U.S. patent application number 14/407452 was filed with the patent office on 2015-06-04 for ejector.
The applicant listed for this patent is ENDLESS SOLAR CORPORATION LTD. Invention is credited to Michael Dennis.
Application Number | 20150152885 14/407452 |
Document ID | / |
Family ID | 49757318 |
Filed Date | 2015-06-04 |
United States Patent
Application |
20150152885 |
Kind Code |
A1 |
Dennis; Michael |
June 4, 2015 |
EJECTOR
Abstract
The present disclosure provides an ejector that comprises a
housing portion and first and second fluid inlets. The ejector
further comprises a fluid outlet and a fluid nozzle that is
positioned in the housing and coupled to the first fluid inlet. The
fluid nozzle is arranged such that a first fluid that is received
by the first inlet at a first pressure PI has a second pressure P2
after passing through the fluid nozzle. The pressure P2 lower that
the pressure PI. The ejector also comprises a mixing region that is
arranged such that the first fluid when passing through the mixing
region draws a second fluid from the second fluid inlet such that
the first and second fluids mix. The ejector has an ejector
diffuser region that has a cross-sectional area that increases in
diameter in a direction towards the fluid outlet and is arranged
such that the mixture of the first and second fluid exits the
ejector through the fluid outlet with a third pressure. The ejector
is arranged such that a position of an outlet of the fluid nozzle
relative to the mixing region is adjusted dependent on PI, P2
and/or P3.
Inventors: |
Dennis; Michael; (Melbourne,
AU) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ENDLESS SOLAR CORPORATION LTD |
Melbourne, Victoria |
|
AU |
|
|
Family ID: |
49757318 |
Appl. No.: |
14/407452 |
Filed: |
April 16, 2013 |
PCT Filed: |
April 16, 2013 |
PCT NO: |
PCT/AU2013/000393 |
371 Date: |
December 11, 2014 |
Current U.S.
Class: |
239/398 |
Current CPC
Class: |
F04F 5/16 20130101; F04F
5/463 20130101; F25B 1/08 20130101; F04F 5/461 20130101 |
International
Class: |
F04F 5/46 20060101
F04F005/46 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 12, 2012 |
AU |
2012902457 |
Claims
1. An ejector comprising: a housing portion; a first fluid inlet
and a second fluid inlet; a fluid nozzle positioned in the housing
portion and coupled to the first fluid inlet, the fluid nozzle
being arranged such that a first fluid that has a fluid inlet
pressure P1 and is received by the first fluid inlet has a fluid
nozzle exit pressure after passing through the fluid nozzle, the
fluid nozzle exit pressure being lower than P1; a mixing region
arranged such that the first fluid when passing through the mixing
region draws a second fluid from the second fluid inlet such that
the first and second fluids mix; and a fluid outlet through which a
mixture of the first and second fluids exits the ejector; wherein
the ejector is arranged such that a position of an outlet of the
fluid nozzle relative to the mixing region is adjusted dependent on
at least one of P1 and/or and a pressure of the mixed first and
second fluids; and wherein the ejector comprises a conduit that is
arranged such that a portion of the conduit at or near the fluid
nozzle of the ejector has a pressure that is proportional to, or
substantially equals, a pressure of the mixed first and second
fluids and wherein the ejector is arranged such that the portion of
the conduit at or near the fluid nozzle of the ejector is isolated
from unmixed first and second fluids.
2. The ejector of claim 1 wherein the ejector is arranged such that
the position of an outlet of the fluid nozzle relative to the
mixing region is self-adjusted dependent on at least one of P1 and
a pressure of the mixed first and second fluids.
3. The ejector of claim 2 comprising a passive structure that is
arranged for self-adjusting of the position of the outlet of the
fluid nozzle.
4. The ejector of claim 1 comprising an actuator that is arranged
to adjust a position of the outlet of the fluid nozzle dependent on
at least one of P1 and a pressure of the mixed first and second
fluids.
5. The ejector of claim 1 wherein the first fluid has a second
pressure P2 after passing through the fluid nozzle, P2 being lower
than P1, and the mixture of the first and second fluid exits the
ejector with a third pressure P3; wherein the ejector is arranged
such that the position of the outlet of the fluid nozzle relative
to the mixing region is adjusting dependent on at least one of P1,
P2 and P3.
6. The ejector of claim 1 comprising an ejector diffuser having an
interior portion with a cross-sectional area that increases in
diameter in a direction towards the fluid outlet and is arranged
such that the mixture of the first and second fluid exits the
ejector through the fluid outlet with the third pressure P3.
7. The ejector of claim 1 comprising a converging region that is
provided in addition to the mixing region and that is positioned
such that the mixed first and second fluids converge before exiting
the ejector, the converging region having a cross-sectional area
that reduces in diameter in a direction towards the outlet of the
ejector.
8. The ejector of claim 1 wherein the mixing region is provided in
the form of a converging region and is arranged such that that the
first and second fluids converge during or after mixing and before
exiting the ejector, the converging region having a cross-sectional
area that reduces in diameter in a direction towards the outlet of
the ejector.
9. The ejector of claim 5 wherein the ejector is arranged such that
the outlet of the fluid nozzle moves away from the converging
region if the pressure P2 increases relative to another pressure
within the ejector.
10. The ejector of claim 5 wherein the ejector is arranged such
that the outlet of the fluid nozzle moves towards or into the
converging region if the pressure P3 increases relative to another
pressure within the ejector.
11. The ejector of claim 5 wherein a length by which the relative
position of the ejector is adjusted is largely proportional to a
change in P2 relative to another pressure in the ejector or P3
relative to another pressure in the ejector.
12. (canceled)
13. The ejector of claim 1 comprising a diaphragm that seals at
least a portion around the fluid nozzle.
14. The ejector of claim 13 wherein the diaphragm is arranged such
that the fluid nozzle or a portion thereof moves until the
diaphragm or another portion of the ejector provides a sufficient
reaction force for locating the fluid nozzle in an adjusted
position.
15. The ejector of claim 13 wherein the diaphragm surrounds at
least a portion of the fluid nozzle.
16. (canceled)
17. The ejector of claim 1 comprising a moveable wall portion that
is rigid and wherein the moveable wall portion is coupled to a
spring.
18. (canceled)
19. The ejector of claim 17 wherein the moveable wall portion is
directly or indirectly coupled to the fluid nozzle such that the
fluid nozzle or a portion thereof moves with the moveable wall
portion until the spring provides a sufficient reaction force for
locating the fluid nozzle in an adjusted position.
20. The ejector of claim 5 wherein the conduit is arranged such
that a portion of the conduit at or near the fluid nozzle of the
ejector has a pressure that is proportional to, or substantially
equals, the pressure P2 and wherein the ejector is arranged such
that the portion of the conduit at or near the fluid nozzle of the
ejector is isolated from unmixed first and second fluids.
21. The ejector of claim 20 wherein the conduit is arranged such
that a side portion of a diaphragm or a moveable wall portion is
exposed to a pressure that is proportional to, or approximately
equals, P2, wherein the ejector is arranged such that an increase
in P2 relative to another pressure within the ejector results in a
movement of the nozzle or portion thereof away from the mixing
region of the ejector.
22. The ejector of claim 5 wherein the conduit is arranged such
that a portion of the conduit at or near the fluid nozzle of the
ejector has a pressure that is proportional to, or substantially
equals, the pressure P3 and wherein the ejector is arranged such
that the portion of the conduit at or near the fluid nozzle of the
ejector is isolated from unmixed first and second fluids.
23. The ejector of claim 22 wherein the conduit is arranged such
that a side portion of a diaphragm or a moveable wall portion is
exposed to a pressure that is proportional to, or approximately
equals, P3, wherein the ejector is arranged such that an increase
in P3 relative to another pressure within the ejector results in a
movement of the nozzle or portion thereof into or towards the
mixing region of the ejector.
24. (canceled)
25. (canceled)
26. (canceled)
27. (canceled)
28. (canceled)
Description
FIELD OF THE INVENTION
[0001] The present invention relates to an ejector, such as an
ejector for a solar cooling system.
BACKGROUND OF THE INVENTION
[0002] The operation of conventional cooling systems, such as air
conditioning and refrigeration units, requires a considerable
amount of electrical energy. The electrical energy is often
generated using power stations that burn fossil fuel and
consequently emit undesirable pollutants and greenhouse gases.
[0003] Photovoltaic solar panels may be used to convert sunlight
into electrical energy that can be used to operate an electric
motor that drives a gas compressor of a cooling system. This may
reduce the need for fossil fuels, but the efficiency is relatively
low and the capital cost is relatively high.
[0004] Cooling systems that are operated using thermal solar energy
and have ejectors instead of corresponding conventional electrical
components are an alternative. However, an ejector is designed for
predetermined operation conditions (such as temperatures and
pressures of fluids) at which the ejector operates most
efficiently. Consequently, the ejector efficiency is reduced if the
ejector is not operated at the predetermined operation
conditions.
SUMMARY OF THE INVENTION
[0005] The present invention provides in a first aspect an ejector
comprising:
[0006] a housing portion;
[0007] a first fluid inlet and a second fluid inlet;
[0008] a fluid nozzle positioned in the housing portion and coupled
to the first fluid inlet, the fluid nozzle being arranged such that
a first fluid that has a fluid inlet pressure P1 and is received by
the first fluid inlet has a fluid nozzle exit pressure after
passing through the fluid nozzle, the fluid nozzle exit pressure
being lower than P1;
[0009] a mixing region arranged such that the first fluid when
passing through the mixing region draws a second fluid from the
second fluid inlet such that the first and second fluids mix;
and
[0010] a fluid outlet through which a mixture of the first and
second fluids exits the ejector;
[0011] wherein the ejector is arranged such that a position of an
outlet of the fluid nozzle relative to the mixing region is
adjusted dependent on P1 and/or a pressure of the mixed first and
second fluids.
[0012] The ejector may be arranged such that a position of the
outlet of the fluid nozzle relative to the mixing region is
self-adjusted dependent on P1 and/or a pressure of the mixed first
and second fluids. For example, the ejector may comprise a passive
structure that is arranged for self-adjusting of the position of
the outlet of the fluid nozzle. Alternatively, the ejector may also
comprise an actuator that is arranged to adjust a position of the
outlet of the fluid nozzle dependent on P1 and/or a pressure of the
mixed first and second fluids.
[0013] In one specific embodiment the ejector is arranged such that
the first fluid has a second pressure P2 after passing through the
fluid nozzle, P2 being lower than P1, and the mixture of the first
and second fluid exits the ejector with a third pressure P3;
[0014] wherein the ejector is arranged such that the position of
the outlet of the fluid nozzle relative to the mixing region is
adjusted dependent on P1, P2 and/or P3.
[0015] The ejector typically comprises an ejector diffuser having
an interior portion with a cross-sectional area that increases in
diameter in a direction towards the fluid outlet and is arranged
such that the mixture of the first and second fluid exits the
ejector through the fluid outlet with the third pressure P3.
[0016] The ejector may comprise a converging region that is
provided in addition to the mixing region and that is positioned
such that the mixed first and second fluids converge before exiting
the ejector, the converging region having a cross-sectional area
that reduces in diameter in a direction towards the outlet of the
ejector.
[0017] Alternatively, the mixing region may be provided in the form
of a converging region and may be arranged such that the first and
second fluids converge during or after mixing and before exiting
the ejector, the converging region having a cross-sectional area
that reduces in diameter in a direction towards the outlet of the
ejector.
[0018] The ejector is typically arranged such that the outlet of
the fluid nozzle, and typically the entire fluid nozzle, moves
towards or away from the converging region if the pressure of the
mixed first and second fluids (such as P2 or P3) changes relative
to another pressure within the ejector.
[0019] The ejector is typically arranged such that the outlet of
the fluid nozzle, and typically the entire fluid nozzle, moves away
from the converging region if P2 increases and towards or into the
converging region of P3 increases.
[0020] Embodiments of the present invention have significant
practical advantages. An ideal position of the fluid nozzle is
dependent on P1, P2 and/or P3. Consequently, the adjusting of the
relative position of the fluid nozzle may increase the ejector's
efficiency.
[0021] In one embodiment a length by which the relative position of
the ejector is adjusted is largely proportional to a change in
pressure of the mixed first and second fluids (such as P2 or P3)
relative to another pressure in the ejector.
[0022] The ejector may comprise a conduit that is arranged such
that a portion at or near the fluid nozzle of the ejector has a
pressure that is proportional to, or substantially equals, a
pressure of the mixed first and second fluids and wherein the
ejector is arranged such that that portion is isolated form unmixed
first and second fluids.
[0023] In one specific embodiment the ejector comprises a conduit
that is arranged such that a portion at or near the fluid nozzle of
the ejector has a pressure that is proportional to, or
substantially equals, the pressure P2 or P3 and wherein the ejector
is arranged such that that portion is isolated form unmixed first
and second fluids.
[0024] The ejector may comprise a diaphragm. The diaphragm may seal
at least a portion around the fluid nozzle. The ejector may be
arranged such that the fluid nozzle or a portion thereof moves
until the diaphragm and/or another portion of the ejector provides
a sufficient reaction force for locating the fluid nozzle in an
adjusted position.
[0025] The diaphragm may surround the fluid nozzle or may
alternatively only be positioned around a portion of the fluid
nozzle. The diaphragm typically comprises a suitable polymeric
material, such as a rubber material.
[0026] Alternatively, the ejector may comprise a moveable wall
portion, such as a moveable wall portion that is rigid and may be
coupled to a spring. The moveable wall portion may be coupled
directly or indirectly to the fluid nozzle such that the fluid
nozzle or a portion thereof moves with the moveable wall portion
until the spring provides a sufficient reaction force for locating
the fluid nozzle in an adjusted position.
[0027] The conduit may be arranged such that a side portion of the
diaphragm or the moveable wall portion is exposed to a pressure
that is proportional to, or approximately equals, the pressure of
the mixed first and second fluids, wherein the ejector may be
arranged such that an increase in the pressure of the mixed first
and second fluids relative to another pressure within the ejector
results in a movement of the nozzle or portion thereof relative to
the mixing region of the ejector.
[0028] The ejector typically is arranged such that an increase in
the pressure of the mixed first and second fluids relative to P3
results in a movement of the nozzle or portion thereof away from
the mixing region of the ejector. Further, the ejector typically is
arranged such that an decrease in the pressure of the mixed first
and second fluids relative to P3 results in a movement of the
nozzle or portion thereof into or towards the mixing region of the
ejector.
[0029] The present invention also provides a method of operating an
ejector, the method comprising:
[0030] receiving a first fluid having a first pressure;
[0031] receiving a second fluid;
[0032] directing the first fluid through a fluid nozzle of an
ejector such that the pressure of the first fluid is reduced to a
second pressure that is lower than the first pressure;
[0033] drawing the second fluid such that the second fluid mixes
with the first fluid in a mixing region; and
[0034] adjusting a position of an outlet of the fluid nozzle
relative to the mixing region of the ejector dependent on the
first, the second and/or an ejector exit pressure.
[0035] The step of adjusting a position of an outlet of the fluid
nozzle relative to the mixing region of the ejector may comprise
self-adjusting a position of an outlet of the fluid nozzle.
[0036] The mixing region may comprise, or may be provided in the
form of, the converging region.
[0037] The invention will be more fully understood from the
following description of specific embodiments of the invention. The
description is provided with reference to the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0038] FIG. 1 shows a schematic cross-sectional representation of
an ejector in accordance with an embodiment of the present
invention;
[0039] FIGS. 2 and 3 show perspective side views of the ejector in
accordance with an embodiment of the present invention;
[0040] FIG. 4 is a flow chart illustrating a method of operating an
ejector in accordance with an embodiment of the present invention;
and
[0041] FIG. 5 illustrates the operation of a heat pump including
the ejector in accordance with a specific embodiment of the present
invention.
DETAILED DESCRIPTION OF SPECIFIC EMBODIMENT
[0042] Referring initially to FIGS. 1 to 3, an ejector 100 in
accordance with an embodiment of the present invention is now
described. The ejector 100 may be operated to drive a heat pump of
a refrigeration cycle, in which case the ejector 100 may be used in
place of a conventional electric compressor, which will be
described in more details further below with reference to FIG.
5.
[0043] The ejector 100 has a body 102 that is generally
cylindrical. The body 102 comprises a nozzle housing 104 and a
diffuser portion 106. A fluid nozzle 108 is positioned in the
nozzle housing 104. The body 102 also comprises a mixing region
that is provided in the form of a converging region 110 and has a
cross-sectional area that reduces in a direction away from the
nozzle 108 and along an axis of the ejector 100. The diffuser
portion 106 further comprises a diverging region 118 that has a
cross-sectional area that increases in a direction away from the
nozzle 108 and along an axis of the ejector 100.
[0044] The ejector 100 has a first inlet 114 for receiving a first
fluid such as a refrigerant. Further, the ejector 100 has a second
inlet 116 for receiving a second fluid that may also be a
refrigerant. However, a person skilled in the art will appreciate
that the first and second fluids may be of various different types.
For example, the first and/or the second fluids may alternatively
be air, water, water vapour or refrigerant vapour or any other
suitable fluid. The first fluid 114 has a pressure P1 before
penetrating through the nozzle 108. The nozzle 108 has a diverging
region 109 through which the first fluid exits the nozzle 108 and
that results in an expansion of the first fluid, which further
expands a converging region 110 in which it has a reduced pressure
P2 (and the velocity of the first fluid is increased). In operation
of the ejector 100 the pressure P2 is sufficiently low such that
the second fluid is drawn through the second inlet 116 into the
mixing region of the converging region 110 to mix with the first
fluid. The mixture of the first and second fluids penetrates
through the converging region 110, a cylindrical region 112, the
diffusing region 118 and then exits the ejector 100 with a pressure
P3. Consequently, the ejector 100 functions as a pump or compressor
that increases the pressure of the second fluid.
[0045] The efficiency with which the ejector 100 pumps the second
fluid depends on various operation parameters including the
differences between the pressures P1, P2 and P3 for a given design
of the ejector 100. For example, for larger P3 relative to P1, the
nozzle 108 should be positioned further within the converging
region 110 than for smaller P3.
[0046] The nozzle 108 is movable along an axis of the ejector 100
such that positioning of the nozzle 108 as a function of P3, P2 and
P1 is possible. The nozzle 108 has in this embodiment a holder 121
in which the nozzle 108 slides along the axis of the ejector 100.
The ejector 100 also comprises a diaphragm 119 that surrounds the
nozzle 108 and seals the nozzle 108. Further, the ejector 100
comprises a conduit 122 that connects an end-portion of the
diffuser region 118 with a volume 123 behind the diaphragm 119.
Consequently, the volume 123 has a pressure that is in this
embodiment proportional to or is substantially equal to the
pressure P3 such that the pressure within the volume 123 pushes on
the diaphragm 119 and on the nozzle 108 to move the nozzle 108 to a
position at which the diaphragm 119 is sufficiently expanded such
that the diaphragm 119 provides a sufficient reaction force and the
nozzle is located in an adjustment position. The diaphragm 119 is
proportioned and arranged such that the adjustment position enables
substantially ideal or at least improved operating condition
dependent on P3 relative to other pressures of the ejector.
[0047] The nozzle holder 121 is provided with facility for damping
the motion of the nozzle 108 such that the nozzle 108 does not
change position with rapid fluctuations in pressures P1, P2 or P3.
Rapid fluctuations in pressure may arise from pressure waves or
shock waves in the ejector. Damping may be provided by friction
within the nozzle holder 121. This friction could be provided by
including a flexible ring 130 inside the nozzle holder 121.
[0048] A person skilled in the art will appreciate that the ejector
100 may alternatively be provided in different forms. For example,
the diaphragm 119 may only partially surround the nozzle 108 and a
remaining portion may be solid. Further, the diaphragm 119 may be
positioned at another position than indicated in FIG. 1. For
example, the diaphragm 119 may be located further within the
ejector 100 and along the nozzle 108. Further, the diaphragm 119
may be replaced with a suitable spring mechanism (including for
example a compression or expansion spring) that is arranged to
provide the reaction force for locating the nozzle in an adjustment
position. In this case the ejector 100 may or may not comprise the
diaphragm 119 and the pressure P3 may push against a rigid wall
(not shown) that is attached to the movable nozzle 108 to move the
nozzle 108 until the spring mechanism provides a sufficient
reaction force. In addition, the holder 116 may be provided in any
suitable form or may not be present. For example, the diaphragm 119
or the rigid wall may be arranged hold the nozzle 108. Further, an
end of the conduit 122 may be positioned near the outlet of the
nozzle 108 in the converging region 110 or in the cylindrical
region 112. Further, the ejector 100 may not necessarily comprise a
converging region. For example, the mixing region may be
incorporated in the diffusing region 118. In a further variation
the ejector may comprise an actuator that is arranged to adjust the
position of the fluid nozzle 108 as a function of P1, P2 or P3. For
example, the ejector may comprise a pressure sensor that senses a
change in P1, P2 or P3 and generates an output signal that is used
to control the actuator.
[0049] The diaphragm 119 is formed from a suitable polymeric
material that has a suitable flexibility, such as a suitable rubber
or a thin metallic material.
[0050] As mentioned above, first and second fluids may for example
be refrigerants, examples of which include hydrofluorocarbons,
hydrocarbons, carbon dioxide, ammonia, alcohols and water.
[0051] FIG. 4 illustrates a method of operating an ejector in
accordance with an embodiment of the present invention. Method 400
comprises steps 402 and 404 of receiving first and second fluids.
The method 400 also includes directing the first fluid through a
nozzle of an ejector such that the pressure of the first fluid is
reduced to a second pressure that is lower than the first pressure.
The method 400 further includes drawing the second fluid such that
the second fluid mixes with the first fluid that exited an outlet
of the nozzle (step 408) adjusting a position of the outlet of the
nozzle relative to a mixing region of the ejector dependent on the
first pressure and/or the a pressure of the mixed first and second
fluids to improve the efficiency of the ejector (step 410). Step
408 may comprise self-adjusting the position of the outlet of the
fluid nozzle.
[0052] Turning now to FIG. 5, the operation of the ejector 100 in a
heat pump refrigeration cycle is described in more detail.
[0053] The heat pump refrigeration cycle 500 comprises in this
example high and low temperature sub cycles (510 and 512
respectively). In the high temperature sub cycle 510, heat that is
transferred to the ejector 100 from the heat source (such as a
solar collector 504) through a vapour generator 514 causing
vaporisation of the ejector cycle working fluid in the generator
514 at a temperature slightly above the saturation temperature of
the refrigerant. Vapour then flows to the ejector 100 where it is
accelerated (and reduced in pressure) by the nozzle of the ejector
100.
[0054] A pump 516 may be required to generate a pressure difference
for the ejector 100 to operate, but since liquid is being
compressed, the power consumption is relatively small.
[0055] The fluids form generator 514 and evaporator 518 then mix in
the ejector 100 and the resultant fluid mixture undergoes a
compression shock. Thus, thermal compression replaces the
electrical compressor in a conventional heat pump. Further
compression takes place in the diffusing region of the ejector 100
such that a subsonic stream emerging from the ejector 100 then
flows into the condenser 520. As a position of the outlet of the
nozzle 108 of the ejector 100 is adjusted (such as self adjusted),
the ejector 100 provides for increased efficiency if operation
pressures change.
[0056] At the condenser 520, heat is rejected from the working
fluid (refrigerant) to the surroundings, resulting in a condensed
refrigerant liquid at the condenser 520 exit.
[0057] Liquid refrigerant leaving the condenser 520 is then divided
into two streams; one enters the evaporator 518 after a pressure
reduction through the expansion valve 522, the other is routed back
into the generator 514 after undergoing a pressure increase through
the refrigerant pump 516. The refrigerant fluid is evaporated in
the evaporator 518, absorbing heat from the environment that is
being cooled, and then it is entrained back into the ejector 100
completing the cycle.
[0058] There are a number of means to model the performance of an
ejector. Modelling may be based on thermodynamic compressible flow
theory with minor corrections for non-ideal behaviour, or
numerically derived using computational fluid dynamics and/or
finite element analysis. Modelling may be aided with reference to:
[0059] Eames, I W, Aphornratana, S & Haider, H 1995, `A
theoretical and experimental study of a small-scale steam jet
refrigerator`, International Journal of Refrigeration, vol.18,
no.6, pp. 378-86. [0060] Huang B., Petrenko V., Chang J, Lin C., Hu
S., `A combined cycle refrigeration system using ejector cooling
cycle as bottoming cycle`, International Journal of Refrigeration
24 (2001) 391-399. [0061] Zhu C., Wen L., Shock Circle method for
ejector performance evaluation, Energy Conversion and Management,
Vol 48, pp 2533-2541, 2007. [0062] Eames I., `A new prescription
for the design of supersonic jet pumps: the constant rate of
momentum change method`, Applied Thermal Engineering, Vol 22,
pp121-131, 2002.
[0063] Although the invention has been described with reference to
particular examples, it will be appreciated by those skilled in the
art that the invention may be embodied in many other forms. For
example, it will be appreciated by a person skilled in the art that
the ejector may be used for systems in which the inlet and exit
fluids are air, water or any other type of suitable fluid. Further,
at least one of the inlet fluids may be a gaseous medium and the
exit fluid may be a liquid. Alternatively, the at least one of the
inlet fluids may be a liquid medium and the exit fluid may be a
gaseous medium.
[0064] The reference that is being made to prior art publications
does not constitute that these prior art publications are part of
the common general knowledge of a person skilled in the art in
Australia or in another country.
* * * * *