How AI, OpenAI, and ChatGPT impact business and software.
Solar energy
1.
2. yellow dwarf star in the center of the solar
system
diameter = 1,392,000 km, 109 times of earth’s
mass = 2×1030kg, 330,000 times of earth’s
99.86% of the solar system’s total mass
¾ hydrogen, the rest is mostly helium
primary source of energy in the earth
3. the earth receives 174 petawatts [1015 watts]
from the sun
30% is reflected into space and the rest is
absorbed by land, oceans, clouds etc.
the total energy absorbed by earth’s
atmosphere, oceans, land mass is 3,850,000
exajoules [1018 joules] per year
energy entering the earth from the sun is
twice the energy harnessed from all non-
renewable sources of energy combined
4. generating electrical power by converting
solar radiation into dc electricity using
semiconductors that exhibit the photovoltaic
effect
The photovoltaic effect is the creation
of voltage or electric current in a material
upon exposure to light
first observed by Alexandre-Edmond
Becquerel in 1839
5. also called solar cell, is an electrical device
that converts the energy of light directly into
electricity by the photovoltaic effect
made of monocrystalline silicon or
polycrystalline silicon or amorphous silicon
or cadmium telluride, or copper indium
selenide/sulfide
first built by Charles Fritts in1883 by coating
the semiconductor selenium with an
extremely thin layer of gold
6.
7. photons in sunlight hit the solar panel and
are absorbed by semiconducting materials,
such as silicon
electrons are knocked loose from their
atoms, and current starts flowing through the
material and this electricity is captured
an array of solar cells converts solar energy
into a usable amount of direct current [DC]
electricity
8. “nellis solar power plant” contains 70,000 solar
panels that will generate 25 million kilowatt-hours
9. “solar one”, california 1,800 sun-tracking mirrors
reflect heat to a central collector
12. solar energy is a renewable source of energy
in the presence of solar power, use of non-
renewable sources of energy like petroleum
can be lessened which also lessens pollution
unlike others, solar energy can be harnessed
and used in remote locations like mountains
even though solar panels are expensive, the
total amount that would be saved makes the
price of the panels will seem small
13. solar panels are expensive
solar power is inefficient in cloudy areas
batteries and solar panels occupy more
space
solar power maintenance is a problem
especially to those who doesn’t know the
proper technician
disposal is difficult for the batteries and solar
panels when they have broken down
because they contain toxic chemicals like
14. http://www.solarenergy-solarpower.com
http://www.wikipedia.org [wikipedia]
http://www.google.com [google images]
the world of science, vol 10, technology of
change