Determination of heat transfer parameters in hydrogen tanks in stationary refueling mode

Аuthors

Myakochin A. S.^*, Tlevcejev V. V.

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: amyakochin@gmail.com

Abstract

In this paper, the thermal state of the cylindrical shell of a hydrogen tank equipped with thermal insulation is investigated under stationary refueling conditions. The developed technique makes it possible to calculate the parameters of heat transfer in both liquid and vapor phases during this process. The creation of such a technique is a complex task requiring a multidimensional approach, but it has significant practical significance for improving the efficiency of refueling cryogenic fuel tanks.
One of the key aspects of optimizing the refueling process is the throughput of the drainage system. The effective operation of this system can significantly affect the speed and safety of refueling, which is especially important in conditions of high reliability requirements for cryogenic technologies. The article presents a simplified physical and mathematical model that serves to theoretically describe the processes occurring in hydrogen fuel tanks under stationary refueling conditions. Within the framework of this model, the thermal state of the tank shell is considered, which makes it possible to determine the parameters of heat exchange in wetted and non-wetted areas. The developed model is based on the assumption of an ideal drainage system and includes a numerical solution of the stationary equation of thermal conductivity. This allows us to identify the main parameters of heat exchange during the refueling process. The results show that in the uncoated part of the shell, heat exchange between the wall and hydrogen gas is carried out due to natural convection. This aspect is important for understanding the thermodynamic processes occurring inside the tank.
Thus, the proposed methodology and model can become the basis for further research and practical applications in the field of cryogenic technology. This will make it possible to more accurately predict the behavior of thermophysical processes in hydrogen tanks, which can lead to an improvement in their design and increase operational safety. The development of effective solutions for heat exchange management in such systems is essential to achieve high reliability and efficiency of cryogenic fuel systems. Ultimately, this may contribute to the development of new technologies for storing and transporting hydrogen, which is an urgent area in the field of energy and ecology.

Keywords:

cryogenic fuel tank, thermal protection, liquid hydrogen, boiling, natural convection, stationary regime, phase transition

References

1. Zarubin VS, Zimin VN, Kuvyrkin GN. Mathematical modeling of the temperature state of the shell of a cylindrical cryogenic container during filling and emptying. Matematika i matematicheskoe modelirovanie. 2015;(6): 44–60. DOI: 10.7463/mathm.0615.0829350 (In Russ.).
2. Cherkasov S.G., Moiseeva L.A. The effect of longitudinal heat transfer on the temperature distribution in a moving rib with an abrupt distribution of the heat transfer coefficient. Thermophysics of high temperatures. 2015;53(5):807–809. (In Russ.).
3. Verkin BI, Kirichenko YuA, Rusanov KV. Heat transfer during boiling of cryogenic liquids. Kyiv: Naukova dumka; 1987. 264 p. (In Russ.).
4. Yarkho SA. Heat transfer in the dispersed boiling regime of cryogenic liquids. Engineering and Physics Journal in Cryogenic Highways In: Investigation of heat transfer in aircraft. 1978;35(1):68–74. (In Russ.).
5. Vlit G, Ross DS. Turbulent natural convection on upand down-facing inclined surfaces with constant heat flow. Teploperedacha. 1975;(4):141–150. (In Russ.).
6. Gebkhart B, Dzhaluriya I, Makhadzhan R. Free convective flows, heat and mass transfer. Moscow: Mir; 1991. 678 p. (In Russ.).
7. Dzhaluriya I. Natural convection. Moscow: Mir; 1983. 400 p. (In Russ.).
8. Labuntsov DA. On the calculation of heat transfer during film boiling of liquid on vertical heating surfaces. Teploenergetika. 1963;(5):121–124. (In Russ.).
9. Tumanin EN. Thermal insulation of launch vehicle tanks, upper stages and space rocket blocks. Calculation, design, construction and testing of space systems. Rocket and Space Technology. Sbornik trudov RKK «Energiya». Series XII(1–2):284. (In Russ.).
10. Bershadskii VA, Kolomentsev AI. Fundamentals of technology for bench tests of liquid rocket propulsion systems. Part 2 «Complex development». Moscow: MAI, 2016. 162 p. (In Russ.).
11. Vargaftik NB. Handbook of thermophysical properties of gases and liquids. Moscow: Nauka; 1972. 720 p. (In Russ.).