Admin Table of Contents
- 1 How much energy does it take to produce 1kg of hydrogen?
- 2 How much energy does hydrogen release?
- 3 What is the most efficient way to convert hydrogen to electricity?
- 4 How far can a car travel on 1 kg of hydrogen?
- 5 How much energy does it take to compress hydrogen?
- 6 How is the energy density of hydrogen determined?
How much energy does it take to produce 1kg of hydrogen?
Producing 1 kg of hydrogen requires about 5 kWh of electricity for process heat.
How much energy does hydrogen release?
The energy in 2.2 pounds (1 kilogram) of hydrogen gas is about the same as the energy in 1 gallon (6.2 pounds, 2.8 kilograms) of gasoline. Because hydrogen has a low volumetric energy density, it is stored onboard a vehicle as a compressed gas to achieve the driving range of conventional vehicles.
How do you convert hydrogen into electricity?
The conversion of hydrogen back into electricity can be classically done by using internal combustion engines (ICE), gas turbines, or in the very large scale combined cycle power plants. Efficiencies range from approximately 30% for gas turbines and up to 60% for large scale combined cycle plants.
How much does it cost to produce 1kg of hydrogen?
Today, renewable hydrogen from electrolysis costs about $6/kilogram (kg).
What is the most efficient way to convert hydrogen to electricity?
Generating Hydrogen by electrolysis from wind farm electricity is now the cheapest way of producing the gas….Fuel Cells.
| Fuel Cells | Chemical Energy ⇒ Electrical Energy |
|---|---|
| Steam Turbine Generators | Chemical Energy ⇒ Heat ⇒ Mechanical Energy ⇒ Electrical Energy |
How far can a car travel on 1 kg of hydrogen?
In any of the latest fuel cell cars, 1 kg of hydrogen will let you drive 97 – 100 km.
How much energy can be extracted from a kilogram of hydrogen?
Hydrogen has an energy density of 39 kWh/kg, which means that 1 kg of hydrogen contains 130 times more energy than 1kg of batteries. So lots of energy can be stored with hydrogen in only a small volume.
How much energy is released when hydrogen and oxygen are ignited?
When ignited, the gas mixture converts to water vapor and releases energy, which sustains the reaction: 241.8 kJ of energy (LHV) for every mole of H2 burned.” A mole of hydrogen weighs 2 grams. So, this is a LHV (lower heating value) of 120.9 kJ/gram of hydrogen when heat of vaporization is subtracted.
How much energy does it take to compress hydrogen?
The theoretical energy to compress hydrogen isothermally from 20 bar to 350 bar (5,000 psi or ~35 MPa) is 1.05 kWh/kg H 2 and only 1.36 kWh/kg H 2 for 700 bar (10,000 psi or ~ 70 MPa). Greater compression energies are required to fill vehicles in practice due to compressor inefficiencies and heating during fast fills.
How is the energy density of hydrogen determined?
Energy Density of Hydrogen. Hydrogen has one of the highest energy density values per mass. Its energy density is between 120 and 142 MJ/kg. This means that for every 1 kg of mass of hydrogen, it has an energy value of 120-142 MJ. It is highly flammable, needing only a small amount of energy to ignite and burn. Hydrogen burns cleanly.