Ignition energy storage

What is the minimum ignition energy of hydrogen?

Primarily, hydrogen has a lower minimum ignition energy (MIE) compared to other fuels. MIE of hydrogen in air is approximately 17 μJ, whereas other flammable gases such as methane, ethane, and propane have MIE values ranging from 260 to 300 μJ .

Why is hydrogen storage important?

Hydrogen storage, as an indispensable part of the hydrogen energy industry, plays a crucial role. Therefore, safe and economical hydrogen storage technology is key to propelling the development of the hydrogen energy industry. There are varieties of hydrogen storage technologies, each with its unique characteristics.

What happens when hydrogen is ignited with a low ignition energy?

Typically, when hydrogen is ignited with a low ignition energy, laminar combustion first occurs. Afterwards, because of the inherent instability of the flame, interaction of various pressure waves, etc., the flame undergoes turbulent combustion, which increases the flame speed, eventually shifting to detonation.

Why do spark ignition engines use hydrogen?

Reducing the air–fuel ratio decreases the combustion temperature and NOx emissions. Spark ignition engines can be fueled with hydrogen without requiring major modifications. A higher hydrogen burning velocity improves combustion and allows for higher brake thermal efficiency.

Is hydrogen a good alternative to energy storage?

Hydrogen, with its high energy density, provides a promising alternative [, , , , , , , ]. Excess energy, generated during periods of low demand, can be used to produce hydrogen, enabling efficient and scalable energy storage [, , , ].

What are the engine performance challenges for spark ignition hydrogen concepts?

The greatest engine performance challenges for spark ignition hydrogen concepts are power density, fuel efficiency, and transient performance. For low-pressure hydrogen combustion concepts, moderate hydrogen injection pressure is required and there is no need for an additional compression system.