Multi-Node Modeling of Cryogenic Tank Pressurization System Using Generalized Fluid System Simulation Program (GFSSP)

Bandyopadhyay, Alak; Majumdar, Alok; LeClair, A.; Valenzuela, Juan G.

doi:10.2514/6.2019-4122

Cited by 2 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The transient analytical model in [1] has flow and thermal models for the gas bottle, fluid flow lines and flow control orifice. Additionally, a thermodynamic model for the pressure regulator is added based on [2]. The solution of flow with friction and heat transfer through the flow lines are based on [3].…”

Section: Literature Reviewmentioning

confidence: 99%

Design and Mathematical Modeling of Fuel Feed System for Dual Fuel Scramjet

2023

5th ISSE National Conference (INAC-05) on Systems Approach for Self-Reliance in Advanced Technologies

View full text Add to dashboard Cite

A Fuel Feed System (FFS) is designed to supply fuels for a Dual Fuel Scramjet engine. The system design is carried out based on the operational requirements of flow rate, pressure, duration within the envelope constraints. The scramjet engine consists of an effervescent injector with liquid hydrocarbon as the main fuel. Gaseous Hydrogen is used for pilot ignition and for emulsifying the liquid hydrocarbon. Hydrogen gas for both the requirements are met through a single source and supply system. The liquid hydrocarbon storage system consists of a standalone propellant tank with positive expulsion device and cavitating venturis. Mathematical modelling is done on the system and from the model outputs, the operational efficacy of the feed system throughout the flight duration is ensured.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Design and Mathematical Modeling of Fuel Feed System for Dual Fuel Scramjet

2023

5th ISSE National Conference (INAC-05) on Systems Approach for Self-Reliance in Advanced Technologies

View full text Add to dashboard Cite

show abstract

“…where A I is the liquid-vapor interface area, and T V and T L are the vapor and liquid temperatures. Assuming natural convection as the dominant mechanism for this heat transfer, a standard correlation for this type of heat transfer is applied [12],…”

Section: 𝑇 = 𝑇 (𝑃)mentioning

confidence: 99%

The Effect of Liquid Hydrogen Tank Size on Self-Pressurization and Constant-Pressure Venting

Matveev

Leachman

2023

Hydrogen

View full text Add to dashboard Cite

Hydrogen represents a promising renewable fuel, and its broad application can lead to drastic reductions in greenhouse gas emissions. Keeping hydrogen in liquid form helps achieve high energy density, but also requires cryogenic conditions for storage as hydrogen evaporates at temperatures of about 20 K, which can lead to a large pressure build-up in the tank. This paper addresses the unsteady thermal modeling of cryogenic tanks with liquid hydrogen. Considering the liquid and vapor phases in the tank as two nodes with averaged properties, a lumped-element method of low computational cost is developed and used for simulating two regimes: self-pressurization (also known as autogenous pressurization, or pressure build-up in the closed tank due to external heat leaks) and constant-pressure venting (when some hydrogen is let out of the tank to maintain pressure at a fixed level). The model compares favorably (within several percent for pressure) to experimental observations for autogenous pressurization in a NASA liquid hydrogen tank. The two processes of interest in this study are numerically investigated in tanks of similar shapes but different sizes ranging from about 2 to 1200 m3. Pressure and temperature growth rates are characterized in closed tanks, where the interfacial mass transfer manifests initial condensation followed by more pronounced evaporation. In tanks where pressure is kept fixed by venting some hydrogen from the vapor domain of the tank, the initial venting rate significantly exceeds evaporation rate, but after a settling period, magnitudes of both rates approach each other and continue evolving at a slower pace. The largest tank demonstrates a six-times-lower pressure rise than the smallest tank over a 100 h period. The relative boil-off losses in continuously vented tanks are found to be approximately proportional to the inverse of the tank diameter, thus generally following simple Galilean scaling with a few percent deviation due to scale effects. The model developed in this work is flexible for analyzing a variety of processes in liquid hydrogen storage systems, raising efficiencies, which is critically important for a future economy based on renewable energy.

show abstract

Multi-Node Modeling of Cryogenic Tank Pressurization System Using Generalized Fluid System Simulation Program (GFSSP)

Cited by 2 publications

References 3 publications

Design and Mathematical Modeling of Fuel Feed System for Dual Fuel Scramjet

Design and Mathematical Modeling of Fuel Feed System for Dual Fuel Scramjet

The Effect of Liquid Hydrogen Tank Size on Self-Pressurization and Constant-Pressure Venting

Contact Info

Product

Resources

About