I found this site about a solar hydrogen and fuel cell setup for domestic use in Australia. It has a full description and costs. Some of the efficiencies are lower than one might expect and it doesn’t eliminate batteries completely. As this topic comes up from time to time I thought others might like to read through this real case study.

http://www.siei.org/mainpage.html

Some of the efficiencies are lower than one might expect
—

I dunno … some of my expectations are very low

Bump.

Bump with link to actual, available electrolyser in an actual installation in Australia.

http://www.siei.org/electrolyzers.html

morrie said:

Bump with link to actual, available electrolyser in an actual installation in Australia.

http://www.siei.org/electrolyzers.html

Complete with the costs of the system and the operational problems.

morrie said:

Bump with link to actual, available electrolyser in an actual installation in Australia.

http://www.siei.org/electrolyzers.html

When did Australia take control of these Islands off Washington State?

sibeen said:

morrie said:

Bump with link to actual, available electrolyser in an actual installation in Australia.

http://www.siei.org/electrolyzers.html

When did Australia take control of these Islands off Washington State?

It was quite recent.

morrie said:

morrie said:

Bump with link to actual, available electrolyser in an actual installation in Australia.

http://www.siei.org/electrolyzers.html

Complete with the costs of the system and the operational problems.

The maximum figure from morrie’s paper is 40% and the minimum figure from dv’s paper was 60%, so maybe my guess of 50% was not so bad.

On solid polymer jobbies:

http://oldsites.dekon.com.tr/ihec2005/abstract/ORALPDF/DESIGN%20AND%20OPERATING.pdf
Design and Operating Performances of a 5 MW PEM Water Electrolyzer for High Pressure Production of Pure Hydrogen

“Using the SPE technology it is known that water electrolysis can be achieved with high energetic efficiencies: > 85 % at 1 Amp/cm^2 are commonly obtained at the lab scale”

“morrie said:

Bump with link”

Bump?
Your post talking about your earlier post was your first post in this thread…

dv said:

On solid polymer jobbies:

http://oldsites.dekon.com.tr/ihec2005/abstract/ORALPDF/DESIGN%20AND%20OPERATING.pdf
Design and Operating Performances of a 5 MW PEM Water Electrolyzer for High Pressure Production of Pure Hydrogen

“Using the SPE technology it is known that water electrolysis can be achieved with high energetic efficiencies: > 85 % at 1 Amp/cm^2 are commonly obtained at the lab scale”

at the
cost of a few mg of noble metal (Pt, Ir) per cm2, and quite interesting performances are still
obtained at the 500 Nliter H2/hour prototype scale. But the cost of noble metals which may
account for up to 40 % of the electrolyzer cost still postpone large-scale public developments

Depends how you define agriculture I guess. Vast tracts of land are used for grazing sheep and cattle at low densities. not sure if that counts or not.

morrie said:

sibeen said:

morrie said:

Bump with link to actual, available electrolyser in an actual installation in Australia.

http://www.siei.org/electrolyzers.html

When did Australia take control of these Islands off Washington State?

It was quite recent.

Morrie is correct.

Google maps show that this island is just off the coast of Sydney.

Funny they spelt it wrong though.

dv said:

“morrie said:

Bump with link”

Bump?
Your post talking about your earlier post was your first post in this thread…

I did however bump the thread early on in the discussion. I set up the initial thread exactly because this discussion comes up regularly and I thought it good to have some actual operational data to hand. I have a personal interest in this as I run on solar.

party_pants said:

Depends how you define agriculture I guess. Vast tracts of land are used for grazing sheep and cattle at low densities. not sure if that counts or not.

I thought that there were vast tracts that were not even used for that, but I haven’t actually visited them so I could be wrong.

But in the context of the thread we are concerned about land that has sufficient productive value to make it a significant cost in developing low efficiency solar power.

The Rev Dodgson said:

party_pants said:

Depends how you define agriculture I guess. Vast tracts of land are used for grazing sheep and cattle at low densities. not sure if that counts or not.

I thought that there were vast tracts that were not even used for that, but I haven’t actually visited them so I could be wrong.

But in the context of the thread we are concerned about land that has sufficient productive value to make it a significant cost in developing low efficiency solar power.

.

I’d be quite happy if you replaced your original “no agricultural value” statement with “low agricultural value”.

In any case, it still comes down to land-use economic value. If a farmer could invest in and harvest solar hydrogen and make more money off that than cattle, it’d likely occur eventually.