CN217002069U - Air inlet temperature and humidity control system for improving efficiency of gas turbine - Google Patents
Air inlet temperature and humidity control system for improving efficiency of gas turbine Download PDFInfo
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- CN217002069U CN217002069U CN202220980455.4U CN202220980455U CN217002069U CN 217002069 U CN217002069 U CN 217002069U CN 202220980455 U CN202220980455 U CN 202220980455U CN 217002069 U CN217002069 U CN 217002069U
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Abstract
The utility model relates to an air inlet temperature and humidity control system for improving the efficiency of a combustion engine. The heating tube bundle is connected with a heating medium supply pipe and a heating medium return pipe through an inlet valve and an outlet valve; the cooling tube bundle is connected with a cooling medium supply pipe and a cooling medium return pipe through an inlet and outlet valve. The utility model realizes double functions of air inlet cooling and temperature increasing of the gas turbine by switching the valve, realizes broadband control of the air inlet temperature of the gas turbine, has obvious effect of improving the output of the gas turbine or a combined cycle unit, and can ensure that the gas turbine can efficiently run in the whole life cycle under the conditions of full year, full load and variable working conditions.
Description
Technical Field
The utility model relates to an air temperature and humidity regulating and controlling system, in particular to an air inlet temperature and humidity control system for improving the efficiency of a combustion engine.
Background
The gas turbine is a heat energy power machine with internal combustion and continuous rotation using air and natural gas as working medium, belonging to a power equipment with constant volume flow. The air is mostly taken from the open circulation of the atmosphere. The factors influencing the output of the gas turbine mainly comprise the following aspects: intake air temperature, altitude, air humidity, intake and exhaust pressure losses, etc., in addition to fuel type and combustion initial temperature. The inlet air temperature, poster height, inlet air and exhaust losses are influenced virtually by the actual mass flow of the intake air of the gas turbine. There are two methods for increasing the output and thermal efficiency of a combustion engine: one is to increase the initial combustion temperature and the other is to decrease the inlet air temperature of the gas turbine. The temperature ratio represents the ratio of the initial combustion temperature of the combustion engine to the intake air temperature of the combustion engine, the specific work and the thermal efficiency of the unit can be improved as long as the temperature ratio is increased, and the thermal efficiency of the unit is the same as long as the temperature ratio is the same. However, the influence degree of the increase of the initial combustion temperature of the combustion engine by 1K and the decrease of the intake temperature of the combustion engine by 1K on the thermal efficiency of the unit are different. For example, the initial combustion temperature of the engine =1000K, the intake air temperature of the engine =280K, the pressure ratio is equal to 3.57, if the intake air temperature of the engine drops by 1K, the pressure ratio becomes 3.584, and to achieve the same pressure ratio, the initial combustion temperature of the engine needs to rise by 3.6K. Therefore, the influence degree of the air inlet temperature of the combustion engine on the efficiency of the combustion engine is much larger than the influence of the initial temperature of the gas. Reducing the inlet temperature of a combustion engine is a more practical and effective way to improve the performance of a combustion engine.
The relevant literature reports that the increase of the ambient temperature by 1 ℃ can maximally reduce the rated power generation capacity of the gas turbine by 1%. The applicant carries out practical tests on a certain gas turbine in Huizhou, when the gas inlet temperature of the gas turbine is 34 ℃ in 8 months, the active load of the gas turbine is 31.0MW and the natural gas flow is 1.9kg/s, and when the gas inlet temperature of the gas turbine is 10 ℃ in winter, the active load of the gas turbine is 37.8MW and the natural gas flow is 2.2kg/s, the power generation is improved by 21.9%. Theoretical research and actual measurement data show that the degradation of the inlet air temperature of the gas turbine can improve the generating efficiency of a unit and reduce the emission of Nox and the pollution to the environment.
At present, the technology of cooling the inlet air of the combustion engine does not draw enough attention, and almost all newly-built combustion engine power stations are not directly designed and provided with an inlet air cooling system. The current technical measures mainly comprise: firstly, a simple cooling mode is adopted, such as a direct contact evaporative cooling technology. The technology has a good effect only in dry weather in dry areas, but has a very limited cooling effect in high-humidity areas or high-humidity weather environments; on the other hand, in this way, the nozzle caliber is only a few microns, the requirement on water quality is high, and demineralized water must be used to prevent scaling, so the operation cost is too high. Second, a simple series cooler is placed in front of the filter, and the intake filter is used to filter the condensed water. By adopting the structure, although the engineering modification amount is small, the resistance of the surface cooler is reduced, the load of the air inlet filter is heavy, the air inlet filter is easy to block, and the air inlet channel is easy to freeze when the temperature is lower than the environmental temperature below 5 ℃ in winter. After the resistance drop is increased, the air inflow of the combustion engine is reduced, so that the aim of improving the air suction mass flow cannot be achieved substantially. Thirdly, the existing air inlet cooling technology is suitable for a simple cycle unit and a distributed energy station unit without a steam turbine configuration, for a combined cycle unit, air inlet cooling can increase the output of the unit, but the air consumption can be increased, the unit efficiency is reduced, and for a unit with fixed total annual generated energy and a unit running under partial load for a long time, the air inlet temperature needs to be increased instead at low ambient temperature, so that the unit efficiency is improved. At present, no finned tube heat exchanger simultaneously realizing the functions of air inlet cooling and heating exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an air inlet temperature and humidity control system for improving the efficiency of a combustion engine, which has the functions of air cooling, dehumidification and temperature increase, realizes the broadband control of the air inlet temperature of the combustion engine and achieves the aim of improving the efficiency of the combustion engine.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a temperature and humidity control system admits air for promoting combustion engine efficiency, it includes the heat transfer section casing, and the heat transfer section casing is connected with gas transmission passageway, its characterized in that through the toper wind channel: a heat exchange and filtration assembly is arranged in the heat exchange section shell, and comprises a heating tube bundle, an air inlet filter and a cooling tube bundle; wherein, the heating tube bundle is connected with a heating medium supply pipe and a heating medium return pipe through an inlet and outlet valve; the cooling tube bundle is connected with a cooling medium supply pipe and a cooling medium return pipe through an inlet and outlet valve.
Preferably, the top and the bottom of the cooling tube bundle are respectively provided with a cooling tube bundle air release port and a cooling tube bundle sewage discharge port.
Preferably, the tube outer sides of the heating tube bundle and the cooling tube bundle are both provided with fins; the fin spacing is more than or equal to 4 mm.
Preferably, the cooling medium supply pipe of the cooling tube bundle is connected to the lower portion of the cooling tube bundle, and the cooling medium return pipe is connected to the upper portion of the cooling tube bundle.
Preferably, the gas transmission channel is provided with a channel temperature sensor for detecting the temperature in the gas transmission channel.
Preferably, a rain shield and an ambient temperature sensor are respectively mounted at the head end of the heat exchange section shell.
Preferably, the front end of the heat exchange section shell is provided with an air inlet regulating valve.
Preferably, the heating tube bundle, the air inlet filter and the cooling tube bundle are arranged in sequence from front to back; the heat exchange section shell comprises a gravity settling section which is positioned behind the heat exchange and filter assembly.
Further preferably, the control system further comprises a water pan installed at the bottom end inside the heat exchange section shell; the water receiving area of the water receiving tray spans the cooling tube bundle and the gravity settling section.
The utility model has the positive effects that:
through valve switching, the dual functions of air inlet cooling and temperature increasing of the gas turbine are realized, the broadband control of the air inlet temperature of the gas turbine is realized, the effect of improving the output of the gas turbine or a combined cycle unit is obvious, and the high-efficiency operation of the gas turbine in the whole life cycle under the conditions of all years, all loads and variable working conditions can be ensured. The utility model also has the following characteristics:
firstly, the gravity settling section is reserved in the heat exchange section shell behind the tube bundle, so that gas-water separation can be better realized, and the aim of air dehumidification is fulfilled. And secondly, the cooling tube bundle adopts a liquid supply mode of an in-tube flow path with lower supply and upper return, and the influence of gas entrainment on the flow path distribution uniformity can be reduced no matter cold water or a refrigerant is used as a cold source. And thirdly, a drain outlet is arranged at the bottom of the cooling tube bundle to ensure the cleanness of a cold source, and a gas release port is arranged at the top to prevent the non-condensable gas from influencing heat exchange. Fourthly, fin heat exchange tubes are adopted on the outer sides of the tubes of the tube bundles, the heat exchange area outside the tubes is expanded, the heat resistance inside and outside the tubes is balanced, and the heat exchange quantity of air in unit volume is improved; the fin interval reasonable in design is guaranteeing under heat exchange efficiency's the prerequisite, can effectively prevent that the condensate water from forming the water bridge between adjacent fin.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure, 1, a rain shield; 2. an intake air filter; 3. cooling the tube bundle; 3-1, cooling tube bundle air release ports; 3-2, a cooling pipe bundle drain outlet; 4. a heat exchange section housing; 4-1, a gravity settling section; 5. a tapered air duct; 6. a channel temperature sensor; 7. a gas transmission channel; 8. a water pan; 9. a support; 10. an intake air regulating valve; 11. a heating tube bundle; 12. an ambient temperature sensor.
Detailed Description
The utility model is further illustrated by the following figures and examples.
Referring to fig. 1, the embodiment of the utility model includes a heat exchange section shell 4, a rain shield 1 and an ambient temperature sensor 12 are installed at the head end of the heat exchange section shell 4, an air transmission channel 7 is connected to the tail end of the heat exchange section shell 4 through a tapered air duct 5, and a channel temperature sensor 6 for detecting the temperature in the air transmission channel 7 is installed on the air transmission channel 7.
And a heat exchange and filtering assembly is arranged in the heat exchange section shell 4 and comprises a heating tube bundle 11, an air inlet filter 2 and a cooling tube bundle 3. In this embodiment, the heating tube bundle 11, the intake filter 2, and the cooling tube bundle 3 are arranged in this order from front to back. In further embodiments, the front-to-back order of the heating tube bundle 11, the intake air filter 2, and the cooling tube bundle 3 is adjustable.
The tail part of the heat exchange section shell 4 is provided with a gravity settling section 4-1 which is positioned behind the heat exchange and filtration assembly, and the purpose of reserving the gravity settling section 4-1 is as follows: the liquid formed by the cold condensation is separated from the settling section, so as to achieve the aim of air dehumidification.
The embodiment of the utility model also comprises a water pan 8 arranged at the bottom end in the heat exchange section shell 4, and a water receiving area of the water pan 8 spans the cooling tube bundle 3 and the gravity settling section 4-1. The water pan 8 is connected to a drain pipe which can enter from the open end of the heat exchange section housing 4 or can enter through the wall plate of the heat exchange section housing 4.
The top and the bottom of the cooling tube bundle 3 are respectively provided with a cooling tube bundle air outlet 3-1 and a cooling tube bundle sewage outlet 3-2.
Wherein, the heating tube bundle 11 is connected with a heating medium (such as steam or other heat source) supply pipe and a heating medium return pipe through an inlet and outlet valve thereof. The cooling tube bundle 3 is connected through its inlet and outlet valves to a cooling medium (e.g., cold water or refrigerant) supply pipe and a cooling medium return pipe. The supply and return conduits may enter from the open end of the heat exchanger section housing 4 or may enter through the walls of the heat exchanger section housing 4. In the present embodiment, as an optimized scheme, the cooling medium supply pipe of the cooling pipe bundle 3 is connected to the lower part of the cooling pipe bundle 3, the cooling medium return pipe is connected to the upper part of the cooling pipe bundle 3, and an in-pipe flow path liquid supply mode of supplying liquid from the lower part to the upper part is adopted.
The outer sides of the heating tube bundle 11 and the cooling tube bundle 3 are both provided with fins for expanding the heat exchange area outside the tubes and balancing the heat resistance inside and outside the tubes, thereby improving the heat exchange quantity of air in unit volume; the fin spacing is more than or equal to 4 mm.
And an air inlet adjusting valve 10 is also installed at the head end of the heat exchange section shell 4.
The heat exchanger section shell 4 and the gas transfer passage 7 are typically seated on a support 9.
Example workflow: when the inlet air of the gas turbine needs to be heated, the inlet and outlet valves of the heating tube bundle 11 are opened, the inlet and outlet valves of the cooling tube bundle 3 are closed, water vapor or other heat sources flow through the heat exchange tubes of the heating tube bundle 11, the air outside the shell of the heat exchange section is heated, and the outlet temperature of the air is adjusted by automatically adjusting the opening of the inlet valve of the heating tube bundle 11. When the inlet air of the combustion engine needs to be cooled, the inlet and outlet valves of the cooling tube bundle 3 are opened, the inlet and outlet valves of the heating tube bundle 11 are closed, a refrigerant (cold water or refrigerant) flows through the inner sides of the tubes of the cooling tube bundle 3, the air outside the shell of the heat exchange section is cooled, and the outlet temperature of the air is adjusted by automatically adjusting the opening degree of the inlet valve of the cooling tube bundle 3. The ambient temperature is detected by the ambient temperature sensor 12, so that the opening and closing of the valves of the heating tube bundle 11 and the cooling tube bundle 3 and the opening control are realized. Ambient air as air inlet of the combustion engine sequentially flows through the rain shield 1, the heating tube bundle 11, the air inlet filter 2, the cooling tube bundle 3, the gravity settling section 4-1, the conical air duct 5 and the air conveying channel 7 to enter an air inlet of the combustion turbine. The amount of air supplied to the internal combustion engine per unit time is adjusted by adjusting the opening degree of the intake air adjusting valve 10.
Claims (9)
1. A inlet air temperature and humidity control system for promoting combustion engine efficiency, it includes heat transfer section casing (4), and heat transfer section casing (4) are connected with gas transmission passageway (7), its characterized in that through toper wind channel (5): a heat exchange and filtration assembly is arranged in the heat exchange section shell (4), and comprises a heating tube bundle (11), an air inlet filter (2) and a cooling tube bundle (3); wherein, the heating tube bundle (11) is connected with a heating medium supply pipe and a heating medium return pipe through an inlet and outlet valve; the cooling tube bundle (3) is connected with a cooling medium supply pipe and a cooling medium return pipe through an inlet and outlet valve.
2. The intake air temperature and humidity control system for improving the efficiency of a combustion engine as set forth in claim 1, wherein: the top and the bottom of the cooling tube bundle (3) are respectively provided with a cooling tube bundle air outlet (3-1) and a cooling tube bundle sewage outlet (3-2).
3. The intake air temperature and humidity control system for increasing the efficiency of a combustion engine according to claim 1, wherein: the outer sides of the heating tube bundle (11) and the cooling tube bundle (3) are both provided with fins; the fin spacing is more than or equal to 4 mm.
4. The intake air temperature and humidity control system for improving the efficiency of a combustion engine as set forth in claim 1, wherein: the cooling medium supply pipe of the cooling pipe bundle (3) is connected to the lower part of the cooling pipe bundle (3), and the cooling medium return pipe is connected to the upper part of the cooling pipe bundle (3).
5. The intake air temperature and humidity control system for improving the efficiency of a combustion engine as set forth in claim 1, wherein: a channel temperature sensor (6) for detecting the temperature in the gas transmission channel (7) is arranged on the gas transmission channel (7).
6. The intake air temperature and humidity control system for improving the efficiency of a combustion engine as set forth in claim 1, wherein: the head end of the heat exchange section shell (4) is respectively provided with a rain shield (1) and an ambient temperature sensor (12).
7. The intake air temperature and humidity control system for improving the efficiency of a combustion engine as set forth in claim 1, wherein: the front end of the heat exchange section shell (4) is provided with an air inlet adjusting valve (10).
8. The intake air temperature and humidity control system for improving the efficiency of a combustion engine according to any one of claims 1 to 7, wherein: the heating tube bundle (11), the air inlet filter (2) and the cooling tube bundle (3) are sequentially arranged from front to back; the heat exchange section shell (4) comprises a gravity settling section (4-1) which is positioned behind the heat exchange and filtration assembly.
9. The intake air temperature and humidity control system for improving the efficiency of a combustion engine as set forth in claim 8, wherein: the control system also comprises a water pan (8) arranged at the bottom end in the heat exchange section shell (4); the water receiving area of the water receiving tray (8) spans the cooling tube bundle (3) and the gravity settling section (4-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220980455.4U CN217002069U (en) | 2022-04-26 | 2022-04-26 | Air inlet temperature and humidity control system for improving efficiency of gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220980455.4U CN217002069U (en) | 2022-04-26 | 2022-04-26 | Air inlet temperature and humidity control system for improving efficiency of gas turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217002069U true CN217002069U (en) | 2022-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220980455.4U Active CN217002069U (en) | 2022-04-26 | 2022-04-26 | Air inlet temperature and humidity control system for improving efficiency of gas turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217002069U (en) |
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2022
- 2022-04-26 CN CN202220980455.4U patent/CN217002069U/en active Active
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