Primary School entjernejStudents: Nea Cerinek, Eva Novak, Svetlana Gotovac,

Anja nidariMentors: Slavica Jordan, Roman Turk

SLOVENIA

GREEN HEATING

CONTENTS

WHAT ARE SOLAR PANELS

RESEARCH QUESTION AND GOAL

TO DO LIST

HYPOTHESIS

WORK COURSE

RESULTS

VERIFICATION THE HYPOTHESIS

IMPROVEMENTS

FUTURE RESEARCH

WHAT ARE SOLAR PANELS?

THEY TRANSFORM SOLAR ENERGY INTO THERMAL ENERGY

RESEARCH QUESTION AND GOAL

HOW TO INCREASE THE POWER OF SOLAR PANELS?

THE DIFFERENCE BETWEEN:

SOLAR PANELS

SOLAR ENERGY IS TRANSFORMED INTO THERMAL ENERGY

SOLAR CELLS

SOLAR ENERGY IS TRANSFORMED INTO ELECTRICITY

FORM HYPOTHESISMAKE A PROTOTYPE MODEL OF A SOLAR PANEL INITIAL MEASURMENTS CALCULATE ITS POWERSEARCH FOR POSSIBLE IMPROVEMENTS AND

MAKE MODELS OF IMPROVED PANELSADDITIONAL MEASURMENTSCALCULATE POWER OF THOSE PANELSVERIFICATION OF HYPOTHESISOPTIONS FOR FURTHER RESEARCH

RESEARCH STEPS

HYPOTHESIS

THE POWER OF OUR PROTOTYPE MODEL OF A SOLAR PANEL WOULD INCREASE IF WE USED LONG BLACK PIPE, BLACK MATTE LINING AND MIRRORS

THE EQUATIONS FOR CALCULATION OF THE POWER OF THE PANEL

=2 2 ( )

P=2 THE POWER IS PROPORTIONAL TO:

- THE VOLUME FLOW OF WATER - THE SPECIFIC HEAT OF WATER 2- THE TEMPERATURE DIFFERENCE BETWEEN OUTGOING AND INCOMING WATER

WORK COURSE

MAKING OUR PROTOTYPE MODEL OF A PANEL

MEASURING (THE FLOW, TEMPERTURES )

CALCULATING THE POWER OF THAT PANEL

CHANGING THE PARAMETERS

STRINGING UP THE PIPES IN THE BOX

INSTALLING THE PLASTIC BOTTLE (FILLED WITH WATER) IN THE POULTRY WATER SUPPLY DEVICE

INSTALLING THE THERMOMETERS (ONE AT THE START AND ON THE END OF IT) AND VALVE

PREPARING THE REFLECTOR

WORK COURSE

START WITH MEASUREMENT OF THE TEMPERATURE

PROBLEMS

PERFORATED PIPES

CURRENT FLOW OF THE WATER WAS NOT CONSTANT

PROTOTYPE MODEL OF PANEL (1)

BOX (PLASTIC)

PIPE

FOIL (ALUMINIUM)

STYROFOAM

POULTRY WATER SUPPLY DEVICE

PLASTIC BOTTLE (COCA COLA)

THERMOMETER AND VALVE

REFLECTOR

PROTOTYPE MODEL OF A SOLAR PANEL

SCHEME OF PROTOTYPE MOEL OF A SOLAR PANEL

RESULTS 1*

PROTOTYPE MODEL OF A SOLAR PANEL

P [W]

2,1

0 1 2 3

*Pr - prototype

IMPROVEMENT no. 1 (2)

PROTOTYPE MODEL OF PANEL

MIRROR (FOIL ALUMINIUM, CARTON)

ATTACHED TO STYROFOAM PLATE

ILLUSTRATION OF THE EXPECTEDREFLECTION OF THE LIGHT

HOME-MADE MIRROR

RESULTS 2

P[W]

3,4

0 1 2 3 4

PANEL WITH MIRROR

IMPROVEMENT no. 2 (3)

PROTOTYPE MODEL OF PANEL

BLACK PIPE

OUR PANEL WITH BLACK PIPE

RESULTS 3

4

0 1 2 3 4 5

PANEL WITH BLACK PIPE

IMPROVEMENT no. 3 (4)

PROTOTYPE MODEL OF PANEL

LONGER PIPE + BLACK MATTE LINING

OUR PANEL WITH LONGER PIPE AND BLACK MATTE LINING

RESULTS 4

7,9

0 2 4 6 8 10

PANEL WITH LONG PIPE + BLACK MATTE LINING

IMPROVEMENT no. 4 (5)

PROTOTYPE MODEL OF PANEL

BLACK PIPE

BLACK MATTE LINING

OUR PANEL WITH BLACK PIPE AND BLACK MATTE LINING

RESULTS 5

P[W]

19,4

0 5 10 15 20 25

PANEL WITH LONG PIPE + BLACK MATTE LINING

RESULTS

OUR BEST IMPROVEMENT

WERE BLACK PIPE

+ BLACK MATTE LINING

P[W]

PROTOTYPES

RESULTS

no. measurment

volume ofthewater

time interval

input temp.

output temp.

- power of thepanel

=22

[W]

1 23 60 20.4 21.7 1.3 2.1

2 22 60 20.6 22.8 2.2 3.4

3 22 60 21 23.6 2.6 4.0

4 19 60 20.7 26.6 5.9 7.9

5 22 60 20.8 33.4 12.6 19.4

CONFIRMING OF THE HYPOTHESIS

WE PARTIALLY CONFIRMED THE HYPOTHESIS:

WE USED BLACK PIPE (NOT LONGER)

BLACK MATTE LINING

X WE HAVE NOT YET USED THE MIRRORS

FURTHER IMPROVEMENTS

BLACK COPPER PIPE

MOVING ROBOT (ON BATTERIES), WHICH WOULD MOVE THE MIRRORS

GLAZED

FURTHER RESEARCH

HOW TO RECYCLE SOLAR PANELS?

HOW COULD THE SOLAR PANELS TRANSFORM THERMAL ENERGY INTO ELECTRICITY?