Hybrid pv and hydrogen white paper

[jbatx]

Stefan Krauter just published a new paper on a hybrid pv and hydrogen fuel cell model for reducing grid interaction, etc. Thought I'd post it here. It's in Creative Commons.

 

[再生可能 エネルギー]

Stefan Krauter just published a new paper on a hybrid pv and hydrogen fuel cell model for reducing grid interaction, etc.

Interesting topic, basically modeling a typical household using surplus of PV energy to fill up an hydrogen tank during the summer,
and using the hydrogen in winter to produce additional heat and electricity.

The Solar production model was based using 22 PVs of 310W (or 6.8 kW) and a 16 kWh Li-ion battery.​

The above graph represents the monthly energy production (left bar) versus the monthly energy consumption (right bar).

From April to September, the PV production (blue) is sufficient, but from October to March there is additional Fuel Cell production.​

The household consumption (orange) is about constant, and heating is produced (grey) mostly in winter using a heat pump.​

Any PV surplus (green) is used to generate hydrogen by electrolysis.​

The above graph shows the total annual energy production versus the annual energy consumption.

The total PV production (blue) provides about 90% of the energy and the Fuel Cell (grey) production is about 10%.​

About 50% of the consumption (orange) was used for the household utilities,​

and the remaining 50% of the consumption (yellow) was used to generate hydrogen.​

​

The hydrogen efficiency is about 20%, however the hydrogen production used surplus of energy.​

Also the heat produced by the fuel cell gets harvested using the heat pump.​

There is no mention of any Mini Split Air Conditioning usage during the summer.​

This study didn't provides any cost of the hydrogen system, which includes as main components
a 5 kW hydrogen electrolyser, a 2 kW fuel cell, a 5 cubic meter hydrogen tank, and a 300 bar compressor.

Note: Supposing that the hydrogen system costs was $20k, and is used to produce about 1,000 kWh.
If the cost of the electricity from the grid was $0.40, the cost of 1,000 kWh would be $400,
so it could take ($20k / $400) = 50 years to break even?

I would be interested doing an DIY FC based on a Toyota Mirai.

 

[Josi]