Furthermore, the physical reasons of cooling and heating are analyzed on the basis of the Joule-Thomson experiment.
结合节流过程，从实验角度进一步分析了致冷和致热的物理原因。
2
If the wellhead pressure exceeds that of the pipeline, then the gas can be passed through a choke or throttled in a constant-enthalpy Joule-Thomson expansion to provide cooling.