It is not very surprising if somebody calls it best practice project. Allegedly, the Phi Suea House is the world’s first 24h solar-powered hydrogen storage multi house residence. It is 100 percent self-sufficient and located in Chiang Mai, a city of around 150,000 inhabitants in the northern part of Thailand.
Phi Suea combines several strategies for a for a holistic approach to sustainable and self-sufficient living
The mix of European technology and Thai sun enables to build an own micro-grid. Four family homes plus support buildings are powered by a centralized distribution and storage. Photovoltaic panels with an overall peak capacity of 86kW generate all the desired energy of the compound. Surplus energy can be stored in lead-acid battery banks. It also can be used to split water with an electrolyzer into its composite gases. The hydrogen gas is stored in a tank. All solar panels generate an average of 140,233kWh/year. It is enough to drive 370,523km by car.
The fuel cells using hydrogen provide the energy demand in the night. The batteries cover short peak demands. The entire site can be powered with the hydrogen tank for 30 hours with 4kW. Because of the modular concept, it is adaptable to numerous different situations, where complete independence from the grid is desired.
For a holistic approach to sustainable and self-sufficient living, several strategies have been combined. A designed water collection system saves and reuses as much of the rain and irrigation water as possible. Around 1000m³ can be stored in the water reservoir. Solar thermal energy heats water with the suns’ energy. The home automation has been integrated for its potential in energy saving and carbon footprint reduction.
|HYBRID ENERGY STORAGE||HYDROGEN / BATTERY|
|Type||2x 2000Ah lead-acid battery banks|
|Nominal capacity per battery bank||96kWh (48kWh at 50% DOD)|
|Electrolyzer maximum power demand||8kW|
|Hydrogen gas production rate||max. 2000 liters/hr|
|Hydrogen Energy Storage capacity||90,000 liters of H2 at 30 bar|
|Fuel Cell power output||4kW|
|Fuel Cell autonomy at full storage||130kWh|