Am 11.12.2011 21:51, schrieb Mark Iverson-ZeroPoint:
Peter:
Thanks for taking time to RAISE the SNR!
What can we conclude from your analysis? Well, at first reading, it seems
reasonable, so it is at least helpful and might swing the 'accuracy meter' a
little over to Rossi's favor, however, I don't think its conclusive. But that
seems to be the norm in this case, that the only conclusive thing we can
conclude from what facts we do have, is that nothing is conclusive!
I APPLAUD your efforts here since what you did is EXACTLY what this discussion
group is for... tomorrow you could run some more test cases with this software
and come to the opposite conclusion, which I would also applaud! It's
unfortunate that some people on this list just don't understand that...
No. I can say you, that I did not test exactly the same model, because I
could not find this.
I tested if the orders of magnitude are possible with water and nothing
more and I confirmed it.
And no, I cannot do other tests. Say I use double the flow rate, then I
get an efficiency of 98% instead of 99%.
This doesnt matter. Im not interested in peanut counting and will not do
this.
Any test with similar magnitudes will give similar results. Why should I
repeat it? The result is plausible.
Only an experiment with the real thing could bring new findings, but i
doubt it.
-Mark
-----Original Message-----
From: Peter Heckert [mailto:peter.heck...@arcor.de]
Sent: Sunday, December 11, 2011 12:23 PM
To: vortex-l@eskimo.com
Subject: Re: [Vo]:The 6 Oct Rossi test heat exchanger model
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
