Solar Power and Fusion

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THE EARTH’S

SOURCE OF POWER

DEUTERIUM

FUSION

NEUTRON

HELIUM

TRITIUM http://fusioned.gat.com

Nuclear Fusion

• Nuclear fusion is the process by which multiple nuclei join together to form a heavier nucleus. It is accompanied by the release or absorption of energy depending on the masses of the nuclei involved. Iron and nickel nuclei have the largest binding energies per nucleon of all nuclei and therefore are the most stable. The fusion of two nuclei lighter than iron or nickel generally releases energy while the fusion of nuclei heavier than them absorbs energy; vice-versa for the reverse process, nuclear fission.

Complete the Reaction

1

H element atomic number

(protons)

4

Be

1

H

6

C

2

He

1

H

1H

2

He

2

He

6

C

4

Be

8

O

2

He

2

He

Cookie Fusion

• Procedure

• Cut 2 squares of wax paper 10 cm on a side

• Cut 5 cm wide slice of cookie dough (atom)

• Find the mass of the atom and record on the table

• Place the atom one cm away from the edge of a wax paper square

• Repeat step 2 thru 4 for a second atom

• Place the atoms about 2 cm from each other

• Place both atoms on a plate and microwave for 1 minute

• Remove the “new element” and let cool for 2 minutes

• Find the mass of the “new element”

• Complete the table

Atom 1

Atom 2

Total

Difference

Cookie Fusion

Mass Before

Cooking

Mass After

Cooking

Fusion Changes Mass to Energy

E=mc

2

.993 kg Helium

1kg Hydrogen

What is Solar Energy?

• Originates with the thermonuclear fusion reactions occurring in the sun.

• Represents the entire electromagnetic radiation (visible light, infrared, ultraviolet, x-rays, and radio waves).

How much solar energy?

The surface receives about 47% of the total solar energy that reaches the Earth. Only this amount is usable.

Global Solar Energy Balance

Solar Energy Input (TeraWatts) 178,000

Reflected to Space Immediately 53,000

Absorbed and Then Reflected as Heat

Used to Evaporate Water (Weather)

82,000

40,000

Captured by Plant Photosynthesis

Total Energy Used by Human Society

100

10

Total Energy Used by US Society 2.5

Total Human Food Energy 0.6

1 Terawatt = 1x10 12 Watts www.hubbertPeak.com/debate/oilcalcs.htm

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