Gas thermodynamic recuperator

Abstract

The application discloses a gas heat power recycler, which comprises a cylindrical recycler shell with an air inlet and an air outlet arranged at two ends respectively, and a heat conduction support connected in the recycler shell; the heat conduction support comprises a conical hollow structure with a gradually increased cross section along a hot air flow direction; a spiral coil is wound on the heat conduction support, and two ends of the spiral coil are a high-pressure gas inlet and a high-pressure gas outlet respectively. The gas heat power recycler can quickly absorb the heat power of target hot air and reduce the temperature of the target hot air.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fluid heat exchange, in particular to a gas heat power recovery device. BACKGROUND

[0002] There are many kinds of existing aircraft engines according to different classification methods, and the mainstream is jet engine. The technical principle of the jet engine is basically to drive the air to be sprayed back to push the aircraft forward by heat power. The most mainstream civil aircraft engine is a turbofan jet engine, the bypass ratio of which is generally more than 5, the flight speed is generally below 1000Km / h, and the engine has the advantages of good engine efficiency, long service life, low running noise, low tail jet temperature, etc. The high-speed aircraft engine is a turbojet engine, the bypass ratio of which is 0, the flight speed is generally above 1000Km / h, but it has the disadvantages of low engine efficiency, short service life, large running noise, and high tail jet temperature.

[0003] The existing jet engine has the following disadvantages:

[0004] 1) A dedicated cooling system is needed to cool the engine, which increases the complexity and manufacturing cost of the equipment, and also provides additional power for the cooling system.

[0005] 2) The operating temperature of the core components is very high, which requires high-quality materials, shortens the service life of the engine, and increases the manufacturing and maintenance costs.

[0006] 3) Only the hot-press type power cabin works: in order to increase the speed, the power cabin is increased to two or even three, which results in the continuous increase of the operating temperature and pressure of the core components.

[0007] 4) High internal jet temperature: the average tail jet temperature of the turbofan jet engine is about 900℃, and the average tail jet temperature of the turbojet engine is about 1200℃, which is a great loss of heat power.

[0008] In order to solve the above problems, the inventor designs an aircraft heat cycle power system, which uses high-pressure air as a heat exchange carrier, and uses stored high-pressure air as the main source and an electric motor as the auxiliary source to drive the air compression system to operate. By introducing high-pressure air into the jet engine, the cooling and heat power recovery and recycling functions of the engine are realized. At the end of the heat power recovery, the temperature of the air is still high, and if it is directly discharged outside the system, it will still cause a large amount of energy waste. The recovery efficiency of the traditional heat power recovery structure is poor. Therefore, it is necessary to redesign a gas heat power recovery device. SUMMARY

[0009] The purpose of the present application is to provide a gas heat power recovery device which can quickly absorb the heat power of the target hot gas and reduce the temperature of the target hot gas, and can be widely used in scenes where heat energy recovery and discharge temperature reduction are required.

[0010] To achieve the above object, the application provides a gas heat power collector, which comprises a collector shell in a cylindrical shape and provided with an air inlet and an air outlet at two ends respectively, and a heat conduction support connected in the collector shell; the heat conduction support comprises a conical hollow structure with a gradually increasing cross section along the direction of hot air flow; a spiral coil is wound on the heat conduction support, and the two ends of the spiral coil are a high-pressure gas inlet and a high-pressure gas outlet respectively.

[0011] As a further improvement of the application, the cross section size of the air inlet is smaller than the cross sections of both the middle part of the inner cavity of the collector shell and the air outlet.

[0012] As a further improvement of the application, the conical hollow structure comprises a conical heat conduction cylinder and a heat conduction rib plate, the conical heat conduction cylinder is provided with a plurality of openings on the side wall, and the heat conduction rib plate is located on the inner side of the conical heat conduction cylinder; the front and rear ends of the conical heat conduction cylinder are communicated; the heat conduction rib plate and the openings of the conical heat conduction cylinder form a wind guide channel.

[0013] As a further improvement of the application, the spiral coil comprises a first spiral coil, and the first spiral coil is wound on the outer side of the conical heat conduction cylinder and has a gap between adjacent two turns of the tube body.

[0014] As a further improvement of the application, the front and rear ends of the conical heat conduction cylinder are respectively provided with a front flow guide baffle and a rear flow guide baffle; the outer edge size of the front flow guide baffle is smaller than the front end opening of the conical heat conduction cylinder, and the outer edge size of the rear flow guide baffle is smaller than the rear end opening of the conical heat conduction cylinder.

[0015] As a further improvement of the application, the heat conduction support further comprises a support connected between the conical hollow structure and the collector shell, and the spiral coil comprises a second spiral coil, which is wound on the support and has a gap between adjacent two turns of the tube body.

[0016] As a further improvement of the application, the high-pressure gas inlet is close to the air outlet side of the collector shell, and the high-pressure gas outlet is close to the air inlet side of the collector shell.

[0017] Advantages

[0018] Compared with the prior art, the gas heat power collector of the application has the following advantages:

[0019] 1. The spiral coil of high-pressure air is used as the heat power collection carrier to realize small pipe diameter and large capacity. The spiral coil is wound on the heat conduction support in the collector shell, the cross section of the conical hollow structure of the heat conduction support gradually increases along the direction of hot air flow, which is beneficial to increase the area of the spiral coil meeting the hot air, the high-pressure air in the spiral coil can more fully exchange heat with the hot air passing through the collector shell, and the heat recovery is more sufficient.

[0020] 2、The conical hollow structure of the heat conducting support can increase the heat conducting area through the hollow structure, such as the openings of the conical heat conducting cylinder and the heat conducting ribs. The heat of the hot air entering the recovery device shell can be conducted to the spiral coil not only directly but also through the heat conducting support. The combination of the conical hollow structure and the spiral coil can block the hot air to some extent, increase the time of the hot air staying in the recovery device shell, and thus make the heat recovery more sufficient.

[0021] 3、The caliber of the spiral coil is larger than that of the high-pressure gas inlet, so that the high-pressure gas has a pressure release effect when flowing into the gas heat power recovery device through the high-pressure gas inlet and becomes flowing high-pressure cold gas. The high-pressure cold gas in the spiral coil and the hot gas flowing through the gas heat power recovery device form a large temperature difference, greatly improving the heat exchange efficiency. The temperature of the high-pressure cold gas in the spiral coil at the outlet is obviously higher than that at the inlet after heat exchange in the gas heat power recovery device, and the pressure remains unchanged or only slightly decreases, ensuring that the subsequent high-pressure cold gas can normally enter the jet engine to cool the engine.

[0022] 4、The front and rear flow guide baffles are arranged to avoid the hot air directly passing through the middle part of the conical hollow structure, so that the hot air is forced to enter the recovery device shell after bypassing the flow guide baffles, ensuring that the hot air entering the recovery device shell can fully exchange heat with the high-pressure air in the spiral coil.

[0023] 5、The high-pressure gas inlet is arranged at the air outlet side of the recovery device shell, and the high-pressure gas outlet is arranged at the air inlet side of the recovery device shell, so that the temperature of the high-pressure gas outlet can be higher than the temperature of the air outlet of the gas heat power recovery device with a high probability.

[0024] The present application will become more apparent from the following description when taken in conjunction with the accompanying drawings, which serve to explain embodiments thereof. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0026] Figure 1 is a top view of the gas heat power recovery device;

[0027] Figure 2 is a left view of the gas heat power recovery device;

[0028] Figure 3Right view of the gas heat power recovery device;

[0029] Figure 4 Sectional view of the gas heat power recovery device;

[0030] Figure 5 Top view of the heat conduction bracket;

[0031] Figure 6 Partial sectional view of the heat conduction bracket;

[0032] Figure 7 Left view of the heat conduction bracket;

[0033] Figure 8 Right view of the heat conduction bracket;

[0034] Figure 9 Hot air line diagram through the gas heat power recovery device. DETAILED DESCRIPTION

[0035] Embodiments of the present application will now be described with reference to the accompanying drawings.

[0036] Embodiments

[0037] A specific embodiment of the present application is shown in Figures 1 to 9 A gas heat power recovery device 1 includes a recovery device housing 11 in the shape of a cylinder with an air inlet 111 and an air outlet 112 at opposite ends, and a heat conduction bracket 13 connected inside the recovery device housing 11. The heat conduction bracket 13 includes a tapered hollow structure with a cross section that gradually increases in the direction of hot air flow. A spiral coil 12 is wound around the heat conduction bracket 13, with a high-pressure gas inlet 123 and a high-pressure gas outlet 124 at opposite ends of the spiral coil 12. In this embodiment, the outer surface of the tapered hollow structure is in the shape of a conical surface.

[0038] The cross-sectional size of the air inlet 111 is smaller than the cross-sectional size of both the middle part of the inner cavity of the recovery device housing 11 and the air outlet 112.

[0039] The tapered hollow structure includes a tapered heat conduction cylinder 132 with a plurality of openings 1321 in the side wall, and a heat conduction rib plate 133 located inside the tapered heat conduction cylinder 132 and fixedly connected thereto. The tapered heat conduction cylinder 132 is connected at both ends. The heat conduction rib plate 133 and the openings 1321 of the tapered heat conduction cylinder 132 form an air guide channel. Specifically, the heat conduction rib plate 133 includes a plurality of rib plate structures distributed radially around the center, with the rib plate structures parallel to the center line of the recovery device housing 11, and the adjacent rib plate structures and the openings 1321 of the tapered heat conduction cylinder 132 forming the air guide channel. The openings 1321 of the tapered heat conduction cylinder 132 are a plurality of strip-shaped openings 1321 arranged around the center line of the tapered heat conduction cylinder 132.

[0040] The spiral coil 12 comprises a first spiral coil 121, which is wound outside the conical heat-conducting cylinder 132 with a gap between adjacent two turns of the first spiral coil 121. The helix of the first spiral coil 121 is a three-dimensional conical helix.

[0041] The conical heat-conducting cylinder 132 is provided with a front flow baffle 134 and a rear flow baffle 135 at the front end and the rear end respectively. The outer edge of the front flow baffle 134 is smaller than the front end opening of the conical heat-conducting cylinder 132, and the outer edge of the rear flow baffle 135 is smaller than the rear end opening of the conical heat-conducting cylinder 132.

[0042] The heat-conducting bracket 13 further comprises a bracket 131 connected between the conical hollow structure and the recycling device shell 11. The bracket 131 is composed of a cross-shaped square tube, and the end thereof is connected with the recycling device shell 11 through a screw. The bracket 131 comprises two brackets respectively located at the front side and the rear side of the conical hollow structure, and the front end and the rear end of the conical heat-conducting cylinder 132 are connected with the bracket 131 located at the front side and the bracket 131 located at the rear side respectively. The front flow baffle 134 and the rear flow baffle 135 are fixed on the bracket 131 located at the front side and the bracket 131 located at the rear side respectively.

[0043] The spiral coil 12 comprises a second spiral coil 122, which is wound on the bracket 131 with a gap between adjacent two turns of the second spiral coil 122. The helix of the second spiral coil 122 is a two-dimensional helix, and the plane of the two-dimensional helix is perpendicular to the center line of the recycling device shell 11.

[0044] When the air enters the recycling device shell 11 from the air inlet 111, the air first passes through the bracket 131 and the second spiral coil 122 at the front end, and then part of the air passes through the space between the outer wall of the front end of the conical heat-conducting cylinder 132 and the inner wall of the recycling device shell 11, and the other part of the air bypasses the front flow baffle 134 and enters the space between the inner wall of the conical heat-conducting cylinder 132 and the heat-conducting rib plate 133. The air continues to flow backward, part of the air passes out through the space between the outer wall of the rear end of the conical heat-conducting cylinder 132 and the inner wall of the recycling device shell 11, and the other part of the air bypasses the rear flow baffle 135 and passes out from the space between the outer edge of the rear flow baffle 135 and the inner wall of the rear end of the conical heat-conducting cylinder 132.

[0045] The high-pressure gas inlet 123 is close to the air outlet 112 side of the recycling device shell 11, and the high-pressure gas outlet 124 is close to the air inlet 111 side of the recycling device shell 11.

[0046] The caliber of the spiral coil 12 is larger than that of the high-pressure gas inlet 123, so that the high-pressure gas has a pressure relief effect when flowing into the gas thermodynamic regenerator 1 through the high-pressure gas inlet 123, becoming flowing high-pressure cold gas. The high-pressure cold gas in the spiral coil 12 has a huge temperature difference with the hot gas flowing through the gas thermodynamic regenerator 1, greatly improving the heat exchange efficiency. The high-pressure cold gas in the spiral coil 12 is heated by heat exchange in the gas thermodynamic regenerator 1, so that the temperature of the outlet is obviously higher than that of the inlet, and the pressure is unchanged or only slightly reduced, ensuring that it can normally enter the jet engine for cooling the engine.

[0047] The above describes the present application in combination with the best embodiments, but the present application is not limited to the above disclosed embodiments, but should cover various modifications, equivalent combinations according to the essence of the present application.

Claims

1. A gas thermal power recovery device (1), characterized in that, The device includes a collector housing (11) that is cylindrical and has an air inlet (111) and an air outlet (112) at both ends. A heat-conducting support (13) is connected inside the collector housing (11). The heat-conducting support (13) includes a conical hollow structure whose cross-section gradually increases along the direction of hot air flow. A spiral coil (12) is wound around the heat-conducting support (13), and the two ends of the spiral coil (12) are a high-pressure gas inlet (123) and a high-pressure gas outlet (124), respectively. The conical hollow structure includes a conical heat-conducting cylinder (132) and heat-conducting ribs (133). The side wall of the conical heat-conducting cylinder (132) is provided with... There are several openings (1321), and the heat-conducting fins (133) are located inside the conical heat-conducting cylinder (132); the front and rear ends of the conical heat-conducting cylinder (132) are connected; the heat-conducting fins (133) and the openings (1321) of the conical heat-conducting cylinder (132) form an air duct; the front and rear ends of the conical heat-conducting cylinder (132) are respectively provided with a front flow guide baffle (134) and a rear flow guide baffle (135); the outer edge dimension of the front flow guide baffle (134) is smaller than the front opening of the conical heat-conducting cylinder (132), and the outer edge dimension of the rear flow guide baffle (135) is smaller than the rear opening of the conical heat-conducting cylinder (132).

2. The gas thermal power recovery device according to claim 1, characterized in that, The cross-sectional dimension of the air inlet (111) is smaller than the cross-section of the inner cavity of the collector housing (11) and the air outlet (112).

3. A gas thermal power recovery device according to claim 1, characterized in that, The spiral coil (12) includes a first spiral coil (121), which is wound around the outside of the conical heat-conducting cylinder (132) and a gap is left between two adjacent coils of the first spiral coil (121).

4. A gas thermal power recovery device according to claim 1 or 3, characterized in that, The heat-conducting support (13) also includes a support (131) connected between the conical hollow structure and the outer shell (11) of the regenerator. The spiral coil (12) includes a second spiral coil (122), which is wound around the support (131) and there is a gap between two adjacent coils of the second spiral coil (122).

5. A gas thermal power recovery device according to claim 1, characterized in that, The high-pressure gas inlet (123) is located near the air outlet (112) of the regenerator housing (11), and the high-pressure gas outlet (124) is located near the air inlet (111) of the regenerator housing (11).

6. A gas thermal power recovery device according to claim 1, characterized in that, The diameter of the spiral coil (12) is larger than the diameter of the high-pressure gas inlet (123).

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