The Stirling Engine is one of the hot air engines. It was invented by Robert
Stirling (1790-1878) and his brother James. His father was interesting in engine and
he inherited it. He became a minister of the church at Scotland in 1816. At this period,
he found the steam engines are dangerous for the workers. He decided to improve the
design of an existing air engine. He hope it wound be safer alternative. After one year,
he invented a regenerator. He called the “Economiser” and the engine improves the
efficiency. This is the earliest Stirling Engine. It is put out 100 W to 4 kW. But the
internal combustion engine substituted for it quickly. The Ericsson invented the solar
energy in 1864 and did some improvements for after several years. Robert’s brother,
James Stirling, also played an important role in the development of Stirling engines.