Analysis of the advantages of fuel cells

1 In addition to the use of gasoline reforming to produce hydrogen, other (methanol, hydrocarbon, etc.) fuels are basically free of petroleum fuel. From the engine to the overall efficiency of the drive system to the wheel, the internal combustion engine car is about 11%, the actual efficiency of the FCEV with hydrogen as fuel is 50% to 70%, using methanol as fuel, after reforming to produce hydrogen FCEV, the actual efficiency reaches 34%. The actual efficiency of FCEV is much higher than that of internal combustion engines.

2 The internal combustion engine has the highest efficiency near the rated power, while operating under partial power output conditions, the efficiency is rapidly reduced. The efficiency of the fuel cell at rated power can reach 60%, while operating under partial power output conditions, the efficiency can reach 70%, and the operating efficiency can reach 50% to 55% under the condition of overload power output. High efficiency varies widely with power, and it operates at low power with high efficiency, making it ideal for automotive power performance. 3 The internal combustion engine has low overload capacity and is easy to “extinguish” during overload operation. The short-term overload capability of the fuel cell can reach 200% of the rated power. Ideal for automotive performance in acceleration and hill climbing.

Based on the above points, the energy saving of the fuel cell far exceeds that of the internal combustion engine, and the stability and reliability are higher than that of the internal combustion engine.

(2) Emissions reach zero pollution

The harmful gas in the exhaust gas emitted by the internal combustion engine is a fatal shortcoming of the internal combustion engine. Although various technical measures inside and outside the aircraft are adopted, it can only achieve the level of "low pollution" due to the internal combustion engine. The number of cars is huge, and even “low pollution” has a huge impact on the global environment. The fuel cell engine that uses hydrogen as a fuel mainly produces water and CO2, which is classified as “zero pollution”. Fuel cell engines using hydrocarbons as fuels mainly produce water and CO2, and CO and the like are "ultra-low pollution". Fuel cell engines are an ideal power device because of the requirements for global environmental protection and the pursuit of new energy sources, and it is possible to gradually replace petroleum as the main energy source for vehicles.

(3) Vehicle performance is close to that of internal combustion engine vehicles

The specific power of the internal combustion engine is about 300 W/kg. At present, the specific power of the fuel cell body is 700 W/kg, and the power density is 1000 W/L. If the fuel cell reformer, purifier and accessory are included, the specific power is 300-350 W/kg and the power density is 280 W/L. In terms of energy, the fuel cell is close to the internal combustion engine, so the power performance can reach the level of the internal combustion engine.

(4) Simple structure and stable operation

1 The energy conversion of the fuel cell engine is completed under static conditions, the structural parts are simple in construction, and the machining accuracy requirements are much lower than that of the internal combustion engine. In particular, the proton exchange membrane fuel cell has high energy conversion efficiency, can be started and operated under low temperature conditions, and has low requirements on the heat resistance of the structural member. Most of the structural parts are plate-shaped and pipe-shaped, there are no moving parts and various friction pairs, and there is no failure caused by wear of parts, and maintenance and maintenance are convenient.

2 The fuel cell engine is composed of a plurality of single fuel cells connected in series, and can be configured into a series of fuel cell engine sets of various specifications, which can be assembled on different uses and different types of vehicles. The overall arrangement can be flexibly and maneuvered on the vehicle according to the specific conditions of the axle load distribution of the vehicle and the utilization of the effective space of the vehicle.

3 During the operation of the fuel cell engine, the noise is small, the vibration is small, the heat dissipation system is much simpler than the internal combustion engine, and the thermal management system is also simpler. The output does not require purification and muffling, and the entire fuel cell system is easy to implement automated system management.

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