A Study on the Prediction of the Temperature and Mass of Hydrogen Gas inside a Tank during Fast Filling Process

Li, Jiqiang; Myoung, No-Seuk; Kwon, Jeong-Tae; Jang, Seon-Jun; Taeck-Hong, Lee

doi:10.3390/en13236428

Cited by 20 publications

(9 citation statements)

References 38 publications

(43 reference statements)

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“…For the analysis of the flow characteristics in the exhaust manifold, the incompressible threedimensional Navier-stokes equation, the continuity equation controlling the viscous flow in the flow field, and the momentum equation are used [3].…”

Section: Control Equationsmentioning

confidence: 99%

An Analysis on the Thermal Flow Characteristics of the Car Exhaust Manifold Geometry

Bao,

Kun-Zhang

2023

J. Phys.: Conf. Ser.

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The exhaust manifold is connected to the engine cylinder block and concentrates the exhaust from each cylinder into the exhaust manifold with divergent piping. Research on how the stability and efficiency of the exhaust manifold affects the aftertreatment system of an automobile is actively conducted. Therefore, this article studies to derive the most suitable model for the design of the exhaust manifold of an automobile by analyzing and comparing its pressure distribution, flow distribution, and temperature distribution according to the different shapes of the exhaust manifold. The thermal characteristics were studied and analyzed using FLUENT in ANSYS 2019R3. The results of the analysis are as follows, based on the results of the comparative analysis of the pressure distribution, case 1 shows a low-pressure difference of 200 Pa. In the results of the analysis of the flow rate, the flow rate fluctuations are confirmed in cases 3, 2 and 1 in sequence. Furthermore, when the temperature distribution was analyzed comparatively, it was found that the shape of the car exhaust manifold did not have an effect on the temperature. Therefore, as a result of these findings, the Case 1 model was inferred to be the most suitable model for the design of the exhaust manifold shape of the automobile.

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Section: Control Equationsmentioning

confidence: 99%

An Analysis on the Thermal Flow Characteristics of the Car Exhaust Manifold Geometry

Bao,

Kun-Zhang

2023

J. Phys.: Conf. Ser.

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“…Figure 2 is high-pressure tank for hydrogen storage. The pressure uses a pressure transmitter (P601 series) on the tank; the error of the sensor is ±0.25% [39]. Theoretical model of the high-pressure filling process for the compression hydrogen storage tank, as shown in Figure 3.…”

Section: Hydrogen Filling Modelingmentioning

confidence: 99%

An Analysis on the Compressed Hydrogen Storage System for the Fast-Filling Process of Hydrogen Gas at the Pressure of 82 MPa

Park

et al. 2021

Energies

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During the fast-filling of a high-pressure hydrogen tank, the temperature of hydrogen would rise significantly and may lead to failure of the tank. In addition, the temperature rise also reduces hydrogen density in the tank, which causes mass decrement into the tank. Therefore, it is of practical significance to study the temperature rise and the amount of charging of hydrogen for hydrogen safety. In this paper, the change of hydrogen temperature in the tank according to the pressure rise during the process of charging the high-pressure tank in the process of a 82-MPa hydrogen filling system, the final temperature, the amount of filling of hydrogen gas, and the change of pressure of hydrogen through the pressure reducing valve, and the performance of heat exchanger for cooling high-temperature hydrogen were analyzed by theoretical and numerical methods. When high-pressure filling began in the initial vacuum state, the condition was called the “First cycle”. When the high-pressure charging process began in the remaining condition, the process was called the “Second cycle”. As a result of the theoretical analysis, the final temperatures of hydrogen gas were calculated to be 436.09 K for the first cycle of the high-pressure tank, and 403.55 for the second cycle analysis. The internal temperature of the buffer tank increased by 345.69 K and 32.54 K in the first cycle and second cycles after high-pressure filling. In addition, the final masses were calculated to be 11.58 kg and 12.26 kg for the first cycle and second cycle of the high-pressure tank, respectively. The works of the paper can provide suggestions for the temperature rise of 82 MPa compressed hydrogen storage system and offer necessary theory and numerical methods for guiding safe operation and construction of a hydrogen filling system.

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“…Крім цього, у роботі [5] показано, що для забезпечення стабільного значення питомого теплового потоку під час циклічного термоімпульсного оброблення потрібен одночасний контроль маси заряду та тиску в камері під час генерації суміші й наповнення з подальшою корекцією часу обробки за визначеною початковою температурою паливної суміші. У роботі [6] Сучасні світові дослідження газодинамічного наповнення посудин здебільшого проводяться на прикладі гідрогену і визначають критичні значення таких параметрів: температури газу, термічних напружень у стінках посудин тощо [7][8][9][10][11]. Крім того, у згадуваних роботах і роботах [12][13][14] час наповнення посудин газом складав декілька хвилин, на відміну від процесу, що досліджується.…”

Section: вступunclassified

Числове Та Експериментальне Дослідження Наповнення Резервуару Компонентом Газової Суміші

Шипуль¹,

Заклінський²,

Комбаров³

et al. 2021

aktt

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The subject of the research is mathematical models of a gas-dynamic non-stationary process of filling a vessel with a component of a gas mixture. The aim of the study is the scientific and experimental substantiation of the choice of a model of filling a vessel with a component of a gas mixture with a given accuracy. The objectives of the study are to conduct full-scale experiments on filling the vessel with gas for further verification of the gas mixture generation control system, as well as in the development of adequate mathematical models of gas-dynamic flow, the analysis of simulation results, and the use of verified results in the system of automated generation of a gas mixture of a given accuracy by assessing the mass of its components depending on the filling parameters. The tasks are solved by studying the results of numerical modeling of the process and full-scale experiments. The following results are obtained. A series of full-scale experiments on filling a vessel with high-frequency monitoring of the pressure and temperature of the gas being filled was carried out. Significant factors were analyzed. The use of SAS SST turbulence models was substantiated. Models of the gas-dynamic unsteady process of filling the vessel with a component of the gas mixture for various values of the mass flow rate had been built. All the simulations were carried out using the ANSYS CFX software package. The influence of considering a heat exchange with the vessel walls on the studied parameters of the mixture is determined, namely: pressure, gas temperature averaged over the volume, gas temperature in a control point, mass of the component of a gas mixture. It was found that the deviation of the calculated data when using a model with an adiabatic condition on the wall compared to a model with a constant temperature regime is: for pressure – no more than 5 %, for averaged temperature – 6 %, for the temperature at the monitor point – 9 %, for mass – 1.5 %. The discrepancy between the simulation results and the full-scale experiment does not exceed 12 % in pressure and temperature at the monitor point, as well as 4 % in the mass of the component. By the experimentally determined accuracy parameter of the gas mixture (the mass of the mixture component in particular), the numerical models had been corrected to provide the mass value error of no more than 0.5 %.

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A Study on the Prediction of the Temperature and Mass of Hydrogen Gas inside a Tank during Fast Filling Process

Cited by 20 publications

References 38 publications

An Analysis on the Thermal Flow Characteristics of the Car Exhaust Manifold Geometry

An Analysis on the Thermal Flow Characteristics of the Car Exhaust Manifold Geometry

An Analysis on the Compressed Hydrogen Storage System for the Fast-Filling Process of Hydrogen Gas at the Pressure of 82 MPa

Числове Та Експериментальне Дослідження Наповнення Резервуару Компонентом Газової Суміші

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