The condensed, liquid refrigerant, while in the thermodynamic state generally known as a saturated liquid, is next routed by way of an expansion valve the place it undergoes an abrupt reduction in pressure. That tension reduction leads to the adiabatic flash evaporation of the A part of the liquid refrigerant. https://purethermal.co.uk/media-news/can-gas-absorption-heat-pumps-provide-an-alternative-heat-pump-option-in-2025/