Idé- och inspirationsmaterial för lärare - Teknikens Hus
Idé- och inspirationsmaterial för lärare - Teknikens Hus
Idé- och inspirationsmaterial för lärare - Teknikens Hus
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Renewable sources of energy: the sun<br />
Thermal conversion<br />
of solar energy<br />
Hot water<br />
For example, I can use THE SUN’S ENERGY in<br />
two ways<br />
Solar<br />
sensor<br />
Coolant circuit<br />
Tank<br />
Solar heating at Pressins (38)<br />
Cold<br />
water<br />
Inlet<br />
Electrical conversion<br />
of solar energy<br />
Photovoltaic<br />
panel<br />
Regulator<br />
Lighting<br />
Fridge<br />
THERMAL SOLAR ENERGY<br />
Black panels capture the sun’s heat and warm<br />
up the coolant which circulates inside. The coolant<br />
exchanges its heat with the water contained<br />
in the tank. The water is then used for<br />
washing or heating. In our region, solar cells<br />
can provide a family with half of the warm<br />
water and heating it needs. (That can avoid<br />
the discharge of more than 1.2t CO 2<br />
per year<br />
per family.)<br />
PHOTOVOLTAIC SOLAR ENERGY<br />
The blue sensors composed of silicon solar<br />
cells (semi-conductor) transform sunlight into<br />
electricity. This phenomenon is called “the<br />
photovoltaic effect”. The electricity produced<br />
in this way is used for numerous applications,<br />
from the electricity supply for a pocket calculator<br />
to power stations producing electricity,<br />
not forgetting the supply to isolated places<br />
(houses, radio aerials etc.)<br />
Battery<br />
Computer<br />
Photovoltaic sensors at Echirolles (38)<br />
At present, 0.03% of the<br />
energy used in Europe<br />
comes from the sun.<br />
64
Change language