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DENJIRO: Let's first take a look at this. Do you know what this is?
BOY: Is it a black rock?
DENJIRO: This is coal. It is used as fuel in thermal power generation. Today, we'll perform experiments on coal. Here we have two types of coal: bituminous coal on the right and hard coal on the left. They don't seem to look much different, but you'll see the difference when we burn them.
Let's first burn bituminous coal. The coal is being heated from below. I will also heat it from above. As you can see, bituminous coal gets burning quickly, and once it does, it produces a lot of smoke and emits a unique smell.
How about black coal? This coal barely produces smoke or odor. However, it doesn't light easily.
As we've seen, coals have different characteristics depending on their types. Let's turn two types of coals into powder, mix them, and burn the mix.
BOY: It seems to have strong heating power, yet produce less smoke.
DENJIRO: Let's use this to generate electricity.
ON-SCREEN TEXT: This coal is different from what is used at a power plant.
DENJIRO: We'll place a flask filled with water over the heat. The steam will rotate this steam turbine to generate electricity.
The LED has turned on. At a coal-fired power plant, coal is burned to create steam, which rotates a turbine to generate electricity.
NARRATOR: At one of the biggest coal-fired power plants in Japan, located in Hekinan City, Aichi, about 10 types of coal are constantly in stock. In order to stabilize quality, cost, and supplies, coals of various countries are blended and used at the power plant.
DENJIRO: I hope energy will bring you all happiness. Our magic word is "Happy Energy!"