TA的每日心情 | 开心
2023-3-1 00:08 |
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目前的加氢站提供两种压力
- H35，350bar，大约5000psi
- H70，700bar，10000psi
Is hydrogen a gas or a liquid?
Hydrogen is a gaseous fuel that can be dispensed at two different pressures: H35, which is approximately 5,000 psi, and H70, which is 10,000 psi. Most stations have hydrogen delivered as a compressed gas, which is stored above ground in ASME-standard steel pressure vessels. Some stations have liquid hydrogen delivered as a liquid, which is stored above ground at a cryogenic temperature (-423ºF/-253ºC).
Hydrogen Station Configuration
-253C，什么样的制冷能这么给力。。。
MIRAI的贮氢罐有15年Warranty，下图是2016 Mirai，加氢口上写着“Do Not Refuel After 2029”
这是从Mirai的宣传手册里摘出来的，氢罐号称能经受225% Operating Pressure - 也即157500bar？这是能进入地幔的强度了。。。 不过小日本的质保，也就那么回事吧。。。
Are the hydrogen fuel tanks in a Toyota Mirai strong and safe enough?
The Mirai is as safe as any other Toyota. Its hydrogen fuel tanks are designed to withstand up to 225% of their operating pressure, which is a very high safety margin. They’ve even been shot at with high-velocity weapons.
The tanks’ main source of strength is their carbon fibre shell, over which there is a further layer of glass fibre. Should the car be involved in an accident, any damage to the hydrogen tank will be clearly visible on the glass fibre layer; tests can then be carried out to find out whether the carbon shell itself has been compromised. The whole tank is lined with plastic to seal in the hydrogen.
In the unlikely event of a leak, Mirai is fitted with highly sensitive sensors that can detect tiny amounts of hydrogen. These are placed in strategic locations for instant detection. Should a leak occur in the fuel system, the sensors will immediately shut down the safety valves and the vehicle itself.
As a third layer of safety, the cabin is strictly separated from the hydrogen compartment to prevent the ingress of any leaking hydrogen, which would instead gradually disperse into the atmosphere.
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雷达卡
楼主
显身卡
发表于 2019-4-19 01:41:07
