STELTH OPERATING PRINCIPLE AND
MANUFACTURING RATIONALE
STELTH, THE WORLDS LOWEST MANUFACTURING AND RUNNING
COST PUMP VERSE THE DAB PUMP, MODEL K14/400 M, 2.5 HP. DAB IS
FOR GENERAL PUMPING AND IS SOLD WORLDWIDE.
HOW IS THIS DONE?
NEW FLUID TECHNOLOGY HAS ALREADY HAD PUMPS
MANUFACTURED IN CHINA !
SIMPLE DIAGRAM SHOWS HOW THE “STELTH”
WATER VORTEX MAKES THIS PUMP SO
DIFFERENT
HIGH EFFICIENCY AND LOW NOISE IS NEEDED
NOW!
• GOVERNMENTS ARE LEGISLATING NOW OVER
ENERGY EFFICIENCY OF SWIMMING POOL PUMPS.
• AUSTRALIA HAS INTRODUCED ENERGY
EFFICIENCY STARS ON POOL AND SPA PUMPS
TAKING EFFECT IN OCTOBER 2011.
• CALIFORNIA NOW REQUIRES TWO OR MORE
SPEED POOL PUMPS AND OTHER U.S. STATES
ARE READY TO FOLLOW.
AUSTRALIA’S ENERGY STARS AND NOISE (dBA) LEGALLY
REQUIRED FROM OCTOBER THIS YEAR
• ONLY STELTH WILL BE AWARDED 9 STARS
• MOST PUMPS WILL GET 7 STARS.
• A PUMP OF 9 STARS IS 56% MORE EFFICIENT THAN ONE OF 7
STARS (IT COSTS 56% LESS MONEY TO RUN)
THE MAIN PUMPING PROBLEM FOR THE WORLD!
• LEGISLATION GIVES PUMP MANUFACTURERS A PROBLEM!
• THEY HAVE ONLY THE CONVENTIONAL OLD TECHNOLOGY
“WET END” FOR A PUMP.
• THEY MUST EMPLOY HIGH EFFICIENCY, VARIABLE OR MULTI
SPEED BLDC MOTORS TO LIFT PERFORMANCE.
• BUT ONLY A REAL BREAKTHROUGH IN THE PUMP “WET
END” WILL MAKE ONE BRAND STAND ABOVE THE REST AND
REDUCE COST OF PUMPING WORLDWIDE.
WHAT ARE THE MAIN BENEFITS OF THE STELTH
“BREAKTHROUGH”?
• LOW COST TO RUN
• LOW COST MANUFACTURING
• VERY LOW NOISE
• SIMPLE FIELD SERVICING
WHAT CHARACTERISTICS ARE NEEDED?
HIGH EFFICIENCY AT:
• HIGH SPEED
• MEDIUM SPEED
• VERY LOW SPEED
• IN CHANGING SYSTEM RESISTANCE (FILTERS OR
AUTOMOTIVE COOLING)
THE BREAKTHROUGH HAS BEEN MADE. THE “LITERS PER KILOWATT
HOUR” OF THE STELTH OVER MAJOR BRAND PUMP AT LOW SPEED
OF 600 RPM.
CHART BELOW SHOWS ABOUT 57% MORE LITERS PER KW/HR AT 20kpa FOR THE
STELTH AND AT 15 kpa ABOUT 42% MORE THAN THE MAJOR BRAND PUMP
•
DATA FROM MANUFACTURERS OWN TEST STAND IN USA
1440 RPM IS HALF SPEED FOR A TWO SPEED PUMP AT 50 CYCLES.
CALIFORNIA LEGISLATES 2 OR MORE SPEEDS FOR POOL PUMPS. AT
40 kpa STELTH PUMPS 23% MORE LITERS PER KW/HR THAN MAJOR
BRAND PUMP AND AT 30 kpa PUMPS 14.7% MORE.
•
DATA FROM MAJOR BRAND`S OWN TEST STAND IN USA
STELTH ADVANTAGE OVER PENTAIR “INTELLIFLOW”.
Osbourne Reynolds (Reynolds Number), with
respect to vortex rings, once remarked that nature
preferred rolling over gliding. “Vortex Flow In Nature
and Technology” page 91 Hans Lugt 1995.
VORTICITY IS ONE OF THE ENERGY
CONSERVATION LAWS
• FEYNMAN AND LANDAU ESTABLISHED THAT ONLY MAN
MADE SUPERFLUID HELIUM - 4 BELOW 2.1 DEGREE
KELVIN IS IRROTATIONAL.
• OTHERWISE EVERYTHING IS ROTATIONAL, ELECTRONS
TO GALAXIES!
• OUR PUMP IMPELLER SPINS THE WATER WITHIN A
CIRCULAR PUMP CASE REDUCING LOSSES.
• WE ELIMINATE THE DIFFUSING PASSAGES ESSENTIAL
FOR CONVENTIONAL PUMPS TO GENERATE THEIR STATIC
PRESSURE.
NEW FLUID HAS MANY YEARS EXPERIENCE GENERATING VORTICITY FOR
INDUSTRIAL AND ENTERTAINMENT APPLICATIONS.
CLICK
HOW “SOLID BODY” VORTICITY WORKS IN THE
STELTH PUMP.
•
•
RED ARROW SHOWS ROTATIONAL DIRECTION OF THE IMPELLER AND WATER.
LARGE DIAMETER DRUM (SPIGOT), INTEGRAL WITH THE IMPELLER, DRAGS WATER
AROUND ALONG WITH IMPELLER SURFACES AND IMPELLER TANGENTIAL WATER
INJECTION.
SOLID BODY
MEANS
WATER
GOES
FASTER
HERE
THAN
HERE
Isaac Newton described how a rotating parallel sided bucket induced water to
spin up to the rpm of the bucket.
SNAP IN INSERTS CHANGE PUMPING CAPACITY
2 HP
1.5 HP
1 HP
¾ HP
IN A “SOLID BODY VORTEX” ALL THE WATER MOLECULES LINE UP
LIKE WHEEL SPOKES AS WELL AS IN THE AXIAL DIRECTION. DIAGRAMS
FROM “VORTEX FLOW IN NATURE AND TECHNOLOGY” HANS LUGT, 1995
NO SOLID BODY VORTEX CAN FORM IN
THIS CHAMBER
TWO KINDS OF VORTICITY
•
NEGATIVE PRESSURE VORTICES IN CIRCULAR CONTAINERS
RESULT IN SAME MOLECULAR SPEED (MOLECULES SHEAR AS IN
DYSON BAGLESS VAC).
•
POSITIVE PRESSURE VORTICES IN CIRCULAR CONTAINERS
RESULT IN DIFFERENT MOLECULE SPEED (NO SHEAR AS IN
STELTH).
THIS IMPORTANT DISTINCTION BETWEEN THE KINDS OF
VORTICES HAS NOT BEEN UNDERSTOOD BY
MANUFACTURERS OF “VORTEX” PUMPS! SEE NEXT SLIDE
FOR THIS
EXISTING CONVENTIONAL “VORTEX” PUMPS
•
CHAMBER INTERNAL CORNERS ARE NOT SQUARE SO NO SOLID BODY
VORTEX CAN FORM.
•
IMPELLER IS RECESSED AND NO WATER IS INTRODUCED BY THE
IMPELLER.
THESE PUMP SUSPENDED SOLIDS AND ARE OF LOW EFFICIENCY.
•
IMPELLER
INLET
ITT IS THE WORLDS LARGEST PUMP COMPANY.
ITT TEST RESULTS: STELTH V RULE MATE 2000 BILGE PUMP
A HIGHER PRESSURE VERSION OF THE STELTH V RULE “MATE 2000”
BELOW IS THE ITT RULE “MATE” 2000 BILGE PUMP AND THE STELTH
BILGE PUMP. THE STELTH HAS RECENTLY BEEN REDUCED FURTHER
IN HEIGHT: SEE NEXT SLIDE
THIS LATEST SMALLER STELTH IS FOR AUTOMOTIVE
ENGINE COOLING AND FOR BILGE PUMPS. IT IS VERY
EASY TO MANUFACTURE
THIS CHART PRODUCED BY THE UNIVERSITY OF ADELAIDE, AUSTRALIA.
THEIR TEST RIG MEASURES ONLY THE EFFICIENCY OF THE PUMP AND NOT THE
PUMP/MOTOR COMBINATION. A TORQUE TRANSDUCER MEASURES SHAFT POWER ONLY
3,500 RPM BELOW.
NEXT TESTS WITH THE SMALLER STELTH, UP TO 8,000 RPM
ITT ALSO TESTED BACK TO BACK THE DAVIES CRAIG EWP 115
AUTOMOTIVE ENGINE COOLING PUMP AGAINST THE SMALLER A
VERSION STELTH.
TARGET
STELTH PERFORMANCE SUMMARY
• THE WATER VORTEX PERIPHERY GOES FASTER THAN
THE IMPELLER PERIPHERY AND CONCENTRATES THE
PRESSURE THERE.
• MUCH QUIETER--- NO WATER WAKE COLLISIONS--- NO
DIFFUSERS.
• THE JETFAN ELECTRIC MOTOR COOLING FAN REDUCES
NOISE EVEN FURTHER.
WHY IS THE STELTH MUCH QUIETER?
• SIMPLY BECAUSE IT HAS NO DIFFUSER.
• POOL PUMPs ARE 62 dBA to 82dBA. 78dBA IS
AVERAGE 330 LITERS/MINUTE
• STELTH CAN PUMP 540 LITERS PER MIN AT 2880
RPM FOR A NOISE LEVEL OF 52.8 dBA.
• NOISE LEVEL IS DOUBLED EACH 3 dBA!
SIMPLE IMPELLER ASSEMBLY ELIMINATES ONE
MANUFACTURING STEP AND ULTRASONIC WELDING
SECURING
BOLT
NO ULTRASONIC
WELDING
MOTOR SHAFT
THE STELTH HAS NO DIFFUSER
•
THE STELTH IMPELLER BACK IS THE SAME FOR ALL MODELS. ONLY THE
IMPELLER CAP WITH DIFFERENT BLADE LENGTHS IS CHANGED TO VARY
THE PASSAGE WIDTH.
CHANGE ONLY CAPS
DON’T CHANGE BACKS
NARROW BLADE IMPELLER
WIDE BLADE IMPELLER
NO LABYRINTH SEAL (EASIER MANUFACTURING TOLERANCES)
NO LABYRINTH SEAL
NEGATIVE PRESSURE
HERE
NO EXPENSIVE MEHANICAL SEAL
LOW COST O RING SHAFT SEAL?
INTEGRATED WITH LEAF BASKET
Whats does NFT`s future hold?
• HYDROXYL RADICALS
NFT is currently close to proving up the technology to
• Sterilise water without the need for chemicals! Imagine
pools/spas and municipal water without salt or chlorine.
The inherent natural ability of tailored SS Pumps to
produce large qtys of Hydroxyl radicals is the key.
MULTIPLE APPLICATIONS
•
INDUSTRIAL
•
AGRICULTURE / RURAL
•
AUTOMOTIVE INCLUDING AERONAUTICAL
•
AEROSPACE
•
MARINE: BILGE PUMPS AND GENERAL PUMPING
•
POOLS / SPAS
•
SMALL, LIGHTWEIGHT
•
MILITARY, VERY QUIET WITH HIGH EFFICIENCY (USE LESS FUEL /
ELECTRICITY)
VERSION OF STELTH WITH COOLING AIR DUCTED AROUND
THE MOTOR