CN209781041U - tower type solar combined cycle power generation equipment for heating air at inlet of compressor - Google Patents

tower type solar combined cycle power generation equipment for heating air at inlet of compressor Download PDF

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Publication number
CN209781041U
CN209781041U CN201822275795.3U CN201822275795U CN209781041U CN 209781041 U CN209781041 U CN 209781041U CN 201822275795 U CN201822275795 U CN 201822275795U CN 209781041 U CN209781041 U CN 209781041U
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inlet
heat
outlet
communicated
heat exchanger
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Inventor
刘志坦
张涛
张天清
郝洪亮
付忠广
张高强
王凯
朱鸿飞
严志远
高玉才
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North China Electric Power University
Guodian Environmental Protection Research Institute Co Ltd
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North China Electric Power University
Guodian Environmental Protection Research Institute Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62—Absorption based systems
    • Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Abstract

the utility model discloses a combined cycle power generation device for tower solar heating compressor inlet air, wherein a tower solar heat collection subassembly comprises a tower solar heat collector, a high temperature heat storage tank, a first heat exchanger, a low temperature heat storage tank and a driving pump; the heliostat in the tower type solar heat collector reflects sunlight and leads the sunlight to be concentrated on a receiver assembled on the heat collecting tower; an inlet of the high-temperature heat storage tank is communicated with an outlet of the receiver; an inlet of the first heat exchanger is communicated with an outlet of the high-temperature heat storage tank; an inlet of the low-temperature storage tank is communicated with an outlet of the first heat exchanger; an inlet of the driving pump is communicated with an outlet of the low-temperature heat storage tank, and an outlet of the driving pump is communicated with an inlet of the receiver; the driving pump drives the heat storage working medium to circularly flow in a circulating loop formed by sequentially communicating the receiver, the high-temperature heat storage tank, the first heat exchanger, the low-temperature storage tank and the driving pump; the first heat exchanger heats the working medium of the gas turbine inlet air heating subassembly by utilizing the heat of the heat storage working medium. The above apparatus can heat the compressor inlet air using solar energy.

Description

Tower type solar combined cycle power generation equipment for heating air at inlet of compressor
Technical Field
The utility model relates to a gas turbine technical field, more specifically say, relate to a combined cycle power generation facility of tower solar heating compressor import air.
Background
The development of the gas turbine, which is a representative of national advanced manufacturing industry, has a great influence on the technical development and research of national energy equipment, even national economy, and has an irreplaceable effect in the field of energy.
the gas turbine inlet air heating is to heat the inlet air of the compressor by adopting a heat source, so that the problems of ice blockage, wet blockage and the like of an air inlet assembly of the gas turbine under severe weather conditions are prevented, and the influence of environmental parameter change on the operation of a gas turbine unit is reduced. The existing gas turbine mainly adopts an air extraction heating pipeline to introduce the exhaust of a compressor into an air inlet heating main pipe arranged in front of an inlet silencer to heat the inlet air of the compressor, but the mode only utilizes the exhaust waste heat of the compressor and does not introduce other renewable resources.
In summary, the introduction of other renewable resources to heat the compressor inlet air is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
in view of this, the utility model provides a combined cycle power generation facility of tower solar energy heating compressor import air, it can utilize solar energy heating compressor import air, does benefit to the generating efficiency who improves gas turbine.
In order to achieve the above object, the utility model provides a following technical scheme:
A tower solar powered compressor inlet air combined cycle power plant comprising a tower solar collector subassembly and a gas turbine inlet air heating subassembly, said tower solar collector subassembly comprising:
The solar energy collecting tower comprises a heliostat, a receiver and a heat collecting tower; the receiver is mounted at the top end of the heat collection tower; the heliostat is used for reflecting sunlight and concentrating the reflected sunlight on the receiver; the receiver is used for absorbing solar energy;
The inlet of the high-temperature heat storage tank is communicated with the outlet of the receiver;
an inlet of the first heat exchanger is communicated with an outlet of the high-temperature heat storage tank;
The inlet of the low-temperature storage tank is communicated with the outlet of the first heat exchanger;
An inlet of the driving pump is communicated with an outlet of the low-temperature heat storage tank, and an outlet of the driving pump is communicated with an inlet of the receiver; the driving pump is used for driving a heat storage working medium to circularly flow in a circulating loop formed by sequentially communicating the receiver, the high-temperature heat storage tank, the first heat exchanger, the low-temperature storage tank and the driving pump;
the first heat exchanger utilizes the heat of the heat storage working medium to heat the working medium of the air inlet heating subassembly.
preferably, in the combined cycle power plant, the gas turbine inlet air heating subassembly comprises:
the inlet of the quality control valve is communicated with the outlet of the first heat exchanger, and the outlet of the quality control valve is communicated with the inlet of the second heat exchanger;
An inlet of the throttle valve is communicated with an outlet of the second heat exchanger, and an outlet of the throttle valve is communicated with the first working medium pump; and the outlet of the first working medium pump is communicated with the inlet of the first heat exchanger.
Preferably, the combined cycle power plant further comprises a lithium bromide refrigeration subassembly, wherein the lithium bromide refrigeration subassembly comprises: the third heat exchanger and the refrigerating device are communicated to form a refrigerating circulation pipeline;
an inlet of the throttling valve is communicated with an outlet of the second heat exchanger through the third heat exchanger; the gas turbine inlet air heating subassembly further comprises a bypass valve; and the inlet of the bypass valve is communicated with the outlet of the quality control valve, and the outlet of the bypass valve is communicated with the inlet of the third heat exchanger.
Preferably, the combined cycle power plant further includes an organic rankine cycle power generation subassembly, and the organic rankine cycle power generation subassembly includes: the system comprises a fourth heat exchanger, a turbine, a first condenser and a second working medium pump, wherein a heated pipeline of the fourth heat exchanger is sequentially communicated with the turbine, the first condenser and the second working medium pump to form a Rankine cycle power generation loop;
And the inlet of the fourth heat exchanger is communicated with the outlet of the first heat exchanger, and the outlet of the fourth heat exchanger is communicated with the inlet of the first working medium pump.
Preferably, in the combined cycle power plant, the cycle fluid in the rankine cycle power generation circuit is R245 fa.
Preferably, the combined cycle power generation equipment further comprises a wind generating set, the wind generating set is connected with a transmission, and the transmission is connected with the first working medium pump.
Preferably, in the combined cycle power plant, the gas-steam combined cycle power generation subassembly of the combined cycle power plant comprises a compressor; an inlet of the compressor is communicated with the second heat exchanger, an outlet of the compressor is connected with an inlet of a combustion chamber, and an outlet of the combustion chamber is communicated with a gas turbine; the outlet of the gas turbine is connected with the inlet of the waste heat boiler;
The total feed water of the waste heat boiler is divided into a high pressure path and a low pressure path after being absorbed by a low pressure economizer, and the low pressure path feed water enters a low pressure cylinder through a low pressure evaporator and a low pressure superheater to push a steam turbine to do work; the high-pressure one-path feed water is boosted by a high-pressure feed pump, then enters a high-pressure cylinder to do work after absorbing heat by a high-pressure economizer, a high-pressure evaporator and a high-pressure superheater, high-pressure exhaust gas which does work is mixed with low-pressure superheated steam discharged by the low-pressure superheater and then enters a low-pressure cylinder to continue to do work, the exhaust gas then enters a condenser to be cooled, and the next cycle is continued after boosting by the feed pump.
Preferably, in the combined cycle power generation plant, the heat storage working medium is molten salt, and the molten salt includes NaNO3and KNO3(ii) a The molar mass of the molten salt is 91.438g/mol, the lowest working temperature of the molten salt is 200 ℃, and the highest working temperature of the molten salt is 600 ℃.
preferably, in the combined cycle power plant, the height of the heat collecting tower is 128 m.
Preferably, in the combined cycle power plant, the working medium of the gas turbine inlet heating subassembly is water.
the utility model provides a combined cycle power generation device for tower solar heating compressor inlet air, which comprises a tower solar heat collecting subassembly and a gas turbine inlet air heating subassembly; the tower type solar heat collection subassembly comprises a tower type solar heat collector, a high-temperature heat storage tank, a first heat exchanger, a low-temperature heat storage tank and a driving pump; the tower type solar heat collector comprises a heliostat, a receiver and a heat collecting tower; the receiver is arranged at the top end of the heat collecting tower; the heliostat is used for reflecting sunlight and concentrating the reflected sunlight to the receiver; the receiver is used for absorbing solar heat; the inlet of the high-temperature heat storage tank is communicated with the outlet of the receiver; an inlet of the first heat exchanger is communicated with an outlet of the high-temperature heat storage tank; an inlet of the low-temperature storage tank is communicated with an outlet of the first heat exchanger; an inlet of the driving pump is communicated with an outlet of the low-temperature heat storage tank, and an outlet of the driving pump is communicated with an inlet of the receiver; the driving pump is used for driving the heat storage working medium to circularly flow in a circulating loop formed by sequentially communicating the receiver, the high-temperature heat storage tank, the first heat exchanger, the low-temperature storage tank and the driving pump; the first heat exchanger heats working media of the gas turbine inlet heating subassembly by utilizing heat of the heat storage working media, and the working media can heat inlet air of the compressor in a circulating flow process in the gas turbine inlet heating subassembly.
The combined cycle power generation equipment can heat the air at the inlet of the compressor by using solar energy, and is favorable for improving the power generation efficiency of the gas turbine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a combined cycle power generation plant for tower solar heating of compressor inlet air according to an embodiment of the present invention;
Wherein, in fig. 1:
Tower solar collector a 1; high temperature heat storage tank a 2; a first heat exchanger a 3; a low-temperature heat storage tank A4; drive pump a 5; a quality control valve a 6; a second heat exchanger a 7; first working medium pump A8; throttle valves a9, a 10; a wind generating set A11; transmission a 12; bypass valve a 13;
A compressor B1; combustion chamber B2; gas turbine B3; high-pressure superheater B4; a high-pressure evaporator B5; a high-pressure economizer B6; a low-pressure superheater B7; a low-pressure evaporator B8; a low-pressure economizer B9; high-pressure cylinder B10; low pressure cylinder B11; a second condenser B13; a feed pump B14; a quality control valve B15; a high-pressure feed pump B16;
A fourth heat exchanger C1; turbine C2; a first condenser C3; second working medium pump C4;
A third heat exchanger D1; refrigeration device D2.
Detailed Description
The embodiment of the utility model discloses combined cycle power generation equipment of tower solar heating compressor import air, it can utilize solar heating compressor import air, does benefit to the generating efficiency who improves gas turbine.
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
referring to fig. 1, an embodiment of the present invention provides a combined cycle power generation apparatus for tower solar heating of compressor inlet air, which includes a tower solar heat collecting subassembly and a gas turbine inlet air heating subassembly; the tower type solar heat collection subassembly comprises a tower type solar heat collector A1, a high-temperature heat storage tank A2, a first heat exchanger A3, a low-temperature heat storage tank A4 and a driving pump A5; the tower type solar thermal collector A1 comprises a heliostat, a receiver and a heat collecting tower; the receiver is arranged at the top end of the heat collecting tower; the heliostat is used for reflecting sunlight and concentrating the reflected sunlight to the receiver; the receiver is used for absorbing solar heat; the inlet of the high-temperature heat storage tank A2 is communicated with the outlet of the receiver; the inlet of the first heat exchanger A3 is communicated with the outlet of the high-temperature heat storage tank A2; the inlet of the low-temperature storage tank is communicated with the outlet of the first heat exchanger A3; the inlet of the driving pump A5 is communicated with the outlet of the low-temperature heat storage tank A4, and the outlet of the driving pump A5 is communicated with the inlet of the receiver; the driving pump A5 is used for driving heat storage working medium to circularly flow in a circulating loop formed by sequentially communicating the receiver, the high-temperature heat storage tank A2, the first heat exchanger A3, the low-temperature storage tank and the driving pump A5; the first heat exchanger A3 heats the working medium of the gas turbine inlet heating subassembly by using the heat of the heat storage working medium, and the working medium can heat the compressor inlet air in the circulating flow process in the gas turbine inlet heating subassembly.
when the combined cycle power generation equipment is applied, sunlight is reflected by the heliostat and then is concentrated on the receiver, the receiver absorbs heat from the sun and transfers the heat to the heat storage working medium, the heat storage working medium carries the heat to reach the first heat exchanger A3 after passing through the high-temperature heat storage tank, the heat is transferred to the working medium in the gas turbine air inlet heating subassembly at the first heat exchanger A3, and then the heat returns to the receiver through the low-temperature heat storage tank A4 and the driving pump A5.
obviously, the combined cycle power generation equipment can heat the air at the inlet of the compressor by using solar energy, and is favorable for improving the power generation efficiency of the gas turbine.
In addition, the tower type solar heat collection subassembly is provided with the high and low heat storage tanks, the heat storage working medium stores the heat in the heat storage tank after absorbing the heat, and the heat storage working medium can absorb the heat stored in the heat storage tank to continue heat circulation at night. The tower type solar heat collection subassembly can continuously supply heat to the first heat exchanger A3 by utilizing the high-temperature heat storage tank needle and the low-temperature heat storage tank needle in the daytime and at night in various days, and the stable operation of the whole system is ensured.
The heat storage working medium is arranged as molten salt, and the molten salt comprises NaNO3And KNO3(ii) a The molar mass of the molten salt is 91.438g/mol, the lowest working temperature of the molten salt is 200 ℃, and the highest working temperature is 600 ℃; compared with other heat storage working media, the heat quantity of the molten salt is large and the time is long. The height of the heat collecting tower is set to 128m, and of course, the height of the heat collecting tower can be set to other values according to the site environment, and the embodiment is not limited.
the gas turbine inlet air heating subassembly includes:
A mass control valve A6, wherein the inlet of the mass control valve A6 is communicated with the outlet of the first heat exchanger A3 (the outlet refers to the outlet of the heated pipeline in the first heat exchanger A3), and the outlet of the mass control valve A6 is communicated with the inlet of the second heat exchanger A7 (the inlet refers to the inlet of the heat source pipeline in the second heat exchanger A7);
An inlet of the throttle valve A9 is communicated with an outlet of a second heat exchanger A7 (the outlet is an outlet of a heat source pipeline in the second heat exchanger A7), and an outlet of the throttle valve A9 is communicated with a first working medium pump A8; the outlet of first working fluid pump A8 communicates with the inlet of first heat exchanger A3 (the inlet being the inlet of the heated circuit in first heat exchanger A3).
the working medium which circularly flows in the gas inlet heating subassembly of the gas turbine is water; the second heat exchanger A7 is a water-air heat exchanger, and air is introduced into the inlet of the heated pipeline in the second heat exchanger A7.
The combined cycle power generation equipment provided by the embodiment further comprises a lithium bromide refrigeration subassembly, wherein the lithium bromide refrigeration subassembly comprises a third heat exchanger D1 and a refrigeration device D2; the inlet of the third heat exchanger D1 is communicated with the outlet of the refrigerating device D2, the outlet of the third heat exchanger D1 is communicated with the inlet of the refrigerating device D2, and the inlet of the third heat exchanger D1 and the inlet of the refrigerating device D2 are communicated to form a refrigerating cycle pipeline; the inlet of the throttle valve a9 communicates with the outlet of the second heat exchanger a7 via a third heat exchanger D1 (in particular via a heat source line within the third heat exchanger D1); the gas turbine inlet air heating subassembly also includes a bypass valve A13; the inlet of the bypass valve a13 communicates with the outlet of the mass control valve a6 and the outlet of the bypass valve a13 communicates with the inlet of the third heat exchanger D1 (the inlet is the inlet of the heat source line in the third heat exchanger D1).
When the air humidity is low and the temperature is high in summer and autumn, the lithium bromide refrigeration subassembly absorbs the heat of working media in the gas turbine air inlet heating subassembly, and then the cold energy is obtained through the lithium bromide refrigeration unit, so that the full utilization of the energy is realized. In addition, during the application process of the gas turbine inlet air heating subassembly, the mass flow of the feed water passing through the second heat exchanger A7 can be changed by adjusting the opening degrees of the mass control valve A6 and the bypass valve A13, so that the temperature of the inlet air entering the compressor B1 is controlled.
specifically, the combined cycle power plant further comprises an organic rankine cycle power generation subassembly, and the organic rankine cycle power generation subassembly comprises: a fourth heat exchanger C1, a turbine C2, a first condenser C3 and a second working medium pump C4; a heated pipeline of the fourth heat exchanger is sequentially communicated with a turbine C2, a first condenser C3 and a second working medium pump C4 to form a Rankine cycle power generation loop; the inlet of fourth heat exchanger C1 (which is the inlet of the heat source conduit in fourth heat exchanger C1) communicates with the outlet of first heat exchanger A3 (which is the outlet of the heated conduit in first heat exchanger A3), and the outlet of fourth heat exchanger C1 (which is the outlet of the heat source conduit in fourth heat exchanger C1) communicates with the inlet of first working fluid pump A8 through throttle valve a 10.
working medium in the Rankine cycle power generation loop absorbs heat through the fourth heat exchanger C1 and then enters the steam turbine to do work, the working medium which does work enters the first condenser C3 to emit heat, then the working medium reaches working pressure through the working medium pump C4, and the working medium after pressure boosting enters the fourth heat exchanger C1 again to be circulated for the next time. The organic Rankine cycle is used as a clean pollution-free power generation mode, the low-grade waste heat is used for generating power to compensate the auxiliary power consumption, and a power generation mode with the advantages of being green and profitable is established.
Working media in the gas turbine inlet heating subassembly are divided into two paths after absorbing heat at the first heat exchanger A3, and one path is subjected to power generation through the organic Rankine cycle power generation subassembly; the other path of the working medium passes through a quality control valve A6 and enters a second heat exchanger A7, the working medium after heat emission provides a heat source for the lithium bromide refrigerating unit, and if the gas turbine inlet air heating subassembly does not need to be put into operation, the working medium directly provides a heat source for the lithium bromide refrigerating unit through a bypass valve A13; the working medium after heat release of the lithium bromide unit passes through a throttle valve A9 and then is mixed with the previous working medium, and the mixed water is subjected to pressure increase through a first working medium pump A8 and then is subjected to the next cycle of circulation process.
the third heat exchanger D1 is a water-water heat exchanger; the cycle working medium in the Rankine cycle power generation loop is R245fa (pentafluoropropane), and the fourth heat exchanger C1 is a water-pentafluoropropane heat exchanger.
The combined cycle power generation equipment further comprises a wind generating set A11, the wind generating set A11 is connected with a speed changer A12, and the speed changer A12 is connected with a first working medium pump A8. When no wind exists or wind power is small, service power is used for supplying power to the first working medium pump A8, and when the wind power is large, the wind generating set A11 is used for providing power for the first working medium pump A8, so that the service power is saved, and the generating efficiency is improved.
Specifically, the fuel gas-steam combined cycle power generation subassembly of the combined cycle power generation equipment takes natural gas as fuel, air as top cycle working medium and water as bottom cycle working medium; the gas-steam combined cycle power generation subassembly includes a compressor B1; the air enters a compressor B1 after being heated by a second heat exchanger A7, the inlet of the compressor B1 is communicated with the outlet of the second heat exchanger A7 (the outlet is the outlet of a heated pipeline in the second heat exchanger A7), the outlet of the compressor B1 is connected with the inlet of a combustion chamber B2, and the outlet of the combustion chamber B2 is communicated with the inlet of a gas turbine B3; the outlet of the gas turbine B3 is connected to the inlet of a double-pressure reheat-free waste heat boiler; the total feed water of the waste heat boiler is divided into a high pressure path and a low pressure path after absorbing heat through a low pressure economizer B9, and the low pressure path feed water enters a low pressure cylinder B11 through a low pressure evaporator B8 and a low pressure superheater B7 to push a steam turbine to do work; one path of high-pressure feed water passes through a quality control valve B15 and then is boosted at a high-pressure feed water pump B16, then enters a high-pressure cylinder B10 to do work after absorbing heat through a high-pressure economizer B6, a high-pressure evaporator B5 and a high-pressure superheater B4, high-pressure exhaust gas which does work is mixed with low-pressure superheated steam discharged by a low-pressure superheater B7 and then enters a low-pressure cylinder B11 to continue to do work, and the exhaust gas then enters a second condenser B13 to be cooled and then is boosted by a feed water pump B14 and continues to the next cycle.
In application, air enters the combustion chamber B2 through the second heat exchanger A7 and the compressor B1 and is combusted with natural gas. The high-temperature and high-pressure flue gas after combustion enters a gas turbine B3 to do work, and exhaust gas after doing work is discharged after heat is released by a waste heat boiler. The total feed water of the waste heat boiler is divided into two paths of high pressure and low pressure after absorbing heat through the low-pressure economizer B9, and the two paths of feed water do work and are boosted by the feed pump B14 to continue the next cycle.
In the tower-type solar combined cycle power generation equipment for heating air at the inlet of the compressor, after the gas turbine air inlet heating subassembly is put into operation, the inlet temperature of the compressor B1 is increased, and by adjusting the load factor of the gas turbine, the total output power of the gas-steam combined cycle power generation subassembly can be kept unchanged under partial load, the fuel consumption is reduced, and the combined cycle efficiency is increased.
Compared with the conventional combined cycle power plant, the combined cycle power plant provided by the embodiment has significant thermodynamic integration advantages and economic advantages, and specifically, refer to the following table:
TABLE 1 gas-steam combined cycle thermodynamic analysis base data
Table 2 shows the basic data of the tower type solar heat collecting subassembly
TABLE 3 parameters for each node when the gas turbine inlet heater subassembly is not engaged
aiming at the conditions that the environmental temperature is 12.5 ℃ and the pressure is 1.016bar, the intake heating subassembly is put into operation when the simulated combined cycle unit is respectively at 50%, 75%, 87.24%, 95% and 100% of load, so that the inlet temperature of the compressor reaches 35 ℃, the power of the gas turbine is changed by adjusting the load rate of the gas turbine, then the turbine is adjusted along with the gas turbine to keep the combined cycle power unchanged, and the influence of the intake heating system on the combined cycle performance is further researched.
Table 4 shows thermodynamic performance data before and after commissioning of an inlet heater subassembly for a gas turbine
as can be seen from the data in table 4:
The novel tower-type solar combined cycle power generation equipment for heating the air at the inlet of the compressor can effectively reduce the consumption of natural gas and improve the combined cycle efficiency by putting the air inlet heating system into operation when the load is lower than 87.24%, thereby achieving the effects of energy conservation and emission reduction.
When the temperature is increased from 12.5 ℃ to 35 ℃ by putting the gas inlet heating system into the system, the combined cycle output power can be kept unchanged by adjusting the load rate of the gas turbine in a load interval of less than 87.24%, and the load rates of the gas turbine can be respectively increased by 0.08, 0.12 and 0.15 under the loads of 50%, 75% and 87.24%.
when the gas-steam combined cycle unit is at 95% load, the gas turbine load factor is improved from 0.95 to 1.00 when the inlet temperature of the compressor is within the range of 12.5-20 ℃, and the combined cycle output power can be kept unchanged; the combined cycle output power will be reduced with the turbine load factor at a maximum of 1.00 over the 20-35 c range. At 100% load, the gas turbine load factor is at a maximum of 1.00; at elevated compressor inlet temperature, the combined cycle output power will decrease.
when the inlet temperature of the compressor is increased from 12.5 ℃ to 35 ℃, the combined cycle unit can keep the output power of the combined cycle unchanged by adjusting the load rate of the gas turbine under the load of 50%, 75% and 87.24%, the consumption of natural gas can be respectively reduced by 0.11kg/s, 0.13kg/s, 0.10kg/s and 95%, and the combined cycle efficiency can be respectively increased by 1.04%, 1.03% and 0.73%.
The combined cycle power generation equipment for tower type solar heating compressor inlet air can reduce fuel consumption under partial load and improve combined cycle efficiency. Meanwhile, an organic Rankine cycle system can be used for generating power, the service power consumption is compensated, and the cold energy can be obtained through a lithium bromide refrigerating unit in summer.
the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A combined cycle power plant of tower solar heating compressor inlet air, characterized in that, includes tower solar heat collection subassembly and gas turbine heating subassembly that admits air, tower solar heat collection subassembly includes:
The solar energy collecting tower comprises a heliostat, a receiver and a heat collecting tower; the receiver is mounted at the top end of the heat collection tower; the heliostat is used for reflecting sunlight and concentrating the reflected sunlight on the receiver; the receiver is used for absorbing solar energy;
The inlet of the high-temperature heat storage tank is communicated with the outlet of the receiver;
An inlet of the first heat exchanger is communicated with an outlet of the high-temperature heat storage tank;
the inlet of the low-temperature heat storage tank is communicated with the outlet of the first heat exchanger;
An inlet of the driving pump is communicated with an outlet of the low-temperature heat storage tank, and an outlet of the driving pump is communicated with an inlet of the receiver; the driving pump is used for driving a heat storage working medium to circularly flow in a circulating loop formed by sequentially communicating the receiver, the high-temperature heat storage tank, the first heat exchanger, the low-temperature heat storage tank and the driving pump;
the first heat exchanger utilizes the heat of the heat storage working medium to heat the working medium of the air inlet heating subassembly.
2. The combined cycle power plant of claim 1, wherein the gas turbine intake heating subassembly comprises:
the inlet of the quality control valve is communicated with the outlet of the first heat exchanger, and the outlet of the quality control valve is communicated with the inlet of the second heat exchanger;
An inlet of the throttle valve is communicated with an outlet of the second heat exchanger, and an outlet of the throttle valve is communicated with the first working medium pump; and the outlet of the first working medium pump is communicated with the inlet of the first heat exchanger.
3. The combined cycle power plant of claim 2, further comprising a lithium bromide refrigeration subassembly, the lithium bromide refrigeration subassembly comprising: the third heat exchanger and the refrigerating device are communicated to form a refrigerating circulation pipeline;
An inlet of the throttling valve is communicated with an outlet of the second heat exchanger through the third heat exchanger; the gas turbine inlet air heating subassembly further comprises a bypass valve; and the inlet of the bypass valve is communicated with the outlet of the quality control valve, and the outlet of the bypass valve is communicated with the inlet of the third heat exchanger.
4. The combined cycle power plant of claim 2, further comprising an organic rankine cycle power sub-assembly comprising: the system comprises a fourth heat exchanger, a turbine, a first condenser and a second working medium pump, wherein a heated pipeline of the fourth heat exchanger is sequentially communicated with the turbine, the first condenser and the second working medium pump to form a Rankine cycle power generation loop;
And the inlet of the fourth heat exchanger is communicated with the outlet of the first heat exchanger, and the outlet of the fourth heat exchanger is communicated with the inlet of the first working medium pump.
5. The combined cycle power plant of claim 4, wherein the cycle fluid within the Rankine cycle power generation circuit is R245 fa.
6. The combined cycle power plant of claim 2, further comprising a wind turbine generator coupled to a transmission coupled to the first working fluid pump.
7. The combined cycle power plant of claim 2, wherein the gas-steam combined cycle power sub-assembly of the combined cycle power plant comprises a compressor; an inlet of the compressor is communicated with the second heat exchanger, an outlet of the compressor is connected with an inlet of a combustion chamber, and an outlet of the combustion chamber is communicated with a gas turbine; the outlet of the gas turbine is connected with the inlet of the waste heat boiler;
The total feed water of the waste heat boiler is divided into a high pressure path and a low pressure path after being absorbed by a low pressure economizer, and the low pressure path feed water enters a low pressure cylinder through a low pressure evaporator and a low pressure superheater to push a steam turbine to do work; the high-pressure one-path feed water is boosted by a high-pressure feed pump, then enters a high-pressure cylinder to do work after absorbing heat by a high-pressure economizer, a high-pressure evaporator and a high-pressure superheater, high-pressure exhaust gas which does work is mixed with low-pressure superheated steam discharged by the low-pressure superheater and then enters a low-pressure cylinder to continue to do work, the exhaust gas then enters a condenser to be cooled, and the next cycle is continued after boosting by the feed pump.
8. The combined cycle power plant of claim 1, wherein the heat storage working fluid is a molten salt comprising NaNO3And KNO3(ii) a The molar mass of the molten salt is 91.438g/mol, the lowest working temperature of the molten salt is 200 ℃, and the highest working temperature of the molten salt is 600 ℃.
9. The combined cycle power plant of claim 1, wherein the height of the heat collection tower is 128 m.
10. The combined cycle power plant of claim 1, wherein the working fluid of the gas turbine inlet heater subassembly is water.
CN201822275795.3U 2018-12-29 2018-12-29 tower type solar combined cycle power generation equipment for heating air at inlet of compressor Active CN209781041U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109538355A (en) * 2018-12-29 2019-03-29 国电环境保护研究院有限公司 The combined cycle power plant of tower type solar heating compressor inlet air

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109538355A (en) * 2018-12-29 2019-03-29 国电环境保护研究院有限公司 The combined cycle power plant of tower type solar heating compressor inlet air
CN109538355B (en) * 2018-12-29 2024-02-27 国电环境保护研究院有限公司 Combined cycle power generation equipment for heating inlet air of compressor by tower type solar energy

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