First school in SLOVENIA with solar power plant

AND THE SUN STARTED SHINING

Authors: Janez TrohaIstok Lenarčič

Mentors: Valentin Peternel Mirja Mrovlje Pečnik

March 2008

AND SUN SHINES

Our solar power plant is quite powerful. It produces a maximum of

25,16 kWof electrical energy. That’s enough to rent it out into Elektro Ljubljana’s power network.

USAGE1We use our power plant to educate:

Solar technology

Information tech.

Development

All that thanks to the fact that we have a smaller, 3,74kW polygon exclusively meant to educate our students.

USAGE2We use it to educate our students about setting up and planning solar power modules and it’s systems.

We are proud to be the first in Slovenia to educate a school program called

SOLAR TECHNICIAN

USAGE3The second, and bigger 21,42kW polygon is being used to distribute electrical energy to Elektro Ljubljana’s power network.

So far ,we have produced a total of

9 437 kWh of energy

or

we have reduced CO2 emissions for

6 606 kg

Which is enough for

5 895 hours of dish washing

20 132 uses of hair dryer for 15 minutes

3 431 hours of laundry washing

Collecting

We chose solar power modules with best utilisation rate

MONOCRYSTALLINE TYPE

12 - 16%

efficiency (170w) per cell

500-1000 W/m2

170W230V

Solar power cell

A solar cell or photovoltaic cell is a device that converts solar energy into electricity by the photovoltaic effect. We chose company Kon Tiki d.o.o. to set up our power modules.

Electrical inverter

Converts direct current (DC) to alternating current (AC) and synchronises it with Elektro Ljubljana’s power network.

Current products on market offer integrated all kinds of protection circuits and do the synchronising part aswell.

Electricity meter

Measures amount of electrical energy, that was sent out into electrical power network.

(Project realisation)

How did we do it?

Project realisation

Project realisation began with planning the whole system, which among other things includes picking the right spot for installation of our solar power modules.

Setting up our solar power plant

Separative measurement place

Inverters are plugged to public electrical network trough so called “separative measurement place”.

Separative measurement place ensures reliable separation of generator and public electrical network, which in case of malfunctions prevents material damage from the side of power network or vice versa.

Conclusion

Solar and other alternative power sources certainly are our future.

It's up to us to replace environmental-unfriendly power sources as soon as possible.

Let's keep our nature, that is hosting us on this beautiful planet clean!

1 Zdravko Žalar; Sončna elektrarna SŠTS Šiška; http://www.s-ssts.lj.si ; SŠTS; Ljubljana, 2008, 2 Zdravko Žalar; Predstavitev - Projekt ‘Omrežna sončna elektrarna 26kWp’’; SŠTS Šiška &

Elektro Ljubljana; Ljubljana, februar 2008, 3 Gašper Škarja; Tehnični opis MFE SŠTS Šiška, Kon Tiki Solar; Kamnik; Ljubljana, 2007, 4 Zdravko Žalar; Fotografije - Projekt ‘’Omrežna sončna elektrarna SŠTS Šiška’’; SŠTS;

Ljubljana, 2007, 5 Valentin Peternel; Fotografije - Projekt ‘’Omrežna sončna elektrarna SŠTS Šiška’’; SŠTS;

Ljubljana, 2008, 6 Janez Troha; Ilustracije; Ljubljana, 2008, 7 Borut Bavčar; Pred desetletji strugarji, zdaj solarni tehniki, mehatroniki; DELO;

Ljubljana, 2007, 8 Elektro Ljubljana; Elektro Ljubljana in Srednja šola tehniških strok Šiška v Ljubljani sta

zgleden primer javno-zasebnega partnerstva; Finance; Ljubljana, 2007, 9 Kon Tiki Solar; Katalog 2003 – Solarni sistemi Kon Tiki Solar, Kon Tiki Solar; Kamnik;

Ljubljana, 2003, 10 Elektro Ljubljana; Zelena energija / Sončne oz. fotovoltaične elektrarne / SE na Litostrojski

cesti 51; http://www.elektro-ljubljana.si/ ; Elektro Ljubljana; Ljubljana, 2008, 11 Bojan Kovač; Srednja šola tehniških strok SŠTS Šiška praznuje 60 let delovanja; Svet

elektronike; Ljubljana, november 2007, 12 Bojan Grobovšek; Solarni sistemi za ogrevanje in pripravo tople vode v NEH in PH;

http://gcs.gi-zrmk.si/Svetovanje/Clanki/Grobovsek/PT237.htm ; Gradbeni center Slovenije; Ljubljana, 2008,

13 Wikipedia; Electricity meter; http://en.wikipedia.org/wiki/KWh_meter ; Wikipedia, 2008,

Sources and literature