Gas turbine air intake cold and hot double-effect integrated heat exchange device
By employing a dual-effect integrated heat exchanger in the gas turbine intake system, and utilizing a finned tube heat exchanger and a temperature and humidity sensor control system, the problems of filter element ice blockage and wet blockage in traditional systems have been solved. This has enabled efficient intake air treatment and stable operation of the gas turbine, while reducing equipment complexity and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU FENGXING POWER TECH CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-06-19
AI Technical Summary
In traditional gas turbine intake treatment systems, the anti-icing system heater is placed after the filter element, which cannot solve the problems of ice blockage and wet blockage of the filter element, and the unreasonable heating conditions lead to energy waste; the cooler is placed in front of the filter element, which is prone to wet blockage in high temperature and high humidity environment, lacks precise temperature control, and has poor cooling effect; the independent setting of the anti-icing and cooling systems leads to high equipment complexity and increased cost.
The gas turbine inlet air cooling and heating dual-effect integrated heat exchange device is adopted, which uses the same finned tube heat exchanger to realize heating and cooling functions. Hot water or cold water is generated through waste heat boiler and absorption chiller. Combined with temperature and humidity sensors and control system, the inlet air temperature can be precisely regulated to prevent filter element wet blockage and ice blockage, and improve the output and efficiency of gas turbine.
It achieves efficient intake air treatment under different climatic conditions, prevents filter element wet and ice blockage, improves gas turbine output and efficiency, reduces fuel consumption and NOx emissions, simplifies equipment structure, and reduces costs.
Smart Images
Figure CN224379965U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas turbine intake air treatment technology, and in particular to a gas turbine intake air cooling and heating dual-effect integrated heat exchange device. Background Technology
[0002] Currently, gas turbine inlet treatment technology improves operational safety and turbine output and efficiency through anti-icing and cooling systems. Inlet anti-icing technology effectively prevents filter blockage due to moisture and ice in cold and humid regions, ensuring stable gas turbine operation. Inlet cooling technology, by reducing inlet air temperature, increases gas turbine output, reduces fuel consumption and NOx emissions, and meets power generation demands during hot seasons. For example, some systems combine finned tube heat exchangers with large refrigerators to cool the inlet air and improve performance.
[0003] However, firstly, traditional anti-icing systems place the heater after the filter element, which cannot solve the problems of ice blockage and wet blockage of the filter element, and the heating conditions are not set properly, resulting in energy waste; secondly, the cooler is usually placed before the filter element, which is prone to wet blockage of the filter element in high temperature and high humidity environments, and lacks precise temperature control, resulting in poor cooling effect and low economy; finally, the anti-icing and cooling systems are set up independently, and it is impossible to achieve dual-effect switching between cold and heat through a single heat exchanger, resulting in high equipment complexity and increased cost. Utility Model Content
[0004] The purpose of this invention is to provide a dual-effect integrated heat exchange device for gas turbine intake air, aiming to solve the following problems in the prior art: First, traditional anti-icing systems place the heater after the filter element, which cannot solve the problems of ice blockage and wet blockage of the filter element, and the heating conditions are not set reasonably, resulting in energy waste. Second, coolers are mostly placed before the filter element, which can easily cause wet blockage of the filter element in high temperature and high humidity environments, and lack precise temperature control, resulting in poor cooling effect, low economy, and even condensation that wets the filter element, making the gas turbine unable to operate. Finally, the anti-icing and cooling systems operate independently, and it is impossible to achieve dual-effect switching of cold and heat through a single heat exchanger, resulting in economic and technical problems such as high equipment complexity and increased cost.
[0005] To achieve the above objectives, this utility model employs a gas turbine intake cooling and heating dual-effect integrated heat exchange device, comprising the essential gas turbine, housing, load, housing exhaust fan, intake system housing, and intake filter element. The gas turbine is disposed within the housing, the load is disposed at the end of the housing away from the gas turbine, the housing exhaust fan is disposed in the middle of the housing, the intake system housing is disposed on the housing, and the intake filter element is disposed on the intake system housing. It also includes newly added components such as a waste heat boiler, an absorption chiller, a finned tube heat exchanger, a first shut-off valve, a second shut-off valve, a hot water circulation pump, a first shut-off valve, a second shut-off valve, a third shut-off valve, a fourth shut-off valve, a fifth shut-off valve, a hot water flow regulating valve, a cold water circulation pump, a cold water flow regulating valve, a control system, an outdoor temperature and humidity sensor, an indoor temperature and humidity sensor, and a simple weather station. The finned tube heat exchanger is equipped with an inlet water pipeline and a return water pipeline.
[0006] The finned tube heat exchanger is installed upstream of the air intake filter element within the air intake system housing. The inlet of the hot water circulating pump is connected to the outlet of the waste heat boiler hot water via the first shut-off valve, and the outlet of the waste heat boiler hot water is connected to the inlets of the first and second shut-off valves. The outlet of the heat exchanger is connected to the inlets of the second shut-off valve, the third shut-off valve, the fourth shut-off valve, and the fifth shut-off valve, and the outlet of the fourth shut-off valve is connected to the inlet of the waste heat boiler hot water. The inlet of the hot water flow regulating valve is connected to the inlets of the first and second shut-off valves, and the outlet of the hot water flow regulating valve is connected to the inlet of the finned tube heat exchanger. The pipelines are connected; the inlet of the second shut-off valve is connected to the outlet of the hot water circulation pump, and the outlet of the second shut-off valve is connected to the hot water inlet of the absorption chiller; the inlet of the third shut-off valve is connected to the return water end of the absorption chiller, and the outlet of the third shut-off valve is connected to the return water pipeline of the finned tube heat exchanger; the inlet of the cold water circulation pump is connected to the outlet of the absorption chiller, the outlet of the cold water circulation pump is connected to the inlet of the cold water flow regulating valve, and the outlet of the cold water flow regulating valve is connected to the inlet water pipeline of the finned tube heat exchanger; the outdoor temperature and humidity sensor is installed inside the simple weather station, and the indoor temperature and humidity sensor is installed inside the air intake system housing.
[0007] To achieve the above objectives, it is also necessary to implement intelligent and precise control over the start / stop conditions of intake air heating and intake air cooling, as well as the temperature control amplitude of intake air heating and intake air cooling.
[0008] The control system is electrically connected to the absorption chiller, the first shut-off valve, the second shut-off valve, the third shut-off valve, the fourth shut-off valve, the fifth shut-off valve, the hot water circulation pump, the cold water circulation pump, the hot water flow regulating valve, the cold water flow regulating valve, the outdoor temperature and humidity sensor, and the indoor temperature and humidity sensor via wires.
[0009] The control system closes the second, third, and fifth shut-off valves and opens the first and fourth shut-off valves. It starts the hot water circulation pump, and the hot water flow regulating valve slowly opens from 0% to 100% at a fixed rate. Hot water heats the intake air through the finned tube heat exchanger, and the intake air in the intake chamber is in a state of constant humidity heating. The temperature / humidity sensor measures that T2 slowly rises and Φ2 slowly falls. When T2-T1=4~5℃, the hot water flow regulating valve remains fixed at a designated position, and the system enters the moisture-proof and ice-proof state of the intake filter.
[0010] The control system closes the first shut-off valve, the second shut-off valve, the third shut-off valve, the fourth shut-off valve, and the fifth shut-off valve, stopping the operation of the hot water circulation pump. The hot water flow regulating valve slowly returns from a fixed position to its original state at a fixed rate, stopping the hot water from heating the intake air through the finned tube heat exchanger.
[0011] The control system closes the first, fourth, and fifth shut-off valves and opens the second and third shut-off valves. It starts the absorption chiller and the chilled water circulation pump. The chilled water flow regulating valve slowly opens from 0% to 100% at a fixed rate. Chilled water cools the intake air through the finned tube heat exchanger, resulting in an isohumid cooling state for the intake air. The indoor temperature and humidity sensor measures a slow decrease in T2 and a slow increase in Φ2. When Φ2 slowly rises to 85%RH, the chilled water flow regulating valve remains fixed at a specified position, and the system enters the intake air cooling state. Depending on the value of Φ1, the intake air temperature can be reduced by 3-10℃.
[0012] The control system closes all shut-off valves, stops the operation of the chilled water circulation pump and the absorption chiller, and the chilled water flow regulating valve slowly returns to its original state from a fixed position at a fixed rate. At the same time, the system performs self-checks and fault diagnosis.
[0013] This invention relates to a dual-effect integrated heat exchange device for gas turbine intake air. Utilizing a single finned tube heat exchanger, it achieves both heating and cooling functions for the gas turbine intake air. The device mainly consists of a gas turbine, a housing, a load, an exhaust fan for the housing, an intake system shell, an intake filter, a waste heat boiler, an absorption chiller, the finned tube heat exchanger, and related pipelines, valves, pumps, sensors, and a control system. Through different operating conditions and control strategies, it achieves precise regulation of the intake air temperature. In heating mode, when the outdoor temperature and humidity sensor detects an atmospheric dry-bulb temperature below 35°C and a relative humidity above 85-90%, the device can achieve precise regulation of the intake air temperature. At time H, the system automatically enters the intake air heating mode, using hot water generated by the waste heat boiler to heat the intake air through a finned tube heat exchanger, preventing wet and ice blockage of the intake air filter. During the heating process, the heating amount is precisely controlled by a hot water flow regulating valve to ensure that the intake air temperature rise is within the range of 4~5℃, achieving the best anti-moisture and anti-icing effect. In cooling mode, when the outdoor temperature and humidity sensor detects that the atmospheric dry-bulb temperature is higher than 35℃ and the relative humidity is lower than 75~80%RH, the system automatically switches to intake air cooling mode, using chilled water generated by the absorption chiller to cool the intake air through a finned tube heat exchanger, improving gas turbine output and reducing fuel consumption and NO. X During the discharge and cooling process, the cooling amount is precisely controlled by the cold water flow regulating valve to ensure that the relative humidity of the intake air does not exceed 85%RH, so as to prevent condensation from causing the filter element to become wet and clogged. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the principle of the gas turbine intake air cooling and heating dual-effect integrated heat exchange device of this utility model.
[0016] Figure 2 This is a flowchart illustrating the steps of a dual-effect integrated heat exchange control method for the intake cooling and heating of a gas turbine, as described in this utility model.
[0017] 1. Gas turbine; 2. Enclosure; 3. Load; 4. Enclosure exhaust fan; 5. Intake system housing; 6. Intake filter; 7. Waste heat boiler; 8. Absorption chiller; 9. Finned tube heat exchanger; 10. Inlet water line; 11. Return water line; 12-1. First shut-off valve; 12-2. Second shut-off valve; 13. Hot water circulation pump; 14. First shut-off valve; 15. Hot water flow regulating valve; 16. Second shut-off valve; 17. Cold water circulation pump; 18. Cold water flow regulating valve; 19. Third shut-off valve; 20. Fourth shut-off valve; 21. Fifth shut-off valve; 22. Control system; 23. Outdoor temperature and humidity sensor; 24. Indoor temperature and humidity sensor; 25. Simple weather station. Detailed Implementation
[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0019] Please see Figure 1 This utility model provides a dual-effect integrated heat exchange device for the intake cooling and heating of a gas turbine, including a gas turbine 1, a housing 2, a load 3, a housing exhaust fan 4, an intake system housing 5, and an intake filter element 6. The gas turbine 1 is disposed inside the housing 2, the load 3 is disposed at one end of the housing 2 away from the gas turbine 1, the housing exhaust fan 4 is disposed in the middle of the housing 2, the intake system housing 5 is disposed on the housing 2, and the intake filter element 6 is disposed on the intake system housing 5. It also includes a new... The added components include a waste heat boiler 7, an absorption chiller 8, a finned tube heat exchanger 9, a first shut-off valve 12-1, a second shut-off valve 12-2, a hot water circulation pump 13, a first shut-off valve 14, a second shut-off valve 16, a third shut-off valve 19, a fourth shut-off valve 20, a fifth shut-off valve 21, a hot water flow regulating valve 15, a cold water circulation pump 17, a cold water flow regulating valve 18, a control system 22, an outdoor temperature and humidity sensor 23, an indoor temperature and humidity sensor 24, and a simple weather station 25. The finned tube heat exchanger 9 is equipped with an inlet water pipeline 10 and a return water pipeline 11.
[0020] In this embodiment, the outlet water temperature of the waste heat boiler 7 is not lower than 85°C. When the system is not under maintenance, the first shut-off valve 12-1 is open, and the second shut-off valve 12-2 is closed. During system maintenance, the opposite occurs: the first shut-off valve 12-1 is closed, and the second shut-off valve 12-2 is open. By integrating heating and cooling functions, the intake air treatment requirements of the gas turbine 1 under different climatic conditions are effectively solved. This prevents wet and ice blockage of the filter element, improves the output and efficiency of the gas turbine 1 during high-temperature seasons, and simultaneously reduces fuel consumption and NOx. X emission.
[0021] Further, the finned tube heat exchanger 9 is installed upstream of the air intake filter element 6 inside the air intake system housing 5; the inlet of the hot water circulation pump 13 is connected to the outlet of the hot water from the waste heat boiler 7 via the first shut-off valve 12-1, and the outlet of the hot water from the waste heat boiler 7 is connected to the inlets of the first shut-off valve 14 and the second shut-off valve 16; the outlet of the finned tube heat exchanger 9 is connected to the inlets of the second shut-off valve 12-2, the third shut-off valve 19, the fourth shut-off valve 20, and the fifth shut-off valve 21, and the outlet of the fourth shut-off valve 20 is connected to the inlet of the hot water from the waste heat boiler 7; the inlet of the hot water flow regulating valve 15 is connected to the inlet of the first shut-off valve 14 and the inlet of the second shut-off valve 16, and the outlet of the hot water flow regulating valve 15 is connected to the finned tube heat exchanger. The inlet pipe 10 of the finned tube heat exchanger 9 is connected; the inlet of the second shut-off valve 16 is connected to the outlet of the hot water circulation pump 13, and the outlet of the second shut-off valve 16 is connected to the hot water inlet of the absorption chiller 8; the inlet of the third shut-off valve 19 is connected to the return water end of the absorption chiller 8, and the outlet of the third shut-off valve 19 is connected to the return water pipe 11 of the finned tube heat exchanger 9; the inlet of the cold water circulation pump 17 is connected to the outlet of the absorption chiller 8, and the outlet of the cold water circulation pump 17 is connected to the inlet of the cold water flow regulating valve 18, and the outlet of the cold water flow regulating valve 18 is connected to the inlet pipe 10 of the finned tube heat exchanger 9; the outdoor temperature and humidity sensor 23 is installed inside the simple weather station 25, and the indoor temperature and humidity sensor 24 is installed inside the air intake system housing 5.
[0022] In this embodiment, the finned tube heat exchanger 9 is designed to directly heat or cool the air before it enters the filter element, thereby improving processing efficiency. At the same time, it avoids the problems of wet blockage and ice blockage that may occur if the finned tube heat exchanger 9 is installed after the filter element, thus ensuring the stable operation of the gas turbine 1.
[0023] Furthermore, the control system 22 is electrically connected to the absorption chiller 8, the first shut-off valve 14, the second shut-off valve 16, the third shut-off valve 19, the fourth shut-off valve 20, the fifth shut-off valve 21, the hot water circulation pump 13, the cold water circulation pump 17, the hot water flow regulating valve 15, the cold water flow regulating valve 18, the outdoor temperature and humidity sensor 23, and the indoor temperature and humidity sensor 24 via wires.
[0024] In this embodiment, the heat exchange area of the finned tube heat exchanger 9 can be determined based on the local average relative humidity value Ф1 during the high-temperature season and the outlet temperature of the absorption chiller 8, with a maximum temperature drop of 10°C; antifreeze is added to the outlet circulating water of the waste heat boiler 7.
[0025] Further, the control system 22 closes the second shut-off valve 16, the third shut-off valve 19, and the fifth shut-off valve 21, and opens the first shut-off valve 14 and the fourth shut-off valve 20; the hot water circulation pump 13 is started, and the hot water flow regulating valve 15 slowly opens from 0 to 100% at a fixed rate. Hot water heats the intake air through the finned tube heat exchanger 9, and the intake air in the intake chamber is in a state of constant humidity heating. The temperature / humidity sensor measures that T2 slowly rises and Φ2 slowly falls. When T2-T1=4~5℃, the hot water flow regulating valve 15 is fixed at the designated position, and the system enters the moisture-proof and ice-proof state of the intake filter element 6.
[0026] In this embodiment, the intake air heating of the gas turbine 1 is in a moisture-proof and ice-proof state of the intake filter element 6, and the intake filter element 6 will not be blocked by moisture or ice.
[0027] Furthermore, the control system 22 closes the first shut-off valve 14, the second shut-off valve 16, the third shut-off valve 19, the fourth shut-off valve 20, and the fifth shut-off valve 21, stops the operation of the hot water circulation pump 13, and the hot water flow regulating valve 15 slowly returns to its original state from a fixed position at a fixed rate, stopping the hot water from heating the intake air through the finned tube heat exchanger 9.
[0028] In this embodiment, the air intake filter 6 will not experience wet or ice blockage.
[0029] Further, the control system 22 closes the first shut-off valve 14, the fourth shut-off valve 20, and the fifth shut-off valve 21, and opens the second shut-off valve 16 and the third shut-off valve 19; it starts the absorption chiller 8 and the cold water circulation pump 17, and the cold water flow regulating valve 18 slowly opens from 0 to 100% at a fixed rate. The cold water cools the intake air through the finned tube heat exchanger 9, and the intake air in the intake chamber is in an isohumid cooling state. The indoor temperature and humidity sensor 24 measures that T2 slowly decreases and Φ2 slowly increases. When Φ2 slowly rises to 85%RH, the cold water flow regulating valve 18 is fixed at a specified position, and the system enters the intake air cooling state. Depending on the value of Φ1, the intake air temperature can be reduced by 3 to 10°C.
[0030] Furthermore, the control system 22 closes all shut-off valves, stops the operation of the cold water circulation pump 17 and the absorption chiller 8, and the cold water flow regulating valve 18 slowly returns to its original state from a fixed position at a fixed rate. At the same time, the system performs self-checks and fault diagnosis.
[0031] In this embodiment, if the average atmospheric temperature T1 > 35°C during the high-temperature season, but the average relative humidity Φ1 > 85%RH, the input-output ratio of intake air cooling is very low and there is no economic benefit. If the intake air temperature is forcibly reduced, although it can only be lowered by 1~2°C, a large amount of condensate will be generated, causing severe wet blockage of the intake filter element 6, which will prevent the gas turbine 1 from operating. Therefore, this utility model is not recommended for use in areas where the average temperature T1 > 35°C and the average relative humidity Φ1 > 85%RH during the high-temperature season.
[0032] Please see Figure 2 This utility model also provides a gas turbine inlet air cooling and heating dual-effect integrated heat exchange control method, applied to the gas turbine inlet air cooling and heating dual-effect integrated heat exchange device mentioned above, including the following steps:
[0033] Step S1: When the outdoor temperature and humidity sensor 23 measures an atmospheric dry-bulb temperature Ta < 35℃ and a relative humidity Φ1 > 85~90%RH, the system determines that it needs to enter the air intake heating mode.
[0034] Step S2: When the outdoor temperature and humidity sensor 23 measures an atmospheric dry-bulb temperature Ta < 35℃ and a relative humidity Φ1 < 85~90%RH, the system determines that it can exit the intake heating mode.
[0035] Step S3: When the outdoor temperature and humidity sensor 23 measures an atmospheric dry-bulb temperature Ta>35℃ and a relative humidity Φ1<75~80%RH, the system determines that it needs to enter the intake cooling mode.
[0036] Step S4: When the outdoor temperature and humidity sensor 23 measures an atmospheric dry-bulb temperature Ta>35℃ and a relative humidity Φ1>85%RH, or when the system detects other conditions that require exiting the cooling mode, the system determines that it is necessary to exit the intake cooling mode.
[0037] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.
Claims
1. A dual-effect integrated heat exchange device for cooling and heating gas turbine intake, comprising a gas turbine, a housing, a load, a housing exhaust fan, an intake system housing, and an intake filter element, wherein the gas turbine is disposed within the housing, the load is disposed at one end of the housing away from the gas turbine, the housing exhaust fan is disposed in the middle of the housing, the intake system housing is disposed on the housing, and the intake filter element is disposed on the intake system housing, characterized in that... It also includes newly added waste heat boilers, absorption chillers, finned tube heat exchangers, first shut-off valves, second shut-off valves, hot water circulation pumps, first shut-off valves, second shut-off valves, third shut-off valves, fourth shut-off valves, fifth shut-off valves, hot water flow regulating valves, cold water circulation pumps, cold water flow regulating valves, control systems, outdoor temperature and humidity sensors, indoor temperature and humidity sensors, and simple weather stations. The finned tube heat exchangers are equipped with inlet and return water pipelines.
2. The gas turbine inlet cooling and heating dual-effect integrated heat exchanger as described in claim 1, characterized in that, The finned tube heat exchanger is installed upstream of the air intake filter element inside the air intake system housing; the inlet of the hot water circulation pump is connected to the outlet of the waste heat boiler hot water through the first shut-off valve, and the outlet of the waste heat boiler hot water is connected to the inlet of the first shut-off valve and the second shut-off valve; the outlet of the heat exchanger is connected to the inlet of the second shut-off valve, the third shut-off valve, the fourth shut-off valve, and the fifth shut-off valve, and the outlet of the fourth shut-off valve is connected to the inlet of the waste heat boiler hot water; the inlet of the hot water flow regulating valve is connected to the inlet of the first shut-off valve and the inlet of the second shut-off valve, and the outlet of the hot water flow regulating valve is connected to the water inlet pipeline of the finned tube heat exchanger; The inlet of the second shut-off valve is connected to the outlet of the hot water circulation pump, and the outlet of the second shut-off valve is connected to the hot water inlet of the absorption chiller; the inlet of the third shut-off valve is connected to the return water end of the absorption chiller, and the outlet of the third shut-off valve is connected to the return water line of the finned tube heat exchanger; the inlet of the cold water circulation pump is connected to the outlet of the absorption chiller, the outlet of the cold water circulation pump is connected to the inlet of the cold water flow regulating valve, and the outlet of the cold water flow regulating valve is connected to the inlet water line of the finned tube heat exchanger; the outdoor temperature and humidity sensor is installed inside the simple weather station, and the indoor temperature and humidity sensor is installed inside the air intake system housing.
3. The gas turbine inlet cooling and heating dual-effect integrated heat exchanger as described in claim 2, characterized in that, The control system is electrically connected to the absorption chiller, the first shut-off valve, the second shut-off valve, the third shut-off valve, the fourth shut-off valve, the fifth shut-off valve, the hot water circulation pump, the cold water circulation pump, the hot water flow regulating valve, the cold water flow regulating valve, the outdoor temperature and humidity sensor, and the indoor temperature and humidity sensor via wires.
4. The gas turbine inlet cooling and heating dual-effect integrated heat exchanger as described in claim 3, characterized in that, The control system closes all shut-off valves, stops the operation of the chilled water circulation pump and the absorption chiller, and the chilled water flow regulating valve slowly returns to its original state from a fixed position at a fixed rate. At the same time, the system performs self-checks and fault diagnosis.