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What are the advantages and the disadvantages of a hydrogen fuel cell car over a hybrid car?
Advantages are very low emissions. Disadvantage is rarity of hydrogen fuel stations.
What are 3 advantages of tidal energy?
Does not require fuel to run. 2) Environmental friendly and does not produce any greenhouse gases. 3) Maintenance is low on cost.
What is the obstacle to using hydrogen as a fuel?
One major obstacle to using hydrogen as a fuel is the high cost of production. Currently, most hydrogen is produced from natural gas through a process called steam methane reforming, which generates carbon dioxide emissions. Additionally, storing and transporting hydrogen can be challenging due to its low energy density and the need for specialized infrastructure.
What is a disadvantage of a hydrogen fuel cell?
A key disadvantage of hydrogen fuel cells is the cost associated with hydrogen production, storage, and distribution. Currently, most hydrogen is produced from natural gas through a process that emits carbon dioxide, negating some of the environmental benefits. Additionally, the infrastructure for hydrogen refueling is limited compared to conventional fuel stations, making it less convenient for widespread adoption. Finally, hydrogen's low energy density by volume requires high-pressure storage, which can pose safety concerns.
Whats stopping the general use of hydrogen in cars?
Currently, hydrogen fuel cells are costly to produce and fragile.Freezing conditions are a major consideration because fuel cells produce water and utilize moist air with varying water content. Most fuel cell designs are fragile and cannot survive in such environments at startup but since heat is a byproduct of the fuel cell process, the major concern is startup capability. Although service life is coupled to cost, fuel cells have to be compared to existing machines with a service life in excess of 5000 hours Hydrogen has a very low volumetric energy density at ambient conditions, equal to about one-third that of methane. Even when the fuel is stored as a liquid in a cryogenic tank or in a pressurized tank, the volumetric energy density (megajoules per liter) is small relative to that of gasoline.In order to distribute hydrogen to cars, the current gasoline fueling system would need to be replaced, or at least significantly supplemented with hydrogen fuel stations. information from wikipedia
Why is coal cheap?
Coal is cheap because it is a widely available fossil fuel that is extracted through mining operations. The abundance of coal reserves, combined with efficient extraction methods, contributes to its low cost compared to other energy sources. Additionally, coal is a relatively low-cost fuel to both produce and transport.
Why are wind mills built?
In essence to produce clean energy at low cost
What are the disadvantages about hydrogen?
Hydrogen is very flammable and can easily explode. Look back the Hindenburg blimp that used hydrogen. Hydrogen burns very cleanly leaving just water vapor of a byproduct. Using Hydrogen as a fuel for cars sounds great except that you need to make it by splitting water into Hydrogen and Oxygen. That uses up as much energy as the burning of Hydrogen releases. In use as a fuel for cars, you can imagine the explosion when a hydrogen tank bursts and ignites.
How is hydrogen stored in a car?
Hydrogen is stored in cars primarily in high-pressure tanks made of lightweight, durable materials like carbon fiber-reinforced composites. These tanks can withstand pressures of up to 700 bar (10,000 psi) to ensure a sufficient supply of hydrogen for fuel cell operation. Additionally, hydrogen can also be stored in a cryogenic liquid state at very low temperatures, though this method is less common in vehicles. The stored hydrogen is then fed into the fuel cell, where it reacts with oxygen to produce electricity, powering the vehicle.
Why is a hydrogen fuel a bad thing?
Hydrogen fuel is not inherently bad, but there are challenges associated with its widespread adoption such as high production costs, lack of infrastructure for distribution, and the carbon footprint of current production methods. Additionally, storing and transporting hydrogen can be difficult due to its low energy density.
Do stars expand in size?
Stars expand in size to become red giants, when they start running low on Hydrogen fuel.
What energy source uses a fuel cell?
A fuel cell primarily uses hydrogen as its energy source, which reacts with oxygen from the air to produce electricity, water, and heat. This electrochemical process is efficient and produces low emissions, making fuel cells an attractive option for clean energy applications, including transportation and stationary power generation. Some fuel cells can also utilize other fuels, such as methanol or natural gas, through reforming processes. Overall, hydrogen fuel cells are the most common type used for energy generation.
