is almost constant for all heat source temperatures. Ejector is
a fixed-area device working under choked flow condition at
motive nozzle. The mass flow rate of refrigerant flowing
through the motive nozzle depends on pressure at the inlet of
the motive nozzle (upstream pressure). This upstream
pressure also depends directly on the heat sink temperature.
For the same subcooling at the inlet, the mass flow rate of
refrigerant flowing through motive nozzle at higher
upstream pressure (higher heat sink temperature) is higher
than that at lower upstream pressure (lower heat sink
temperature).