Evaporation pressure stabilizer for organic Rankine cycle system
By integrating the evaporation chamber, exhaust gas chamber, and pressure stabilization system into an evaporative voltage regulator, and utilizing heat pipes and porous media materials, the problem of unstable low-temperature waste heat resources in the ORC system was solved, achieving stable power generation and high heat exchange efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-10
AI Technical Summary
In traditional ORC systems, the instability of low-temperature waste heat resources leads to fluctuations in evaporation pressure and unstable power generation. Furthermore, existing evaporation and pressure-stabilized gas storage systems are complex and cannot be integrated into a single skid for controlling evaporation temperature.
Design an evaporator regulator that integrates an evaporation chamber, an exhaust chamber, and a pressure stabilization system. It uses heat pipes for heat exchange, controls steam discharge through pressure monitoring and solenoid valves, and improves heat transfer efficiency by combining porous media materials and guide channels to achieve stable steam pressure and flexible temperature control.
It achieves efficient waste heat utilization, controllable evaporation temperature, stable power generation, compact structure, and is suitable for overall installation, thus improving the stability and heat exchange efficiency of the organic Rankine cycle system.
Smart Images
Figure CN223984505U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchange cycle system technology, specifically to an evaporator regulator for an organic Rankine cycle system. Background Technology
[0002] Traditional ORC (Organic Rankine Cycle) power generation systems utilize low-temperature waste heat resources as a heat source for subsequent operation. However, the instability of these resources can lead to unstable power generation. Due to the low quality and instability of the heat source, the evaporation pressure of the working fluid in the ORC system fluctuates, resulting in significant variations in power generation. Furthermore, the existing ORC system's evaporation and pressurized gas storage systems are too complex to be integrated as a single skid-mounted unit. Moreover, this type of heat exchange system cannot control the evaporation temperature in the later stages, further contributing to unstable power generation. Utility Model Content
[0003] This utility model aims to at least partially solve one of the technical problems in the related art.
[0004] Therefore, embodiments of this utility model propose an evaporative pressure regulator for an organic Rankine cycle system. This evaporative pressure regulator has high heat exchange efficiency, can effectively utilize the waste heat of high-temperature waste steam, maximize the use of energy within the heat source, and has good pressure stabilization effect.
[0005] In this embodiment, the evaporator regulator for the organic Rankine cycle system specifically includes an evaporation chamber and a waste gas chamber arranged vertically. A steam outlet is connected to the evaporation chamber, and a pressure stabilizing system is installed between the evaporation chamber and the steam outlet. The evaporation chamber is filled with an organic working fluid. Heat pipes are evenly distributed within the evaporator regulator, and each heat pipe includes a condensation section located in the evaporation chamber and an evaporation section located in the waste gas chamber. A waste gas inlet and a waste gas outlet are both connected to the waste gas chamber. The evaporation chamber, waste gas chamber, and pressure stabilizing system are integrated together, resulting in a compact structure that can be installed as a single unit. The waste gas inlet is used to connect to high-temperature waste heat vapor, fully utilizing the residual heat. The numerous and evenly distributed heat pipes allow for simultaneous heat absorption and release, resulting in high heat exchange efficiency and flexible control of the evaporation temperature.
[0006] Preferably, the pressure stabilizing system includes a pipeline connecting the steam outlet and the evaporation chamber. A pressure gauge and a solenoid valve are installed on the pipeline. The pressure gauge can monitor the steam pressure in the pressure stabilizing system in real time. When the pressure reaches the set value, the solenoid valve opens and the steam is discharged from the steam outlet, so that the power generation of the organic Rankine cycle system is relatively stable.
[0007] Preferably, the evaporation chamber and the pressure stabilizing system are separated by a first partition to prevent steam in the evaporation chamber from randomly entering the pressure stabilizing system.
[0008] Preferably, a second partition extending towards the exhaust gas chamber is provided in the middle of the third partition, and a third partition connected to the bottom of the evaporation chamber is provided around the second partition. The space between the third partition and the second partition, as well as the space inside the second partition, forms a steam guiding channel connected to the pressure stabilizing system. The heated organic working fluid generates saturated steam that can enter the pressure stabilizing system along the steam guiding channel. The steam has high flow efficiency, and the saturated steam is further heated after being guided by the third partition to form superheated high-pressure steam, which can improve the utilization of waste heat.
[0009] Furthermore, fins are provided on the outer wall of the evaporation section of the heat pipe, which can improve the heat absorption efficiency of the evaporation section.
[0010] Preferably, a fourth partition and a fifth partition are provided between the evaporation chamber and the exhaust gas chamber, and a porous medium material is filled between the fourth partition and the fifth partition. The heat pipe passes through the fourth partition and the fifth partition. The porous medium material can effectively prevent liquid organic working fluid from entering the exhaust gas chamber. At the same time, the porous medium material has a large specific surface area and good thermal conductivity, which can increase the heat transfer area and heat transfer efficiency between the evaporation chamber and the exhaust gas chamber.
[0011] Preferably, a storage tank for storing organic working fluid is connected to one side of the evaporation chamber. The pressure of the steam can be controlled by controlling the flow rate of the organic working fluid input into the evaporation chamber from the storage tank.
[0012] Preferably, the exhaust gas inlet is located in the middle of the exhaust gas chamber, and the exhaust gas outlet is located on the side of the exhaust gas chamber. The high-temperature waste heat vapor entering from the exhaust gas inlet can diffuse from the middle to the surrounding area, making full contact with the evaporation section of the heat pipe and improving the heat exchange efficiency.
[0013] Preferably, the exhaust gas chamber is divided by a guide plate to form a spiral flow channel extending from the middle to the side. The heat pipes are evenly arranged along the spiral flow channel, so that the high-temperature waste heat vapor can flow rapidly along the spiral flow channel and be smoothly discharged from the exhaust gas outlet. This can increase the heat exchange time between the hot exhaust gas and the evaporation section of the heat pipe, and maximize the utilization of the energy in the heat source.
[0014] Preferably, the bottom of the exhaust gas chamber is connected to a drain port, which can promptly discharge the condensed liquid wastewater in the exhaust gas chamber to avoid affecting the heat exchange efficiency.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] The evaporation chamber, exhaust gas chamber, and pressure stabilization system are integrated into a compact structure that can be installed as a whole. The exhaust gas inlet is used to connect to high-temperature waste heat steam to make full use of the residual heat. The heat pipes are numerous and evenly distributed, allowing for simultaneous heat absorption and release, resulting in high heat exchange efficiency and flexible control of the evaporation temperature. Attached Figure Description
[0017] Figure 1 This is an overall cross-sectional view of an embodiment of the present utility model;
[0018] Figure 2 This is a schematic diagram of the exhaust gas chamber guide plate according to an embodiment of this utility model.
[0019] Figure label:
[0020] 1. Pressure stabilizing system; 11. Porous media material; 12. Liquid storage tank; 13. Third partition; 14. Third partition; 15. Second partition; 16. Steam outlet; 2. Evaporation chamber; 3. Heat pipe; 31. Condensation section; 32. Evaporation section; 4. Fourth partition; 5. Exhaust gas outlet; 6. Air guide plate; 7. Exhaust gas inlet; 8. Drain outlet; 9. Exhaust gas chamber; 10. Fifth partition. Detailed Implementation
[0021] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0022] The following is a reference appendix. Figures 1 to 2 This invention describes an evaporator regulator for an organic Rankine cycle system according to an embodiment of the present invention. The organic Rankine cycle system is a thermodynamic cycle system that uses an organic working fluid to convert thermal energy into mechanical energy. The evaporator is a device that realizes the transformation of the organic working fluid from a liquid to a gaseous state, allowing the working fluid to absorb heat from an external heat source.
[0023] Specifically, the evaporator voltage regulator of this utility model embodiment includes: an evaporation chamber 2 and a waste gas chamber 9 arranged vertically and separately, a steam outlet 16 connected to the evaporation chamber 2, a voltage stabilizing system 1 arranged between the evaporation chamber 2 and the steam outlet 16, and an organic working fluid filled inside the evaporation chamber 2; heat pipes 3, evenly distributed within the evaporator voltage regulator, and each heat pipe 3 includes a condensation section 31 located in the evaporation chamber 2 and an evaporation section 32 located in the waste gas chamber 9; a waste gas inlet 7 and a waste gas outlet 5, both connected to the waste gas chamber 9, integrating the evaporation chamber 2, the waste gas chamber 9, and the voltage stabilizing system 1 together, with a compact structure that can be installed as a whole. The waste gas inlet 7 is used to connect to high-temperature waste heat steam to fully utilize the residual heat. The numerous and evenly arranged heat pipes 3 allow for simultaneous heat absorption and release, resulting in high heat exchange efficiency and flexible control of the evaporation temperature.
[0024] Specifically, in this embodiment, the evaporative pressure regulator can be a single tank, internally divided into upper and lower layers. The upper layer is the evaporation chamber 2, where the organic working fluid can vaporize to produce saturated steam under the heating of heat pipe 3. The lower layer is the waste gas chamber 9, through which high-temperature waste heat steam is introduced. This high-temperature waste steam can fully exchange heat with heat pipe 3, reducing its temperature while simultaneously heating it. Common organic working fluids include R123, R134a, R245fa, pentane, and isopentane. For example, R123 has a low critical temperature and pressure, making it suitable for medium- and low-temperature heat sources; pentane has a low boiling point, enabling higher cycle efficiency under low-temperature heat sources.
[0025] The pressure stabilizing system 1 is used to control the discharge pressure of the high-temperature steam generated by the organic working fluid. After the high-temperature steam is discharged, it enters the turbine (or expander) to expand and do work, converting thermal energy into mechanical energy. Therefore, the stable gas pressure entering the turbine (or expander) can improve the stability of power generation.
[0026] In this embodiment, the pressure stabilizing system 1 includes a pipeline connecting the steam outlet 16 and the evaporation chamber 2. A pressure gauge and a solenoid valve are installed on the pipeline. The pressure gauge can monitor the steam pressure in the pressure stabilizing system in real time. After the pressure reaches the set value, the solenoid valve opens and the steam is discharged from the steam outlet 16, making the power generation of the organic Rankine cycle system relatively stable. The pressure stabilizing system 1 can be installed at the top of the tank, inside the tank cover. The pressure gauge can be an electronic pressure gauge, which monitors the pressure when high-temperature and high-pressure steam passes through. A specific pressure set value can be set through an external controller. The solenoid valve can be a conventional electrically controlled solenoid valve, which is controlled in a unified manner with the pressure gauge.
[0027] In the aforementioned pressure stabilizing system 1, the evaporation chamber 2 is separated from the pressure stabilizing system 1 by a first partition 13, so that the steam in the evaporation chamber 2 will not randomly enter the pressure stabilizing system 1.
[0028] Meanwhile, a second partition 15 extending towards the exhaust gas chamber 9 is provided in the middle of the third partition 13. A third partition 14 connected to the bottom of the evaporation chamber 2 is provided around the second partition 15. The space between the third partition 14 and the second partition 15, as well as the space inside the second partition 15, forms a steam guiding channel connected to the pressure stabilizing system 1. The heated organic working fluid generates saturated steam, which can enter the pressure stabilizing system 1 along the steam guiding channel. The steam flow efficiency is high, and the saturated steam is further heated after being guided by the third partition 14 to form superheated high-pressure steam, which can improve the utilization of waste heat. Specifically, the second partition 15 can be arranged in a cylindrical or square shape. A gap is left between the lower end of the second partition 15 and the bottom of the evaporation chamber 2. The arrangement shape of the third partition 14 can be the same as that of the second partition 15. Heat pipes 3 can also be set within the area enclosed by the second partition 15 and the third partition 14. The evaporation chamber 2 outside the third partition 14 can be defined as the outer circular evaporation zone. The organic working fluid is concentrated in the outer circular evaporation zone. The heat pipes 3 heat the organic working fluid to form saturated steam. The saturated steam flows upward and passes through the third partition 14 before flowing downward and entering the inner circular superheated zone enclosed by the third partition 14. It is further heated by the heat pipes 3 to form high-pressure steam, and then enters the channel enclosed by the second partition 15 from bottom to top, smoothly entering the pressure stabilizing system 1.
[0029] In this embodiment, fins are provided on the outer wall of the evaporation section 32 of the heat pipe 3, which can improve the heat absorption efficiency of the evaporation section 32. Fins can also be selectively provided on the evaporation section 32, and the shape of the fins can be selected as needed, such as straight fins, corrugated fins, spiral fins, etc.
[0030] To effectively separate the evaporation chamber 2 and the exhaust gas chamber 9, a fourth partition 4 and a fifth partition 10 are provided between them. A porous medium material 11 is filled between the fourth partition 4 and the fifth partition 10. The heat pipe 3 passes through the fourth partition 4 and the fifth partition 10. The porous medium material 11 can effectively prevent liquid organic working fluid from entering the exhaust gas chamber 9. Simultaneously, the porous medium material has a large specific surface area and good thermal conductivity, which can increase the heat transfer area and heat transfer efficiency between the evaporation chamber and the exhaust gas chamber. A sealing structure is required between the heat pipe 3 and the fourth partition 4 and the fifth partition 10. Conventional sealing rings or sealants can be used for sealing. The porous medium material can be selected as needed, such as metal foam, sintered metal powder, ceramic porous materials, etc.
[0031] In this embodiment, a storage tank 12 for storing organic working fluid is connected to one side of the evaporation chamber 2. The pressure of steam can be controlled by controlling the flow rate of the organic working fluid input into the evaporation chamber 2 through the storage tank 12. A flow control valve for adjusting the flow rate of the organic working fluid can be installed in the storage tank 12. A liquid level sensor can be installed in the evaporation chamber 2. The opening and closing of the flow control valve is controlled according to the value of the liquid level sensor, thereby adjusting the flow rate of the organic working fluid and thus controlling the pressure of steam.
[0032] In this embodiment, the exhaust gas inlet 7 is located in the middle of the exhaust gas chamber 9, and the exhaust gas outlet 5 is located on the side of the exhaust gas chamber 9. The high-temperature waste heat vapor entering from the exhaust gas inlet 7 can diffuse from the middle to the surrounding area and fully contact the evaporation section 32 of the heat pipe 3, thereby improving the heat exchange efficiency.
[0033] As an alternative, such as Figure 2 As shown, the exhaust gas chamber 9 is divided by the air guide plate 6 to form a spiral flow channel extending from the middle to the side. The heat pipe 3 is evenly arranged along the spiral flow channel, so that the high-temperature waste heat vapor can flow rapidly along the spiral flow channel and be smoothly discharged from the exhaust gas outlet 5. This can increase the heat exchange time between the hot exhaust gas and the evaporation section 32 of the heat pipe 3, and maximize the utilization of the energy in the heat source.
[0034] Meanwhile, the bottom of the exhaust gas chamber 9 is connected to a drain port 8, which can discharge the condensed liquid wastewater in the exhaust gas chamber 9 in a timely manner to avoid affecting the heat exchange efficiency.
[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0038] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0039] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0040] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.
Claims
1. An evaporation pressure stabilizer for an organic Rankine cycle system, characterized by, The utility model relates to a kind of steam generator, including: The evaporation cavity (2) is connected with steam outlet (16) in upper and lower partition arrangement, and pressure stabilizing system (1) is arranged between the evaporation cavity (2) and steam outlet (16), and the evaporation cavity (2) is filled with organic working medium inside; Heat pipe (3) is evenly distributed in evaporation pressure stabilizer, and the heat pipe (3) includes condensation section (31) in evaporation cavity (2) and evaporation section (32) in waste gas cavity (9); Waste gas inlet (7) and waste gas outlet (5) are connected with waste gas cavity (9).
2. The vaporization pressure stabilizer for an organic Rankine cycle system according to claim 1, characterized by, The pressure stabilizing system (1) includes pipeline for communicating steam outlet (16) and evaporation cavity (2), and pressure monitoring meter and electromagnetic valve are arranged on the pipeline.
3. The vaporization pressure stabilizer for an organic Rankine cycle system according to claim 2, characterized by, The evaporation cavity (2) and pressure stabilizing system (1) are separated by first baffle (13).
4. The vaporization pressure stabilizer for an organic Rankine cycle system according to claim 3, characterized by, The middle part of the first baffle (13) is provided with second baffle (15) extending to waste gas cavity (9), and the periphery of the second baffle (15) is provided with third baffle (14) connected with the bottom of evaporation cavity (2), and the space between the third baffle (14) and second baffle (15) and the space inside the second baffle (15) form steam guiding channel connected with pressure stabilizing system (1).
5. The vaporizer pressure regulator for an organic Rankine cycle system according to any one of claims 1 to 4, characterized in that, The outer wall of evaporation section (32) of the heat pipe (3) is provided with fin.
6. The vaporization pressure stabilizer for an organic Rankine cycle system according to claim 5, characterized by The fourth baffle (4) and fifth baffle (10) are arranged between the evaporation cavity (2) and waste gas cavity (9), and the fourth baffle (4) and fifth baffle (10) are filled with porous medium material (11), and the heat pipe (3) is arranged on the fourth baffle (4) and fifth baffle (10).
7. The vaporization pressure stabilizer for an organic Rankine cycle system according to claim 5, characterized by, The side of the evaporation cavity (2) is connected with liquid storage tank (12) for storing organic working medium.
8. The vaporization pressure stabilizer for an organic Rankine cycle system according to claim 6, characterized by, The waste gas inlet (7) is arranged in the middle part of waste gas cavity (9), and the waste gas outlet (5) is arranged in the side part of waste gas cavity (9).
9. The vaporizer pressure stabilizer for an organic Rankine cycle system according to claim 8, characterized by, The waste gas cavity (9) is divided into spiral flow channel extending from the middle part to the side part by air deflector (6), and the heat pipe (3) is evenly arranged along the spiral flow channel.
10. The vaporizer pressure regulator for an organic Rankine cycle system of claim 9, wherein, The bottom of the waste gas cavity (9) is connected with blowdown (8).