Revision as of 19:49, 18 November 2020

99.9% purity, 500ml/min, 4 atmosphere. [1].
At 4 atmospheres, can fill a 1000 gallon propane tank - in 4 days. At 1 atmosphere - one day!
$3500 of generators (same as above but at $700/unit) gets us 1.5 kWhr of usable storage with a generator. That is the same cost as a 20kW new battery bank - which can last 10 years in off-grid apps. We are a factor of 13x higher capital cost than batteries at this stage - which can be solved only by reducing cost of hydrogen generation equipment.
Ideal conditions - 40kWhr to generate 1 kg of hydrogen - [2]
Look at basic capital cost from last link:

For sensemaking - $1-5k capital costs per kW electrolyzer. A 1 kW electrolyzer - for reference, the 500 ml/hr generator in link above requires 180W. If we take the electrolyzer above at $1k for 500 ml/hr - we need about 5 of those for 1kW of electrolyzer - or about $5k. But it takes about 24x as much electrolyzer to generate 10kG/day (or 10 gallons per day). Each 1000 gallon propane tank can store

@@ Line 7: / Line 7: @@
 [[File:capitalhydrogen.png]]
-*'''For sensemaking - $1-5k capital costs per kW electrolyzer. A 1 kW electrolyzer - for reference, the 500 ml/hr generator in link above requires 180W.''' If we take the electrolyzer above at $1k for 500 ml/hr - we need about 24 of those to equal the 10kg/day level in the paper. So that is only $24k in capital costs, or about $17k if we use cheaper electrolyzers at $700 a pop (see [[Solar Hydrogen Production]]).
+*'''For sensemaking - $1-5k capital costs per kW electrolyzer. A 1 kW electrolyzer - for reference, the 500 ml/hr generator in link above requires 180W.''' If we take the electrolyzer above at $1k for 500 ml/hr - we need about 5 of those for 1kW of electrolyzer - or about $5k. But it takes about 24x as much electrolyzer to generate 10kG/day (or 10 gallons per day). Each 1000 gallon propane tank can store
 =Links=
 *[[Solar Hydrogen Production]]
 *[[Hydrogen Compression]]

Hydrogen Gas Generator: Difference between revisions