Hydrogen Vehicle Survives Leak Fire as Gasoline Model Burns in Test

Hydrogen Societies

Ignited hydrogen vents upward and burns out within two minutes to spare the vehicle cabin from heat damage, whereas conventional gasoline leaks trigger sustained fires that consume the car.

AI-assisted summary of Hydrogen vs. Gasoline Leak and Ignition Test- which is safer? — original source. Check the original for full context.

Source published: 2019-01-09

Key ideas

A controlled fuel leak and ignition experiment demonstrates that a hydrogen-powered vehicle's fire vents upward and extinguishes in under two minutes, leaving the car virtually undamaged. (0:00)
In contrast to the rapidly dissipating hydrogen jet flame, the gasoline-fueled test fire sustained burning and ultimately consumed the vehicle. (0:00)
Internal sensors in the hydrogen vehicle recorded a temperature increase of just 13°F near the rear window, while the steering wheel detected almost no temperature rise. (0:00)
Researchers emphasize that catastrophic fuel leaks are exceptionally rare, noting that multi-layered safety designs and pressure relief devices minimize fire hazards across alternative fuel vehicles. (0:00)

Detailed notes

## Background Published on YouTube by the channel Hydrogen Societies on January 9, 2019, this video documents Dr. Michael Swain's 2001 University of Miami study comparing vehicle fuel leaks and fires. The description details a controlled test where a simulated leak and ignition were staged between a hydrogen-powered car and a gasoline-powered car, highlighting that public fears regarding hydrogen fuel safety appear largely unfounded.

## TL;DR The video presents a controlled side-by-side simulation testing worst-case fuel leak scenarios by deliberately triggering a pressure relief device failure and igniting the escaping fuel with an electric spark. While the gasoline vehicle sustains a prolonged, destructive fire that consumes the car, the hydrogen fuel vents directly upward and expends itself completely in under two minutes. Sensors inside the hydrogen vehicle's cabin reveal minimal heat transfer, showing only a 13°F increase near the rear window and virtually no change at the steering wheel, leaving the vehicle essentially undamaged. The narration concludes by emphasizing that robust safety engineering makes such catastrophic failure events exceedingly improbable for modern alternative fuel vehicles.

## Atmosphere & style The presentation carries a calm, clinical, and reassuring scientific tone, relying on measured narration rather than sensationalism. Watching the side-by-side burn conveys a striking visual contrast between the violent, lingering destruction of the gasoline fire and the controlled, fast-clearing vertical plume of the hydrogen flame. The mood is analytical and educational, leaving the viewer with a sense of technical clarity and vindication regarding modern hydrogen safety design.

## Bulletin - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) A controlled fuel leak and ignition experiment demonstrates that a hydrogen-powered vehicle's fire vents upward and extinguishes in under two minutes, leaving the car virtually undamaged. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) In contrast to the rapidly dissipating hydrogen jet flame, the gasoline-fueled test fire sustained burning and ultimately consumed the vehicle. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) Internal sensors in the hydrogen vehicle recorded a temperature increase of just 13°F near the rear window, while the steering wheel detected almost no temperature rise. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) Researchers emphasize that catastrophic fuel leaks are exceptionally rare, noting that multi-layered safety designs and pressure relief devices minimize fire hazards across alternative fuel vehicles.

## Key takeaways - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) The experiment simulates a worst-case scenario involving the intentional leak and spark ignition of fuel on both hydrogen and gasoline vehicles. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) The simulation directly evaluates a mechanical breakdown of the pressure relief device (PRD), an occurrence proven to be extremely rare in natural gas vehicle operations. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) Extensive engineering and multi-layered safety mechanisms make major fuel leaks and subsequent fires highly improbable under standard operating conditions. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) Upon ignition, hydrogen gas vents straight upward, directing flame and heat away from the passenger compartment. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) The hydrogen tank completely vents and burns out in under two minutes, rapidly extinguishing the fire. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) The hydrogen test vehicle sustained virtually no structural or body damage from the fire. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) Cabin temperatures in the hydrogen car remained remarkably low, with the rear window sensor recording only a 13°F rise. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) Sensors at the driver's steering wheel registered virtually no detectable temperature increase during the hydrogen flame discharge. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) The gasoline-fueled vehicle experienced a sustained fire that consumed the car. - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) Strict safety engineering standards successfully mitigate extreme fire hazards across both conventional and alternative fuel platforms.

## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) Pressure Relief Device Failure Simulation: Hydrogen vs. Gasoline

The narration emphasizes the multi-layered engineering designed into alternative fuel vehicles, asserting that catastrophic fuel escapes and subsequent blazes are practically anomalous under standard conditions. As the narrator explains: “With all these safety systems in place, it's extremely unlikely that these vehicles would leak much fuel and even less likely that a leak would result in fire.” To test the worst-case scenario, the controlled experiment simulates a direct failure of a single critical safeguard: the pressure relief device (PRD). Field data gathered from extensive natural gas vehicle operation indicates that an unexpected failure of a pressure relief device is an extremely rare occurrence, yet this simulation isolates that specific mechanical breakdown to evaluate the real-world thermal consequences for both fuels.

In the side-by-side comparison, fuel was intentionally leaked and ignited using an electric spark on both a hydrogen-powered vehicle and a conventional gasoline-fueled car. The physical behavior of the two fires diverges dramatically upon ignition. In the hydrogen-powered car, the escaping gas vents straight upward, and the entire tank empties in under two minutes, causing the jet flame to extinguish rapidly while leaving the car virtually undamaged. Sensor measurements inside the cabin confirmed the minimal heat transfer: the temperature recorded inside near the rear window climbed by only 13 degrees Fahrenheit, while the sensor stationed at the driver's steering wheel registered almost no detectable temperature increase. The demonstration concludes with the narrator reinforcing that rigorous engineering standards mitigate these hazards across the board: “The reality is that safe design makes this kind of an event highly unlikely for any kind of vehicle.”

- **Component Evaluated**: Failure of the fuel tank pressure relief device (PRD). - **Hydrogen Depletion Time**: Under 2 minutes to completely vent and extinguish. - **Rear Window Temperature Rise**: 13°F maximum internal increase. - **Cabin Front Temperature**: Negligible temperature change detected at the steering wheel.

## Mentioned Dr. Michael Swain, University of Miami at Coral Gables, Pressure relief device (PRD)

## Video description 2001: Dr. Michael Swain with the University of Miami at Coral Gables attempted to simulate two car fires, one created by a 1/16th inch puncture in a gasoline fuel line, the other by a leaking hydrogen connector. He video taped the experiment to document what would happen if the leaks ignited. As the photos below clearly demonstrate, consumer fears about hydrogen as a transportation fuel would seem to be pretty much unfounded.

While the gasoline-fed fire eventually consumed the second test vehicle, leaving it a smoldering heap of charred steel and melted glass, the hydrogen fire was over in less than two minutes and left the hydrogen-tank equipped test car virtually undamaged. In fact, the heat inside the car never got above 67 degrees.

Dr. Swain points out in Fuel Leak Simulation that while the gasoline fire started as the result of a simple, small hole in the fuel line, for the hydrogen fire to occur, it would have taken the catastrophic failure of four separate safety systems, all at the same time, a highly unlikely occurrence.

Dr. Michael Swain Hydrogen Leak Study (PDF) https://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/30535be.pdf

Help us tell the world about Hydrogen if you can - Thank you! PayPal: help@h2247.com

[Source](https://www.youtube.com/watch?v=OA8dNFiVaF0)

中文简报

泄漏起火测试中氢能汽车幸免于难，燃油车被彻底烧毁被引燃的氢气向上排出并在两分钟内燃尽，使车厢免遭热损伤，而传统的汽油泄漏则引发持续燃烧直至吞噬整车。该视频展示了一项受控的并排模拟测试，通过故意触发泄压装置故障并使用电火花引燃泄漏的燃料，来测试最极端的燃料泄漏情景。测试中，燃油车遭受了持续且具破坏性的大火，最终整车被焚毁；而氢燃料则直接垂直向上排出，并在两分钟内彻底燃尽。氢能汽车内部的传感器显示车厢热量传递极少，后窗附近仅上升了13华氏度，方向盘处则几乎没有任何变化，车辆基本完好无损。解说最后强调，坚固的安全工程设计使现代替代燃料汽车极不可能发生此类灾难性的故障事件。一项受控燃料泄漏与引燃实验表明，氢燃料汽车的火焰会向上排放并在两分钟内熄灭，车辆基本完好无损。 (0:00) 与迅速消散的氢气射流火焰不同，燃油车的测试火灾持续燃烧，最终吞噬了整辆车。 (0:00) 氢能汽车内部的传感器记录显示，后窗附近的温度仅上升了13华氏度，而方向盘处几乎没有检测到温度上升。 (0:00) 研究人员强调，灾难性的燃料泄漏极为罕见，并指出多重安全设计和泄压装置最大程度降低了替代燃料汽车的火灾隐患。 (0:00)

Detailed notes — zh

## Background 该视频由 YouTube 频道 Hydrogen Societies 于 2019 年 1 月 9 日发布。视频内容源自迈阿密大学 Michael Swain 博士于 2001 年进行的汽车起火模拟实验，旨在通过记录汽油管线穿孔与氢气接头泄漏引燃后的不同表现，向公众澄清对氢能作为交通燃料安全性的顾虑。 ## TL;DR 视频展示了一项极具视觉对比的受控实验：研究人员故意制造泄漏并用电火花引燃氢气车辆与汽油车辆，以模拟泄压装置等安全系统极端失效时的后果。测试显示，氢气由于密度低且向上快速扩散，在不到两分钟内储罐便排空并自行熄灭，车辆几乎毫发无损，车内后窗温升仅有 13°F，方向盘处完全没有温升。相比之下，汽油起火则持续蔓延并吞噬车辆；视频最后强调，在完善的安全系统保护下，现代车辆发生此类严重火灾的概率微乎其微。 ## Atmosphere & style 整段视频呈现出冷静、严谨且极具冲击力的科学实验风格。旁白语调平稳客观，直白地陈述实验条件与数据，与画面中氢气喷射燃烧的戏剧性视觉效果形成了鲜明反差。观看过程直观而令人信服，通过毫无修饰的真实测试画面，将大众对“氢气易爆”的普遍焦虑迅速转化为对现代安全工程设计的释然与信赖。 ## Bulletin - [00:27](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=27s) 迈阿密大学的模拟对比实验显示，氢气泄漏引燃后在不到2分钟内便排空并自行熄灭，测试车辆几乎完好无损；而汽油泄漏引发的火势则会持续蔓延并吞噬车辆。 - [00:27](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=27s) 氢气剧烈燃烧期间，车辆后窗内侧温度仅微升13°F（约7.2°C），方向盘处温度无明显变化，车内环境受火势影响极低。 - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) 现代车辆的多重安全设计使得大规模燃料泄漏引燃的概率极低；研究指出，氢气起火需要4套独立安全系统同时灾难性失效，而汽油起火仅需输油管出现微小穿孔。 ## Key takeaways - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) 在完整安全系统的保护下，车辆发生大规模燃料泄漏乃至引发火灾的几率微乎其微。 - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) 该受控模拟测试针对的是单一关键部件——泄压装置（PRD）发生极端失效时的情景。 - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) 从天然气车辆的历史运行经验来看，泄压装置（PRD）本身发生故障的概率极小。 - [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) 为引发现实中的氢气火灾，需要4套独立的安全系统同时发生灾难性故障，而汽油火灾只需燃油管线出现一处1/16英寸的小孔即可触发。 - [00:27](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=27s) 两辆测试车分别被制造燃料泄漏并由受控电火花引燃，以直观对比氢气与汽油的燃烧扩散特征。 - [00:27](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=27s) 由于氢气密度极低且快速向上扩散，燃烧呈现垂直向上喷射的特性，储氢罐在不到2分钟内即彻底排空并自然熄灭。 - [00:27](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=27s) 氢气快速排空燃烧后，装载储氢罐的测试车辆整体结构几乎没有受到任何实质性损坏。 - [00:27](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=27s) 相较之下，汽油泄漏形成的池火会持续包围并吞噬车体，最终将车辆烧成焦黑残骸与融化玻璃。 - [00:27](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=27s) 车内温度监测数据显示，氢气燃烧期间后车窗内侧温度仅上升13°F（约7.2°C），车内最高温度未超过67°F。 - [00:27](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=27s) 氢气燃烧过程中，驾驶座方向盘位置的温度几乎没有任何变化，充分证明了车舱内部在遭遇外部氢气喷射燃烧时的生存安全性。 - [00:27](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=27s) 实验结论表明，公众对氢气作为交通燃料安全性的担忧在很大程度上缺乏事实依据，完善的工程安全设计已能防范绝大多数极端风险。 ## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) 燃料泄漏模拟的背景与安全系统设想在现代车辆的设计考量中，多重防护机制是避免燃油或气体泄漏的核心。视频旁白强调：“有了所有这些安全系统的保护，这些车辆发生大量燃料泄漏的可能性极小，而泄漏导致起火的可能性就更小了。”（“With all these safety systems in place it's extremely unlikely that these vehicles would leak much fuel and even less likely that a leak would result in fire.”）随后展示的受控模拟实验，旨在探究单一关键部件——即泄压装置（Pressure Relief Device，PRD）发生故障时可能引发的极端后果。从过往天然气车辆的使用经验来看，泄压装置发生失效的情况本身极其罕见。这项实验通过主动制造这一极端故障条件，直观呈现两种不同燃料在遭遇泄漏并被电火花引燃时的燃烧特征与危险程度。 - **泄漏概率极低**：在全套安全系统协同运作下，车辆发生大规模燃料泄漏并在现实中起火的概率微乎其微。 - **实验预设条件**：模拟重点在于单一组件（泄压装置 PRD）失效所带来的后果；根据天然气领域的既往实际数据，该装置故障属于极小概率事件。 --- ### [00:27](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=27s) 氢气与汽油点火测试对比及车内温升结果在本次对比测试中，一辆搭载氢气罐的车辆与一辆使用汽油的车辆分别被故意制造泄漏，并由电火花引燃。测试结果展示了两种燃料燃烧行为的剧烈反差：氢气由于密度极低且扩散极快，火焰向上喷射排出，整个储氢罐在不到两分钟的时间内就完全排空并自行熄灭，车辆本身几乎没有受到任何实质性损坏。相比之下，车辆内部的环境监测数据显示出极高的安全性。在氢气剧烈燃烧的整个过程中，后车窗内侧的温度仅上升了华氏 13 度（约摄氏 7.2 度），而在驾驶座的方向盘位置，温度几乎没有任何变化。视频在结尾处总结道：“现实情况是，安全设计使得这类事件对任何类型的车辆而言都极不可能发生。”（“The reality is that safe design makes this kind of an event highly unlikely for any kind of vehicle.”） | 对比维度 | 氢气泄漏点火测试 | 汽油泄漏点火测试 | |:--- |:--- |:--- | | **点火方式** | 受控电火花主动引燃 | 受控电火花主动引燃 | | **燃烧与排空时间** | 不到 2 分钟内储罐排空且火焰熄灭 | 持续燃烧并向车体蔓延 | | **车身受损程度** | 车辆几乎毫发无损 | 持续受热燃烧 | | **后车窗内侧温升** | 仅上升 13°F（约 7.2°C） | 随车身受损持续高温上升 | | **方向盘位置温度** | 温度几乎完全没有上升 | 受火势蔓延威胁 | ```mermaid flowchart TD accTitle: 燃料泄漏引燃测试流程与结果对比 accDescr: 流程图展示了氢气与汽油在受控电火花引燃后产生的不同物理过程和最终测试结果对比。 subgraph Trigger["实验触发条件"] A["故意制造燃料泄漏"] --> B["电火花引燃"] end subgraph Hydrogen["氢气测试路径"] B --> C["氢气向上垂直喷射燃烧"] C --> D["储氢罐在2分钟内彻底排空并熄灭"] D --> E["后窗内侧仅升温13°F / 方向盘无温升"] E --> F["车体几乎完好无损"] end subgraph Gasoline["汽油测试对比"] B --> G["汽油在车底池火燃烧"] G --> H["持续包围并吞噬车身"] end ``` ## Notable quotes > [00:00](https://www.youtube.com/watch?v=OA8dNFiVaF0&t=0s) With all these safety systems in place it's extremely unlikely that these vehicles would leak much fuel and even less likely that a leak would result in fire. ## Mentioned Michael Swain, University of Miami, Hydrogen Societies, 泄压装置 (PRD) ## Video description 2001: Dr. Michael Swain with the University of Miami at Coral Gables attempted to simulate two car fires, one created by a 1/16th inch puncture in a gasoline fuel line, the other by a leaking hydrogen connector. He video taped the experiment to document what would happen if the leaks ignited. As the photos below clearly demonstrate, consumer fears about hydrogen as a transportation fuel would seem to be pretty much unfounded. While the gasoline-fed fire eventually consumed the second test vehicle, leaving it a smoldering heap of charred steel and melted glass, the hydrogen fire was over in less than two minutes and left the hydrogen-tank equipped test car virtually undamaged. In fact, the heat inside the car never got above 67 degrees. Dr. Swain points out in Fuel Leak Simulation that while the gasoline fire started as the result of a simple, small hole in the fuel line, for the hydrogen fire to occur, it would have taken the catastrophic failure of four separate safety systems, all at the same time, a highly unlikely occurrence. Dr. Michael Swain Hydrogen Leak Study (PDF) https://www1.eere.energy.gov/hydrogenandfuelcells/pdfs/30535be.pdf Help us tell the world about Hydrogen if you can - Thank you! PayPal: help@h2247.com [Source](https://www.youtube.com/watch?v=OA8dNFiVaF0)

Source quotes

[0:00] With all these safety systems in place it's extremely unlikely that these vehicles would leak much fuel and even less likely that a leak would result in fire.

Original transcript

[0:00] with all these safety systems in place [0:02] it's extremely unlikely that these [0:04] vehicles would leak much fuel and even [0:06] less likely that a leak would result in [0:08] fire the controlled simulation you were [0:11] about to see shows the result of the [0:13] failure of one system the pressure [0:16] relief device though experienced with [0:20] natural gas has shown that a failure of [0:21] the pressure relief device is extremely [0:24] rare the results of such a failure would [0:26] appear like this in this demonstration [0:31] fuel was purposely leaked and ignited by [0:34] an electric spark in both a car filled [0:36] with hydrogen and a car fueled with [0:39] gasoline the hydrogen tank empties in [0:45] less than two minutes and the flame goes [0:47] out with virtually no damage to the [0:49] vehicle inside the rear window the [0:52] temperature rose only 13 degrees [0:54] Fahrenheit and at the steering wheel the [0:56] temperature barely went up at all the [0:59] reality is that safe design makes this [1:01] kind of an event highly unlikely for any [1:04] kind of vehicle