First school in SLOVENIA with solar power plant

AND THE SUN STARTED SHINING

Authors: Janez TrohaIstok Lenarčič

Mentors: Valentin Peternel Mirja Mrovlje Pečnik

∆ SŠTS Šiška

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

MONOCRYSTALLI

NE 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!

GCS: Solarni sistemi © Bojan Grobovšek [2007]http://gcs.gi-zrmk.si/Svetovanje/Clanki/Grobovsek/PT237.htm

Illustrations: © Janez Troha [2008] Photographs: Zdavko Žalar [2007]

Neznana Oseba [2007]

Wikipedia: Electricity Meter (GNU FDL license) [2008]

http://en.wikipedia.org/wiki/KWh_meter Documentation © Kon Tiki Solar d.o.o [2008]

Sources