Application advantages could be as precious as intrinsic engine ones.
Innovative engine integration leads to economic and human benefits.
The Quasiturbine can further open new areas of unforeseen applications.
Matching Engine With Application
Engine efficiency is a large domain of activity which
extends far beyond engines. For example, the presence of an engine in a
vehicle adds accessories and weights which have to be carried by the power
of that same engine (the net usable power is reduced by the presence of
the engine itself). The presence of the engine is a necessity, but also a
factor of inefficiency. The ideal vehicle would not bother to have an
onboard engine! This is to show that not only engine efficiency is
important on the bench test, but must also reduce to the minimum its
self-inefficiency in application.
It would be worthless to have a 70% efficiency gas
engine for mobile application, if such a 30 HP engine would weight 3 tons!
However, this could still be valuable for stationary applications. Engine
needs to be properly match in all application, and the most versatile wins!
Quasiturbine engines are simpler, and contain no
gears and far fewer moving parts. For instance, because intake and exhaust
are open ports into the walls of the rotor housing, there
are no valve or valve trains. This simplicity, small size and weight allow
also for a
saving in construction costs. Because its center of mass is immobile
during rotation, the Quasiturbine has very little or no
vibration. Due to the absence of dead time between strokes, the
Quasiturbine can be driven by compressed air or steam without synchronized
valve, and also with liquid as hydraulic motor or pump. Other advantages include high torque at low rpm, combustion of hydrogen, and
compatibility with detonation mode in Quasiturbine with carriages.
Pneumatic and steam optimum efficiency independent of the rpm and the load
is also quite a unique characteristic.
Engine displacement versus the Total engine volume
4 strokes engine type
15 to 20
5 to 7
1.3 to 2
The Quasiturbine is a positive
with a total displacement almost equal to the engine volume
(Imagine one day, a 3 liters car engine into a
3 liters volume!)
Not all engines are or need to be equally efficient.
A military strategic application may require an engine lifetime to be only
few seconds, and not care about efficiency. At the opposite, a space craft
Stirling engine may command for extremely high efficiency. Generally,
economic considerations balance the value of the engine with the value of
the energy flowing into it over its lifetime. This command substantial
efficiency for automotive or stationary applications having high use
factor over years.
Since the efficiency is closely tied to the
application and cannot be fully appreciate outside a specific
integration, the efficiency criteria is not always obvious to apply. For
example, one of the paradox of today hybrid vehicle concept is: How much
additional equipment can be added to a vehicle to reach the point where this
equipment has worthless net saving effect in actual application? In many
applications, torque, rpm, or power modulation capability become a
Engine Exhaust Heat Recovery:
By placing a hot Quasiturbine into or around an engine exhaust pipe, and
injecting pressurized hot water (steam keep in the liquid state for better
heat transfer), some heat can be recovered into mechanical energy.
Stirling and short steam circuit Quasiturbine could do similarly!
High Torque Versatility
Several engines may match in power, but not in rpm or
torque. Gas or steam turbines may rotate over 10,000 rpm, but if the user
needs the power at 900 rpm, an other kind of engine may be more suitable?
Human need is generally low rpm. For example, a car
wheel on the highway turns around 800 to 1400 rpm. Gearbox are used to
match torque and rpm with engine, but they are costly, sensitive, heavy,
energy consuming and maintenance intensive... There is a strong demand for
high torque at low rpm, a condition not easy to produce directly within an
engine. The Quasiturbine is exceptional in this regard.
Power Modulation capability
Contrary to the conventional turbine, pneumatic and
steam Quasiturbine optimum efficiency is optimum in a large gap of rpm and
load, which is also a quite unique characteristic highly in demand in the
world of engine. For solar steam plant for example, the same Quasiturbine
driven generator can work efficiently at peak power, as well as at
overnight idle power, or at variable sunny conditions!
Light and Compact
Airplanes. Nowhere a high specific engine power is so
welcome. Zero vibration is also a great advantage to reduce fatigue and
instrument failure in airplanes. Compact engine also means a reduce drag
cross-section and faster planes. The Quasiturbine is also most suitable for
portable tools, generator...
Vehicle also benefits from the light and compact
characteristics of the Quasiturbine, which permits new innovative layouts
and power train setup (Because the Quasiturbine can run in all
orientation, it could be mounted straight on a differential shaft oriented
upward, or better, concentric to the wheel shaft because the Quasiturbine
center is free of any mechanism).
Where environmental conditions command a zero
pollution engine, the pneumatic and steam Quasiturbine can provide a
practical solution, like inside-shop, or in underground mines.
Vibration is an important environmental factor for
hand tools like chainsaws, which the Quasiturbine can reduce to zero.
Multi-fuel is also an environmental consideration in
countries where gas and diesel is not currently available, or where imports
are out of price.
Because the Quasiturbine center is free and
available, lets insert a jet boat propeller inside of it, and because the
Quasiturbine has no oil pan, it could be submerged to provide direct
underwater boat or recreational propulsion.
A small submarine innovative pneumatic Quasiturbine
concept could have a cabin free of any propulsion component, where
the air tank is droppable below, the propulsion Quasiturbine is at the
rear, and the air exhaust of the Quasiturbine goes into the cabin to
be inhaled by the crew.
The pneumatic engine does not show any vibration on the shaft. As an example, a chainsaw with a pneumatic engine
(running from pressure air bottle regulated to less than 100 psi)
allows for a non combustible "all condition" running unit for the fireman and
national safety teams.
It does run in heavy smoke or under water as well. Exhaust can even be
inhaled by the fireman ! A must for all civil defense organization ...
Because the pneumatic and steam Quasiturbine have 2
distinct flow circuits, one can be used as motor by injecting pressure air
or steam, while the other is free for pumping whatever gas or liquid
present at the intake. This is a turbo-pump configuration where the motor
and the pump are a one perfectly integrated unit. In this mode, the
Quasiturbine center is left empty as no shaft is necessary...
Fuel cell needs good cooling. Why not use liquid
nitrogen which could evaporate and expands into a pressure exchanger and
feed a pneumatic Quasiturbine to produce additional electricity? This way,
the Quasiturbine and the fuel cell make the perfect marriage...
Hybrid Quasiturbine-Fan (or Quasiturbine-Jet) offers
potential for no temperature limit in the jet nozzle! Considering the high
power density, the low cross section area and the exceptional intake
characteristics of the Quasiturbine, it is reasonable to expect to
conceive new airplane engines.
Out of space short steam circuit or Stirling
Quasiturbine can be made in the shape of a large and thin sandwich like
disk, which oriented toward the hot sun can provide power by temperature
Engine Exhaust Heat Recovery: By placing a hot
Quasiturbine into or around an engine exhaust pipe, and injecting
pressurized hot water (steam keep in the liquid state for better heat
transfer), some heat can be recovered into mechanical energy. Stirling and
short steam circuit Quasiturbine could do similarly!
Much more innovative concepts flow from the