princess from the underworld

Chapter 620 text 630
When Ah Xuan saw it, he ran over to blow it up in anger, trying to blow up the fire, Zi Yan laughed loudly, walked over and poured out a bottle of unknown medicine, and the fire suddenly rose up, scaring Ah Xuan back again and again.

After disposing of the clothes, Ah Xuan didn't have the heart to mess with Ziyan any more, he sat down on the chair in a serious manner, and Ziyan didn't smile any more, and sat opposite him, lying down on the chair. Tea warmed her body, and finally she was the first to speak: "Maybe, we have a way to go back."

A Xuan nodded, looked at the lightning outside the window, "If the material allows, maybe it is really feasible."

Ziyan's eyes lit up, she picked up the brush and paper on the table and began to count, she kept muttering: "At any given moment, there are 1800 thunderstorms happening in the world, about 100 times per second. Lightning strikes, on flat terrain with an average lightning frequency, average a 300-foot building to be struck once a year. A 1200-foot structure, such as a radio or television tower, is struck 20 times a year. times, each lightning strike usually produces a high voltage of 6 million volts. Each lightning strike from the cloud to the ground actually contains 60 to 3 separate lightning strikes that occur within 5 milliseconds intervals, and the peak current of the first lightning strike is about 2 amps, the peak current of subsequent lightning strikes is halved. After the last lightning strike, there may be a continuous current of about 150 amps for a duration of 100 milliseconds. The rise time of these lightning strikes has been measured to be about 200 nanoseconds or faster. Through 2 amperes and 200 nanoseconds, it is not difficult to calculate that the value of dI/dt is 10^11 amperes per second! Do you think we can use these to return to modern times?!"

Axuan looked at Zi Yan in surprise, "The average current of lightning is 3 amperes, and the maximum current can reach 30 amperes. The voltage of lightning is very high, about 1 million to 10 billion volts. The power of a moderately intense thunderstorm can Up to 1000 million watts, which is equivalent to the output power of a small nuclear power plant. If we can collect one hundredth...no! One thousandth of them, it will be enough for us to travel in time and space again!"

"But..." Ziyan frowned, "Look, first of all, if you want to collect lightning, you need a fixed energy receiver, but the location of lightning is not fixed. Then, lightning is sudden, not intended There is. Then, the energy of lightning is uncertain, sometimes large and sometimes small, even if there is a receiver that can withstand some lightning, it does not mean that it can withstand all the lightning energy. Also, the voltage of lightning is high, the current is large, There must be materials that can withstand such a high voltage and such a large current to be able to collect the energy of lightning. In addition, lightning must be stored if it is to be collected, and storage requires a capacitor that can be charged extremely quickly. Although the Leiden bottle can store electricity , but its stored amount is very small, which is a key issue for energy conservation. In the end, even if the energy of lightning is stored, because the voltage is too high, it is still DC, and what method to use to turn it into available energy is still very large The problem is that this huge energy release phenomenon is uncontrollable, just like nuclear energy, because we can control the rate of the fission chain reaction, so it can be used, but if it cannot be controlled, it will become an atomic bomb explosion! In theory, it is still possible Yes, but as far as we are now..."

"Maybe we should consider one by one, and some of them can still be solved."

(End of this chapter)