If the steam is condensed it would form a vacuum. DN40 sounds small to
me. Is that another Murray quote?
AA
On 9/2/2016 11:07 AM, Jed Rothwell wrote:
a.ashfield <[email protected] <mailto:[email protected]>> wrote:
Why do you say the pressure was higher than 0.0 bar when that is
what is reported?
Because you could not get this volume of steam or water to flow
through the heat exchanger if the pressure were 0.0 barG (1 atm). The
pumps have to push the water (or steam) and this raises the pressure
above 1 atm. Murray explained this in Exhibit 5:
The steam pressure was reported (for the entire period) to be 0
kPaG and the piping is DN40.
For steam to flow, a pressure differential is required to overcome
the losses in the pipe. Given the foregoing, this would require
that the pressure on the JMP side of the building was
significantly below atmospheric (vacuum) and that the steam would
flow at extraordinary velocity. But this was obviously not the
situation present at the location.
I and others noted this fact before reading this Exhibit.
(Let us assume this is meant to be 0.0 barG, and the 0.0 bar in
Rossi's data is a misprint.)
Also, because an earlier version of the report supposedly had higher
numbers, which were replaced with 0.0 bar in the later version. I saw
only the later version.
- Jed
