Hydrogen Calculations: Difference between revisions
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*6 cu m or 200 scf in a high pressure welding cylinder - [http://www.hionsolar.com/solarhydrogen.pdf]. If hydrogen has about 250 BTU per cu ft, then a 200 scf tank has about | *6 cu m or 200 scf in a high pressure welding cylinder - [http://www.hionsolar.com/solarhydrogen.pdf]. 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. | ||
*Production rate - [http://www.hionsolar.com/solarhydrogen.pdf] - each Spicer electrolyzer cell produces 1/2 cu ft per hr with 40A x 24V. Under 1 kW of input power. 12 cell system of Walt Pyle had 20A x 24v. The rated production rate of a 12 cell system appears to be 6 cubic feet per hour (170 liter/hour). | |||
*Compare to 600 liter/hr at $1740 on Ebay for a common-duct electrolyzer - [http://www.ebay.com/itm/LCD-Oxy-Hydrogen-Generator-Water-Welder-Acrylic-Flame-Polisher-Torch-Welder-600L/281186408285?_trksid=p2141725.c100338.m3726&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20150313114020%26meid%3De5ad6bb241614b66bfc35add3453eb3d%26pid%3D100338%26rk%3D5%26rkt%3D12%26sd%3D281561540006] | |||
*p. 66 of [[The Solar Hydrgen Chronicles]] indicate $4k cost without PV or storage tanks, which would already be present on a solar homestead. If propane costs are $22 per bottle or $240 per year per house - this has a 17 year payback time. Cost optimization half the cost, and further optimization could probably drop the cost to 25%. It's worthwhile to get real data from a build to see what optimizations can be made. | |||
=Links= | =Links= | ||
*[[Walt Pyle]] | *[[Walt Pyle]] | ||
*[[Solar Hydrogen Calculations]]. | |||
Latest revision as of 18:48, 26 May 2019
- 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.
- Production rate - [2] - each Spicer electrolyzer cell produces 1/2 cu ft per hr with 40A x 24V. Under 1 kW of input power. 12 cell system of Walt Pyle had 20A x 24v. The rated production rate of a 12 cell system appears to be 6 cubic feet per hour (170 liter/hour).
- Compare to 600 liter/hr at $1740 on Ebay for a common-duct electrolyzer - [3]
- p. 66 of The Solar Hydrgen Chronicles indicate $4k cost without PV or storage tanks, which would already be present on a solar homestead. If propane costs are $22 per bottle or $240 per year per house - this has a 17 year payback time. Cost optimization half the cost, and further optimization could probably drop the cost to 25%. It's worthwhile to get real data from a build to see what optimizations can be made.