Yes, I do now think, the heat exchanger should do it in the horizontal
orientation.
I tested this as follows:
I downloaded and installed the heatexchanger calculation software from
SWEP.
It is unregistered and in demo mode. Registering is free bust must be
approved, so I have none.
In this mode the application supports only water-water applications, so
far I found.
So I inserted the primary water flow multiplied by 5, this gives about
the thermal energy of the steam.
Under this conditions I get secondary delta_t of 5° and the difference
between primary out and secondary in is about 0.5 degrees.
Lewan reported about 1 degree.
So if this exchanger can do it with water, then it should also be able
to do it with the equivalent energy in steam.
Apparently horizontal orientation is not a problem here.
BTW, the difference between primary out and secondary in was about 1
degrees in Lewans report.
If the primary delta_t was 100° then this means, the energetic
efficiency of the heatexchanger was 99 %.
This is pretty good and is probably because this exchanger is designed
for higher flow rates.
Best,
Peter
Am 11.12.2011 21:06, schrieb Alan Fletcher:
"Peter Heckert"<peter.heck...@arcor.de>
Here is a screenshot about condensing applications:
http://hphsite.de/vortex/SWEP-handbook.png
I think Rossi did it perfectly wrong and the exchanger cannot work in
horizontal orientation.
I think that the combination of using it horizontally AND with a low team
volume will work against Rossi -- any pooling of water in the HE which creates
a blockage would rapidly result in a temporary fall in the secondary output
temperature.
But which wins .. a blockage, or negative pressure from condensation?
Any negative pressure from condensation (vacuum relief valve) feeding back into the eCat
would result in a lower pressure and greater evaporation. Also, this argues against the
"input pump" blockage -- negative pressure would increase the flow.
All of which makes the 120C reading less understandable.
SWEP has also a software to calculate heatexchangers. ...
I'll try to give it a shot next week.
Maybe I'll also try to get the Elmer FEM system working again.
