The exhaust turbines seems to be bugged. Or I don't know how to use them:-)
When connected to the source of steam, I would expect it consumes power/efficiency (so, for open turbine 1, 1MW/0.9 = 1.111MW) and then provide the factory with 1MW of electricity (or, If I understand the underlying mechanics right, it craft 2.01MJ of "Energy", then "burn" it to make electricity, in a time that result in 1MW output).
But it seems, it (open exhaust turbine 1) produces 1MW for 1.1s, then drops to 0 for 0.7s. It produces only around 610kW inn average.
I tested it with different loads. Sensors, electroliers (priority and surge), without or with accumulators (if it makes sense, so not with surge load). The effect is always the same. Open exhaust turbine 3 (with 100% efficiency) behaves the same, just go on and off with higher frequency.
This isn't just a power plot issue, buildings report "low energy" and I tested the output on electrolyzers, it is consistent with insufficient power.
The turbines in "standard" and "backup" mode works as intended, one turbine 1 perfectly powers an electrolizer or 10 sensors.
After updating (to 2.0.5) turbines still seems to drop energy, but the timings of "on" and "off" are less regular.
Edit: Another test, suggesting exhaust turbines doen't work well. Three open turbines 1, one exhaust, two standard. An 1MW electrolizer as a load (and 100W arithmetic circuit I forgot to separate). Ran for 1000 seconds. It used 284000 units of steam, worth 1704MJ, so 1.7MW of power in steam, that 90% turbine should translate to 1.53MW. On a 1MW load.
A sanity check: disconnecting exhaust turbine (so, we have two standard ones) it used 184980 units of steam worth 1109.9MJ for ~1.1099MW in steam and 0.999MW in electricity. Exactly as we would expect.
