Cheaper than Green Hydrogen: Green Hydrogen is a combustible gas that is electrolyzed from water. Hydrogen uses the air from the atmosphere to burn. One of the paths to near-total decarbonization is electrifying the whole energy system and using clean renewable power. But electrifying the entire energy system would be difficult, or at least much more expensive than combining renewable generation with low-carbon fuels. Green hydrogen is one of several potential low-carbon fuels that could take the place of today’s fossil hydrocarbons.
HHO Brown’s Gas
Brown’s Gas is a combustible gas that is electrolyzed from water. Brown’s Gas does not use the air from the atmosphere to burn.
YBG HHO of Australia produce Brown’s Gas electrolyzers that have an electrical consumption of 3 kWh per 1,000 liters (Nm3cubic meter) of oxy-hydrogen gas produced.
NEL Hydrogen of Norway claim to be produce the lowest cost electrolyzers for Green Hydrogen with electrical consumption in the range of 3.8-4.4 kWh per 1,000 liters (Nm3 cubic meter) of hydrogen gas produced.
HHO Brown’s Gas is Cheaper than Green Hydrogen
Brown’s Gas electrolyzers are modular. A series of five 20000 L/hr machines produces 2,400 Nm3 cubic meters of zero emissions combustible gas daily.
Differentiation Brown’s Gas and Green Hydrogen
In the future when solid storage mediums are available to store combustible gases, Brown’s Gas will be on par with Green Hydrogen as a storage medium for electricity generated from renewables.
The future of Hydrogen for electrical generation depends on the development of solid storage mediums.
The use of Green Hydrogen for electrical power generation is not sensible from an economic point of view. Electricity is consumed to electrolyze water, and then the Hydrogen is stored (currently in tanks) and later converted back to electricity. It is a net loss of electricity.
In contrast Brown’s Gas is produced on-demand and used on-site.
So, Why is Green Hydrogen Such a Big Deal?
Theoretically, there are lots of useful things you can do with green hydrogen.
- You can add it to natural gas and burn it in thermal power or district heating plants, or to directly power fuel cells in cars and ships, for example.
- To start with, you can use it simply to replace the industrial hydrogen that gets made every year from natural gas and which amounts to around 10 million metric tons in the U.S. alone.
- The main problem with satisfying all these potential markets is in getting green hydrogen to where it is needed. Storing and transporting the highly flammable gas is not easy; it takes up a lot of space and has a habit of making steel pipes and welds brittle and prone to failure.
- Because of this, the bulk transport of hydrogen will require dedicated pipelines, which would be costly to build, pressurizing the gas, or cooling it to a liquid.
- Those last two processes are energy-intensive and would further dent green hydrogen’s already underwhelming round-trip efficiency.
Summary so far
Green Hydrogen needs transportation and storage, including safety protocols for the highly flammable gas. This involves building pipelines and pressurizing or liquifying the gas which makes it even more expensive.
In comparison, HHO Brown’s Gas is produced on-demand and used on-site.
YBG claims its HHO Brown’s Gas electrolyzers are a fraction of the cost of NEL’s.
Green hydrogen is still expensive to produce today. In a report published last year (using data from 2018), the International Energy Agency (IEA) put the cost of green hydrogen at $3 to $7.50 per kilo, compared to $0.90 to $3.20 for production using steam methane reformation.Source: So, What Exactly Is Green Hydrogen? | Greentech Media
Based on hydrogen weighing 90 grams per Nm3 it takes 11.111 Nm3 of hydrogen to weigh one kilogram. So the cost of producing hydrogen classified as Brown, Blue and Green Hydrogen is quoted by the IEA as anywhere between $0.90 and $7.50 per kilo.
One Nm3 of HHO Brown’s Gas is comprised of 33.333% oxygen and 66.666% hydrogen and weighs 536 grams per Nm3 (as oxygen weighs 1.429 kg/Nm3 at standard atmospheric pressure).
Based on HHO Brown’s Gas weighing 536 grams per Nm3 it takes 1.866 Nm3 of HHO Brown’s Gas to weigh one kilogram, which is the weight of one liter of water. So the cost of producing one kilogram (1.866 Nm3) of HHO Brown’s Gas at 3 kWh @ $0.15/kWh x 1.866 is $0.84 which is cheaper than any IEA quoted cost of hydrogen production per Nm3.
Brown’s Gas could be used to increase the efficiency of fuel cells upwards from their current low levels, especially by providing an inexpensive source of hydrogen. This could prove to be very interesting for variable power input hydroelectric plants and wind-energy farms.