On Sep 22, 2011, at 6:24 PM, Stephen A. Lawrence wrote:
On 11-09-22 08:40 PM, Horace Heffner wrote:
This is in regard to the 7 Sept. Lewan "Test of Energy Catalyzer"
report. URL:
http://www.nyteknik.se/incoming/article3264365.ece/BINARY/Report+E-
cat+test+September+7+%28pdf%29
http://tinyurl.com/3lqn52r
The report says: "Calibration peristaltic pump: [... ]
The pump looks to be the same yellow pump used before.
He gives the pump model, at the end of the paper:
* Peristaltic pump NSF
Model # CEP183-362N3
Serial # 060550065
Max output 12.0 liters/h
Max press 1.50 bar
Note particularly that he says it's a peristaltic pump, not a
displacement pump. Could that make the actual flow rate less
predictable?
Yes. If the flow is over 12 liters per hour the tubing the rollers
pinch to make the flow may have been exchanged for a larger ID tubing
than rated. The pump may have not been designed for that tubing.
If it is a pinched tubing peristaltic pump then it should be
sensitive to the pressure head it pumps against. If the outlet
pressure is too high the moving rollers simply can not squish the
tubing closed everywhere, so some back flow occurs through the moving
tubing pinch. Given this E-cat is designed to operate under
pressure a frequently sampled digital flow meter would be critical
to have. Note the max press rating is 1.5 bar and the E-cat was said
to be operating at 2 bar. That might explain the temperature rise
at the end. The flow stopped, and the thermometer, or at least the
tip of the thermometer well, was no longer exposed to water due to
dropping water level from boil off. The thermal wicking through the
probe well heated up the probe because the steam could not provide
the same degree of cooling (of the thermal wicking power) the water
could, so the recorded temperature started rising. This a reduced
input flow would also be consistent with the dropping overflow rate
measured over a 5 minute period in the report. As the pressure rises
the flow stops. If this is true, then the thing I do not understand
is why there was not a high pressure at the exit port of the E-cat.
Perhaps there are two compartments, the first operating under
pressure, slowly releasing flow into the second compartment, the
second compartment dumping at atmospheric pressure into the exit port.
Max flow rate of 12 l/h matches what Rizzi said, below (if I
understood what he meant).
I think you do. Maybe Mattia Rizzi will have some comments.
BTW I love this quote from the paper:
"Supposedly this Ecat needs 10
minutes of full power electric input after every 30 minutes of self
sustaining operation, for stability reasons, in the worst case."
So, to keep it from overheating, every 30 minutes you need to plug
it in again and heat it up some more.
Very strange.
If so it should produce 2 ml per click (stroke)? See Mattia
Rizzi's notes below. At 2 ml per stroke the device would have
been pumping at the rate of (2 ml/clk)/(1.225 s/clk) = 1.63 ml./s
= 97.8 ml/min = 5.87 kg/hr = 5.87 liters/hr.
The pump should be pumping at 1.63 gm/s vs the 4.39 gm/s it was
measured as pumping in the beginning?? Probably not.
That must be a different pump than the one to which Mattia Rizzi
refers below. The 15.8 liters per hour measured in initial
calibration is larger than the 12 liters per hour maximum Mattia
specifies for the 2 ml/stroke pump.
I any case, it appears we do not know what the actual input water
flow rate was during the latter part of the test. It would be
known from the sound track if we know the ml per stroke of the new
pump. It it is the old pump, then something is amiss in the
calibration to get a flow rate above the 100 stroke/min flow rate?
On Aug 25, 2011, at 9:32 AM, Mattia Rizzi wrote:
It’s a dosimetric pump.
In every stroke it can inject a maximum volume of 2ml of water
(volume is regulable)
It’s regulable from 20 to 100 strokes/minute.
So with a 100 strokes/min and a volume of 2ml, the pump is
running witha flow of 12 liter/h.
With 25 strokes/min, the pump is running up to 3liter/h (but it
can be lower since volume is adjustable).
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
