日本中文在线观看,久久免费一级毛片,94色蜜桃网一区二区三区,四川一级护士一级毛片

FAQ
Question 4: How safe are hydrogen cylinders?

1.Type III, type IV carbon fiber cylinders, aluminium alloy or high-density polymer inner liner, peripheral carbon fiber winding, the main pressure-bearing structure of the carbon fibre itself.GB/T 35544-2017, carbon fiber cylinders for automotive use to do a detailed technical requirements and test specifications.

2. Gas cylinders should be shot, fire, fall can not explode.

3. When the cylinder is ruptured by gunshot, the high-purity hydrogen gas is released quickly, and it will not burn or explode.

4. 110 ° C or so over-temperature rapid release, not spread and not explode.

5.100 metres drop test, vehicle crushing, hydrogen bottle does not explode, not rupture. Internal pressure per square centimetre of about 350 kg, in dozens of square centimetres of contact surface, the external impact/pressure compared to the internal pressure is negligible.

6. When the valve stem breaks, high purity hydrogen leaks, and the cylinder does not fly away or burn. The aperture of the break point is only about 2 square millimetres, and the thrust is about 0.7 kg, which is not enough to launch a 4 kg cylinder into the sky, and the high-purity hydrogen leaks out instantly.

7. The hydrogen cylinder used on the hydrogen-powered drone is a type III carbon fibre cylinder produced by a central enterprise, Sinoma Technology, in line with the national pressure vessel standard GB/T15385-2011. The company has been granted a manufacturing licence for special equipment (pressure vessels) by the General Administration of Quality Supervision, Inspection and Quarantine. The three-type carbon fibre cylinders for hydrogen storage have an aluminium alloy inner liner and high-strength carbon fibre wrapped around the outer liner, and their safety has been verified 


Question 3: Principles of hydrogen fuel cells?

The more mature low-temperature PEM hydrogen fuel cell is a clean electrochemical power generator. There is no internal combustion, and the core temperature is typically between 40-65 degrees. Very few mechanical moving parts, low maintenance costs, high reliability.

 

Hydrogen is transported through an anode plate runner to the interior of the reactor, where it uniformly permeates through a diffusion layer to the catalytic layer and the proton exchange membrane. In the presence of a platinum catalyst, the protons are carried to the other side of the proton exchange membrane where they combine with oxygen atoms at the cathode to form water. The electrons return to the cathode through the loop through the load to form an electric current.

 

The area of the plates determines the amount of current. The number of stacked layers of the plate determines the voltage size The open circuit voltage of a single cell is about 1V, and the working voltage is about 0.65V. In practice, the conversion efficiency has reached 55%, 45% in the form of heat release.


Question 1: What are the advantages of hydrogen energy?

Hydrogen energy refers to the chemical energy released by the chemical reaction between hydrogen and oxygen, and is a clean secondary energy source with the advantages of wide source, high calorific value of combustion, high energy density, storable, renewable, electric, combustible, zero pollution, zero carbon emissions, etc. It is known as the "ultimate energy source" and "clean energy source" for controlling the earth's temperature rise and solving the energy crisis in the 21st century.


Question 2: How safe is hydrogen?

1. Hydrogen explosive mixture ratio of about 4-75% between, as a comparison, gasoline about 1.4%, natural gas 4.7% or more than the mixing ratio can be exploded.

2. hydrogen density is only air 1/14, upward diffusion rapidly, about 20m / s, not easy to accumulate, difficult to form explosive mixture conditions. 3. in the combustible gases, although than the mass of the highest calorific value, under the same conditions, than the volume of the lowest calorific value of natural gas is only 1/3 of the combustion of hydrogen explosion is a shrinkage reaction, 2 hydrogen molecules and 1 oxygen atom to form 2 water molecules, so the explosive energy is far lower than natural gas and petrol.

4. hydrogen ignition energy is low, but also need to 574C open flame to ignite.

5. Separate power generation and energy storage, not like the thermal runaway battery, control logic cut off the solenoid valve response will stop.

6. Easily detected, ppm level combustible gas alarms can be detected, very popular.


性爱 内射 在线 | 精品国产久久久久久久 | 一级毛带 一区二区 | 欧美一级淫乱视频 | 一级A一级a爱片免费免免3 | 无码毛片免费在看 | 无码少妇一区二区 | 成人乱人乱一区二区裸体女人 | 欧美一人一性一免费 | 国内精品免费视频 | 91亚洲精品一区二区乱码 | 男女无遮掩yyoo | 日本女优激情视频不卡在线免费观看 | 日本三级强伦轩中文字幕高清 | 日本变态大尺度无码专区 | 91在线精品秘 一区二区三区四区 | 亚洲色在线v中文字幕蜜桃一区 | 日韩在线自慰高潮 | 欧一美一交一配一交一交一视一频 | 午夜精品久久久久久无码蜜臀 | 久久激情精品视频 | 久久精品无码国产一区二区三区四区 | 亚洲日韩在线播放 | 亚洲免费观看观看 | 国产麻豆一级电影 | 亚洲av成人片无码网站 | 美女福利视频蝌蚪 | 蜜桃电影高清精品一区二区 | 97自拍九色超碰 | 小向美奈子乳巨码无在线观看网址 | 欧美理论熟女一区 | 国产又粗又大又猛又黄视频 | 国产精品久久久久一区二区三区 | 久久久精品一级毛片 | 欧美激情婷婷5月 | 精工厂免费视频观看 | 专干老妇熟女6o80在线播放 | 日本乱交在线观看 | 五月婷婷婷婷婷婷 | 91人人妻人人澡人人爽人人精品99 | 西西人体大胆4444w w |