressed storage tank using computational fluid dynamics simulation and heat capacity model. The goal of the simulation is to identify the end temperature and state of charge. Initially, the mathematical model of end temperature and state charge is formulated. Later, the overall heat transfer involved in the refueling process is investigated by heat capacity model based on MC method defined by SAE J2601. The density obtains from the simulation is compared with the National Institute of Standards and Technology database. The SE in simulated results for the state of charge is reduced to <1% after applying the heat capacity method. The results may shade light on better understanding the refueling process of compressed hydrogen storage for fuel cell vehicle.

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Section: Simulation Resultsmentioning

confidence: 77%

“…However, dependency of SOC on supply temperature cannot be ignored because at higher supply temperature it goes below the desired mark of 90%. The experimental studies by Cebolla et al have also reported the cooling requirement for improvement of SOC of the tank …”

Section: Resultsmentioning

confidence: 99%

Investigation of compressed hydrogen refueling process of 60 L type IV tank used in fuel cell vehicles

et al. 2019

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“…Both of them are set as the fitted parameters. Equation (13) is utilized to fit with the reference data [14], the results show a good agreement as shown in Figure 1, and the values of fitted parameters are listed in Table 1.…”

Section: Effect Of Inflow Temperature On Socmentioning

confidence: 68%

“…As stated above, the full-fill density of 70 MPa tank at 15 • C is 40.2 g/L, so the full-fill mass for these two tanks are 1.608 kg (Type III) and 1.1658 kg (Type IV), respectively. From [14], the initial pressure p 0 for the two tanks is set as 2 MPa, and both tanks are filled up to a final pressure p of 77-78 MPa, the ambient temperature T f is controlled at 291-300 K. Herein, the initial temperature T 0 inside tank is considered to be the same as the ambient temperature.…”

Section: Resultsmentioning

confidence: 99%

“…The final temperature and mass of compressed hydrogen in a tank after a refueling process can be estimated using the analytical solutions of a lumped parameter thermodynamic model of a high pressure compressed hydrogen storage system [13]. Filling experiments with different inlet gas temperatures and mass flow rates have been executed using two different types of on-board tanks (Type III and IV) [14]. Besides, the thermodynamic model can be utilized to deduce the analytical solution of the inflow temperature [15] and hydrogen mass [16].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Hydrogen Refueling Parameters on Final State of Charge

Xiao

Wang

et al. 2019

Energies

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The state of charge (SOC) is a key indicator to show whether a compressed hydrogen tank meets refueling requirements, so it is worth to study effects of the refueling parameters on it. A new SOC analytical solution is obtained based on a simple thermodynamic model. By applying a mass balance equation and an energy balance equation for a hydrogen storage system, a differential equation was obtained. An analytical solution of hydrogen temperature was deduced from the solution of the differential equation, then an analytical solution of hydrogen mass was further deduced based on the analytical solution of hydrogen temperature with some mathematical modifications. By assuming the hydrogen density inside the tank is uniform, the SOC, which defined as a ratio of hydrogen density to the full-fill density, can be transformed to be the ratio of hydrogen mass to the full-fill mass. The hydrogen mass can be calculated from analytical solution of hydrogen mass, while the full-fill mass is supposed to be a constant value. The full-fill density of 35 MPa and 70 MPa tanks at 15 °C are respectively 24.0 g/L and 40.2 g/L, and if the volume of the tank is known, the full-fill mass can also be calculated. The analytical solution of SOC can be unitized to express the reference data, the contributions of inflow temperature and mass flow rate on SOC are presented for a Dynetek type III tank (40 L, metallic liner) and a Hexagon type IV tank (29 L, plastic liner). In addition, the two-parameter effect of inflow temperature and mass flow rate on SOC are presented. The Nusselt number and Reynolds number are utilized to modify the analytical model, the relationship between SOC and refueling parameters can be obtained through the method of fitting. The fittings show a good agreement. The SOC can be determined from the refueling parameters based on the model with more physical meaning. The method developed in this research can be applied to the control algorithm of refueling stations to ensure safety and efficiency.

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Hydrogen as Sustainable and Green Energy Resource

Dutta

2018

Kirk-Othmer Encyclopedia of Chemical Technology

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Hydrogen is a clean fuel that can be used as the major energy resource. Hydrogen can be produced from various renewable and sustainable sources. Cost of hydrogen is high when it is produced from alternative sources. Hydrogen can be utilized as an energy source when it can be produced from cheap and renewable source. Emphasis should be given to those methods that have a low CO 2 footprint. Purification, transportation, and storing are important aspects that can be emphasized. Hydrogen is used as fuel in internal combustion engine ( ICE ) and fuel cell electric vehicle ( FCEV ). The cost of FCEV is higher than car with ICE . However, the FCEVs have more fuel efficiency than ICE car. Suitable materials should be developed for storing hydrogen in both liquid and compressed gas form. Lightweight, high mechanical strength, and low‐cost materials are preferred for this purpose. Safety issues should be taken care for production, fueling, and transportation systems.

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Effect of precooled inlet gas temperature and mass flow rate on final state of charge during hydrogen vehicle refueling

Cited by 74 publications

References 11 publications

Investigation of compressed hydrogen refueling process of 60 L type IV tank used in fuel cell vehicles

Investigation of compressed hydrogen refueling process of 60 L type IV tank used in fuel cell vehicles

Effect of Hydrogen Refueling Parameters on Final State of Charge

Hydrogen as Sustainable and Green Energy Resource

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