How to create electricity?

Chapter 5 "Towards the future power generation"

	Next,let's learn same power generation which is more benefit in safetly and atmosphere of the earth. The first is "the solar electric generation".
	I have seen a big panel on the roof. It is a solar panel?
	That's right.The solar generates electric power. The panel means a solar battery. You can see the similar one on the calculator.
	The solar battery helps us a lot.
	The good thing is that once you fix the solar battery, the power generation is undertaken safely without a visual control. Sometimes you need a check.That's all.
	It's cool.Nothing dangerous.
	And the excess electricity generated at home will be purchased by Power Supply Company.
	It's interesting,isn't it?But I think there are some cons.
	The cons of solar electric generation is the limitation that the sun must be shining.
	That's true. It is out of work in a cloudy day or at night.
	Snowing masks the solar panel. Because the weather modulates the cavity of power generation, the solar power won't supply in a stable manner.
	Well,it is not always sunny.
	Another point is that the solar battery is expensive. The components are almost to be recycled,but the cost to be recycled, but the cost to set at home is still expensive.
	I understand.The solar generation won't be a major system.
	An alternative system is wind power generation.
	Is it wind?
	Yes.Have you seen the propeller rotating by the motor?
	Of course.
	This is opposite.Wind rotates leading power generation.
	Aha!It seems a light of the bicycle.
	That's right.If you rotate the motor,you can obtain electricity. This is simple and obvious way to generation electricity.
	Is there any problem?
	Definitely,you need wind. That's why the wind power generation won't be stable.
	Isn't it a common concern whenever we use the natural power?
	The wind power generation is more familiar in Europe and United States than Japan.
	We need strong wind.
	The third option is geothermal power generation.
	Geothermal?How do you generate electricity?
	It is similar to thermal power generation. It uses water vapor.Please imagine hot spring.
	Well,is it steam?Does "geothermal"mean"below-ground-thermal"?
	That's right.You can find hot spring below the ground. First,convent hot water heated by magma to steam, then rotate the turbine.
	The stop of fuel in the thermal powergeneration switches to the naturally existing power,doesn't it?
	Yes,it does.Geothermal plant works more stably than the previously shown two plants.
	It is popular?
	The amount of electric supply by geothermal power is the fourth; 1st is water power,2nd is thermal power,and the 3rd is nuclear power. But…
	Anything else?
	The share is only one percent ever it is the fourth.
	Just one percent?It seems not so popular.
	It takes more time for natural energy to become main source for power generation.Technology is progressing.
	Our life really depends on fuel so as to generate electric power.
	Other type of power generation includes wave-power generation whose plant utilizes ocean wave and solar thermal power generation whose plant utilizes heat of the sun.
	Any kind of natural power looks useful for power generation.
	Agree.A leading edge technology may let us use less water power, thermal power and nuclear power.
	I think so.Although the change is gradually happened, I would like to convert the conventional system to natural power system.
	The chapter is over. Please send your thoughts to the site "Think".
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	Thank you for staying with us.

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