Solar Array on the Roof
Basic system requires 10 kW, assume year around average of five solar hours per day across the middle of the US. Therefore the system can generate 50 kWh per day. |
Grid Intertie Inverter Electronics Module
This module changes the Direct Current electricity from the solar array or the fuelcell into 120 V Alternating current so that it can directly power normal appliances within the house. (At the peak of the day, noon to 4 PM, your solar system should feed the grid and offset peak cost electricity. The rest of the day your system should be routed to the electrolyser to store hydrogen energy for night time, fuel cell use). |
Electrolyser/Compressor
In outside module. Peak power of 7 kW. Assume an efficiency of 70%. (The system must utilize power to filter water and compress the hydrogen gas). |
Storage tank system
Either pressure gas or hydride, dispenser nozzle. Assume you need enough extra storage to run your home for five cloudy, rainy days. An average size house will utilize 20 kWh per day so 143 kWh (assume 70% efficient fuel cell) or approx 50 cubic meters of STP hydrogen are required. |
Fuel Cell
A 5 kW (70% efficient), low temperature, low pressure, adiabatic, Proton Exchange Membrane, (PEM) fuel cell with a built in heat exchanger, can provide a peak of 5 kW of electricity plus 2 kW of low grade (80 degree C) heat. |
Home Maintenance Equipment
A mobile fuel cell power module equipped with an inverter, of approximately one kilowatt, can provide sufficient electricity to power, hedge trimmers, portable saws, drills, etc. Lawn mowers will have their own storage tanks and fuel cells. |
Passive Solar Design
Has be included in the home. Solar gathering and storing means, such as Tromb walls, basement rock thermal storage, high wall, window, and ceiling insulation and leak prevention have been utilized. Additionally, Solar Water Heaters and pool heaters are a necessity.
These passive heating steps are necessary. Then hydrogen can be utilized through catalytic burners for cooking and peak water heating. Then the home is self powering and has a viable future. – John Gotthold |
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