You would be aware that the exhaust from a condensing turbine is saturated, so the temperature is a pure function of pressure. A typical design exhaust pressure is -80 kPaG, corresponding with 61 deg C.
Slugging a centrifugal compressor with liquid will clearly do damage - my own experience is knowing of one machine in an ethylene plant in France that had neither high level cutouts nor vibration protection. In that case a gearbox had the teeth stripped (the configuration was...
There are many locations to find this sort of detailed information (like the various centrifugal compressor vendors), but the one fundamental piece of advice that I would give you is that an impeller has one characteristic curve for a given speed, when actual inlet volume (in say m3/h)is plotted...