# Siemens cycle

> English word · Proper noun

## Definitions
1. A technique used to cool or liquefy gases, by compressing the gas (leading to an increase in its temperature due to the directly proportional relationship between temperature and pressure), then cooling it with a heat exchanger and decompressing it.

## Etymology
Carl Wilhelm Siemens patented the cycle in 1857.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/siemens-cycle