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Nissan Leaf Electric Car - How do they handle the Air Conditioning load? - Page 6

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Posted by sno on August 19, 2010, 2:17 am

On 8/18/2010 6:47 PM, sno wrote:

I just found an article on the device on nasa's web site...talks about
the bearing help....


Also it looks like his company has gotten pretty big you can buy them
all over the place...and a bunch of them are in use....some are BIG
ones....<grin>....it seems with so many of them in use that it would be
common knowledge if they were over unity.....and any number of people
would be studying them....

It does not look like they have any home size ones....but I imagine
their is not much demand for hot water/steam heat for the home.....

Here is link....


have fun...sno

have fun....sno

Correct Scientific Terminology:
Hypothesis - a guess as to why or how something occurs
Theory - a hypothesis that has been checked by enough experiments
  to be generally assumed to be true.
Law - a hypothesis that has been checked by enough experiments
  in enough different ways that it is assumed to be truer then a theory.
Note: nothing is proven in science, things are assumed to be true.

Posted by News on August 19, 2010, 6:24 am

An application I can see is instant on-demand water heating. I am not sure
what temperature ranges they operate at.  Griggs and the Yusmar units claim
no scale, so appears suitable for instant water heating. Obviously it would
need some control of some sort.  Maybe a closed loop with a plate heat
exchanger or ideally heating potable water directly.

I would like to get my hands on a small Russian unit and play about with it.
It is the most radical form of water heating introduced in decades.  Patents
may keep it from the mass market.  Or just plain ignorance or more likely
vested interest in existing technology.

They make a small neat package for sure - ideal in a domestic appliance.

Posted by News on August 19, 2010, 6:55 am

From the above:


It has become apparent that there are a great many possible
combinations of flow, pressure, temperature and piping
arrangements that could be tested.

Regarding the piping arrangements, there are three issues
that seem most important at this time.

1. It appears likely that the flow restriction should be
located not between the vortex chamber and the main outlet
tube (as we did in the tests described above) but at the far
end of the main outlet tube.

2.  The exact configuration of the bypass line is a mystery.
We are considering fabricating and installing a bypass line
that closely resembles those seen in various photographs of
the Potapov device.

3.  The arrangement of the circulation loop.  It has been
suggested that a closed loop (as opposed to our open system)
will result in dramatically different pumping requirements
which could significantly increase the energy delivered to
the Potapov device.  We are considering changing to such an

Regarding the pressure and flow requirements, the discovery
that we actually have a Yusmar-1 means that most of our
tests have been above the recommended flow rates.  We will
make the necessary adjustments in future tests. It is true
that our pressures never quite reach the 50 meter (71 psi)
upper figure given in the table of specifications but all of
our tests have been within the recommended pressure range
(46-71 psi).

There is now a Yusmar-2.  It is clear there were many configurations and
they were baffled at some parts of the setup. It looks like there is great
scope for more R&D to get the maximum setup (depending on application of
course) as there are many combinations of pressure,flow, etc.

Posted by vaughn on August 14, 2010, 8:31 pm

Perhaps, but what does that have to do with the Nissan Leaf?


Posted by danny burstein on August 14, 2010, 8:34 pm

Just about nothing, of course.

Sounds a bit like a Ranque-Hilsch vortex tube.

ah, wiki:


- except where it's different, of course.

Knowledge may be power, but communications is the key
[to foil spammers, my address has been double rot-13 encoded]

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