Hydrogen, like electricity, is an energy carrier that must be produced from another substance. … However, hydrogen is useful as an energy source/fuel because it has a high energy content per unit of weight, which is why it is used as a rocket fuel and in fuel cells to produce electricity on some spacecraft.
Is hydrogen a good source of energy?
Hydrogen is an energy carrier, not an energy source and can deliver or store a tremendous amount of energy. Hydrogen can be used in fuel cells to generate electricity, or power and heat.
What are the advantages of hydrogen energy?
Hydrogen is a Clean and Flexible Energy Source to support Zero-Carbon Energy Strategies. Hydrogen fuel cells provide an inherently clean source of energy, with no adverse environmental impact during operation as the byproducts are simply heat and water.
How is hydrogen used as an energy source?
Hydrogen fuel cells produce electricity by combining hydrogen and oxygen atoms. The hydrogen reacts with oxygen across an electrochemical cell similar to that of a battery to produce electricity, water, and small amounts of heat. Many different types of fuel cells are available for a wide range of applications.
Why is hydrogen energy considered as future energy resource?
Hydrogen is the fuel of the future. … Hydrogen is an energy carrier that can be used in internal combustion engines or fuel cells producing virtually no greenhouse gas emissions when combusted with oxygen. The only significant emission is water vapor.
Why are hydrogen engines a bad idea?
Hydrogen fuel cells have bad theoretical and practical efficiency. Hydrogen storage is inefficient, energetically, volumetrically and with respect to weight. … It has a horrible well-to-wheel efficiency as a result. Easy ways to get large quantities of hydrogen are not ‘cleaner’ than gasoline.
Why is hydrogen not used as fuel?
Hydrogen has the highest calorific value so it can be considered as the best fuel but it is highly inflammable so it is diificult to store, transport and handle so it is used as a fuel only where it is absolutely necessary.
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.
Why is hydrogen so important?
The most important function of hydrogen in the human body is to keep you hydrated. Water is made up of hydrogen and oxygen and is absorbed by the cells of the body. Therefore, it is a crucial element which is used not in our body but also as a fuel, in military weapons etc.
Is hydrogen expensive to produce?
The cost of hydrogen production is an important issue. Hydrogen produced by steam reformation costs approximately three times the cost of natural gas per unit of energy produced. This means that if natural gas costs $6/million BTU, then hydrogen will be $18/million BTU.
Why is it difficult to use hydrogen as a source of energy?
Answer : (i) When hydrogen gas is lighted, it burns with an explosion which is very unsafe. (ii) It is very expensive to produce hydrogen gas by the electrolysis of water because it requires a lot of electricity. … Hence it is difficult to use hydrogen as a source of energy, though it has high calorific value.
What is an interesting fact about hydrogen?
Interesting Facts about Hydrogen
Scientists estimate that Hydrogen makes up over 90 percent of all the atoms in the universe. It is the only element that can exist without neutrons. Hydrogen becomes a liquid at very low temperature and high pressure. Under extremely high pressure it can become a liquid metal.