CN110595102A - Multipurpose regional cooling system and control method - Google Patents
Multipurpose regional cooling system and control method Download PDFInfo
- Publication number
- CN110595102A CN110595102A CN201910846882.6A CN201910846882A CN110595102A CN 110595102 A CN110595102 A CN 110595102A CN 201910846882 A CN201910846882 A CN 201910846882A CN 110595102 A CN110595102 A CN 110595102A
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- Prior art keywords
- cold
- refrigerating unit
- lithium bromide
- cooling
- water tank
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- 238000001816 cooling Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 204
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 125
- 239000007789 gas Substances 0.000 claims abstract description 44
- 238000009825 accumulation Methods 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000005338 heat storage Methods 0.000 claims abstract description 17
- 239000000498 cooling water Substances 0.000 claims description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 17
- 239000003546 flue gas Substances 0.000 claims description 17
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 239000000779 smoke Substances 0.000 claims description 7
- 239000002918 waste heat Substances 0.000 abstract description 15
- 230000002093 peripheral effect Effects 0.000 abstract description 12
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 12
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 12
- 229910052794 bromium Inorganic materials 0.000 description 12
- 239000003638 chemical reducing agent Substances 0.000 description 7
- 238000004378 air conditioning Methods 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Combustion & Propulsion (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses a multipurpose regional cooling system and a control method, wherein the system comprises: the system comprises a lithium bromide refrigerating unit, an electric refrigerating unit, a heat exchange mechanism, a cooling tower, a heat storage water tank, a cold storage water tank and a gas turbine inlet air cooler; the lithium bromide refrigerating unit is respectively connected with the gas turbine inlet cooler and the cold accumulation water tank and provides a cold source; the cold accumulation water tank is connected with the gas inlet cooler of the gas turbine; the heat exchange mechanism is respectively connected with the lithium bromide refrigerating unit and the heat storage water tank; the cooling tower is respectively connected with the lithium bromide refrigerating unit and the electric refrigerating unit. The regional cold supply system is provided with the cold accumulation water tank to realize the cold accumulation function; the regional cold supply system is provided with a gas turbine inlet cooler to realize the gas turbine inlet cooling function; the regional cold supply system is provided with a heat exchange mechanism and a heat storage water tank to realize the function of hot water supply. The invention has a useful cooling path and a waste heat consumption path, and can meet the requirements of peripheral users, fully utilize waste heat and improve the energy utilization rate of the regional cooling system.
Description
Technical Field
The invention relates to the application field of lithium bromide units, in particular to a multipurpose regional cooling system and a control method.
Background
Regional cooling systems are commonly found in regional distributed energy projects to meet the cooling load demands of surrounding users. The configuration of a general area cooling system includes a hot water type lithium bromide unit/steam type lithium bromide unit, a cooling tower, a water pump and the like, and only provides cold water for air conditioning or industrial cooling for peripheral users. The hot water type lithium bromide unit takes heat source water heated by waste heat of flue gas as drive, thereby realizing waste heat utilization and improving energy utilization rate.
Because there is no cold storage device in the existing regional cooling system, in order to meet the cooling load demand of users, the regional cooling system is usually configured according to the maximum cooling load demand. As weather changes or production tasks are adjusted, the user cooling load may fluctuate at any time. However, because there is no cold storage measure or gas inlet cooling branch in the system, the existing regional cold supply system is difficult to adapt to the fluctuation of the cold load of the user. In some projects, the cooling load of users is small, and even if the regional cooling system is configured according to the maximum cooling load requirement, the waste heat in the flue gas cannot be completely utilized. Therefore, there is a need to find various cooling paths or waste heat consuming paths, and to design a regional cooling system that can not only meet the needs of peripheral users, but also fully utilize waste heat and improve energy utilization.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an area cold supply system integrating cold accumulation, gas turbine inlet air cooling and high-temperature hot water, so that the area cold supply system can meet the cold load requirements of peripheral users and the hot water requirements of the peripheral users, and can also perform cold accumulation and gas turbine inlet air cooling, and finally, the purposes of fully utilizing waste heat and improving the energy utilization rate are achieved.
The purpose of the invention is realized by the following technical scheme:
a multi-purpose area cooling system, comprising: the system comprises a lithium bromide refrigerating unit, an electric refrigerating unit, a heat exchange mechanism, a cooling tower, a heat storage water tank, a cold storage water tank and a gas turbine inlet air cooler; the lithium bromide refrigerating unit is respectively connected with the gas turbine inlet cooler and the cold accumulation water tank and provides a cold source; the cold accumulation water tank is connected with the gas inlet cooler of the gas turbine; the heat exchange mechanism is respectively connected with the lithium bromide refrigerating unit and the heat storage water tank; the cooling tower is respectively connected with the lithium bromide refrigerating unit and the electric refrigerating unit. The regional cold supply system is provided with a cold accumulation water tank to realize the cold accumulation function; the regional cold supply system is provided with a gas turbine inlet cooler to realize the gas turbine inlet cooling function; the regional cold supply system is provided with a heat exchange mechanism and a heat storage water tank to realize the function of hot water supply.
As a preferred mode, the lithium bromide refrigerating unit is connected with the heat engine smoke heat exchanger, and obtains a heat source from the heat engine smoke heat exchanger.
As a preferred mode, the heat engine flue gas heat exchanger is also connected with the heat exchange mechanism.
As a preferred mode, a hot water supply pipe and a hot water return pipe are arranged between the lithium bromide refrigerating unit and the heat engine flue gas heat exchanger; a hot water supply pipe and a hot water return pipe are arranged between the lithium bromide refrigerating unit and the heat exchange mechanism.
Preferably, the lithium bromide refrigerating unit is a hot water type lithium bromide unit or a steam type lithium bromide unit.
Preferably, the cooling tower is an open cooling tower.
Preferably, the electric refrigerating unit adopts a water-cooling screw type electric refrigerating unit.
As a preferred mode, the heat exchange mechanism adopts an integral heat exchange unit.
Preferably, a cooling water supply pipe and a cooling water return pipe are provided between the cooling tower and the lithium bromide refrigeration unit. And a bromine cooler cooling water pump is arranged on a cooling water supply pipe between the cooling tower and the lithium bromide refrigerating unit, the bromine cooler cooling water pump is configured according to 3 multiplied by 50%, and the bromine cooler cooling water pump runs at power frequency.
Preferably, a cooling water supply pipe and a cooling water return pipe are provided between the cooling tower and the electric refrigerator unit.
A control method of a multipurpose zone cooling system comprises the following working conditions:
working condition 1: the lithium bromide refrigerating unit is closed, only the electric refrigerating unit operates, and cold is supplied to the factory;
working condition 2: when the cold load demand of users outside the plant is reduced, if the lithium bromide refrigerating unit is in a high-temperature time period in the daytime, the surplus cold energy of the lithium bromide refrigerating unit does not enter the cold accumulation water tank and is directly used for cooling the inlet air of the combustion engine;
working condition 3: when the cold load demand of the user outside the factory is reduced, if the temperature is low at night, the surplus cold energy of the lithium bromide refrigerating unit enters the cold accumulation water tank for cold accumulation; or the surplus hot water of the flue gas heat exchanger is supplied to the integral heat exchange unit to prepare high-temperature hot water at the temperature of 80 ℃ or above and then stored in a heat storage water tank;
working condition 4: and (3) cooling working condition: in the daytime when the air temperature is high, cold water in the cold accumulation water tank is discharged and enters the gas inlet cooler of the gas turbine to cool the gas inlet of the gas turbine;
the working condition 1 is a debugging period working condition, and the working conditions 2-4 are normal operation period working conditions; in the normal operation period, the lithium bromide refrigerating unit is put into operation to supply cold to users outside the plant and/or buildings inside the plant, and the electric refrigerating unit is closed.
The invention has the beneficial effects that: the regional cold supply system is provided with a cold accumulation water tank to realize the cold accumulation function; the regional cold supply system is provided with a gas turbine inlet cooler to realize the gas turbine inlet cooling function; the regional cold supply system is provided with a heat exchange mechanism and a heat storage water tank to realize the function of hot water supply. The invention has a useful cooling path and a waste heat consumption path, and can meet the requirements of peripheral users, fully utilize waste heat and improve the energy utilization rate of the regional cooling system.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of part A of FIG. 1;
FIG. 3 is a schematic view of the structure of part B of FIG. 1;
FIG. 4 is a schematic view of the structure of part C of FIG. 1;
FIG. 5 is a schematic view of the structure of the portion D in FIG. 1;
FIG. 6 is a schematic view of the structure of the section E in FIG. 1;
FIG. 7 is a schematic view of the structure of the portion F in FIG. 1;
FIG. 8 is a schematic view of the structure of the portion G of FIG. 1;
FIG. 9 is a schematic view of the structure of part H in FIG. 1;
FIG. 10 is a schematic view of the structure of part I of FIG. 1;
FIG. 11 is a schematic view of the J-shaped portion of FIG. 1;
FIG. 12 is a schematic view of the structure of the portion K in FIG. 1;
FIG. 13 is a schematic view of the L-shaped portion of FIG. 1;
FIG. 14 is a schematic view of the M-section structure of FIG. 1;
FIG. 15 is a schematic view of the structure of the portion N in FIG. 1;
FIG. 16 is a schematic view of the structure of the O-shaped part in FIG. 1;
fig. 17 is an illustration of fig. 2-16.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
In the description of the embodiments of the present invention, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, or the orientation or the positional relationship which is conventionally understood by those skilled in the art, is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or the element which is indicated must have a specific orientation, be constructed in a specific orientation and operate, and thus, cannot be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Example one
As shown in fig. 1-16 (for the sake of clarity, fig. 1 is particularly decomposed into 15 sub-structural diagrams, i.e., a-O, for more clearly showing the system, because the system diagram is too large), a multi-purpose district cooling system is provided to solve the technical problems that the existing district cooling system only provides cold water for air conditioning or industrial cooling for peripheral users, the system function is single, waste heat cannot be fully utilized, and the improvement of energy utilization rate is not facilitated.
The multi-use area cooling system includes: the system comprises a lithium bromide refrigerating unit, an electric refrigerating unit, a heat exchange mechanism, a cooling tower, a heat storage water tank, a cold storage water tank and a gas turbine inlet air cooler; the lithium bromide refrigerating unit is respectively connected with the gas turbine inlet cooler and the cold accumulation water tank and provides a cold source; the cold accumulation water tank is connected with the gas inlet cooler of the gas turbine; the heat exchange mechanism is respectively connected with the lithium bromide refrigerating unit and the heat storage water tank; the cooling tower is respectively connected with the lithium bromide refrigerating unit and the electric refrigerating unit. Cold accumulation water tank: the cold storage device is used for cold storage; combustion engine intake air cooler: used for cooling the combustion engine inlet air; heat exchange mechanism and heat accumulation water pitcher: for providing hot water. The regional cold supply system scheme of the invention can not only meet the cold load of peripheral users, but also provide high-temperature hot water for the users, and the system has the functions of cold accumulation, gas turbine inlet air cooling and high-temperature hot water.
Preferably, in order to realize hot water transportation, the heat storage water tank of the invention is further connected with a hot water pressurizing pump parallel pipeline, the hot water pressurizing pump parallel pipeline comprises two branches, each branch is sequentially provided with a butterfly valve, a rubber soft joint, a reducer and a hot water pressurizing pump from left to right, and the hot water pressurizing pump is configured by 2 x 100%. The front end of the parallel pipeline of the hot water pressure pump is provided with a hand-operated brush type filter and a local thermometer. The rear end of the parallel pipeline of the hot water pressure pump is provided with a gate valve. The pipeline connected with the gate valve can be connected to a water carrying tanker.
Example two
The embodiment is similar to the first embodiment, and is different in that each device or component is selected, wherein in order to meet the requirement of building air-conditioning cold load in a factory during the debugging period of an energy station, an open cooling tower is adopted as the cooling tower; the electric refrigerating unit adopts a water-cooling screw type electric refrigerating unit, as shown in fig. 12, the water-cooling screw type electric refrigerating unit comprises an evaporator, a condenser, a compressor and an electric cabinet. For better heat supply, the heat exchange mechanism adopts an integral heat exchange unit. The integral heat exchange unit has the advantages of convenience in installation, reliability in operation, controllable hot water flow and the like. The lithium bromide refrigerating unit adopts a hot water type lithium bromide unit or a steam type lithium bromide unit, and the hot water type lithium bromide unit comprises a generator, a condenser, an evaporator, an absorber and an electric cabinet as shown in figure 8. The lithium bromide refrigerating unit utilizes the characteristic that the boiling point of water is lowered in a high vacuum state to refrigerate, and is widely applied to the field of refrigeration at present, in particular to air conditioning refrigeration.
EXAMPLE III
The heat source of the invention is from a heat engine flue gas heat exchanger, and the lithium bromide refrigerating unit is connected with the heat engine flue gas heat exchanger and obtains the heat source from the heat engine flue gas heat exchanger. The heat engine smoke heat exchanger is also connected with the heat exchange mechanism. A hot water supply pipe and a hot water return pipe are arranged between the lithium bromide refrigerating unit and the heat engine flue gas heat exchanger; a hot water supply pipe and a hot water return pipe are arranged between the lithium bromide refrigerating unit and the heat exchange mechanism. A cooling water supply pipe and a cooling water return pipe are arranged between the cooling tower and the lithium bromide refrigerating unit. And a bromine cooler cooling water pump is arranged on a cooling water supply pipe between the cooling tower and the lithium bromide refrigerating unit, the bromine cooler cooling water pump is configured according to 3 multiplied by 50%, and the bromine cooler cooling water pump runs at power frequency. A cooling water supply pipe and a cooling water return pipe are arranged between the cooling tower and the electric refrigerating unit.
An electric valve is arranged between a hot water supply pipe and a hot water return pipe which are connected with the heat engine smoke heat exchanger. The hot water supply pipe of the heat engine flue gas heat exchanger generally provides hot water at 103 ℃, and the temperature in the hot water return pipe of the heat engine flue gas heat exchanger is generally about 75 ℃, for example, 70 ℃ to 80 ℃.
The invention is provided with the cooling water supply pipe and the cooling water return pipe, thereby being convenient for fully utilizing resources. As shown in fig. 5, the water source of the cooling tower is from two parts, one part is from the industrial water supplement, and the other part is from the return water of the lithium bromide refrigerating unit and the electric refrigerating unit, and the water resource is reused in a return water reuse mode.
Example four
This embodiment is similar to the first, second, or third embodiments, except that the present invention is configured as follows for a multi-use area cooling system.
The lithium bromide refrigeration unit is connected with the water separator through a cold water supply pipe, and the water separator can directly provide cold water (cooling water supply) for users outside the plant (as shown in fig. 11, the users outside the plant comprise a user 1 outside the plant and a user 2 outside the plant); the water separator is connected with the gas inlet cooler of the combustion engine, so that the lithium bromide refrigerating unit supplies cold to the gas inlet cooler of the combustion engine. Preferably, the water separator is also connected to a plate heat exchanger, which directly supplies cold water to the building in the plant.
The invention also comprises a water collector, wherein the water collector is connected with the plate heat exchanger, the plate heat exchanger is connected with the cold water pump of the electric refrigerator through a cold water supply pipe, and the water source of the cold water pump of the electric refrigerator comes from the cold supply backwater built in a factory, namely the cold water pump of the electric refrigerator is connected with a cold water backwater pipe.
The electric refrigerator cold water pump is connected with the electric refrigerating unit or the water-cooling screw type electric refrigerating unit, and the electric refrigerator cooling water pump is arranged on a cooling water supply pipe between the electric refrigerating unit and the cooling tower. Two cold water pumps of the electric refrigerator are arranged and configured according to 2 multiplied by 100 percent, and both the pumps run at power frequency. Two cooling water pumps of the electric refrigerator are arranged and configured according to 1 multiplied by 100 percent, and the electric refrigerator runs at power frequency.
The water collector is connected with a bromine cold machine cold water pump through a cold water return pipe, the bromine cold machine cold water pump is connected with a lithium bromide refrigerating unit, and 3 bromine cold machine cold water pumps are arranged and configured according to 3 multiplied by 50%.
As shown in fig. 15, the cooling return water of the off-site users (including the off-site user 1 and the off-site user 2) can directly flow to the water collector, that is, the cooling return water pipe of the off-site user is connected to the water collector, and the cooling return water pipe of the off-site user is provided with a pressure sensor, a flow sensor and a temperature sensor with remote readings. The cold supply and return pipe of the outdoor user is also provided with a butterfly valve and a constant pressure differential dynamic balance valve.
The water pump pipe section is sequentially provided with a butterfly valve, an automatic brush type filter, a rubber soft joint, a reducer, a water pump (such as the water pump of the invention, the water pump of the electric refrigerator, the water pump of the bromine refrigerator or the water pump of the bromine refrigerator), the reducer, the rubber soft joint, a check valve and the butterfly valve along the water flow direction. A drain pipe is arranged between the automatic brush type filter and the adjacent rubber soft joint, and a ball valve is arranged on the drain pipe. Adjusting pipe sections are connected in parallel at two ends of a water pump pipe section where the electric-cooling-machine cold water pump or the bromine-cooling-machine cold water pump is located, and a butterfly valve, an electric proportional adjusting valve and a butterfly valve are sequentially arranged in the adjusting pipe sections from left to right. Check valves are connected in parallel at two ends of a water pump pipe section where the bromine cooler cold water pump is located.
The front end of the water pump pipe section where the bromine-cooling machine cold water pump is located is provided with a bromine-cooling machine cold water constant-pressure water-supplementing vacuum exhaust device, an expansion water pipe, two valves (such as stop valves) and a ninth electric valve V9 arranged between the bromine-cooling machine cold water constant-pressure water-supplementing vacuum exhaust device and the water pump pipe section where the bromine-cooling machine cold water pump is located are arranged between the bromine-cooling machine cold water constant-pressure water-supplementing vacuum exhaust device and the water. Other electrically operated valves of the present invention are arranged as follows:
as shown in fig. 11, a first electric valve V1 is provided on the cold water return pipe between the plate heat exchanger and the electric cooler cold water pump, and butterfly valves are provided on both sides of the first electric valve V1.
As shown in fig. 10, a second electric valve V2 is provided on a cold water supply pipe between the plate heat exchanger and the water separator, and butterfly valves are provided on both sides of the second electric valve V2.
As shown in fig. 15, a third electric valve V3 is arranged on the cold water return pipe between the engine intake cooler and the water collector, and a butterfly valve and a flow sensor are arranged between the third electric valve V3 and the engine intake cooler. Two cold accumulation water tanks connected in parallel are arranged, and a demineralized water inlet is arranged on each cold accumulation water tank. A fourth electric valve V4 is arranged on a pipeline between the cold storage water tank and the water collector, and butterfly valves are arranged on two sides of the fourth electric valve V4. And a local pressure gauge, a pressure sensor with remote reading, a local thermometer and a temperature sensor with remote reading are arranged on a pipeline between the fourth electric valve V4 and the cold storage water tank.
And 3 cold water pumps are arranged between the cold storage water tank and the gas turbine intake cooler, and are configured according to 3 multiplied by 50 percent and run at power frequency. The water outlet pipeline of the cold water pump is provided with a reducer, a rubber soft joint, a local pressure gauge, a check valve and a butterfly valve. A water inlet pipeline of the cold water pump is provided with a reducer, a rubber soft joint, an automatic brush type filter and a butterfly valve, wherein a sewage discharge pipe with a valve is arranged between the rubber soft joint and the automatic brush type filter. The pipelines of the three cold water pumps are all arranged according to the above, and the pipelines of the three cold water pumps are connected in parallel.
As shown in fig. 16, a fifth electric valve V5 is provided on a cold water supply pipe between the lithium bromide refrigerator set and the cold storage water tank, a butterfly valve is provided on the water inlet side of the fifth electric valve V5, and a constant flow rate dynamic balance valve and a butterfly valve are provided on the water outlet side of the fifth electric valve V5. The water inlet side of the cold accumulation water tank is provided with a local pressure gauge, a pressure sensor with remote reading, a local thermometer, a temperature sensor with remote reading and a flow sensor. A sixth electric valve V6 is arranged between the cold accumulation water tank and the cold discharge water pump, and butterfly valves are arranged on two sides of the sixth electric valve V6.
And a seventh electric valve V7 is arranged on a water inlet pipeline of the water separator, and butterfly valves are arranged on two sides of the seventh electric valve V7. An eighth electric valve V8 is arranged on a cold water supply pipe between the water separator and the gas turbine intake cooler, a butterfly valve is arranged on the water inlet side of the eighth electric valve V8, and an electric proportional control valve and a butterfly valve are arranged on the water outlet side of the eighth electric valve V8. The electric proportional control valve is controlled by a temperature sensor signal with remote reading arranged on the water collector.
As shown in fig. 15, a tenth electric valve V10 is provided on a cold water return pipe between the water collector and the engine intake cooler, and butterfly valves are provided on both sides of the tenth electric valve V10.
The front end of the parallel pipeline of the cold water pump of the electric refrigerator is provided with a cold water constant-pressure water-supplementing vacuum exhaust device of the electric refrigerator.
A heat source water pump parallel pipeline is arranged on a hot water return pipe between a heat engine flue gas heat exchanger and an integral heat exchange unit or a lithium bromide refrigerating unit and comprises three branches, and a butterfly valve, a check valve, a local pressure gauge, a rubber soft joint, a reducer, a heat source water pump, a reducer, a rubber soft joint, an automatic brush type filter and a butterfly valve are arranged on each branch from left to right. Wherein, a sewage discharge pipe with a valve is arranged between the automatic brush type filter and the adjacent rubber soft joint.
And a heat source water constant-pressure water supplementing vacuum exhaust device is arranged on a pipeline between the heat source water pump parallel pipeline and the integral heat exchange unit or the lithium bromide refrigerating unit.
Other arrangements of the invention are shown in fig. 2-16, which are illustrated in fig. 17.
A control method of a multipurpose zone cooling system comprises the following working conditions:
working condition 1: the lithium bromide refrigerating unit is closed, only the electric refrigerating unit operates, and cold is supplied to the factory;
working condition 2: when the cold load demand of users outside the plant is reduced, if the lithium bromide refrigerating unit is in a high-temperature time period in the daytime, the surplus cold energy of the lithium bromide refrigerating unit does not enter the cold accumulation water tank and is directly used for cooling the inlet air of the combustion engine;
working condition 3: when the cold load demand of the user outside the factory is reduced, if the temperature is low at night, the surplus cold energy of the lithium bromide refrigerating unit enters the cold accumulation water tank for cold accumulation; or the surplus hot water of the flue gas heat exchanger is supplied to the integral heat exchange unit to prepare high-temperature hot water at the temperature of 80 ℃ or above and then stored in a heat storage water tank;
working condition 4: and (3) cooling working condition: in the daytime when the air temperature is high, cold water in the cold accumulation water tank is discharged and enters the gas inlet cooler of the gas turbine to cool the gas inlet of the gas turbine;
the working condition 1 is a debugging period working condition, and the working conditions 2-4 are normal operation period working conditions; in the normal operation period, the lithium bromide refrigerating unit is put into operation to supply cold to users outside the plant and/or buildings inside the plant, and the electric refrigerating unit is closed.
In a preferred embodiment, the equipment operates as follows under different conditions:
note: in the table, "+" indicates that the equipment does not run under the working condition, running "indicates running, and equipment indicates standby; 1 operation in working condition 3(a)Indicating that the integrated heat exchanger unit is only operated during the non-charge cooling period.
Under different working conditions, the opening and closing states of the electric valves are as follows:
the on/off state of the electric valve of the external pipeline interface of each refrigerating unit and each module of the cooling tower is consistent with the on/off state of the corresponding refrigerating unit or cooling tower module. The open and close states of other electric valves are as follows:
| V1 | V2 | V3 | V4 | V5 | V6 | V7 | V8 | V9 | V10 | V11 | |
| working condition 1 | Closing device | Closing device | Closing device | Closing device | Closing device | Closing device | Closing device | Closing device | Closing device | Closing device | Closing device |
| Working condition 2 | Opening device | Opening device | Opening device | Closing device | Closing device | Closing device | Opening device | Opening device | Opening device | Opening device | Closing device |
| Working condition 3 | Opening device | Opening device | Closing device | Opening device | Opening device | Closing device | Opening device | Closing device | Closing device | Opening device | Opening device(b) |
| Working condition 4 | Opening device | Opening device | Opening device | Opening device | Closing device | Opening device | Opening device | Closing device | Closing device | Closing device | Closing device |
Note: in the table(b)"indicates that in condition 3, the electrically operated valve V11 is only open for operation of the integrated heat exchange unit.
In summary, the present invention is based on the existing regional cooling system that only provides cold water for air conditioning or industrial cooling for peripheral users, and under the condition of single system function, the system upgrades and reforms the regional cooling system, not only can satisfy the cold load of peripheral users, but also can provide high temperature hot water for users, and the system has the functions of cold storage, gas turbine intake cooling and high temperature hot water.
The cold energy prepared by the regional cold supply system provided by the invention mainly has three consumption ways: air conditioning and combustion engine intake air cooling are built in peripheral cold load users and energy station plants. The system is provided with a cold accumulation water tank, and when the cold load of a user fluctuates along with the weather change or the adjustment of a production task, if the cold load is in a high-temperature period, the surplus cold can be directly used for cooling the inlet air of the combustion engine; and if the surplus cold energy is stored in the cold storage tank in the low-temperature period, the surplus cold energy is used for cooling the inlet air of the combustion engine in the high-temperature period. Therefore, the regional cooling system provided by the invention can be well adapted to the cold load fluctuation of users.
The regional cooling system provided by the invention is provided with an integral heat exchange unit and a heat storage water tank. The heat source water (provided by the flue gas heat exchanger) is not only provided for the hot water type lithium bromide unit as a driving energy source, but also can be used as a heat source of the integral heat exchanger unit. The integral heat exchange unit utilizes heat source water provided by the flue gas heat exchanger to prepare high-temperature hot water sold outside, and the high-temperature hot water is stored in the heat storage water tank, so that surplus waste heat can be further consumed. The regional cooling system provided by the invention overcomes the defect that the system function and the waste heat consumption way of the existing regional cooling system are single.
In summary, the scheme of the regional cooling system provided by the invention integrates cold accumulation, gas turbine inlet air cooling and high-temperature hot water, the waste heat consumption way is not single, the system has diversified functions, the system can be well adapted to the cold load fluctuation of users, the requirements of peripheral users can be met, waste heat can be fully utilized, and the energy utilization rate is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A multi-purpose zone cooling system, comprising: the system comprises a lithium bromide refrigerating unit, an electric refrigerating unit, a heat exchange mechanism, a cooling tower, a heat storage water tank, a cold storage water tank and a gas turbine inlet air cooler; the lithium bromide refrigerating unit is respectively connected with the gas turbine inlet cooler and the cold accumulation water tank and provides a cold source; the cold accumulation water tank is connected with the gas inlet cooler of the gas turbine; the heat exchange mechanism is respectively connected with the lithium bromide refrigerating unit and the heat storage water tank; the cooling tower is respectively connected with the lithium bromide refrigerating unit and the electric refrigerating unit.
2. A multi-use area cooling system according to claim 1, wherein: the lithium bromide refrigerating unit is connected with the heat engine smoke heat exchanger, and obtains a heat source from the heat engine smoke heat exchanger.
3. A multi-use area cooling system according to claim 2, wherein: the heat engine smoke heat exchanger is also connected with the heat exchange mechanism.
4. A multi-use area cooling system according to claim 3, wherein: a hot water supply pipe and a hot water return pipe are arranged between the lithium bromide refrigerating unit and the heat engine flue gas heat exchanger; a hot water supply pipe and a hot water return pipe are arranged between the lithium bromide refrigerating unit and the heat exchange mechanism.
5. A multi-use area cooling system according to claim 1, wherein: the lithium bromide refrigerating unit adopts a hot water type lithium bromide unit or a steam type lithium bromide unit.
6. A multi-use area cooling system according to claim 1, wherein: the cooling tower adopts an open type cooling tower.
7. A multi-use area cooling system according to claim 1, wherein: the electric refrigerating unit adopts a water-cooling screw type electric refrigerating unit.
8. A multi-use area cooling system according to claim 1, wherein: the heat exchange mechanism adopts an integral heat exchange unit.
9. A multi-use area cooling system according to claim 1, wherein: a cooling water supply pipe and a cooling water return pipe are arranged between the cooling tower and the lithium bromide refrigerating unit; a cooling water supply pipe and a cooling water return pipe are arranged between the cooling tower and the electric refrigerating unit.
10. A control method of a multipurpose regional cooling system is characterized in that the regional cooling system comprises the following working conditions: working condition 1: the lithium bromide refrigerating unit is closed, only the electric refrigerating unit operates, and cold is supplied to the factory;
working condition 2: when the cold load demand of users outside the plant is reduced, if the lithium bromide refrigerating unit is in a high-temperature time period in the daytime, the surplus cold energy of the lithium bromide refrigerating unit does not enter the cold accumulation water tank and is directly used for cooling the inlet air of the combustion engine;
working condition 3: when the cold load demand of the user outside the factory is reduced, if the temperature is low at night, the surplus cold energy of the lithium bromide refrigerating unit enters the cold accumulation water tank for cold accumulation; or the surplus hot water of the flue gas heat exchanger is supplied to the integral heat exchange unit to prepare high-temperature hot water at the temperature of 80 ℃ or above and then stored in a heat storage water tank;
working condition 4: and (3) cooling working condition: in the daytime when the air temperature is high, cold water in the cold accumulation water tank is discharged and enters the gas inlet cooler of the gas turbine to cool the gas inlet of the gas turbine;
the working condition 1 is a debugging period working condition, and the working conditions 2-4 are normal operation period working conditions; in the normal operation period, the lithium bromide refrigerating unit is put into operation to supply cold to users outside the plant and/or buildings inside the plant, and the electric refrigerating unit is closed.
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| CN210625000U (en) * | 2019-09-09 | 2020-05-26 | 中国电力工程顾问集团西南电力设计院有限公司 | Multi-purpose regional cooling system |
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| CN103900183A (en) * | 2014-04-17 | 2014-07-02 | 重庆大学 | Multi-energy complementation combined type heat pump air conditioner system for data machine room |
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