Gas turbine cooling system and cooling method thereof

Abstract

The invention relates to the technical field of energy, and discloses a gas turbine cooling system and a cooling method.The gas turbine cooling system comprises a lithium bromide water chilling unit, heat supply equipment, cooling equipment, a heating, ventilation and refrigeration user side and a heat exchanger used for cooling an air inlet of a gas turbine; a heat source inlet of the lithium bromide water chilling unit is connected with an outlet of the heat supply equipment; a heat source outlet of the lithium bromide water chilling unit is connected with an inlet of the heat supply equipment; a cooling water outlet of the lithium bromide water chilling unit is connected with an inlet of the cooling equipment; an outlet of the cooling equipment is connected with a cooling water inlet of the lithium bromide water chilling unit; a chilled water outlet of the lithium bromide water chilling unit is connected with an inlet of the heating, ventilation and refrigeration user side and an inlet of the heat exchanger, and an outlet of the heating, ventilation and refrigeration user side and an outlet of the heat exchanger are connected with a chilled water inlet of the lithium bromide water chilling unit.

Description

Technical Field

[0001] The invention relates to the field of energy technology, and in particular to a gas turbine cooling system and a cooling method thereof. Background Art

[0002] Gas turbine power plants have the advantages of high thermal efficiency, fast startup, strong peak load regulation and low pollution. Due to the high temperature in summer, the temperature of the gas turbine intake increases, the air density decreases, and the air mass flow entering the gas turbine decreases, so the power and efficiency of the gas turbine will be significantly reduced.

[0003] At present, in order to improve the power and efficiency of gas turbines, power plants at home and abroad usually use lithium bromide absorption refrigeration combined with air surface cooling to cool the intake air of gas turbines. However, this solution requires the addition of a complete set of lithium bromide chillers, cooling equipment, etc. on the basis of the original equipment, which has a high investment cost and occupies a large area. Summary of the invention

[0004] The purpose of the present application is to provide a gas turbine cooling system and a cooling method thereof, which does not require the addition of a new set of lithium bromide chillers. On the basis of realizing cooling for the HVAC user end, it can also realize the cooling of the gas turbine intake air, thereby reducing the investment cost and the floor space.

[0005] In order to achieve the above-mentioned object, the present invention provides a gas turbine cooling system, comprising: a lithium bromide chiller, a heating device, a cooling device, a HVAC user end, and a heat exchanger for cooling the gas turbine air inlet;

[0006] The heat source inlet of the lithium bromide chiller is connected to the outlet of the heating equipment, and the heat source outlet of the lithium bromide chiller is connected to the inlet of the heating equipment;

[0007] The cooling water outlet of the lithium bromide chiller is connected to the inlet of the cooling device, and the outlet of the cooling device is connected to the cooling water inlet of the lithium bromide chiller;

[0008] The chilled water outlet of the lithium bromide chiller is respectively connected to the inlet of the HVAC user end and the inlet of the heat exchanger, and the outlet of the HVAC user end and the outlet of the heat exchanger are both connected to the chilled water inlet of the lithium bromide chiller.

[0009] Preferably, it also includes a screw chiller;

[0010] The cooling water inlet of the screw chiller is connected to the outlet of the cooling device, and the cooling water outlet of the screw chiller is connected to the inlet of the cooling device;

[0011] The chilled water outlet of the screw chiller is connected to the inlet of the heat exchanger, and the outlet of the heat exchanger is connected to the chilled water inlet of the screw chiller.

[0012] Preferably, it also includes a screw chiller;

[0013] The cooling water inlet of the screw chiller is connected to the outlet of the cooling device, and the cooling water outlet of the screw chiller is connected to the inlet of the cooling device;

[0014] The chilled water outlet of the screw chiller is respectively connected to the inlet of the HVAC user end and the inlet of the heat exchanger, and the outlet of the HVAC user end and the outlet of the heat exchanger are both connected to the chilled water inlet of the screw chiller.

[0015] Preferably, the cooling equipment includes a cooling tower and a cooling water pump;

[0016] The inlet of the cooling tower is connected to the cooling water outlet of the lithium bromide chiller, the outlet of the cooling tower is connected to the inlet of the cooling water pump, and the outlet of the cooling water pump is connected to the cooling water inlet of the lithium bromide chiller.

[0017] Preferably, it also includes at least one set of spare cooling equipment;

[0018] The standby cooling device and the cooling device are arranged in parallel.

[0019] Preferably, the standby cooling equipment includes a standby cooling tower and a standby cooling water pump;

[0020] The standby cooling tower and the cooling tower are arranged in parallel;

[0021] The standby cooling water pump and the cooling water pump are arranged in parallel.

[0022] Preferably, a chilled water pump is connected between the HVAC / Refrigeration user-end outlet and the outlet of the heat exchanger and the chilled water inlet of the lithium bromide chiller after the outlet merges.

[0023] Preferably, it also includes at least one set of spare chilled water pumps;

[0024] The standby chilled water pump and the chilled water pump are arranged in parallel.

[0025] Preferably, a hot water return pump is connected between the heat source outlet of the lithium bromide chiller and the inlet of the heating equipment.

[0026] Preferably, it also includes at least one set of standby lithium bromide chillers;

[0027] The standby lithium bromide chiller is arranged in parallel with the lithium bromide chiller.

[0028] A cooling method based on the above-mentioned gas turbine cooling system comprises the following steps:

[0029] When the gas turbine is running at a relatively low temperature, open the inlet and outlet valves of the heating equipment, lithium bromide chiller, cooling equipment and HVAC user end, and close the inlet and outlet valves of the heat exchanger;

[0030] The outlet of the heating equipment outputs hot water to the heat source inlet of the lithium bromide chiller to provide a driving heat source, the chilled water outlet of the lithium bromide chiller outputs chilled water to the inlet of the HVAC user end to provide cooling for the HVAC user, the HVAC user end obtains hot water through heat exchange and outputs it to the chilled water inlet of the lithium bromide chiller, a part of the hot water is input from the heat source outlet of the lithium bromide chiller to the inlet of the heating equipment, and another part of the hot water is processed by the lithium bromide chiller and input to the cooling equipment for cooling to obtain cooling water, and then input to the cooling water inlet of the lithium bromide chiller;

[0031] When the gas turbine is running at a higher temperature, open the inlet and outlet valves of the heating equipment, lithium bromide chiller, cooling equipment, HVAC user end and heat exchanger;

[0032] The outlet of the heating equipment outputs hot water to the heat source inlet of the lithium bromide chiller to provide a driving heat source. The chilled water outlet of the lithium bromide chiller outputs chilled water which is divided into the inlet of the HVAC user end and the inlet of the heat exchanger to provide cooling capacity for the HVAC user and the air inlet of the gas turbine. The hot water obtained by heat exchange between the HVAC user end and the heat exchanger is output to the chilled water inlet of the lithium bromide chiller. A part of the hot water is input to the inlet of the heating equipment from the heat source outlet of the lithium bromide chiller, and another part of the hot water is processed by the lithium bromide chiller and input to the cooling equipment for cooling to obtain cooling water, which is then input to the cooling water inlet of the lithium bromide chiller.

[0033] Compared with the prior art, the gas turbine cooling system of the present application has the following beneficial effects: when the gas turbine is operated under low temperature conditions, only the lithium bromide chiller, heating equipment, cooling equipment, and HVAC user end are started, and the heat exchanger is turned off to provide cooling capacity for HVAC users for cooling;

[0034] When the gas turbine is operating at a relatively high temperature, the lithium bromide chiller, heating equipment, cooling equipment, HVAC user end and heat exchanger are started, and cold air is provided to the HVAC user and the gas turbine air inlet for cooling.

[0035] The gas turbine intake air cooling and HVAC refrigeration of the present application share a set of lithium bromide chillers and cooling equipment. Compared with the prior art, an additional set of lithium bromide chillers and cooling equipment is added. The investment cost required for the gas turbine cooling system of the present application to achieve intake air cooling is low and the floor space occupied is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of a gas turbine cooling system according to an embodiment of the present invention;

[0037] Figure 2 is a graph showing the relationship between the power and efficiency of a gas turbine and the gas turbine inlet air temperature according to an embodiment of the present invention;

[0038] Figure 3 is a schematic structural diagram of a gas turbine cooling system according to another embodiment of the present invention;

[0039] In the figure, 1. lithium bromide chiller; 2. screw chiller; 3. heating equipment; 4. cooling equipment; 41. cooling tower; 42. cooling water pump; 5. spare cooling equipment; 51. spare cooling tower; 52. spare cooling water pump; 6. HVAC user end; 7. heat exchanger; 8. chilled water pump; 9. spare chilled water pump; 10. hot water return pump; 11. spare lithium bromide chiller. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "first", "second" and "third" used in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0042] like Figure 1 As shown, a gas turbine cooling system according to an embodiment of the present invention comprises: a lithium bromide chiller 1, a heating device 3, a cooling device 4, a HVAC user end 6 and a heat exchanger 7 for cooling the gas turbine air inlet;

[0043] The heat source inlet of the lithium bromide chiller 1 is connected to the outlet of the heating device 3, and the heat source outlet of the lithium bromide chiller 1 is connected to the inlet of the heating device 3;

[0044] The cooling water outlet of the lithium bromide chiller 1 is connected to the inlet of the cooling device 4, and the outlet of the cooling device 4 is connected to the cooling water inlet of the lithium bromide chiller 1;

[0045] The chilled water outlet of the lithium bromide chiller 1 is respectively connected to the inlet of the HVAC user end 6 and the inlet of the heat exchanger 7, and the outlet of the HVAC user end 6 and the outlet of the heat exchanger 7 are both connected to the chilled water inlet of the lithium bromide chiller 1.

[0046] It should be noted that when the gas turbine is operated at a relatively low temperature, the inlet and outlet valves of the heating equipment 3, the lithium bromide chiller 1, the cooling equipment 4 and the HVAC user end 6 are opened, and the inlet and outlet valves of the heat exchanger 7 are closed, and the valves are all one-way valves;

[0047] The outlet of the heating device 3 outputs hot water to the heat source inlet of the lithium bromide chiller 1 to provide a driving heat source, and the chilled water outlet of the lithium bromide chiller 1 outputs chilled water to the inlet of the HVAC user end 6 to provide cooling capacity for the HVAC user. The HVAC user end 6 obtains hot water through heat exchange and outputs it to the chilled water inlet of the lithium bromide chiller 1. A part of the hot water is input to the inlet of the heating device 3 from the heat source outlet of the lithium bromide chiller 1, and the other part of the hot water is processed by the lithium bromide chiller 1 and input to the cooling device 4 for cooling to obtain cooling water, and then input to the cooling water inlet of the lithium bromide chiller 1;

[0048] When the gas turbine is running at a relatively high temperature, the inlet and outlet valves of the heating equipment 3, the lithium bromide chiller 1, the cooling equipment 4, the HVAC user end 6 and the heat exchanger 7 are opened, and the valves are all one-way valves;

[0049] The outlet of the heating equipment 3 outputs hot water to the heat source inlet of the lithium bromide chiller 1 to provide a driving heat source. The chilled water outlet of the lithium bromide chiller 1 outputs chilled water that is diverted to the inlet of the HVAC user end 6 and the inlet of the heat exchanger 7 to provide cooling capacity for the HVAC user and the air inlet of the gas turbine. The hot water obtained by heat exchange between the HVAC user end 6 and the heat exchanger 7 is output to the chilled water inlet of the lithium bromide chiller 1. A part of the hot water is input to the inlet of the heating equipment 3 from the heat source outlet of the lithium bromide chiller 1, and the other part of the hot water is processed by the lithium bromide chiller 1 and input to the cooling equipment 4 for cooling to obtain cooling water, and then input to the cooling water inlet of the lithium bromide chiller 1.

[0050] See also Figure 2The lower the gas turbine inlet temperature is, the higher the gas turbine power and efficiency is. Therefore, the chilled water of the lithium bromide chiller 1 is input into the heat exchanger 7 to provide cooling capacity for the gas turbine to achieve inlet cooling, reduce the inlet temperature, and improve the power and efficiency of the gas turbine.

[0051] The lithium bromide chiller 1 is a hot water type lithium bromide absorption chiller;

[0052] The heating equipment 3 is an economizer of a waste heat boiler.

[0053] See also Figure 1 , in a more specific embodiment, further comprising a screw chiller 2;

[0054] The cooling water inlet of the screw chiller 2 is connected to the outlet of the cooling device 4, and the cooling water outlet of the screw chiller 2 is connected to the inlet of the cooling device 4;

[0055] The chilled water outlet of the screw chiller 2 is respectively connected to the inlet of the HVAC refrigeration user end 6 and the inlet of the heat exchanger 7 , and the outlets of the HVAC refrigeration user end 6 and the heat exchanger 7 are both connected to the chilled water inlet of the screw chiller 2 .

[0056] It should be noted that when the lithium bromide chiller 1 fails or the heating device 3 cannot provide a driving heat source, since the screw chiller 2 is driven electrically, no driving heat source is required;

[0057] The screw chiller 2 can replace the lithium bromide chiller 1, and input the chilled water to the HVAC user end 6 and / or the heat exchanger 7 to achieve the corresponding cooling effect. The hot water obtained by heat exchange at the HVAC user end 6 and / or the heat exchanger 7 returns to the screw chiller 2. After being processed by the screw chiller 2, the hot water is input to the cooling device 4 for cooling to obtain cooling water, and then input to the cooling water inlet of the screw chiller 2 to achieve circulation;

[0058] The screw chiller 2 is a water-cooled screw chiller.

[0059] See also Figure 1 , in a more specific embodiment, the cooling device 4 includes a cooling tower 41 and a cooling water pump 42;

[0060] The inlet of the cooling tower 41 is connected to the cooling water outlet of the lithium bromide chiller 1 , the outlet of the cooling tower 41 is connected to the inlet of the cooling water pump 42 , and the outlet of the cooling water pump 42 is connected to the cooling water inlet of the lithium bromide chiller 1 .

[0061] It should be noted that in the prior art, cooling equipment includes cooling towers 41, coolers and cooling pools. The cooling tower 41 has strong power and high energy utilization, and can use less energy to achieve greater cooling effect. The materials used in the cooling tower 41 are strictly determined in accordance with production standards, so the performance of the equipment is more stable and reliable;

[0062] The cooling water pump 42 can promote water circulation, provide power for water transportation, is simple to operate, and is easy to maintain and service. It is preferably a centrifugal cooling water pump.

[0063] See also Figure 1 , in a more specific embodiment, further comprising at least one set of spare cooling equipment 5;

[0064] The standby cooling device 5 and the cooling device 4 are arranged in parallel.

[0065] It should be noted that at least one set of spare cooling equipment 5 is also included. The spare cooling equipment 5 and the cooling equipment 4 are arranged in parallel, so that when the cooling equipment 4 fails, the spare cooling equipment 5 can be replaced for use.

[0066] See also Figure 1 In a more specific embodiment, the standby cooling device 5 includes a standby cooling tower 51 and a standby cooling water pump 52;

[0067] The standby cooling tower 51 and the cooling tower 41 are arranged in parallel;

[0068] The standby cooling water pump 52 is provided in parallel with the cooling water pump 42 .

[0069] It should be noted that the standby cooling tower 51 and the cooling tower 41 are arranged in parallel, so that when the cooling tower 41 fails, the standby cooling tower 51 can be replaced for use;

[0070] The standby cooling water pump 52 is arranged in parallel with the cooling water pump 42 , so that when the cooling water pump 42 fails, the standby cooling water pump 52 can be replaced for use.

[0071] See also Figure 1 In a more specific embodiment, a chilled water pump 8 is connected between the outlet of the HVAC / Refrigeration user end 6 and the outlet of the heat exchanger 7 and the chilled water inlet of the lithium bromide chiller 1 after the outlet is merged.

[0072] It should be noted that the setting of the chilled water pump 8 can promote the circulation of chilled water in the chilled water circuit;

[0073] The chilled water pump 8 is preferably a centrifugal chilled water pump.

[0074] See also Figure 1 , in a more specific embodiment, it also includes at least one set of standby chilled water pumps 9;

[0075] The standby chilled water pump 9 and the chilled water pump 8 are arranged in parallel.

[0076] It should be noted that at least one set of spare chilled water pumps 9 is also included, and the spare chilled water pumps 9 and the chilled water pumps 8 are arranged in parallel, so that when the chilled water pumps 8 fail, the spare chilled water pumps 9 can be replaced for use.

[0077] See also Figure 1 In a more specific embodiment, a hot water return pump 10 is connected between the heat source outlet of the lithium bromide chiller 1 and the inlet of the heating equipment 3 .

[0078] It should be noted that the hot water return pump 10 adjusts the heating equipment 3 by increasing the return water pressure to achieve the balance of the internal pressure of the heating equipment 3. The hot water return pump 10 returns the hot water in the lithium bromide chiller 1 to the heating equipment 3 for heating, thereby achieving the purpose of energy saving and emission reduction.

[0079] See also Figure 3 , in a more specific embodiment, it also includes at least one set of standby lithium bromide chillers 11;

[0080] The standby lithium bromide chiller 11 and the lithium bromide chiller 1 are arranged in parallel.

[0081] It should be noted that it also includes at least one group of standby lithium bromide chillers 11, which are arranged in parallel with the lithium bromide chiller 1, so that when the lithium bromide chiller 1 fails, the standby lithium bromide chiller 11 can be replaced for use, or when one group of lithium bromide chillers 1 cannot meet the refrigeration needs, a standby lithium bromide chiller 11 can be added for use.

[0082] An air intake method for a gas turbine cooling system according to an embodiment of the present invention comprises the following steps:

[0083] When the gas turbine is running at a relatively low temperature, the inlet and outlet valves of the heating equipment 3, the lithium bromide chiller 1, the cooling equipment 4 and the HVAC user end 6 are opened, and the inlet and outlet valves of the heat exchanger 7 are closed;

[0084] The outlet of the heating device 3 outputs hot water to the heat source inlet of the lithium bromide chiller 1 to provide a driving heat source, and the chilled water outlet of the lithium bromide chiller 1 outputs chilled water to the inlet of the HVAC user end 6 to provide cooling capacity for the HVAC user. The HVAC user end 6 obtains hot water through heat exchange and outputs it to the chilled water inlet of the lithium bromide chiller 1. A part of the hot water is input to the inlet of the heating device 3 from the heat source outlet of the lithium bromide chiller 1, and the other part of the hot water is processed by the lithium bromide chiller 1 and input to the cooling device 4 for cooling to obtain cooling water, and then input to the cooling water inlet of the lithium bromide chiller 1;

[0085] When the gas turbine is operated at a relatively high temperature, the inlet and outlet valves of the heating equipment 3, the lithium bromide chiller 1, the cooling equipment 4, the HVAC user end 6 and the heat exchanger 7 are opened;

[0086] The outlet of the heating equipment 3 outputs hot water to the heat source inlet of the lithium bromide chiller 1 to provide a driving heat source. The chilled water outlet of the lithium bromide chiller 1 outputs chilled water that is diverted to the inlet of the HVAC user end 6 and the inlet of the heat exchanger 7 to provide cooling capacity for the HVAC user and the air inlet of the gas turbine. The hot water obtained by heat exchange between the HVAC user end 6 and the heat exchanger 7 is output to the chilled water inlet of the lithium bromide chiller 1. A part of the hot water is input to the inlet of the heating equipment 3 from the heat source outlet of the lithium bromide chiller 1, and the other part of the hot water is processed by the lithium bromide chiller 1 and input to the cooling equipment 4 for cooling to obtain cooling water, and then input to the cooling water inlet of the lithium bromide chiller 1.

[0087] In the prior art, there are 2 cooling towers for use and 1 standby, and this solution adds 2 cooling towers to form 4 for use and 1 standby; in the prior art, there are 3 cooling water pumps for use and 1 standby, and this solution adds 3 cooling water pumps to form 6 for use and 1 standby; in the prior art, there are 2 refrigeration water pumps for use and 1 standby, and this solution adds 2 refrigeration water pumps to form 4 for use and 1 standby. This application solution can greatly save costs.

[0088] In summary, the embodiments of the present invention provide a gas turbine cooling system and a cooling method thereof. The gas turbine intake air cooling and HVAC refrigeration share a set of lithium bromide chillers and cooling equipment. Compared with the prior art, an additional set of lithium bromide chillers and cooling equipment is added. The investment cost required for the gas turbine cooling system of the present application to achieve intake air cooling is low, and the floor space occupied is reduced.

[0089] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A gas turbine cooling system, characterized in that: include: A lithium bromide chiller (1), a heating device (3), a cooling device (4), a HVAC user end (6), and a heat exchanger (7) for cooling the air inlet of a gas turbine; The heat source inlet of the lithium bromide chiller (1) is connected to the outlet of the heating device (3), and the heat source outlet of the lithium bromide chiller (1) is connected to the inlet of the heating device (3); The cooling water outlet of the lithium bromide chiller (1) is connected to the inlet of the cooling device (4), and the outlet of the cooling device (4) is connected to the cooling water inlet of the lithium bromide chiller (1); The chilled water outlet of the lithium bromide chiller (1) is respectively connected to the inlet of the HVAC user end (6) and the inlet of the heat exchanger (7), and the outlet of the HVAC user end (6) and the outlet of the heat exchanger (7) are both connected to the chilled water inlet of the lithium bromide chiller (1).

2. The gas turbine cooling system according to claim 1, characterized in that: Also includes a screw chiller (2); The cooling water inlet of the screw chiller (2) is connected to the outlet of the cooling device (4), and the cooling water outlet of the screw chiller (2) is connected to the inlet of the cooling device (4); The chilled water outlet of the screw chiller (2) is respectively connected to the inlet of the HVAC user end (6) and the inlet of the heat exchanger (7), and the outlet of the HVAC user end (6) and the outlet of the heat exchanger (7) are both connected to the chilled water inlet of the screw chiller (2).

3. The gas turbine cooling system according to claim 1, characterized in that: The cooling equipment (4) comprises a cooling tower (41) and a cooling water pump (42); The inlet of the cooling tower (41) is connected to the cooling water outlet of the lithium bromide chiller (1), the outlet of the cooling tower (41) is connected to the inlet of the cooling water pump (42), and the outlet of the cooling water pump (42) is connected to the cooling water inlet of the lithium bromide chiller (1).

4. The gas turbine cooling system according to any one of claims 1 to 3, characterized in that: Also includes at least one set of spare cooling equipment (5); The standby cooling device (5) and the cooling device (4) are arranged in parallel.

5. The gas turbine cooling system according to claim 4, characterized in that: The standby cooling equipment (5) comprises a standby cooling tower (51) and a standby cooling water pump (52); The standby cooling tower (51) and the cooling tower (41) are arranged in parallel; The standby cooling water pump (52) and the cooling water pump (42) are arranged in parallel.

6. The gas turbine cooling system according to claim 1, characterized in that: A chilled water pump (8) is connected between the outlet of the HVAC user end (6) and the outlet of the heat exchanger (7) and the chilled water inlet of the lithium bromide chiller (1) after the outlet is merged.

7. The gas turbine cooling system according to claim 6, characterized in that: Also includes at least one set of spare chilled water pumps (9); The standby refrigeration water pump (9) and the refrigeration water pump (8) are arranged in parallel.

8. The gas turbine cooling system according to claim 1, characterized in that: A hot water return pump (10) is connected between the heat source outlet of the lithium bromide chiller (1) and the inlet of the heating equipment (3).

9. The gas turbine cooling system according to claim 1, characterized in that: Also includes at least one set of standby lithium bromide chiller (11); The standby lithium bromide chiller (11) and the lithium bromide chiller (1) are arranged in parallel.

10. A cooling method for a gas turbine cooling system according to any one of claims 1 to 9, characterized in that: The following steps are involved: When the gas turbine is operated at a relatively low temperature, the inlet and outlet valves of the heating equipment (3), the lithium bromide chiller (1), the cooling equipment (4) and the HVAC user end (6) are opened, and the inlet and outlet valves of the heat exchanger (7) are closed; The outlet of the heating device (3) outputs hot water to the heat source inlet of the lithium bromide chiller (1) to provide a driving heat source. The chilled water outlet of the lithium bromide chiller (1) outputs chilled water to the inlet of the HVAC user end (6) to provide cooling capacity for the HVAC user. The HVAC user end (6) obtains hot water through heat exchange and outputs it to the chilled water inlet of the lithium bromide chiller (1). A portion of the hot water is input from the heat source outlet of the lithium bromide chiller (1) to the inlet of the heating device (3). The other portion of the hot water is processed by the lithium bromide chiller (1) and then input to the cooling device (4) for cooling to obtain cooling water, which is then input to the cooling water inlet of the lithium bromide chiller (1). When the gas turbine is operated at a relatively high temperature, the inlet and outlet valves of the heating equipment (3), the lithium bromide chiller (1), the cooling equipment (4), the HVAC user end (6) and the heat exchanger (7) are opened; The outlet of the heating device (3) outputs hot water to the heat source inlet of the lithium bromide chiller (1) to provide a driving heat source. The chilled water outlet of the lithium bromide chiller (1) outputs chilled water which is divided into the inlet of the HVAC user end (6) and the inlet of the heat exchanger (7) to provide cooling capacity for the HVAC user and the gas turbine air inlet. The hot water obtained by heat exchange between the HVAC user end (6) and the heat exchanger (7) is output to the chilled water inlet of the lithium bromide chiller (1). A part of the hot water is input to the inlet of the heating device (3) from the heat source outlet of the lithium bromide chiller (1). The other part of the hot water is processed by the lithium bromide chiller (1) and then input to the cooling device (4) for cooling to obtain cooling water, which is then input to the cooling water inlet of the lithium bromide chiller (1).

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