Why Fuel Cells? Fuel cells directly convert the chemical energy in hydrogen to electricity, with
pure water and potentially useful heat
as the only byproducts. Hydrogen-powered fuel cells are not only pollution-free, but they can also have more than two times the efficien- cy of traditional combustion technologies.
What is the byproduct of fuel cell Mcq?
Fuel Cell – a device that uses hydrogen (or hydrogen-rich fuel) and oxygen to create electricity by an electrochemical process. If pure hydrogen is used as a fuel, fuel cells emit only
heat and water
as byproducts.
What are the 2 byproducts of a fuel cell?
In a fuel cell, hydrogen (H
2
) gas from the vehicle's fuel tank combines with oxygen (O
2
) from the air to generate electricity with only
water and heat
as byproducts of the process.
Why are fuel cells Bad?
Hydrogen fuel cells have
bad theoretical and practical efficiency
. Hydrogen storage is inefficient, energetically, volumetrically and with respect to weight. … Efficient HFCs have very slow response times, meaning you again need additional systems to store energy for accelerating.
How heavy is a fuel cell?
Mirai hydrogen fuel cell: new lithium-ion battery
Weight has been reduced from 46.9 to
44.6kg
and output has improved from 25.5kW x 10 seconds to 31.5kW x 10 seconds.
Do hydrogen fuel cells wear out?
Much like a battery, a fuel cell produces electricity through an electrochemical reaction, which generates electricity without any combustion. Unlike batteries,
fuel cells don't wear out
and continuously provide electricity as long as there's a constant source of fuel and oxygen.
Are hydrogen fuel cells bad for the environment?
In fact, it's
essentially pollution-free
. A hydrogen fuel cell in a car produces zero emissions; the only substances released through its tailpipe are water vapor and heat. … Ironically, the carbon dioxide released in the process of producing hydrogen from fossil fuels cancels out any benefits to the environment.
Are fuel cells renewable?
It can be extracted from water using electrolysis, using power from
renewable solar
or wind, nuclear energy, or fossil energy. It can be extracted from renewable biomass or coal using high temperature gasification. … Today, most hydrogen is derived from fossil natural gas, emitting fossil carbon dioxide as a by-product.
What are the problems with hydrogen fuel cells?
The two prime dangers from fuel cell and hydrogen-powered vehicles are the
danger of electrical shock and the flammability of the fuel
. Fuel cells power vehicles by electro-chemically combining hydrogen gas (H2) and oxygen (O2) from the surrounding air into water (H20) and electrical energy.
Are hydrogen cars better than electric?
The main advantage of hydrogen cars is that
they produce no emissions at the tailpipe
– just water. This benefit is the same as with a normal electric car, and puts both at the forefront of emission-cutting tech in the automotive world.
Can you drink the water from a hydrogen fuel cell?
Still,
the company doesn't recommend drinking it
. That's because the water is created by sucking in oxygen from the surrounding air and bonding it to hydrogen from the fuel tank. … But the water is slightly acidic, with a pH around 5 or 6. That's less acidic than acid rain and even beer.
Are fuel cells the future?
In the future,
fuel cells could power our cars
, with hydrogen replacing the petroleum fuel that is used in most vehicles today. … Unlike a typical battery, which eventually goes dead, a fuel cell continues to produce energy as long as fuel and oxidant are supplied.
How much does a fuel cell cost?
In contrast to these battery costs, operators reported an average cost of $33,000 for a fuel cell system for Class I and II lifts (typically 8–10 kW in size), with costs ranging from
$32,000 to $34,000
.
How long do fuel cells last?
The fuel cell stacks are designed to last the lifetime of the vehicle,
about 150,000–200,000 miles
. At the end of its lifespan, the fuel cell will be disassembled and the materials recycled, similar to what happens with vehicle components today.
What is a disadvantage of fuel cells?
Disadvantages of using fuel cells in cars
fuel cells and
electric motors are less durable than petrol engines and diesel engines
, so they are not so long-lasting. fuel cells are very expensive. … some methods of producing the hydrogen fuel release carbon dioxide and other pollutants into the atmosphere.
Does Tesla use hydrogen fuel cells?
Battery electric vehicles, or BEVs, are the electric vehicles that most of us are familiar with today, like Teslas. …
Fuel-cell vehicles don't require charging at all
. The hydrogen tank is refilled at a hydrogen station in less than five minutes, just like your typical gas station today.
