CN111503036A - Performance optimization method and device of air cooling unit, readable medium and electronic equipment - Google Patents
Performance optimization method and device of air cooling unit, readable medium and electronic equipment Download PDFInfo
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- CN111503036A CN111503036A CN201910093449.XA CN201910093449A CN111503036A CN 111503036 A CN111503036 A CN 111503036A CN 201910093449 A CN201910093449 A CN 201910093449A CN 111503036 A CN111503036 A CN 111503036A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/303—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/313—Air temperature
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a performance optimization method and a device of an air cooling unit, wherein the method comprises the following steps: s1, collecting operation parameters of the air cooling unit, wherein the operation parameters comprise the rated rotating speed of the fan, the load of the unit, the ambient temperature and the ambient wind speed, and determining a rotating speed interval according to the rated rotating speed of the fan; s2, sequentially determining a current fan rotating speed from the rotating speed interval according to a preset step length; s3, determining the fan power consumption of the air cooling unit according to the current fan rotating speed, the environment temperature and the environment wind speed; s4, determining a unit power increment according to the environment temperature and the unit load; s5, substituting the fan power consumption and the unit power increment into a preset optimization objective function to obtain a current function value; s6, detecting whether the current function value meets the preset condition, if so, executing S7, otherwise, executing S2; and S7, determining the current fan rotating speed as the optimal operating fan rotating speed of the air cooling unit. By the technical scheme of the invention, the operation efficiency of the air cooling unit during operation can be improved.
Description
Technical Field
The invention relates to the technical field of energy, in particular to a performance optimization method and device of an air cooling unit, a readable medium and electronic equipment.
Background
Under the background of the national strong advocation of energy conservation and consumption reduction, the air cooling unit is widely applied to industrial production due to high water saving rate, and the key for realizing energy conservation and consumption reduction is to improve the operating efficiency of the air cooling unit during operation.
At present, the rotating speed of a fan can be simulated through a cold end system and a condenser, and an air cooling unit operates at the rotating speed of the fan simulated by the cold end system and the condenser.
However, the influence of environmental factors (ambient wind speed and ambient temperature) and the fan speed on the operation of the air cooling unit is not fully considered in the fan speed simulated by the cold end system and the condenser, and when the air cooling unit operates at the fan speed simulated by the cold end system and the condenser, the exhaust pressure of a steam turbine in the air cooling unit is higher, so that the energy consumption of the air cooling unit is higher, and the operation efficiency of the air cooling unit is lower.
Disclosure of Invention
The invention provides a performance optimization method and device of an air cooling unit, a readable medium and electronic equipment, which can determine the optimal running fan rotating speed of the air cooling unit based on the ambient wind speed, the ambient temperature and the unit load, and have higher running efficiency when the air cooling unit runs according to the determined optimal running fan rotating speed.
In a first aspect, the present invention provides a performance optimization method for an air-cooled unit, including:
s1, collecting operation parameters of the air cooling unit, wherein the operation parameters comprise the rated rotating speed of a fan, the load of the unit, the ambient temperature and the ambient wind speed, and determining a rotating speed interval according to the rated rotating speed of the fan;
s2, sequentially determining a current fan rotating speed from the rotating speed interval according to a preset step length;
s3, determining the fan power consumption of the air cooling unit according to the current fan rotating speed, the environment temperature carried in the operation parameters and the environment wind speed;
s4, determining the exhaust steam pressure of a steam turbine in the air cooling unit according to the environment temperature carried in the operation parameters, and determining the unit power increment according to the exhaust steam pressure and the unit load carried in the operation parameters;
s5, substituting the fan power consumption and the unit power increment into a preset optimization objective function to obtain a current function value;
s6, detecting whether the current function value meets a preset condition, if so, executing S7, otherwise, executing S2;
and S7, determining the current fan rotating speed as the optimal operating fan rotating speed of the air cooling unit.
Preferably, the first and second electrodes are formed of a metal,
determining the fan power consumption of the air cooling unit according to the current fan rotating speed, the environment temperature carried in the operation parameters and the environment wind speed, wherein the determining comprises the following steps:
determining the intersection point of a fan performance curve and a first air cooling system resistance characteristic curve when no environmental wind influence exists according to the current fan rotating speed and the environmental temperature carried in the operation parameters;
determining a second air-cooling system resistance characteristic curve under the influence of environmental wind according to the intersection point and the environmental wind speed carried in the operation parameters, and determining the intersection point of the fan performance curve and the second air-cooling system resistance characteristic curve as a fan working point of each air-cooling unit in the air-cooling unit, wherein the fan working point comprises fan air flow and fan full pressure;
determining the fan power consumption of the air cooling unit according to the fan working point aiming at each air cooling unit;
and determining the sum of the fan power consumptions of the air cooling units as the fan power consumption of the air cooling unit.
Preferably, the first and second electrodes are formed of a metal,
determining the exhaust steam pressure of a steam turbine in the air cooling unit according to the ambient temperature carried in the operation parameters, and determining the unit power increment according to the exhaust steam pressure and the unit load carried in the operation parameters, wherein the determining comprises the following steps:
determining the steam condensation saturation temperature of a condenser in the air-cooled unit according to the fan air flow carried by the fan working point and the environment temperature carried by the operation parameters;
determining the exhaust steam pressure of a steam turbine in the air cooling unit at the steam condensation saturation temperature;
and determining the power increment of the unit according to the unit load and the exhaust steam pressure carried in the operation parameters.
Preferably, the first and second electrodes are formed of a metal,
the step of determining the rotating speed interval according to the rated rotating speed of the fan comprises the following steps:
determining an upper limit adjustment coefficient and a lower limit adjustment coefficient, wherein the upper limit adjustment coefficient is 1.1, and the lower limit adjustment coefficient is 0.4;
and determining the product of the upper limit adjustment coefficient and the rated rotating speed of the fan as an upper limit rotating speed, determining the product of the lower limit adjustment coefficient and the rated rotating speed of the fan as a lower limit rotating speed, and determining the interval between the lower limit rotating speed and the upper limit rotating speed as a rotating speed interval.
In a second aspect, the present invention provides a performance optimization apparatus for an air cooling unit, including:
the data acquisition module is used for acquiring the operating parameters of the air cooling unit, wherein the operating parameters comprise the rated rotating speed of a fan, the load of the unit, the ambient temperature and the ambient wind speed, and the rotating speed interval is determined according to the rated rotating speed of the fan;
the first rotating speed determining module is used for sequentially determining a current rotating speed of the fan from the rotating speed interval according to a preset step length;
the power consumption determining module is used for determining the fan power consumption of the air cooling unit according to the current fan rotating speed, the environment temperature carried in the operation parameters and the environment wind speed;
the power increment determining module is used for determining the exhaust steam pressure of a steam turbine in the air cooling unit according to the environment temperature carried in the operation parameters and determining the unit power increment according to the exhaust steam pressure and the unit load carried in the operation parameters;
the function value determining module is used for substituting the fan power consumption and the unit power increment into a preset optimization objective function to obtain a current function value;
the detection module is used for detecting whether the current function value meets a preset condition, if so, the second rotating speed determination module is triggered, and otherwise, the first rotating speed determination module is triggered;
and the second rotating speed determining module is used for determining the current rotating speed of the fan as the optimal operating rotating speed of the air cooling unit of the target equipment.
Preferably, the first and second electrodes are formed of a metal,
the power consumption determination module includes: the device comprises an intersection point determining unit, a working point determining unit and a power consumption determining unit; wherein the content of the first and second substances,
the intersection point determining unit is used for determining an intersection point of a fan performance curve and a first air-cooling system resistance characteristic curve when no environmental wind influence exists according to the current fan rotating speed and the environmental temperature carried in the operation parameters;
the working point determining unit is used for determining a second air cooling system resistance characteristic curve under the influence of environmental wind according to the intersection point and the environmental wind speed carried in the operation parameters, and determining the intersection point of the fan performance curve and the second air cooling system resistance characteristic curve as a fan working point of each air cooling unit in the air cooling unit, wherein the fan working point comprises fan air flow and fan full pressure;
and the power consumption determining unit is used for determining the fan power consumption of the air cooling unit according to the fan working point aiming at each air cooling unit, and determining the sum of the fan power consumption of each air cooling unit as the fan power consumption of the air cooling unit.
Preferably, the first and second electrodes are formed of a metal,
the power increment determination module includes: the device comprises a saturation temperature determining unit, an exhaust steam pressure determining unit and a power increment determining unit; wherein the content of the first and second substances,
the saturation temperature determining unit is used for determining the steam condensation saturation temperature of a condenser in the air-cooled unit according to the air flow of the fan carried by the fan working point and the environment temperature carried by the operation parameters;
the exhaust steam pressure determining unit is used for determining the exhaust steam pressure of a steam turbine in the air cooling unit at the steam condensation saturation temperature;
and the power increment determining unit is used for determining the power increment of the unit according to the unit load and the exhaust steam pressure carried in the operation parameters.
Preferably, the first and second electrodes are formed of a metal,
the data acquisition module is used for determining the product of the upper limit adjustment coefficient and the rated rotating speed of the fan as an upper limit rotating speed, determining the product of the lower limit adjustment coefficient and the rated rotating speed of the fan as a lower limit rotating speed, and determining the interval between the lower limit rotating speed and the upper limit rotating speed as a rotating speed interval.
In a third aspect, the invention provides a readable medium comprising executable instructions, which when executed by a processor of an electronic device, perform the method according to any of the first aspect.
In a fourth aspect, the present invention provides an electronic device, comprising a processor and a memory storing execution instructions, wherein when the processor executes the execution instructions stored in the memory, the processor performs the method according to any one of the first aspect.
The invention provides a performance optimization method of an air cooling unit, which comprises the steps of collecting operation parameters of the air cooling unit, wherein the operation parameters comprise rated rotating speed of a fan, unit load, ambient temperature and ambient wind speed, determining a rotating speed interval according to the rated rotating speed of the fan, sequentially determining a current rotating speed of the fan from the rotating speed interval according to a preset step length when the optimal operating rotating speed of the air cooling unit is required to be determined, determining the power consumption of the fan of the air cooling unit according to the current rotating speed of the fan, the ambient temperature and the ambient wind speed carried in the operation parameters, then determining the exhaust pressure of a steam turbine in the air cooling unit according to the ambient temperature carried in the operation parameters, determining the power increment of the unit according to the exhaust pressure and the unit load carried in the operation parameters, and then substituting the power consumption of the fan and the power increment of the unit into a preset optimization objective function to obtain a current function value, the current function value can reflect the operation efficiency of the air cooling unit when the air cooling unit operates at the current fan rotating speed and the operation parameters, the larger the current function value is, the higher the operation efficiency of the air cooling unit when the air cooling unit operates at the current fan rotating speed and the operation parameters is, then, whether the current function value meets the preset conditions or not is detected, if the current function value meets the preset conditions, the operation efficiency of the air cooling unit when the air cooling unit operates at the current fan rotating speed and the operation parameters is higher, then, the current fan rotating speed can be determined to be the optimal operation fan rotating speed of the air cooling unit, and if the current function value does not meet the preset conditions, the current operation rotating speed is determined from the rotating speed interval. In summary, according to the technical scheme provided by the embodiment of the invention, the optimal running fan rotating speed of the air cooling unit can be determined based on the environment wind speed, the environment temperature and the unit load, and the air cooling unit has higher running efficiency when running according to the determined optimal running fan rotating speed.
Further effects of the above-mentioned unconventional preferred modes will be described below in conjunction with specific embodiments.
Drawings
In order to more clearly illustrate the embodiments or the prior art solutions of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic flow chart of a method for optimizing performance of an air cooling unit according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of another performance optimization method for an air cooling unit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a performance optimization device of an air cooling unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another performance optimization device for an air cooling unit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a performance optimization apparatus of an air cooling unit according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail and completely with reference to the following embodiments and accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a performance optimization method for an air cooling unit, including the following steps:
s1, collecting operation parameters of the air cooling unit, wherein the operation parameters comprise the rated rotating speed of a fan, the load of the unit, the ambient temperature and the ambient wind speed, and determining a rotating speed interval according to the rated rotating speed of the fan;
s2, sequentially determining a current fan rotating speed from the rotating speed interval according to a preset step length;
s3, determining the fan power consumption of the air cooling unit according to the current fan rotating speed, the environment temperature carried in the operation parameters and the environment wind speed;
s4, determining the exhaust steam pressure of a steam turbine in the air cooling unit according to the environment temperature carried in the operation parameters, and determining the unit power increment according to the exhaust steam pressure and the unit load carried in the operation parameters;
s5, substituting the fan power consumption and the unit power increment into a preset optimization objective function to obtain a current function value;
s6, detecting whether the current function value meets a preset condition, if so, executing S7, otherwise, executing S2;
and S7, determining the current fan rotating speed as the optimal operating fan rotating speed of the air cooling unit.
As shown in fig. 1, the method collects the operation parameters of the air-cooling unit, the operation parameters include the rated rotation speed of the fan, the unit load, the ambient temperature and the ambient wind speed, and determines the rotation speed interval according to the rated rotation speed of the fan, when the optimal operation fan rotation speed of the air-cooling unit needs to be determined, a current fan rotation speed can be sequentially determined from the rotation speed interval according to the preset step length, the fan power consumption of the air-cooling unit is determined according to the current fan rotation speed, the ambient temperature and the ambient wind speed carried in the operation parameters, then the exhaust pressure of the turbine in the air-cooling unit is determined according to the ambient temperature carried in the operation parameters, the unit power increment is determined according to the exhaust pressure and the unit load carried in the operation parameters, and then the fan power consumption and the unit power increment can be substituted into the preset optimization objective function to obtain the current function value, the current function value can reflect the operation efficiency of the air cooling unit when the air cooling unit operates at the current fan rotating speed and the operation parameters, the larger the current function value is, the higher the operation efficiency of the air cooling unit when the air cooling unit operates at the current fan rotating speed and the operation parameters is, then, whether the current function value meets the preset conditions or not is detected, if the current function value meets the preset conditions, the operation efficiency of the air cooling unit when the air cooling unit operates at the current fan rotating speed and the operation parameters is higher, then, the current fan rotating speed can be determined to be the optimal operation fan rotating speed of the air cooling unit, and if the current function value does not meet the preset conditions, the current operation rotating speed is determined from the rotating speed interval.
In summary, according to the technical scheme provided by the embodiment of the invention, the optimal running fan rotating speed of the air cooling unit can be determined based on the environment wind speed, the environment temperature and the unit load, and the air cooling unit has higher running efficiency when running according to the determined optimal running fan rotating speed.
Specifically, the air cooling unit mainly comprises a plurality of air cooling units, a steam turbine, a plurality of steam turbine exhaust pipelines and a plurality of generators (generator sets), wherein the steam turbine exhaust pipelines are mainly used for conveying steam in the steam turbine (for the steam entering the steam turbine, the steam turbine can convert steam heat energy into rotary mechanical energy of a steam turbine shaft, and then the steam turbine can also have steam with certain temperature and pressure) to condensers of the air cooling units; the steam turbine mainly converts steam heat energy into rotary mechanical energy of a steam turbine shaft; the generator set mainly converts the rotary mechanical energy of the shaft of the turbine into electric energy; the air cooling unit mainly comprises a condenser, a cooling fan and a motor, wherein the motor mainly provides energy for the cooling fan so as to ensure that the cooling fan can normally operate; the condenser is mainly used for condensing steam conveyed by a steam turbine exhaust pipeline into condensed water under the action of a cooling fan; the cooling fan mainly provides fan air flow (the temperature of the fan air flow is lower than that of steam in the condenser), so that the steam in the condenser is condensed into condensed water.
It should be noted that the rated fan power and the model of the cooling fan in each air cooling unit are the same, that is, the rated fan speed of the cooling fan in each air cooling unit is the same, the rated fan speed represents the speed that the cooling fan should generate under the rated power in unit time, and the unit load represents the ratio of the actual output power to the output power in unit time of the generator set, that is, the ratio of the actual power supply amount to the power supply amount in unit time of the generator set.
It should be further noted that at least two data are arranged in a descending order or a descending order, the difference value between the latter data and the former data is the step length, and then a current fan rotating speed is determined from the rotating speed interval according to the preset step length in sequence, specifically, when a current fan rotating speed is determined each time, the previous fan rotating speed is determined, and the sum of the previous fan rotating speed and the step length is determined as the current fan rotating speed again; and determining the current fan rotating speed for the first time as the lower limit rotating speed in the rotating speed interval range.
For example, taking a rotation speed interval of 400 to 1100 and a set step size of 10 as an example, when a current fan rotation speed is determined for the first time, the current fan rotation speed is determined to be 400, when a current fan rotation speed is determined for the second time, the previous fan rotation speed is determined to be 400, the sum of the previous fan rotation speed 400 and the step size 10 is re-determined to be the current fan rotation speed 410, when a current fan rotation speed is determined for the third time, the previous fan rotation speed is determined to be 410, the sum of the previous fan rotation speed 410 and the step size 10 is re-determined to be the current fan rotation speed 420, and based on the same principle, the current fan rotation speed determination process is stopped until the current fan rotation speed determined for the nth time is the optimal operating fan rotation speed of the air cooling unit.
As will be understood by those skilled in the art, the current function value can be obtained by substituting the fan power consumption and the unit power increment into an optimization objective function, where the optimization objective function is as follows:
F＝max(ΔPe-N)＝f1(n，ta，vf)-f2(n，ta，vf)
wherein, Δ PeRepresenting the power increment of the unit after increasing the rotating speed of the fan, N representing the power consumption of the fan, N representing the rotating speed of the fan, taCharacterisation of the ambient temperature, vfCharacterizing ambient wind speed, f1(n，ta，vf) Characterizing the power increment of the unit after increasing the rotational speed of the fan at the rotational speed of the fan, the ambient temperature and the ambient wind speed, f2(n，ta，vf) And characterizing the power consumption of the fan under the rotating speed, the ambient temperature and the ambient wind speed of the fan.
The current function value is a difference value between the unit power increment and the fan power consumption determined under a certain environment wind speed, environment temperature, unit load and fan rotating speed, and the larger the difference value is, the higher the running efficiency of the air cooling unit when running under the fan rotating speed and the running parameters corresponding to the current function value is.
It should be further noted that the present invention is focused on the method for determining the optimum operating speed of the air-cooled unit based on the ambient wind speed, the ambient temperature, and the unit load, and therefore, the calculation formula and the calculation process of the fan power consumption and the unit power increment are not specifically described.
Specifically, the following two implementation modes 1 and 2 can be used for determining the current fan rotating speed as the optimal operating fan rotating speed of the air cooling unit when the current function value meets the preset condition.
In the implementation mode 1, when the current function value is greater than or equal to the preset threshold value, the rotating speed of the fan corresponding to the current function value is determined to be the optimal operating rotating speed of the air cooling unit.
In implementation mode 2, the rotating speeds of the fans are sequentially determined from the rotating speed interval according to the preset step length, the function value corresponding to each rotating speed of the fans can be determined through the similar process, then, each function value can be sequenced from large to small, the sequence position of each function value is determined, the function value located at the head in the sequence position is detected, and the rotating speed of the fan corresponding to the function value located at the head is determined as the optimal operating rotating speed of the air-cooled unit.
For example, the rotation speed interval is set to be 100-200, the preset step length is 20, the determined fan rotation speeds are 100, 120, 140, 160, 180, and 200, the function values corresponding to the fan rotation speeds are determined to be 20, 40, 80, 120, 100, and 70 through the similar process, the sequence of the function values from large to small is 120, 100, 80, 70, 40, 20, and 0.3, the sequence bits corresponding to 20, 40, 80, 120, 100, and 70 are 6, 5, 3, 1, 2, and 4, at this time, the function value located at the head in the sequence bits can be detected to be 120, and the fan rotation speed 160 corresponding to the function value 120 located at the head can be determined to be the optimal operating fan rotation speed of the air-cooling unit.
For the implementation 1, the preset threshold may be an empirical value set in an actual service scenario in combination with the air-cooling unit.
In an embodiment of the present invention, the determining the fan power consumption of the air cooling unit according to the current fan rotation speed, the environment temperature carried in the operation parameter, and the environment wind speed includes:
determining the intersection point of a fan performance curve and a first air cooling system resistance characteristic curve when no environmental wind influence exists according to the current fan rotating speed and the environmental temperature carried in the operation parameters;
determining a second air-cooling system resistance characteristic curve under the influence of environmental wind according to the intersection point and the environmental wind speed carried in the operation parameters, and determining the intersection point of the fan performance curve and the second air-cooling system resistance characteristic curve as a fan working point of each air-cooling unit in the air-cooling unit, wherein the fan working point comprises fan air flow and fan full pressure;
determining the fan power consumption of the air cooling unit according to the fan working point aiming at each air cooling unit;
and determining the sum of the fan power consumptions of the air cooling units as the fan power consumption of the air cooling unit.
In this embodiment, according to the fan proportionality law, the intersection point of the fan performance curve carried in the operation parameters and at the current fan rotation speed and the first air-cooling system resistance characteristic curve can be determined, the fan performance curve can reflect the relationship between the fan air flow and the pressure generated when the cooling fan operates, that is, the pressure generated when the cooling fan operates continuously decreases with the continuous increase of the fan air flow, the first air-cooling system resistance characteristic curve can reflect the relationship between the fan air flow and the pressure drop of the air passing through the air-cooling unit without the influence of the ambient wind, that is, the pressure drop of the air passing through the air-cooling unit continuously increases with the continuous increase of the fan air flow, and for the intersection point of the fan performance curve and the air-cooling system resistance characteristic curve, the intersection point represents the cooling fan under the given conditions (fan rotation speed, fan speed, ambient temperature) and the fan air flow during operation, the cooling fan is operated outdoors, the ambient air speed in the outdoor environment has a large influence on the operation parameters (fan pressure and fan air flow) of the cooling fan, at this time, a second air-cooling system resistance characteristic curve under the influence of ambient air needs to be redetermined according to the ambient air speed carried in the operation parameters, the second air-cooling system resistance characteristic curve can reflect the relationship between the fan air flow under the influence of ambient air and the pressure drop of air passing through the air-cooling unit, at this time, the intersection point of the second air-cooling system resistance characteristic curve and the fan performance curve can be determined as a fan working point, the fan working point can indicate that the cooling fan is in an energy balance state during operation, and the fan working point comprises the fan air flow and the fan full pressure during operation of the cooling fan under the current fan rotating speed, the ambient temperature carried by the operation parameters and the ambient air speed, the operating condition of cooling blower when this fan operating point moves is stable and operating efficiency is higher, the fan of each air-cooled unit all moves under this fan operating point, so that each air-cooled unit is in stable and efficient operating condition in the air-cooled unit, afterwards, calculate the fan consumption of each air-cooled unit according to this fan operating point, add the fan consumption of each air-cooled unit and can confirm the fan consumption of air-cooled unit, determine the fan consumption of air-cooled unit under the current fan rotational speed promptly, the environmental wind speed that carries and ambient temperature in the operational parameter, it is obvious, it will increase the fan consumption to improve the fan rotational speed.
It should be noted that the fan power consumption of the air-cooling unit specifically refers to the total energy consumed by the motor of each air-cooling unit in unit time when the cooling fan of each air-cooling unit operates at the fan operating point.
Obviously, a person skilled in the art can easily obtain a calculation formula of fan energy consumption through the prior art, and obtain the fan energy consumption of each air cooling unit according to the existing calculation formula of fan energy consumption, so the calculation formula and the calculation process of fan energy consumption are not specifically described in the present invention.
In an embodiment of the present invention, the determining an exhaust pressure of a steam turbine in the air-cooled unit according to the ambient temperature carried in the operating parameter, and determining a unit power increment according to the exhaust pressure and the unit load carried in the operating parameter includes:
determining the steam condensation saturation temperature of a condenser in the air-cooled unit according to the fan air flow carried by the fan working point and the environment temperature carried by the operation parameters;
determining the exhaust steam pressure of a steam turbine in the air cooling unit at the steam condensation saturation temperature;
and determining the power increment of the unit according to the unit load and the exhaust steam pressure carried in the operation parameters.
In this embodiment, the steam condensation saturation temperature refers to the temperature of steam and liquid when the steam and the liquid are in a dynamic equilibrium state, that is, the temperature of the liquid and the steam is equal, the steam condensation saturation temperature of a condenser of an air-cooled unit can be determined according to the ambient temperature and the air flow of a fan carried by a fan working point, a certain saturation temperature of the steam must correspond to a certain saturation pressure of the steam, and then the steam condensation saturation pressure corresponding to the steam condensation saturation temperature can be determined, at this time, the exhaust pressure of a turbine in the air-cooled unit can be determined according to the steam condensation saturation pressure (the exhaust pressure of the turbine is mainly calculated from the condenser pressure and the main loss between the exhaust port of the turbine and the inlet of the condenser), after the turbine converts the steam heat energy into the rotating mechanical energy of the turbine shaft, the turbine still has steam with a certain temperature and pressure, and the pressure of the steam is the exhaust pressure, meanwhile, the steam can enter a condenser through a steam turbine exhaust pipeline, and the condenser condenses the steam into condensed water under the action of a cooling fan. When the operation parameters (unit load, ambient temperature and ambient wind speed) are fixed, if the fan rotating speed is increased, the exhaust pressure can be reduced, on the premise that the blocking backpressure is not exceeded, the unit power increment can be increased along with the reduction of the exhaust pressure of the steam turbine, the unit power increment corresponding to the exhaust pressure of the steam turbine under the unit load carried in the operation parameters can be determined by utilizing a universal algorithm of the steam turbine power backpressure characteristic, and the unit power increment under the current fan rotating speed and the operation parameters is determined.
It should be noted that the unit power increment specifically refers to the total energy generated by each generator in unit time when the cooling fan of each air cooling unit operates at the fan operating point.
Obviously, a person skilled in the art can easily obtain the calculation method of the steam exhaust pressure and the unit power increment of the steam turbine through the prior art, so the calculation formula and the calculation process of the steam exhaust pressure and the unit power increment of the steam turbine are not specifically described in the invention.
In an embodiment of the present invention, the determining a rotation speed interval according to the rated rotation speed of the fan includes:
determining an upper limit adjustment coefficient and a lower limit adjustment coefficient, wherein the upper limit adjustment coefficient is 1.1, and the lower limit adjustment coefficient is 0.4;
and determining the product of the upper limit adjustment coefficient and the rated rotating speed of the fan as an upper limit rotating speed, determining the product of the lower limit adjustment coefficient and the rated rotating speed of the fan as a lower limit rotating speed, and determining the interval between the lower limit rotating speed and the upper limit rotating speed as a rotating speed interval.
In the embodiment, the lower limit rotating speed of the rotating speed interval is determined as the product of 0.4 and the rated rotating speed of the fan, the upper limit rotating speed of the rotating speed interval is determined as the product of 1.1 and the rated rotating speed of the fan, the interval between the upper limit rotating speed and the lower limit rotating speed is determined as the rotating speed interval, when the rotating speed of the fan is lower than the lower limit rotating speed or exceeds the upper limit rotating speed, namely the rotating speed of the fan is not in the rotating speed interval, the rotating speed of the fan has no reference value or has a small reference value, and when and only when the rotating speed of the fan is between the lower limit rotating speed and the upper limit rotating speed, namely the rotating speed of the fan is in the.
For example, taking the rated rotation speed of the fan as 200 as an example, the lower limit rotation speed is 80, the upper limit rotation speed is 220, the rotation speed interval is 80-220, the value range of the fan rotation speed is 80-220, and the fan rotation speed selected when the cooling fan operates is always in the interval, that is, the fan rotation speed in the interval has a relatively high reference value.
To more clearly illustrate the technical solution of the present invention, referring to fig. 2, an embodiment of the present invention provides another performance optimization method for an air cooling unit, which specifically includes the following steps:
And 203, sequentially determining a current fan rotating speed from the rotating speed interval according to the preset step length.
Step 204: and determining the intersection point of the fan performance curve and the first air cooling system resistance characteristic curve when no environmental wind influence exists according to the current fan rotating speed and the environmental temperature carried in the operation parameters.
And step 205, determining a second air-cooling system resistance characteristic curve according to the intersection point and the ambient wind speed carried in the operation parameters, and determining the intersection point of the fan performance curve and the second air-cooling system resistance characteristic curve as the fan working point of each air-cooling unit in the air-cooling unit.
And step 206, determining the fan power consumption of the air cooling units according to the fan working points for each air cooling unit, and determining the sum of the fan power consumption of each air cooling unit as the fan power consumption of the air cooling unit.
And step 207, determining the steam condensation saturation temperature of a condenser in the air cooling unit according to the environment temperature carried in the working point and the operation parameter of the fan, and determining the exhaust pressure of a steam turbine in the air cooling unit at the steam condensation saturation temperature.
And 208, determining the power increment of the unit according to the load and the exhaust steam pressure of the unit carried in the operation parameters.
And 209, substituting the power consumption of the fan and the unit power increment into a preset optimization objective function to obtain a current function value.
And step 211, determining the current fan rotating speed as the optimal operating fan rotating speed of the air cooling unit.
Based on the same concept as the method embodiment of the present invention, referring to fig. 3, an embodiment of the present invention further provides a performance optimization apparatus for an air cooling unit, including:
the data acquisition module 301 is configured to acquire operation parameters of the air cooling unit, where the operation parameters include a rated rotation speed of the fan, a unit load, an ambient temperature, and an ambient wind speed, and determine a rotation speed interval according to the rated rotation speed of the fan;
a first rotation speed determining module 302, configured to determine a current fan rotation speed from the rotation speed interval in sequence according to a preset step length;
a power consumption determining module 303, configured to determine fan power consumption of the air cooling unit according to the current fan rotation speed, the ambient temperature carried in the operation parameter, and the ambient wind speed;
a power increment determining module 304, configured to determine, according to the ambient temperature carried in the operating parameter, an exhaust steam pressure of a steam turbine in the air-cooled unit, and determine a unit power increment according to the exhaust steam pressure and the unit load carried in the operating parameter;
a function value determining module 305, configured to substitute the fan power consumption and the unit power increment into a preset optimization objective function to obtain a current function value;
a detecting module 306, configured to detect whether the current function value meets a preset condition, if so, trigger the second rotation speed determining module 307, otherwise, trigger the first rotation speed determining module 302;
a second rotation speed determining module 307, configured to determine the current fan rotation speed as an optimal operating fan rotation speed of the air-cooling unit of the target device.
Referring to fig. 4, in an embodiment of the present invention, the power consumption determining module 303 includes: an intersection point determining unit 3031, an operating point determining unit 3032 and a power consumption determining unit 3033; wherein the content of the first and second substances,
the intersection point determining unit 3031 is configured to determine an intersection point of a fan performance curve and a first air-cooling system resistance characteristic curve when no ambient wind is affected according to the current fan rotation speed and the ambient temperature carried in the operating parameter;
the working point determining unit 3032 is configured to determine a second air-cooling system resistance characteristic curve under the influence of ambient wind according to the intersection point and the ambient wind speed carried in the operating parameter, and determine an intersection point of the fan performance curve and the second air-cooling system resistance characteristic curve as a fan working point of each air-cooling unit in the air-cooling unit, where the fan working point includes a fan air flow rate and a fan full pressure;
the power consumption determining unit 3033 is configured to determine, for each air cooling unit, fan power consumption of the air cooling unit according to the fan operating point, and determine a sum of the fan power consumption of each air cooling unit as the fan power consumption of the air cooling unit.
Referring to fig. 5, in an embodiment of the present invention, the power increment determining module 3034 includes: a saturation temperature determination unit 3041, an exhaust steam pressure determination unit 3042, a power increment determination unit 3043; wherein the content of the first and second substances,
the saturation temperature determining unit 3041 is configured to determine a steam condensation saturation temperature of a condenser in the air-cooled unit according to the fan air flow carried by the fan working point and the ambient temperature carried by the operating parameter;
the exhaust steam pressure determining unit 3042 is configured to determine the exhaust steam pressure of the steam turbine in the air cooling unit at the steam condensation saturation temperature;
the power increment determining unit 3043 is configured to determine a unit power increment according to the unit load and the exhaust steam pressure carried in the operating parameter.
Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. On the hardware level, the electronic device includes a processor 601 and a memory 602 storing executable instructions, and optionally further includes an internal bus 603 and a network interface 604. The memory 602 may include a memory 6021, such as a Random-access memory (RAM), and may further include a non-volatile memory 6022 (e.g., at least 1 disk memory); the processor 601, the network interface 604, and the memory 602 may be connected to each other by an internal bus 603, and the internal bus 603 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (extended Industry Standard Architecture) bus, or the like; the internal bus 603 may be divided into an address bus, a data bus, a control bus, etc., and for the sake of illustration only one double-headed arrow is shown in fig. 6, but does not indicate only one bus or one type of bus. Of course, the electronic device may also include hardware required for other services. When the processor 601 executes execution instructions stored by the memory 602, the processor 601 performs the method described in any of the embodiments of the present invention and at least is configured to perform the method described in fig. 1 and 2.
In a possible implementation manner, the processor reads the corresponding execution instruction from the nonvolatile memory to the memory and then runs the execution instruction, and may also obtain the corresponding execution instruction from other devices, so as to form a performance optimization method of the air cooling unit on a logic level. The processor executes the execution instruction stored in the memory, so that the performance optimization method of the air cooling unit provided by any embodiment of the invention is realized through the executed execution instruction.
The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The embodiment of the invention also provides a computer readable medium, which comprises an execution instruction, and when a processor of the electronic device executes the execution instruction, the electronic device executes the method provided in any embodiment of the invention. The electronic device may specifically be the electronic device shown in fig. 6; the execution instruction is a computer program corresponding to a performance optimization device of the air cooling unit.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.
The embodiments of the present invention are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A performance optimization method of an air cooling unit is characterized by comprising the following steps:
s1, collecting operation parameters of the air cooling unit, wherein the operation parameters comprise the rated rotating speed of a fan, the load of the unit, the ambient temperature and the ambient wind speed, and determining a rotating speed interval according to the rated rotating speed of the fan;
s2, sequentially determining a current fan rotating speed from the rotating speed interval according to a preset step length;
s3, determining the fan power consumption of the air cooling unit according to the current fan rotating speed, the environment temperature carried in the operation parameters and the environment wind speed;
s4, determining the exhaust steam pressure of a steam turbine in the air cooling unit according to the environment temperature carried in the operation parameters, and determining the unit power increment according to the exhaust steam pressure and the unit load carried in the operation parameters;
s5, substituting the fan power consumption and the unit power increment into a preset optimization objective function to obtain a current function value;
s6, detecting whether the current function value meets a preset condition, if so, executing S7, otherwise, executing S2;
and S7, determining the current fan rotating speed as the optimal operating fan rotating speed of the air cooling unit.
2. The method of claim 1,
determining the fan power consumption of the air cooling unit according to the current fan rotating speed, the environment temperature carried in the operation parameters and the environment wind speed, wherein the determining comprises the following steps:
determining the intersection point of a fan performance curve and a first air cooling system resistance characteristic curve when no environmental wind influence exists according to the current fan rotating speed and the environmental temperature carried in the operation parameters;
determining a second air-cooling system resistance characteristic curve under the influence of environmental wind according to the intersection point and the environmental wind speed carried in the operation parameters, and determining the intersection point of the fan performance curve and the second air-cooling system resistance characteristic curve as a fan working point of each air-cooling unit in the air-cooling unit, wherein the fan working point comprises fan air flow and fan full pressure;
determining the fan power consumption of the air cooling unit according to the fan working point aiming at each air cooling unit;
and determining the sum of the fan power consumptions of the air cooling units as the fan power consumption of the air cooling unit.
3. The method of claim 2,
determining the exhaust steam pressure of a steam turbine in the air cooling unit according to the ambient temperature carried in the operation parameters, and determining the unit power increment according to the exhaust steam pressure and the unit load carried in the operation parameters, wherein the determining comprises the following steps:
determining the steam condensation saturation temperature of a condenser in the air-cooled unit according to the fan air flow carried by the fan working point and the environment temperature carried by the operation parameters;
determining the exhaust steam pressure of a steam turbine in the air cooling unit at the steam condensation saturation temperature;
and determining the power increment of the unit according to the unit load and the exhaust steam pressure carried in the operation parameters.
4. The method according to any one of claims 1 to 3,
the step of determining the rotating speed interval according to the rated rotating speed of the fan comprises the following steps:
determining an upper limit adjustment coefficient and a lower limit adjustment coefficient, wherein the upper limit adjustment coefficient is 1.1, and the lower limit adjustment coefficient is 0.4;
and determining the product of the upper limit adjustment coefficient and the rated rotating speed of the fan as an upper limit rotating speed, determining the product of the lower limit adjustment coefficient and the rated rotating speed of the fan as a lower limit rotating speed, and determining the interval between the lower limit rotating speed and the upper limit rotating speed as a rotating speed interval.
5. A performance optimization device of an air cooling unit is characterized in that,
the data acquisition module is used for acquiring the operating parameters of the air cooling unit, wherein the operating parameters comprise the rated rotating speed of a fan, the load of the unit, the ambient temperature and the ambient wind speed, and the rotating speed interval is determined according to the rated rotating speed of the fan;
the first rotating speed determining module is used for sequentially determining a current rotating speed of the fan from the rotating speed interval according to a preset step length;
the power consumption determining module is used for determining the fan power consumption of the air cooling unit according to the current fan rotating speed, the environment temperature carried in the operation parameters and the environment wind speed;
the power increment determining module is used for determining the exhaust steam pressure of a steam turbine in the air cooling unit according to the environment temperature carried in the operation parameters and determining the unit power increment according to the exhaust steam pressure and the unit load carried in the operation parameters;
the function value determining module is used for substituting the fan power consumption and the unit power increment into a preset optimization objective function to obtain a current function value;
the detection module is used for detecting whether the current function value meets a preset condition, if so, the second rotating speed determination module is triggered, and otherwise, the first rotating speed determination module is triggered;
and the second rotating speed determining module is used for determining the current rotating speed of the fan as the optimal operating rotating speed of the air cooling unit of the target equipment.
6. The apparatus of claim 5,
the power consumption determination module includes: the device comprises an intersection point determining unit, a working point determining unit and a power consumption determining unit; wherein the content of the first and second substances,
the intersection point determining unit is used for determining an intersection point of a fan performance curve and a first air-cooling system resistance characteristic curve when no environmental wind influence exists according to the current fan rotating speed and the environmental temperature carried in the operation parameters;
the working point determining unit is used for determining a second air cooling system resistance characteristic curve under the influence of environmental wind according to the intersection point and the environmental wind speed carried in the operation parameters, and determining the intersection point of the fan performance curve and the second air cooling system resistance characteristic curve as a fan working point of each air cooling unit in the air cooling unit, wherein the fan working point comprises fan air flow and fan full pressure;
and the power consumption determining unit is used for determining the fan power consumption of the air cooling unit according to the fan working point aiming at each air cooling unit, and determining the sum of the fan power consumption of each air cooling unit as the fan power consumption of the air cooling unit.
7. The apparatus of claim 6,
the power increment determination module includes: the device comprises a saturation temperature determining unit, an exhaust steam pressure determining unit and a power increment determining unit; wherein the content of the first and second substances,
the saturation temperature determining unit is used for determining the steam condensation saturation temperature of a condenser in the air-cooled unit according to the air flow of the fan carried by the fan working point and the environment temperature carried by the operation parameters;
the exhaust steam pressure determining unit is used for determining the exhaust steam pressure of a steam turbine in the air cooling unit at the steam condensation saturation temperature;
and the power increment determining unit is used for determining the power increment of the unit according to the unit load and the exhaust steam pressure carried in the operation parameters.
8. The apparatus according to any one of claims 5 to 7,
the data acquisition module is used for determining the product of the upper limit adjustment coefficient and the rated rotating speed of the fan as an upper limit rotating speed, determining the product of the lower limit adjustment coefficient and the rated rotating speed of the fan as a lower limit rotating speed, and determining the interval between the lower limit rotating speed and the upper limit rotating speed as a rotating speed interval.
9. A readable medium comprising executable instructions which, when executed by a processor of an electronic device, cause the electronic device to perform the method of any of claims 1 to 4.
10. An electronic device comprising a processor and a memory storing execution instructions, the processor performing the method of any of claims 1-4 when the processor executes the execution instructions stored by the memory.
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