A combined power generation and refrigeration system based on supercritical carbon dioxide

Abstract

The present invention relates to the technical field of supercritical carbon dioxide-based power generation and refrigeration combined systems, specifically a supercritical carbon dioxide-based power generation and refrigeration combined system comprising: a fan casing, one side of the fan casing is connected to an outer casing, the inner side of the outer casing is closely attached to an explosion-proof layer, the inner side of the explosion-proof layer is closely attached to a waterproof layer, the inner side of the waterproof layer is closely attached to multiple groups of spiral reinforcement ribs, the inner side of the spiral reinforcement ribs is closely attached to the inner casing, a heat dissipation groove is formed between the inner casing and the waterproof layer, and a turbine casing is constituted; the beneficial effect is: a supercritical carbon dioxide-based power generation and refrigeration combined system proposed by the present invention, a water inlet is provided on one side of the top of the outer casing, the water inlet is connected to a water spray ring on one side of the heat dissipation groove, a circulating water tank supplies water to the water spray ring through the water inlet, and multiple groups of high-pressure water spray nozzles on the water spray ring are respectively aligned with the heat dissipation grooves separated by the spiral reinforcement ribs, and the high-pressure water spray nozzles can spray cooling water into the heat dissipation groove.

Description

Technical Field

[0001] The present invention relates to the technical field of combined power generation and refrigeration systems based on supercritical carbon dioxide, and in particular to a combined power generation and refrigeration system based on supercritical carbon dioxide. Background Art

[0002] A supercritical carbon dioxide power generation and refrigeration system is an energy system that can simultaneously utilize carbon dioxide for both power generation and refrigeration. In this system, supercritical carbon dioxide is used as a working fluid. Under high temperature and high pressure, it can drive a turbine to generate electricity and also provide cooling through a refrigeration cycle.

[0003] The specific workflow of a conventional supercritical CO2 power generation and refrigeration system is as follows: First, supercritical CO2 is heated under high-pressure and high-temperature conditions, reaching a high-temperature, high-pressure supercritical state. This high-temperature, high-pressure supercritical CO2 is then introduced into a turbine, which drives the turbine and generates electricity. Simultaneously, some of the supercritical CO2 is fed into a refrigeration cycle, where it achieves a cooling effect through expansion and compression.

[0004] However, most existing turbines do not have cooling structures. When high-temperature supercritical carbon dioxide enters the turbine, it will release a large amount of heat, causing the temperature inside the turbine to rise sharply, reducing the functionality of the equipment inside the turbine, and even causing damage to the equipment. Summary of the Invention

[0005] The object of the present invention is to provide a combined power generation and refrigeration system based on supercritical carbon dioxide to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a fan casing, one side of the fan casing is connected to the outer casing, the inner side of the outer casing is closely attached to an explosion-proof layer, the inner side of the explosion-proof layer is closely attached to a waterproof layer, the inner side of the waterproof layer is closely attached to multiple groups of spiral reinforcement ribs, the inner side of the spiral reinforcement ribs is closely attached to the inner casing, and a heat dissipation groove is formed between the inner casing and the waterproof layer to constitute a turbine casing.

[0007] Preferably, a rotor is provided in the middle of the outer shell, and one end of the rotor is simultaneously inserted into the middle of the fan shell. The rotor can rotate in the middle of the fan shell and the outer shell. A fan is provided at the end of the rotor in the fan shell, and an air inlet is opened in the middle of the outer side of the fan shell. The fan can drive the rotor to rotate, so that the turbine starts to generate electricity.

[0008] Preferably, the rotor is connected to a medium-pressure compressor at one end close to the air inlet, and the medium-pressure compressor compresses the supercritical carbon dioxide entering from the air inlet. A high-pressure compressor is also provided on the rotor, and the high-pressure compressor is provided on the inner side of the medium-pressure compressor. The high-pressure compressor can compress the supercritical carbon dioxide again.

[0009] Preferably, an air outlet is provided at one end of the outer shell, and supercritical carbon dioxide is discharged from the outer shell through the air outlet after power generation is completed. The rotor is provided with a high-pressure turbine, a medium-pressure turbine and a low-pressure turbine at one end close to the air outlet.

[0010] Preferably, a water inlet is provided on the top of the outer shell, the bottom of the water inlet is inserted into the heat dissipation groove and connected to the water spray ring provided at one end of the heat dissipation groove, and the other end of the water inlet is connected to the circulating water tank, and the circulating water tank can send cooling water into the water spray ring through the water inlet.

[0011] Preferably, the water spray ring is provided with high-pressure water spray nozzles, which are divided into multiple groups. Each group of high-pressure water spray nozzles is respectively aimed at the heat dissipation grooves separated by the spiral reinforcement ribs. The high-pressure water spray nozzles can spray cooling water into the heat dissipation grooves separated by the spiral reinforcement ribs to perform water cooling on the device and prevent the device from overheating.

[0012] Preferably, an explosion-proof layer is closely attached to the inner side of the outer shell, which can protect the device from explosion due to the expansion of supercritical carbon dioxide, and the heat dissipation groove can reinforce the shell and increase the firmness of the shell.

[0013] Preferably, the inner side of the explosion-proof layer is closely attached to a waterproof layer, which can isolate the cooling water in the heat dissipation tank and prevent the cooling water from penetrating into the explosion-proof layer, affecting the explosion-proof performance of the explosion-proof layer and causing the explosion-proof performance of the explosion-proof layer to be weakened.

[0014] Preferably, the heat dissipation trough is provided with a water outlet trough at one end close to the air outlet, and the water outlet trough is the same as the heat dissipation trough separated by multiple groups of spiral reinforcement ribs. The cooling water in the heat dissipation trough can flow into the water outlet trough. A water outlet is provided at the bottom of the water outlet trough, and the other end of the water outlet is connected to the circulating water tank. The water outlet trough can deliver the cooling water into the circulating water tank through the water outlet.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention proposes a combined power generation and refrigeration system based on supercritical carbon dioxide. A water inlet is provided on the top side of the outer shell, and the water inlet is connected to the water spray ring on one side of the heat sink. The circulating water tank supplies water to the water spray ring through the water inlet. Multiple groups of high-pressure water spray nozzles on the water spray ring are respectively aimed at the heat sinks separated by spiral reinforcement ribs. The high-pressure water spray nozzles can spray cooling water into the heat sink, so that the cooling water flows in the heat sink to cool the turbine. The cooling water flows and finally flows into the water outlet trough provided at the end of one side of the heat sink. The water outlet trough is communicated with the heat sinks separated by multiple groups of spiral reinforcement ribs. A water outlet is provided at the bottom of the water outlet trough, and the other end of the water outlet is connected to the circulating water tank. The water outlet can send the cooling water back into the circulating water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure at center A;

[0020] Figure 4 This is another schematic cross-sectional view of the present invention;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the heat dissipation slot of the present invention.

[0022] In the figure: fan casing 1, outer casing 2, air inlet 3, air outlet 4, water inlet 5, water outlet 6, rotor 7, fan 8, intermediate-pressure compressor 9, high-pressure compressor 10, high-pressure turbine 11, intermediate-pressure turbine 12, low-pressure turbine 13, explosion-proof layer 14, waterproof layer 15, inner casing 16, heat dissipation groove 17, spiral reinforcement rib 18, water outlet groove 19, water spray ring 20, high-pressure water spray port 21. DETAILED DESCRIPTION

[0023] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1 to 5The present invention provides a technical solution: a fan housing 1, one side of the fan housing 1 is connected to the outer housing 2, the inner side of the outer housing 2 is closely attached to an explosion-proof layer 14, the inner side of the explosion-proof layer 14 is closely attached to a waterproof layer 15, the inner side of the waterproof layer 15 is closely attached to multiple groups of spiral reinforcement ribs 18, the inner side of the spiral reinforcement ribs 18 is closely attached to the inner housing 16, and a heat dissipation groove 17 is formed between the inner housing 16 and the waterproof layer 15 to constitute a turbine housing; a rotor 7 is provided in the middle of the outer housing 2, one end of the rotor 7 is simultaneously plugged into the middle of the fan housing 1, and the rotor 7 can be in the fan housing. 1 rotates with the middle part of the outer shell 2. A fan 8 is provided at the end of the rotor 7 in the fan housing 1. An air inlet 3 is opened in the middle part of the outer side of the fan housing 1. The fan 8 can drive the rotor 7 to rotate, so that the turbine starts to generate electricity. The rotor 7 is connected to an intermediate-pressure compressor 9 at one end near the air inlet 3. The intermediate-pressure compressor 9 compresses the supercritical carbon dioxide entering from the air inlet 3. The rotor 7 is also provided with a high-pressure compressor 10. The high-pressure compressor 10 is arranged on the inner side of the intermediate-pressure compressor 9 and can compress the supercritical carbon dioxide again.

[0025] An air outlet 4 is provided at one side end of the outer shell 2, and supercritical carbon dioxide is discharged from the outer shell 2 through the air outlet 4 after power generation is completed. The rotor 7 is provided with a high-pressure turbine 11, a medium-pressure turbine 12 and a low-pressure turbine 13 at one end near the air outlet 4; a water inlet 5 is provided at the top of the outer shell 2, and the bottom of the water inlet 5 is inserted into the heat dissipation groove 17 and connected to the water spray ring 20 provided at one end of the heat dissipation groove 17. The other end of the water inlet 5 is connected to the circulating water tank, and the circulating water tank can send cooling water into the water spray ring 20 through the water inlet 5; a high-pressure water spray port 21 is provided on the water spray ring 20, and the high-pressure water spray port 21 is divided into multiple groups, and each group of high-pressure water spray ports 21 is respectively aligned with the heat dissipation groove 17 separated by the spiral reinforcement ribs 18. The high-pressure water spray port 21 can spray cooling water into the heat dissipation groove 17 separated by the spiral reinforcement ribs 18 to water-cool the device and prevent the device from overheating.

[0026] The inner side of the outer shell 2 is closely attached to an explosion-proof layer 14, which can be used to explosion-proof the device and prevent the device from exploding due to the expansion of supercritical carbon dioxide. The heat dissipation groove 17 can reinforce the shell and deepen the firmness of the shell; the inner side of the explosion-proof layer 14 is closely attached to a waterproof layer 15, which can isolate the cooling water in the heat dissipation groove 17 to prevent the cooling water from penetrating into the explosion-proof layer 14, affecting the explosion-proof performance of the explosion-proof layer 14, and causing the explosion-proof performance of the explosion-proof layer 14 to be weakened; the heat dissipation groove 17 is provided with a water outlet trough 19 at one end near the air outlet 4, and the water outlet trough 19 is all the same as the heat dissipation groove 17 separated by multiple groups of spiral reinforcement ribs 18. The cooling water in the heat dissipation groove 17 can flow into the water outlet trough 19, and the bottom of the water outlet trough 19 is provided with a water outlet 6. The other end of the water outlet 6 is connected to the circulating water tank, and the water outlet trough 19 can send the cooling water into the circulating water tank through the water outlet 6.

[0027] In actual use, when supercritical carbon dioxide is used to generate electricity, high-temperature and high-pressure supercritical carbon dioxide is first introduced into the turbine through the air inlet 3. The supercritical carbon dioxide begins to drive the fan 8 to rotate, so that the fan 8 drives the rotor 7 to rotate, and the turbine starts to generate electricity. At the same time, the fan 8 introduces supercritical carbon dioxide into the turbine. While rotating, the rotor 7 drives the rotor 7 to rotate together with the intermediate-pressure compressor 9 and the high-pressure compressor 10 near one end of the air inlet 3, so that the intermediate-pressure compressor 9 and the high-pressure compressor 10 compress the supercritical carbon dioxide.

[0028] The inner side of the outer shell 2 of the outermost layer of the turbine is tightly attached to an explosion-proof layer 14. The explosion-proof layer 14 is used to perform explosion-proof treatment on the turbine shell to prevent supercritical carbon dioxide from rapidly expanding in the turbine and causing the turbine to explode. A heat dissipation groove 17 is provided between the waterproof layer 15 and the inner shell 16. A plurality of spiral reinforcement ribs 18 are provided in the heat dissipation groove 17. The waterproof layer 15 is tightly attached to the explosion-proof layer 14 and waterproofed to prevent the cooling water from eroding the explosion-proof layer 14, resulting in a decrease in the explosion-proof performance of the explosion-proof layer 14. A water inlet 5 is provided on one side of the top of the outer shell 2. The water inlet 5 is connected to the water spray ring 20 on one side of the heat dissipation groove 17 for circulation. The water tank supplies water to the water spray ring 20 through the water inlet 5. The multiple groups of high-pressure water spray nozzles 21 on the water spray ring 20 are respectively aligned with the heat dissipation grooves 17 separated by the spiral reinforcement ribs 18. The high-pressure water spray nozzles 21 can spray cooling water into the heat dissipation grooves 17, so that the cooling water flows in the heat dissipation grooves 17 to cool the turbine. The cooling water flows and finally flows into the water outlet groove 19 provided at one end of the heat dissipation groove 17. The water outlet groove 19 is communicated with the heat dissipation grooves 17 separated by the multiple groups of spiral reinforcement ribs 18. A water outlet 6 is provided at the bottom of the water outlet groove 19. The other end of the water outlet 6 is connected to the circulating water tank. The water outlet 6 can send the cooling water back into the circulating water tank.

[0029] Although the above describes the illustrative specific implementation methods of the present application so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific implementation methods. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations based on the concept of the present application are protected.

Claims

1. A combined power generation and refrigeration system based on supercritical carbon dioxide, characterized by: include: turbines for generating electricity; The turbine comprises: A fan housing (1), one side of the fan housing (1) is connected to an outer housing (2), an inner side of the outer housing (2) is closely attached to an explosion-proof layer (14), an inner side of the explosion-proof layer (14) is closely attached to a waterproof layer (15), an inner side of the waterproof layer (15) is closely attached to a plurality of groups of spiral reinforcement ribs (18), an inner side of the spiral reinforcement ribs (18) is closely attached to an inner housing (16), a heat dissipation groove (17) is formed between the inner housing (16) and the waterproof layer (15), and a turbine housing is formed; A water inlet (5) is provided at the top of the outer shell (2), the bottom of the water inlet (5) is plugged into the heat dissipation groove (17), and is connected to a water spray ring (20) provided at one end of the heat dissipation groove (17), and the other end of the water inlet (5) is connected to a circulating water tank, and the circulating water tank can send cooling water into the water spray ring (20) through the water inlet (5); A high-pressure water spray port (21) is provided on the water spray ring (20), and the high-pressure water spray port (21) is divided into a plurality of groups. Each group of high-pressure water spray ports (21) is respectively aligned with the heat dissipation groove (17) separated by the spiral reinforcement rib (18). The high-pressure water spray port (21) can spray cooling water into the heat dissipation groove (17) separated by the spiral reinforcement rib (18), thereby water-cooling the device and preventing the device from overheating.

2. The supercritical carbon dioxide-based power generation and refrigeration combined system according to claim 1, characterized in that: A rotor (7) is provided in the middle of the outer shell (2), and one end of the rotor (7) is simultaneously plugged into the middle of the fan shell (1). The rotor (7) can rotate in the middle of the fan shell (1) and the outer shell (2). A fan (8) is provided at the end of the rotor (7) in the fan shell (1). An air inlet (3) is provided in the middle of the outer side of the fan shell (1). The fan (8) can drive the rotor (7) to rotate, so that the turbine starts to generate electricity.

3. The supercritical carbon dioxide-based power generation and refrigeration combined system according to claim 2, characterized in that: The rotor (7) is connected to a medium-pressure compressor (9) at one end close to the air inlet (3). The medium-pressure compressor (9) compresses the supercritical carbon dioxide entering from the air inlet (3). A high-pressure compressor (10) is also provided on the rotor (7). The high-pressure compressor (10) is provided on the inner side of the medium-pressure compressor (9). The high-pressure compressor (10) can compress the supercritical carbon dioxide again.

4. The supercritical carbon dioxide-based power generation and refrigeration combined system according to claim 3, characterized in that: An air outlet (4) is provided at one end of the outer shell (2), and supercritical carbon dioxide is discharged from the outer shell (2) through the air outlet (4) after power generation is completed. The rotor (7) is provided with a high-pressure turbine (11), a medium-pressure turbine (12), and a low-pressure turbine (13) at one end close to the air outlet (4).

5. The supercritical carbon dioxide-based power generation and refrigeration combined system according to claim 4, characterized in that: The inner side of the outer shell (2) is closely attached to an explosion-proof layer (14), and the explosion-proof layer (14) can protect the device from explosion and prevent the device from exploding due to the expansion of supercritical carbon dioxide. The heat dissipation groove (17) can reinforce the shell and deepen the robustness of the shell.

6. The supercritical carbon dioxide-based power generation and refrigeration combined system according to claim 5, characterized in that: The inner side of the explosion-proof layer (14) is closely attached to a waterproof layer (15), and the waterproof layer (15) can isolate the cooling water in the heat dissipation groove (17), thereby preventing the cooling water from penetrating into the explosion-proof layer (14), affecting the explosion-proof performance of the explosion-proof layer (14), and causing the explosion-proof performance of the explosion-proof layer (14) to be weakened.

7. The supercritical carbon dioxide-based power generation and refrigeration combined system according to claim 6, characterized in that: The heat dissipation groove (17) is provided with a water outlet groove (19) at one end close to the air outlet (4). The water outlet groove (19) is identical to the heat dissipation groove (17) separated by the plurality of spiral reinforcement ribs (18). The cooling water in the heat dissipation groove (17) can flow into the water outlet groove (19). The bottom of the water outlet groove (19) is provided with a water outlet (6). The other end of the water outlet (6) is connected to the circulating water tank. The water outlet groove (19) can send the cooling water into the circulating water tank through the water outlet (6).

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