设计过压力容器不？知道压力容器多危险不？
Natural Gas Cars Pros my结论，电车是必然，天然气车多余
Pollution Control: This is one of the biggest issues gripping the world
today. The effects of air pollution are of great concern to modern
scientists. If the pollution is not controlled now, we may never be able to
revert the environmental damage we have caused. Natural gas cars are far
less polluting compared to gasoline cars.
Tax Incentives: Not just in America, governments all around the world have
declared tax incentives to consumers using natural gas cars. Even though
this is mainly to cap air pollution, the resulting low prices are a major
benefit.
Abundance of Natural Gas: Natural gas has not been used as extensively as
gasoline. Hence, there are vast amounts of natural gas deposits still
available. So, we can presume that we may not see complete depletion of
natural gas at least in our lifetime. As far as fuel is concerned, there is
relatively greater assurance of the availability.
Natural Gas Cars Conversion Kit: If you cannot afford to purchase a new
natural gas car, there is a conversion kit available, which will allow you
to hybridize your car. After installation of this kit, you will be able to
use a multi-fueled hybrid car, i.e. a gasoline and gas car.
Cost of Maintenance: When you buy a car or a truck you are obviously making
a long term investment. Cost of preventive maintenance of natural gas cars
and trucks is very low in a long term perspective.
High Compression Ratio: Natural gas engines have a high compression ratio.
High compression ratio means that the fuel is almost completely burnt,
leaving behind very few by-products, which is beneficial to the environment.
Natural Gas Cars Cons
Storage Tank : Any gas needs a container for storage or a storage tank. The
design implementation of a natural gas car does not allow engineers to have
a small storage tank, and a big storage tank is not very conducive. Car
safety is also a concern in gas storage.
Slow Performance: Natural gas cars are not famous for their high speeds. The
horse power of similarly calibrated engines for gasoline and natural gas
are not at all comparable. The low horse power basically results in the slow
performance of natural gas cars.
Less Performance: By performance, I mean the mileage of the car in relation
to the amount of gas used. One full tank of gasoline gives more output than
one full tank of natural gas.
CNG Station Availability: There are very few CNG stations available.
Therefore, your options become limited. If you run out of natural gas,
chances are that the nearest gas station will be at least ten miles away. In
this scenario, you can either carry a big tank in your car, or tow your car
to the CNG station.
Purchase Cost: Since natural gas cars are not as popular as gasoline cars,
manufactures are finding it difficult to drive down the cost. High purchase
cost is one thing that you have to deal with while purchasing natural gas
cars.
Low Volumetric Efficiency: This is the measure of the charge that is
delivered into the cylinders. Simply put, low volumetric efficiency
contributes to low efficiency in the performance of the car.
