Hydrogen Calculations
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- 4 Atmospheres in a propane tank -
- 6 cu m or 200 scf in a high pressure welding cylinder - [1]. If hydrogen has about 250 BTU per cu ft, then a 200 scf tank has about 3 kW hr of electrical energy when burned in a small gas engine to produce electricity. This is about the same energy as a 250 gallon propane tank.