Hydrogen Storage: Difference between revisions
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=Cryogenic Storage= | =Cryogenic Liquid Storage= | ||
*Ultra High Density | *Ultra High Density | ||
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*Energy.gov state of art technology report - [https://energy.gov/eere/fuelcells/fuel-cell-technologies-office-accomplishments-and-progress] | *Energy.gov state of art technology report - [https://energy.gov/eere/fuelcells/fuel-cell-technologies-office-accomplishments-and-progress] | ||
*In an open source economy, these costs make hydrogen storage feasible at today's prices - deployable via community-supported manufacturing. | *In an open source economy, these costs make hydrogen storage feasible at today's prices - deployable via community-supported manufacturing. | ||
*[https://energy.gov/eere/fuelcells/physical-hydrogen-storage Another USA ".gov" site on hydrogen storage] | |||
Revision as of 23:54, 27 January 2018
Basics
- Although hydrogen if a good fuel, its storage can be complicated. Thus this page was made
High Pressure Hydrogen
- Electrolyzers can produce hydrogen at pressure, so a compressor is not needed.
- A high pressure steel tank is about $500 - [1]
- The simplest tank that can be used is a steel tank for up to 200 bar. This appears to be the lowest cost option. [2]
- Standard tanks are 55" high and 9" wide. with 45x9 inch usable size. 50L? - about 12 gallon, yes, 50L. If 200 atmospheres, that is 2400 gallon equivalent. 4 of these store 10000 gallons - 1.7 gallon gasoline equivalent - but the efficiency of a hydrogen engine is 2x that of gasoline, so it's effectively 3.4 gallons by comparison. That is acceptable for a microcar, though cylinder weight is 143 each or 572 lb for the tanks themselves - a significant tradeoff for a 750 lb microcar. In the first iteration, a microcar could use 1 of these as a proof of concept for a 100 mile designed range at 750 lb of weight.
Calculations
- Cost targets - https://energy.gov/eere/fuelcells/hydrogen-storage
- 1kWhr=3.6MJ. 1 kG of hydrogen is 142MJ/kg
- Cost for car tanks target - $15/kWhr - or about 40x for 1 kG - $600/kg. (above reference)
- Cost or stationary storage goal - $1000/kg - [3]
- Compare to propane tank, 1000 gal, 100 PSI -
Storage Tank Suppliers
- 700 bar, 20 gallon - [4]. RFQ submitted 1/27/18
- In-ground storage, 2200 PSI - 14"x40' - [5]
- Low, medium, and high pressure storage options - [6]
- Pictures of storage tanks - [7]
Cryogenic Liquid Storage
- Ultra High Density
- Can be done using a Delwar, a pure hydrogen gas source, and a cheap cryocooler
- A diy cryocooler could possibly be made to reduce costs further
Storage as a Synthesized Fuel
- Convert to Methane by the Sabatier Reaction
- That can be compressed/liquified as is or it could be further converted into other fuels:
- Methanol can be made from methane via the following process Listed Here
- Dimethyl Ether can be made from Methanol This Details How
- Dimethyl Ether Can be Catalytically Converted to Hydrocarbons such as Gasoline This Details How
- Hydrogen + Carbon Monoxide can be directly converted to hydrocarbons via the Fischer Tropsch Process
See Also
- Gas_Storage_in_PVC_Pipe - 10000 gal STP is 1.7 kg of hydrogen.
Useful Links
- This reports the cost of tanks at low-thousands scale for a car - [8]
- Energy.gov state of art technology report - [9]
- In an open source economy, these costs make hydrogen storage feasible at today's prices - deployable via community-supported manufacturing.
- Another USA ".gov" site on hydrogen storage