Here is an interesting post on Vortex L by Bob Cook mentioning that negative pressure should normally form to pull the steam through the plant. He stresses the need for a plant schematic to be released. Since this type of engineering is over my head, I give it to all of you to discuss.
Normally a system producing steam as the heat transfer agent will have a condenser with a condensate pump in the sump of the condenser. There is a negative pressure—not a back pressure as Jed has suggested. It is created by the condenser, thus the condenser creates the differential pressure driving the steam from the boiler to the heat sink. The feed pumps require a net positive suction head to operate properly without cavitation. This would normally be established by the condensate pump(s). If there were voids—air bubbles for example—in the feed line, the pumps would fail in short more than likely. Undesirable two-phase (air/water) feed flow to the reactor would create water hammer which could not be tolerated for long and be very noticeable to anyone near the steam producing plant. I find it hard to believe that Rossi would file suit without knowing for sure the steam system worked as I have suggested. It is telling that discovery has not brought such a schematic into the court record. Rossi’s lawyers stand to make a fortune on IH stringing out the court proceedings IMHO. Bob Cook