Gas-liquid phase separator

A heat transfer system, comprising a heat transfer fluid flow loop that comprises:

• an evaporator heat exchanger comprising a heat absorption side comprising a fluid inlet and a fluid outlet for the heat transfer fluid, the evaporator configured to absorb heat from a conditioned space to vaporize a liquid phase of the heat transfer fluid;
• a condenser heat exchanger comprising a heat rejection side comprising a fluid inlet in fluid communication with the evaporator heat absorption side outlet, and a fluid outlet for the heat transfer fluid, the condenser configured to reject heat to a heat sink to condense a gas phase of the heat transfer fluid;
• a gas-liquid separator, comprising
• a fluid guide member comprising a fluid inlet in fluid communication with the condenser heat rejection side outlet, and a fluid outlet, the fluid inlet and fluid outlet connected by a conduit configured as an elongated spiral disposed about an axis;
• a liquid coalescing medium disposed on an exterior surface of the fluid guide radially outward from the elongated spiral conduit with respect to the axis;
• a plurality of radial channels providing radial flow paths for fluid from the elongated spiral conduit to the coalescing medium;
• and
• a pump comprising a fluid inlet in fluid communication with the fluid guide member fluid outlet, and a fluid outlet in fluid communication with the evaporator heat absorption side inlet.