Who invented the steam engine?

The first steam engine in the world was an air balloon invented by Herod of Alexandria in the 1 th century, but it was just a toy. About 1679, the French physicist Dennis Papen made the working model of the first steam engine after observing the steam escaping from his pressure cooker. Around the same time, Samuel Moran also put forward the idea of steam engine. Thomas Seville in 1698, Thomas Newcomen in 17 12 and james watt in 1769 made early industrial steam engines, all of which made their own contributions to the development of steam engines. 1807, robert fulton was the first to successfully use a steam engine to drive a ship.

Watt is not the inventor of the steam engine. Before him, the steam engine, newcomen Steam Engine, appeared a long time ago, but it consumed a lot of coal and was inefficient. Using scientific theory, Watt gradually discovered the faults of this steam engine. From 1765 to 1790, he made a series of inventions, such as separate condenser, cylinder external insulation layer, piston lubricated with oil, planetary gear, parallel linkage mechanism, centrifugal governor, throttle valve, pressure gauge and so on. , make the efficiency of the steam engine to more than three times that of the original newcomen machine, and finally invented the modern steam engine.