Research on transient heat transfer of ball valves in high-pressure liquid hydrogen receiving stations

• Published in: Results in engineering Vol. 19; p. 101285
• Main Authors: Li, Shuxun, Zheng, Mingxing, Wang, Yixue, Yang, Lingxia, Zhang, Bohao, Zhang, Jianzheng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2023; Elsevier
• Subjects: Conjugate heat transfer; Heat flow density; Liquid hydrogen; Transient stress; Ultra-low temperature valve; Conjugate heat transfer; Ultra-low temperature valve; Transient stress; Liquid hydrogen; Heat flow density
• ISSN: 2590-1230; 2590-1230
• DOI: 10.1016/j.rineng.2023.101285

As one of the most important fluid control devices in the liquid hydrogen receiving station, the liquid hydrogen ball valve's performance directly affects the system's stability. Aiming at the problem of insufficient cold shrinkage compensation ability of ball valve under high-temperature difference and excessive flow rate during the working process, a high-pressure liquid hydrogen hollow ball valve with elastic compensation ability is designed. Based on the conjugate heat transfer method, the transient conjugate heat transfer and transient thermal stress analysis were carried out on the high-pressure hollow ball valve of the liquid hydrogen receiving station. The results show that the transient temperature of each part of the ball valve decreases under different flow rates, and the closer to the flow part of the medium, the faster the cooling. In the initial stage, the larger the flow rate of liquid hydrogen, the greater the heat flux density of the fluid-solid interface, but after a certain period, the large flow rate is cooled to a greater extent, the heat transfer is weakened, and the heat flux density is smaller. Under different flow rates, the transient thermal stress of the key components of the ball valve first increases sharply and then decreases. At large flow rates, the temperature change is more obvious, and the maximum stress of each component increases. The research results have guiding significance for designing and applying ball valves in high-pressure liquid hydrogen receiving stations. •Designed a high-pressure hollow ball valve for liquid hydrogen receiving station.•Using the conjugate heat transfer method to simulate the working process of a high-pressure liquid hydrogen ball valve.•Analyzing the instantaneous temperature distribution of the ball valve and the instantaneous heat flux density of the fluid-solid interface under different inlet flow rates.•Studying the transient thermal stress of the ball valve.