How a Turbo-expander works in LNG plant?

A turbo-expander in an LNG (liquefied natural gas) plant is used to convert high-pressure natural gas into a low-pressure state while simultaneously extracting energy from the gas. As the gas expands through the turbo-expander, it cools significantly, which helps in the liquefaction process. The energy extracted can also drive a generator or other equipment within the plant. This process enhances overall efficiency by utilizing the energy from the gas expansion, contributing to the LNG production process.