Siemens cycle

Siemens cycle process is a technique for cooling or liquefying gases. A gas is compressed, which leads to an increase in temperature according to the law of Gay- Lussac. The so compressed gas is then cooled in a heat exchanger. Then, the compressed, cooled down to ambient temperature gas is expanded, resulting in a temperature decrease causes, in turn, according to the law of Gay- Lussac. The result is a gas ( or liquid ) that is colder than the initial state and under the same pressure can stand as the initial state.

Carl Wilhelm Siemens settled the Siemens process patented in 1857 ..