Waste heat recovery system based on loop heat pipe and suitable for gas turbine

Abstract

The invention provides a waste heat recovery system suitable for a gas turbine and based on a loop heat pipe, and belongs to the technical field of heat management.The system comprises a gas compressor, a condenser, a combustion chamber, the turbine, a spray pipe and an evaporator which are sequentially arranged, the condenser and a diffuser at an outlet of the gas compressor are integrally arranged, and the evaporator is arranged at the tail of the spray pipe; the bottom of the condenser is connected with the bottom of the evaporator through a descending pipe, the top of the condenser pipe is connected with the top of the evaporator through an ascending pipe, and heat exchange media are arranged in the condenser and the evaporator. According to the treatment scheme, the waste heat of the gas turbine is effectively recycled and transmitted to the inlet of the combustion chamber of the engine, and the thermodynamic cycle efficiency of the gas turbine is effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of thermal management, and particularly to a waste heat recovery system based on a loop heat pipe applicable to a gas turbine. Background Art

[0002] The thermal management system of an aeroengine shoulders the heavy responsibility of designing the heat distribution among various components and systems of the engine, as well as between the aircraft and the engine, so as to achieve the purpose of improving energy utilization efficiency and realizing the optimal design of the system.

[0003] With the continuous improvement of the requirements for engine energy conservation, emission reduction, and environmental protection in recent years, engine energy conservation and emission reduction technologies have become one of the most important directions of its technological development. Only about one-third of the energy released by the combustion of engine fuel is effectively utilized, and effectively recovering and utilizing the exhaust waste heat of a gas turbine is the most effective way to promote and expand the development of gas turbines. For example, the SGT-300 gas turbine designed and manufactured by Siemens and Takuma is particularly suitable for combined heat and power generation. The high-temperature waste gas generated by the equipment is reused through a waste heat recovery device, so that the thermal efficiency reaches more than 95%. The generated steam or hot water can be used for industrial production and can also be combined with a steam turbine for a small combined cycle. With the increase in energy consumption of the new generation of aeroengines, a large amount of heat is dissipated or directly discharged into the atmosphere, causing great waste. However, introducing an intercooler and an evaporator into the traditional engine structure can effectively utilize the exhaust waste heat of the engine to improve its performance, but it will make the engine structure more complex, and at the same time, the manufacturing difficulty and research and development cost will increase significantly.

[0004] The performance level of current conventional aeroengines is already very high, and their working conditions have almost reached the limit use state of materials, making it difficult to further increase the working temperature and pressure.

[0005] The waste heat recovery technology based on a loop heat pipe is a technology that uses intermediate media such as water, therminol, or freon to transfer the heat of the gas turbine exhaust to the inlet end of the combustion chamber, improving the thermal cycle efficiency of the gas turbine. Waste heat recovery technology has received much attention in the fields of automobiles, ships, industry, etc., but the waste heat recovery technology based on a loop heat pipe has not been applied and promoted in aeroengines.

[0006] Compared with simply introducing the intercooler and evaporator technologies, the waste heat recovery device based on a loop heat pipe has advantages such as high heat transfer efficiency and high reliability, and can pass. However, in the field of aeroengines in China at present, there is a lack of relevant research and application of waste heat recovery technology applicable to aeroengines. Summary of the Invention

[0007] In view of this, an embodiment of the present application provides a waste heat recovery system based on a loop heat pipe applicable to a gas turbine, which recovers and utilizes the waste heat of the engine without affecting the overall layout of the core components of the aeroengine, improves the energy utilization efficiency, and achieves energy conservation and emission reduction.

[0008] An embodiment of the present application provides a waste heat recovery system based on a loop heat pipe applicable to a gas turbine. The system includes a compressor, a condenser, a combustion chamber, a turbine, a nozzle, and an evaporator arranged in sequence. The condenser is integrally arranged with the diffuser at the outlet of the compressor. The evaporator is arranged at the tail of the nozzle. The bottom of the condenser is connected to the bottom of the evaporator through a downcomer, and the top of the condenser is connected to the top of the evaporator through a riser. A heat transfer medium is provided in the condenser and the evaporator.

[0009] According to a specific implementation manner of an embodiment of the present application, bypass nozzles are respectively arranged on both sides of the nozzle, a power turbine is arranged at the tail of each bypass nozzle, and an evaporator is respectively connected to the tail of the power turbine.

[0010] According to a specific implementation manner of an embodiment of the present application, the riser includes a main riser and branch risers. The top of the condenser is connected to one end of the main riser, the top of the evaporator is connected to one end of the branch risers, and the other end of the main riser is connected to the other end of the branch risers.

[0011] According to a specific implementation manner of an embodiment of the present application, the downcomer includes a main downcomer and branch downcomers. The bottom of the condenser is connected to one end of the main downcomer, the bottom of the evaporator is connected to one end of the branch downcomers, and the other end of the main downcomer is connected to the other end of the branch downcomers.

[0012] According to a specific implementation manner of an embodiment of the present application, the evaporator and the power turbine are connected in a flange form.

[0013] According to a specific implementation manner of an embodiment of the present application, a circulation pump is provided on the downcomer.

[0014] According to a specific implementation manner of an embodiment of the present application, a medium outlet mounting seat is provided at the top of the evaporator. A heat transfer medium outlet is provided on the medium outlet mounting seat, and the heat transfer medium outlet communicates with the steam collecting chamber at the top end inside the evaporator. A medium collecting chamber is provided at the bottom end inside the evaporator. The medium collecting chamber is connected with a heat transfer medium inlet. The heat transfer medium outlet and the heat transfer medium inlet are connected through a heat transfer structure. The heat transfer medium is located inside the heat transfer structure. An air intake mounting edge is provided on the side of the evaporator, and the evaporator is fixed through the air intake mounting edge.

[0015] According to a specific implementation manner of an embodiment of the present application, the heat transfer structure includes staggered tube bundles and tile-shaped fins.

[0016] According to a specific implementation of the embodiment of the present application, the ascending pipe is inclined upward along the flow direction of the heat exchange medium, and the descending pipe is inclined downward along the flow direction of the heat exchange medium.

[0017] According to a specific implementation method of an embodiment of the present application, the condenser and the compressor outlet diffuser are integrated by 3D printing.

[0018] Beneficial effects:

[0019] The waste heat recovery system based on the loop heat pipe for gas turbines in the embodiment of the present application can recycle the waste heat of engine exhaust without affecting the structure of the core components of the aircraft engine. At the same time, the heat recovery circulation device based on the loop heat pipe has the advantages of high heat exchange efficiency and high reliability.

[0020] The high-temperature exhaust gas generated during the operation of the engine is used as a heat source, and the compressor outlet air is used as a cold source. The two are fully heat-exchanged through the heat exchange medium to form a temperature difference, and the latent heat of vaporization of the heat exchange medium is used to improve the heat transfer capacity, which can effectively recover the waste heat of the gas turbine and transfer it to the inlet of the engine combustion chamber, effectively improving the thermal cycle efficiency of the gas turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of a waste heat recovery system based on a loop heat pipe applicable to a gas turbine according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of a waste heat recovery system provided with a power turbine according to an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of a waste heat recovery system provided with a circulation pump according to an embodiment of the present invention;

[0025] Figure 4 is a connection diagram of a condenser and an evaporator according to an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of the structure of an evaporator according to an embodiment of the present invention

[0027] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0028] Figure 7 Schematic diagram of the heat exchange medium flow path of the evaporator according to an embodiment of the present invention;

[0029] Figure 8 Front view of the evaporator according to an embodiment of the present invention along the flight direction;

[0030] Figure 9 is Figure 8 Partial enlarged view at position B in

[0031] Figure 10 Schematic diagram of the outlet end of the heat exchange medium according to an embodiment of the present invention;

[0032] Figure 11 General schematic diagram of the evaporator according to an embodiment of the present invention.

[0033] In the figure: 1, compressor; 2, condenser; 3, combustion chamber; 4, turbine; 5, nozzle; 6, evaporator; 7, bypass nozzle; 8, power turbine; 9, circulation pump; 10, riser pipe; 11, downcomer; 12, intake mounting flange; 13, medium outlet mounting seat; 14, heat exchange medium outlet; 15, steam collecting chamber; 16, tile-shaped fin; 17, staggered tube bundle; 18, heat exchange medium inlet; 19, medium collecting chamber. Detailed implementation manners

[0034] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0035] The following uses specific specific examples to illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0036] It should be noted that the following description relates to various aspects of embodiments within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement a device and / or practice a method. Additionally, this device can be implemented and this method can be practiced using other structures and / or functionality in addition to one or more of the aspects described herein.

[0037] It should also be noted that the diagrams provided in the following embodiments merely illustrate the basic concept of this application schematically. The diagrams only show the components related to this application and are not drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0038] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0039] An embodiment of this application provides a waste heat recovery system based on a loop heat pipe applicable to a gas turbine. The following is a detailed description with reference to Figures 1 to 11 this.

[0040] In one embodiment, with reference to Figure 1 , a waste heat recovery system based on a loop heat pipe applicable to a gas turbine includes a compressor 1, a condenser 2, a combustion chamber 3, a turbine 4, a nozzle 5, and an evaporator 6 arranged in sequence. The condenser 2 is integrally provided with the diffuser at the outlet of the compressor 1. The evaporator 6 is arranged at the tail of the nozzle 5. The bottom of the condenser 2 is connected to the bottom of the evaporator 6 through a downcomer 11, and the top of the condenser tube is connected to the top of the evaporator 6 through a riser 10. A heat transfer medium is provided in the condenser 2 and the evaporator 6.

[0041] In specific implementation, the heat transfer medium can be set as Therminol A. After the evaporator 6 at the outlet of the nozzle 5 absorbs the waste heat of the exhaust gas, the heat flow is carried to the condenser 2 through the phase change of intermediate heat transfer media such as Therminol A. The vaporized intermediate media such as Therminol A transfer the heat flow to the high-pressure air at the outlet of the compressor 1 through the condenser 2, increasing the air temperature. After transferring the heat to the high-pressure air at the outlet of the compressor 1, the intermediate media such as Therminol A condense on the wall surface, turn back into a liquid state, and collect at the bottom of the condenser 2, and are drained back to the bottom of the evaporator 6 through the downcomer 11, forming the entire regenerative cycle system.

[0042] In one embodiment, referring to Figure 2 , bypass nozzles 7 are respectively provided on both sides of the nozzle 5, a power turbine 8 is provided at the tail of each bypass nozzle 7, and an evaporator 6 is respectively connected to the tail of the power turbine 8.

[0043] Specifically, most of the gas is exhausted through the main nozzle 5 to convert kinetic energy to provide propulsion force, and the remaining gas enters the power turbine 8 through the bypass nozzles 7 on both sides to cool down and reduce pressure. The energy extracted by the power turbine 8 is converted into other energy forms such as electric energy. The gas after the power turbine 8 then recovers the remaining heat energy through the evaporator 6. Intermediate media such as diphenyl oxide in the evaporator 6 absorb heat and evaporate, enter the condenser 2 through the riser pipe 10, the steam cools down to become a liquid through the wall of the condenser 2, and then returns to the bottom of the evaporator 6 through the downcomer 11, forming a complete regenerative cycle.

[0044] Referring to Figure 2 , the gas at the outlet of the turbine 4 is divided into three paths. Most of the gas is exhausted through the main nozzle 5 to convert kinetic energy to provide part of the thrust. The remaining two paths of gas enter the bypass nozzles 7 through the exhaust ports on both sides of the main nozzle 5 and then cool down and reduce pressure through the power turbine 8. The energy extracted by the power turbine 8 is converted into electric energy and can input shaft work to devices such as the ducted fan of the aircraft, so as to increase the overall bypass ratio of the gas turbine 4 and improve the propulsion efficiency of the gas turbine 4, solving the problem of low efficiency of the gas turbine 4 with a small bypass ratio; the two evaporators 6 and the two power turbines 8 are assembled in the form of flanges. Intermediate media such as diphenyl oxide in the evaporator 6 absorb the waste gas after the power turbine 8 and boil and evaporate. The steam enters the condenser 2 through the riser pipe 10, cools down to become a liquid through the wall of the condenser 2, and then returns to the bottom of the evaporator 6 through the downcomer 11, forming a complete regenerative cycle. This method can improve the overall thermal cycle efficiency of the gas turbine 4, and the proportion of waste heat recovery can reach more than 20%, which is much higher than the conventional waste heat recovery system based on the thermoelectric effect.

[0045] In one embodiment, referring to Figure 4 , the riser pipe 10 includes a main riser pipe and branch riser pipes. One end of the main riser pipe is connected to the top of the condenser 2, and one end of the branch riser pipe is connected to the top of the evaporator 6. The other end of the main riser pipe is connected to the other end of the branch riser pipe.

[0046] Furthermore, the downcomer 11 includes a main downcomer 11 and branch downcomers 11. One end of the main downcomer 11 is connected to the bottom of the condenser 2, and one end of the branch downcomer 11 is connected to the bottom of the evaporator 6. The other end of the main downcomer 11 is connected to the other end of the branch downcomer 11.

[0047] In this embodiment, different from the simple series flow path of a conventional loop heat pipe, the intermediate medium fluid inside the loop heat pipe of this embodiment absorbs heat and boils and evaporates through two evaporators 6 respectively. The steam enters the riser 10 through the channels above the two evaporators 6. The two streams of steam converge into one fluid in the riser 10 and enter the condenser 2. The riser 10 is generally inclined upward, and the downcomer 11 is generally inclined downward, ensuring that there is a certain potential difference in the entire system to increase the flow effect of the fluid. The steam enters the annular condenser 2 through the riser 10. The fluid directly exchanges heat with the air at the outlet of the compressor 1 in the annular condenser 2, condenses into a liquid in the interlayer channel of the condenser 2, and then falls into the downcomer 11 under the action of gravity, and is divided into two streams of liquid through the manifold in the downcomer 11 and flows into the evaporators 6 respectively, forming a complete loop. The advantage of this solution is that it can make full use of the waste gas at the outlet of the power turbine 8 for heat exchange, solve the problem of small heat exchange area of the loop heat pipe. The heat exchange area of this solution is much larger than that of traditional heat pipes. After calculation, the effective heat exchange area can reach 2m 2 or more.

[0048] Further, the evaporator 6 and the power turbine 8 are connected in a flange form.

[0049] Further, referring to Figure 3 , a circulation pump 9 is provided on the downcomer 11. The circulation pump 9 for intermediate media such as Therminol A in the loop heat pipe is increased to increase the mass flow rate in the regenerative cycle system and improve the heat exchange capacity of the system.

[0050] In one embodiment, the condenser 2 and the diffuser at the outlet of the compressor 1 are integrally arranged by 3D printing.

[0051] Specifically, the integrated design of the condenser 2 and the diffuser at the outlet of the compressor 1 can complete the structure manufacturing by means of 3D pressing, etc. The intermediate medium steam such as Therminol A cools and condenses into a liquid in the condenser 2, collects the liquid through the lower downcomer 11, and distributes it to the base of the evaporator 6 by means of gravity or the circulation pump 9. The liquid in the evaporator 6 absorbs heat and evaporates and then enters the riser 10, and finally enters the condenser 2 to form a closed cycle.

[0052] In one embodiment, referring to Figures 5 to 11 , a medium outlet mounting seat 13 is provided at the top of the evaporator 6. A heat exchange medium outlet 14 is provided on the medium outlet mounting seat 13, and the heat exchange medium outlet 14 communicates with the steam collecting cavity 15 at the top end inside the evaporator 6; a medium collecting cavity 19 is provided at the bottom end inside the evaporator 6, and the medium collecting cavity 19 is connected with a heat exchange medium inlet. The heat exchange medium outlet 14 and the heat exchange medium inlet are connected through a heat exchange structure, and the heat exchange medium is located in the heat exchange structure; an air intake mounting edge 12 is provided on the side of the evaporator 6 and is fixed through the air intake mounting edge 12.

[0053] During specific implementation, intermediate media such as Heat Transfer Medium A enter the liquid collection chamber 8 at the base of the evaporator 6 through the medium inlet 7, absorb the heat of fuel gas or air and undergo a phase change into steam, enter the steam collection chamber 154, and after sufficient steam mixing, flow out through the medium outlet 3.

[0054] Preferably, the heat exchange structure includes staggered tube bundles 17 and tile-shaped fins 16. The tile-shaped fins 16 can significantly increase the secondary heat exchange area compared to flat fins, enhancing the heat exchange capacity of the evaporator 6.

[0055] Furthermore, the height of the tile-shaped fins 16 is set to 4 - 8 mm, the fin pitch is set to 5 - 10 mm, the wall thickness is set to 0.5 - 1 mm, and the fin bending angle is set to 70 - 90°, and can be adjusted according to the situation. The outer diameter of the tubes of the staggered tube bundles 17 is set to 3 - 7 mm, and the wall thickness is set to 0.5 - 1 mm.

[0056] In one embodiment, the riser tube 10 is inclined upward along the flow direction of the heat exchange medium, and the downcomer tube 11 is inclined downward along the flow direction of the heat exchange medium. By this inclined method, a certain potential difference can be ensured for the fluid in the entire system, increasing the fluid flow effect.

[0057] This application utilizes the heat transfer principle of the loop heat pipe to form a regenerative cycle system based on the loop heat pipe. The specific scheme is as follows:

[0058] 1. Evaporator 6: The evaporator 6 installed in the hot end exhaust gas flow path absorbs the heat in the hot end exhaust gas and carries the heat to the condenser 2 through the phase change of the working fluid in the heat pipe.

[0059] 2. Heat pipe riser tube 10 and installation interface: The steam generated by the phase change of the working fluid in the heat pipe evaporator 6 gathers in the upper steam collection chamber 15 of the evaporator 6, and then the steam is transported to the upper part of the condenser 2 through the steam riser tube 10. The steam collection chamber 15 is installed inside the flow path, and the riser tube 10 needs to penetrate the upper part of the flow path.

[0060] 3. Function of condenser 2: The heat pipe condenser 2 is directly a thin-layer cavity structure attached to the air flow path at the outlet of the compressor 1. The steam coming from the riser tube 10 directly condenses on the flow path wall surface, transferring the heat to the high-pressure flowing air on the other side of the wall surface, increasing the air temperature.

[0061] 4. Function of liquid downcomer tube 11: The working fluid condenses back into a liquid state on the wall surface, gathers at the bottom of the cold end, and is drained back to the medium liquid collection chamber 19 at the bottom of the evaporator 6 through the downcomer tube 11. In this way, the entire regenerative cycle forms a closed loop, ultimately achieving the use of the heat flow of the hot end exhaust gas to heat the high-pressure air.

[0062] The embodiments provided by the present invention can recover and utilize the waste heat of the engine exhaust without affecting the structure of the core components of the aeroengine. At the same time, the regenerative cycle device based on the loop heat pipe has advantages such as high heat transfer efficiency and high reliability.

[0063] The high-temperature exhaust gas generated during the operation of the engine is used as a heat source, and the air at the outlet of the compressor 1 is used as a cold source. The two are fully heat-exchanged through materials such as Dowtherm A and Freon to form a temperature difference, and the latent heat of vaporization of intermediate media such as Dowtherm A is utilized to improve the heat transfer capacity. The system mainly includes an evaporator 6, a vapor riser 10, a condenser 2, a liquid working medium downcomer 11 and a heat pipe installation interface. This patent can effectively recover the waste heat of the gas turbine 4 and transfer it to the inlet of the engine combustion chamber 3, effectively improving the thermal cycle efficiency of the gas turbine 4.

[0064] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the technical field of the present application within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A waste heat recovery system based on a loop heat pipe applicable to a gas turbine, characterized in that, The system includes a compressor (1), a condenser (2), a combustion chamber (3), a turbine (4), a nozzle (5), and an evaporator (6) arranged in sequence. The condenser (2) is integrally provided with the diffuser at the outlet of the compressor (1). The evaporator (6) is arranged at the tail of the nozzle (5). The bottom of the condenser (2) is connected to the bottom of the evaporator (6) through a downcomer (11), and the top of the condenser tube is connected to the top of the evaporator (6) through a riser (10). Heat exchange media are provided in the condenser (2) and the evaporator (6).

2. The waste heat recovery system based on a loop heat pipe applicable to a gas turbine according to claim 1, characterized in that, Bypass nozzles (7) are respectively arranged on both sides of the nozzle (5). A power turbine (8) is provided at the tail of each bypass nozzle (7), and an evaporator (6) is respectively connected to the tail of the power turbine (8).

3. The waste heat recovery system based on a loop heat pipe applicable to a gas turbine according to claim 2, wherein, The riser (10) includes a main riser and branch risers. The top of the condenser (2) is connected to one end of the main riser, the top of the evaporator (6) is connected to one end of the branch risers, and the other end of the main riser is connected to the other end of the branch risers.

4. The waste heat recovery system based on a loop heat pipe applicable to a gas turbine according to claim 2, wherein The downcomer (11) includes a main downcomer and branch downcomers. The bottom of the condenser (2) is connected to one end of the main downcomer, the bottom of the evaporator (6) is connected to one end of the branch downcomers, and the other end of the main downcomer is connected to the other end of the branch downcomers.

5. The waste heat recovery system based on a loop heat pipe applicable to a gas turbine (4) according to claim 2, characterized in that, The evaporator (6) and the power turbine (8) are connected in a flange form.

6. The loop heat pipe-based waste heat recovery system applicable to a gas turbine (4) according to claim 1, characterized in that, A circulation pump (9) is provided on the downcomer (11).

7. The waste heat recovery system based on a loop heat pipe applicable to a gas turbine according to claim 1, wherein A medium outlet mounting seat (13) is provided at the top of the evaporator (6). A heat exchange medium outlet (14) is provided on the medium outlet mounting seat (13), and the heat exchange medium outlet (14) communicates with a steam collecting chamber (15) at the inner top end of the evaporator (6). A medium collecting chamber (19) is provided at the inner bottom end of the evaporator (6). The medium collecting chamber (19) is connected to a heat exchange medium inlet (18). The heat exchange medium outlet (14) and the heat exchange medium inlet (18) are connected through a heat exchange structure, and the heat exchange medium is located in the heat exchange structure. An air inlet mounting edge (12) is provided on the side of the evaporator (6), and the evaporator (6) is fixed through the air inlet mounting edge (12).

8. The waste heat recovery system based on a loop heat pipe applicable to a gas turbine according to claim 7, characterized in that, The heat exchange structure includes staggered tube bundles (17) and tile-shaped fins (16).

9. The waste heat recovery system based on a loop heat pipe applicable to a gas turbine according to any one of claims 1-8, characterized in that, The riser (10) is inclined upward along the flow direction of the heat exchange medium, and the downcomer (11) is inclined downward along the flow direction of the heat exchange medium.

10. The waste heat recovery system based on a loop heat pipe applicable to a gas turbine according to any one of claims 1-8, characterized in that, The condenser (2) and the diffuser at the outlet of the compressor (1) are integrally provided by 3D printing.

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