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Solar Energy Essay, Research Paper

Solar Energy Outline

Thesis: Ever since the dawn of time, the sun has been a resource we cannot

live

or do without, so its not such a shock that man has come up with

the

idea of solar energy. Solar energy had many uses. Some can be

dangerous and some, a very valuable asset to the modern

world.

I. What is solar energy?

A. Who was the first person to use solar energy?

B. When was it used?

C. Where was solar energy first put to use?

II. What are some of the uses of solar energy?

A. Solar roof

1. Who invented it?

2. When was it invented?

3. What was it used for?

4. How does it work?

B. Solar cooker

1. Who invented the first one?

2. When was it invented?

3. How does it work?

4. What is it used for?

C. Solar oven

1. Who developed it?

2. When was it developed?

3. What does it look like?

4. How does it work?

III. What are some of the dangers of solar energy(used today or otherwise)

A. Laser

1. What is it?

2. How does laser work?

B. Ultra-Violet Rays (UV rays)

1. Who discovered UV rays?

2. When was it discovered?

3. In what way is it dangerous?

4. How can we protect ourselves from this?

IV. Conclusion

A. What are some uses of solar energy around our household?

1. List some examples

C. Thoughts on Solar energy

1. What we think of solar energy

2. Poll results

A Primitive Resource:

Solar Energy and Its Many Uses

Ever since the dawn of time, the sun has been a resource we cannot

live

or do without, so its not such a shock that man has come up with the

idea of solar energy. Solar energy had many uses. Some can be dangerous

and some, a very valuable asset to the modern world.

Solar energy is energy derived from the sun in a form of ultra-violet

rays. Its was first applied to use in 212 B.C., by the Greek genius

Archimedes. Solar energy was used to defend the habor of Syracuse against

the Roman fleet. Archimedes used a mirror or ?burning mirror? as they

had called it, to set fire to the ships of the Roman fleets while standing on

shore (McDaniels 83). It wasn?t until 1615 when Salomon de Caux

constructed the first solar device; a solar engine. His device was made of

glass lenses, supporting frame, and an airtight metal vessel containing

water and air. This produced a small water fountain when the air heated

up during operation. This was considered to be more of a toy than a device,

but it was the first published account of the use of solar energy since the fall

of the Roman Empire (Cheremisinoff 1).

Some other use of solar energy after that was the solar roof and the

solar oven. The solar roof was thought up by Harold Hay. In a solar roof

system, water is contained in a clear plastic bag and it is placed on a black

metal roof. Hay got the idea while traveling in India on a technical aid

mission for the U.S government. While there, he noticed that many people

were living in rusty, sheet metal shacks, which were hot in the day and cold

at night. Hay?s plan was to remove the insulation from the roof on winter

days so that the roof would get hot, and Replacing the insulation at night to

allow the shack to be warm through the night. Then in the summer, he

would so the reverse of what he did in winter to let the house cool at night

and replacing the insulation in the daytime to block out the heat. Then over

the years, Hay and a man named John Yellott constructed a 3- by

3.7-m building using water basins as the actual roofing material. During

the summer, a slab of foam insulation was rolled back at night, and the

water would become cold through the night sky evaporation. Since the

water supply sat directly on a metal ceiling, it absorbed the heat from the

room and kept the building air-conditioned all day. During the winter, the

movable insulation was rolled back in the daytime which allowed for it to

collect heat. This generated enough heat into the house through the ceiling

at night to keep the room comfortable (McDaniels 179-181).

Then there was the solar cooker. Developed by Augustin Mouchot in

France and by John Ericsson in the United States in the nineteenth century.

They wanted to develop a solar cooker that not only reached high

temperatures, but also was to be used as a means of heat storage enabling

food to be cooked after sundown. Mouchot built a solar steam engine that

operated a printing press in Paris in 1882. In the United States, John

Ericsson invented what he called the ?Ericsson-cycle? which was a hot-air

engine for the making of solar heat. The sun?s rays would be concentrated

with the use of a parabolic reflector, which was designed to track the sun

across the sky in order to keep a constant power output.

(McPhillips 86-89)

There was also the solar oven. In 1837, and astronomer from

England named John Fredrick Herschel introduced to the world a solar

oven. He built a small solar oven while on a trip to Africa?s Cape of Good

Hope. He constructed it as a mahogany, painted it black and buried it in

the sand for purposes of insulation. a doubled-glazed cover, which was the

only portion of the oven left exposed, serve to limit heat losses through the

top, while at the same

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