Case studies


 

Porto Santo


 
NAME: Porto Santo
Porto Santo
LOCATION: Madeira Archipelago, Portugal
GEOGRAPHIC COORDINATES:

33 3' N and 16 21' W

AREA: 42,3 km2
POPULATION: 4.470
TOPOGRAPHY:
Coastal cliffs, grasslands and mountains.
CLIMATE:
Mild winters and warm sunny summers, temperatures influenced by the ocean.
GRID:

Isolated, 2x3.5 MW and 2x3.4 MW Diesel units and wind farm with 2x225 kW and 660 kW turbines.

     
The values for the demand used for this study are based on the high development scenario forecasts, and it is assumed that Porto Santo Island will show the same evolution as Madeira Region as a whole. The yearly electricity demand growth rate is expected to be 8%during 2000-2005 period and 7% during 2005-2010 period.

 

Porto Santo load

 

Figure 1. Electricity demand scenario

 

In order to test the model four hydrogen storage test cases were run for Porto Santo, peak shaving with wind, peak shaving with wind and solar PV, and 100% renewable wind only, and wind and solar.

 

 

SCENARIOS

 

Peak shaving with wind and with wind and solar PV. In order to compare peak shaving with hydrogen storage, between wind only and wind and solar renewable energy sources, the goal was set to have approximately similar ratios of electricity coming directly from renewables 16.5%, from fuel cells 1.8%, and the rest from diesel. In both cases the renewable hourly output to grid was limited to 30% of the system load.

 

100% renewable with wind only and wind and solar. The calculation was made for 1 year and does not account for the growth of demand that will certainly be significant, due to tourism. The wind scenario envisages 25 MW of wind turbines, five times the annual peak, while the wind-solar scenario envisages 11 MW of wind turbines and nearly 20 MWp of solar PV installed. Both scenarios need an electrolyser unit of 11 MW, double the peak, and a fuel cell that can cover the peak of 5.5 MW.