RE: RE: RE: RE: RE: RE: RE: RE: Baseload vs Interm OneEye,
Yes bottoming plants generally use post flash brine (occasionally they use secondary flashed steam as well) but the brine is not flashed to atmospheric pressure and thus the brine is still above atmospheric boiling temperature. 140-185C is typical though some are lower particularly dual flash plants. The limiting factors is silica scaling and flash plant power optimization (lower pressure/temp means more steam but the lower pressure means lower energy per mass unit of steam). Even with the lower capital cost it would not be economic for a ORC bottoming plant to operate below 100C unless there was a cheap source of cold cooling like a glacier fed river.