Indipendenza energetica: più unità

An isolated pumping installation needs to collect previously discharged 500 l/s, and pump them at 32 m.c.a. A parallel, electrical grid is available to provide the specific energy deficit thereby guaranteeing pumping at a constant flow. The power demanded will be: kW = 500 x 30/85 = 188 kW.

Assuming an engine performance (0.96), an inverter (0.97) and a maximum loss (in Summer) of 22%, the photovoltaic power to be installed will be 258 kWp.

The photovoltaic field will consist of four ADES dual-axis four solar trackers ©, of 63.3 kWp with 192 panels arranged in 8 rows at different levels to improve cooling. Two trackers will operate a 100 kW engine. A third motor of the same power will be connected to the network to provide the deficits, as shown in the diagram.

The graph below, sets forth the energy gains obtained with ADES dual-axis four solar trackers © versus a fixed installation at a 35 degree angle.

Flows pumped from both the available solar energy (200 kW) and from the grid (100 kW)

The sum of pumped quantities (off-grid solar plus on-grid nocturnal) represents low-cost pumping capacities