Christoph Meraner, Reidar Stølen, Ellen Synnøve Skilbred, Tian Li
{"title":"Large-scale experimental study of open, impinging and confined hydrogen jet fires","authors":"Christoph Meraner, Reidar Stølen, Ellen Synnøve Skilbred, Tian Li","doi":"10.1016/j.jlp.2025.105614","DOIUrl":null,"url":null,"abstract":"<div><div>Hydrogen tanks used in transportation are equipped with thermal pressure relief devices to prevent a tank rapture in case of fire exposure. The opening of the pressure relief valve, in such a scenario, would likely result in an impinging and (semi-) confined hydrogen jet fire. Therefore, twelve large-scale experiments of hydrogen jet fires and one large-scale propane reference experiment have been conducted with various degrees of confinement, orientations of the jet, and distances from the nozzle to the impinging surface. Infrared and visible light videos, temperatures, heat fluxes, and mass flow rate of hydrogen or propane were recorded in each experiment. It was found that the hydrogen flame can be visible under certain conditions. The main difference between an open impinging jet and an enclosed impinging jet fire is the extent of the high-temperature region in the steel target. During the impinging jet fire test, 51% of the exposed target area exceeded 400 °C, while 80% of the comparable area exceeded 400 °C during the confined jet fire test. A comparison was also made to an enclosed propane jet fire. The temperature distribution during the propane fire was more uniform than during the hydrogen jet fire, and the localized hot spot in the impact region, as seen in the hydrogen jet fires, was not recorded.</div></div>","PeriodicalId":16291,"journal":{"name":"Journal of Loss Prevention in The Process Industries","volume":"96 ","pages":"Article 105614"},"PeriodicalIF":3.6000,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Loss Prevention in The Process Industries","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950423025000725","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Hydrogen tanks used in transportation are equipped with thermal pressure relief devices to prevent a tank rapture in case of fire exposure. The opening of the pressure relief valve, in such a scenario, would likely result in an impinging and (semi-) confined hydrogen jet fire. Therefore, twelve large-scale experiments of hydrogen jet fires and one large-scale propane reference experiment have been conducted with various degrees of confinement, orientations of the jet, and distances from the nozzle to the impinging surface. Infrared and visible light videos, temperatures, heat fluxes, and mass flow rate of hydrogen or propane were recorded in each experiment. It was found that the hydrogen flame can be visible under certain conditions. The main difference between an open impinging jet and an enclosed impinging jet fire is the extent of the high-temperature region in the steel target. During the impinging jet fire test, 51% of the exposed target area exceeded 400 °C, while 80% of the comparable area exceeded 400 °C during the confined jet fire test. A comparison was also made to an enclosed propane jet fire. The temperature distribution during the propane fire was more uniform than during the hydrogen jet fire, and the localized hot spot in the impact region, as seen in the hydrogen jet fires, was not recorded.
期刊介绍:
The broad scope of the journal is process safety. Process safety is defined as the prevention and mitigation of process-related injuries and damage arising from process incidents involving fire, explosion and toxic release. Such undesired events occur in the process industries during the use, storage, manufacture, handling, and transportation of highly hazardous chemicals.