CN113094872A - Method for evaluating influence of rotating speed of cooling fan on performance of air-cooled condenser and terminal equipment - Google Patents
Method for evaluating influence of rotating speed of cooling fan on performance of air-cooled condenser and terminal equipment Download PDFInfo
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Abstract
The invention provides an evaluation method and terminal equipment for influence of the rotating speed of a cooling fan on the performance of an air-cooled condenser, wherein the method comprises the following steps: determining the influence coefficient of the rotating speed of the cooling fan on the cooling performance of the air-cooled condenser based on the average rotating speed of the cooling fan; determining the influence coefficient of the fan power on the cooling performance of the air-cooled condenser based on the fan power of each cooling fan under the operation condition; determining the performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser according to the cooling performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser and the performance influence coefficient of the power of the fan on the air-cooled condenser; and evaluating the performance of the air-cooled condenser based on the performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser. The method and the terminal for evaluating the influence of the rotating speed of the cooling fan on the performance of the air-cooling condenser can finish the quantitative evaluation of the performance of the air-cooling condenser, and further realize the accurate evaluation of the overall energy-saving effect of the air-cooling unit of the power plant.
Description
Technical Field
The invention relates to the field of thermal power generation energy conservation, in particular to a method for evaluating influence of the rotating speed of a cooling fan on the performance of an air-cooled condenser and terminal equipment.
Background
The air-cooled condenser is used as the most important heat exchanger equipment of a direct air-cooled unit of a power plant and has the important function of radiating the exhaust heat of the unit to the external environment. Along with the development of the power unit to high capacity and high parameter, the working performance of the air cooling condenser in the power plant has more and more great influence on the comprehensive efficiency of the power plant. Taking a steam turbine of a 600MW direct air cooling unit as an example, the power generation coal consumption of a power plant is directly increased by about 1 g/kW.h when the pressure of an air cooling condenser is increased by 1 kPa.
However, the rotating speed of the cooling fan of the air-cooling condenser is used as a parameter for adjusting the performance of the air-cooling condenser, and the influence of the rotating speed on the performance of the air-cooling condenser cannot be quantitatively evaluated, so that the evaluation of the energy-saving effect of a worker on the whole air-cooling unit of the power plant is influenced.
Disclosure of Invention
The embodiment of the invention provides an evaluation method and terminal equipment for influence of the rotating speed of a cooling fan on the performance of an air-cooled condenser, and aims to solve the problem that in the prior art, the performance of the air-cooled condenser cannot be quantitatively evaluated, so that workers cannot more accurately evaluate the overall energy-saving effect of an air-cooled unit of a power plant.
In order to solve the above problem, a first aspect of an embodiment of the present invention provides a method for evaluating an influence of a rotational speed of a cooling fan on performance of an air-cooled condenser, where the method for evaluating an influence of a rotational speed of a cooling fan on performance of an air-cooled condenser includes:
acquiring the running rotating speed of each cooling fan, determining the average rotating speed of the cooling fans, and determining the influence coefficient of the rotating speed of the cooling fans on the cooling performance of the air-cooled condenser based on the average rotating speed of the cooling fans;
acquiring fan power of each cooling fan under the operation condition, and determining the influence coefficient of the fan power on the cooling performance of the air-cooled condenser based on the fan power of each cooling fan under the operation condition;
acquiring the exhaust steam flow of the air-cooled condenser under the operation condition, and determining the performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser according to the exhaust steam flow of the air-cooled condenser under the operation condition, the cooling performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser and the performance influence coefficient of the power of the fan on the air-cooled condenser;
and evaluating the performance of the air-cooled condenser based on the performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser.
A second aspect of the embodiments of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the method for evaluating the influence of the rotation speed of the cooling fan on the performance of the air-cooled condenser, as provided by the first aspect of the embodiments of the present invention.
The method for evaluating the influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser, provided by the embodiment of the invention, has the beneficial effects that: firstly, determining the influence coefficient of the rotating speed of each cooling fan on the cooling performance of the air-cooled condenser based on the operating rotating speed of each cooling fan of the air-cooled condenser, and determining the influence coefficient of the fan power on the cooling performance of the air-cooled condenser based on the fan power of each cooling fan of the air-cooled condenser under the operating condition; secondly, determining the performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser based on the exhaust steam flow of the air-cooled condenser under the operation condition, the influence coefficient of the rotating speed of the cooling fan on the cooling performance of the air-cooled condenser and the performance influence coefficient of the power of the fan on the air-cooled condenser; in other words, the invention can complete the quantitative evaluation of the performance of the air-cooled condenser through the performance influence coefficient of the air-cooled condenser, thereby realizing the accurate evaluation of the overall energy-saving effect of the air-cooled unit of the power plant.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic flow chart of a method for evaluating an influence of a rotational speed of a cooling fan on performance of an air-cooled condenser according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for evaluating an influence of a rotational speed of a cooling fan on performance of an air-cooled condenser according to an embodiment of the present invention, where the method includes:
s101: the method comprises the steps of obtaining the running rotating speed of each cooling fan of the air-cooled condenser, determining the average rotating speed of the cooling fan, and determining the influence coefficient of the rotating speed of the cooling fan on the cooling performance of the air-cooled condenser based on the average rotating speed of the cooling fan.
In this embodiment, the method for calculating the average rotation speed of the cooling fan includes:
wherein f isTAverage rotational speed of cooling fan, fTiAnd N is the number of the cooling fans for the running rotating speed of each cooling fan.
S102: and acquiring the fan power of each cooling fan under the operation condition, and determining the influence coefficient of the fan power on the cooling performance of the air-cooled condenser based on the fan power of each cooling fan under the operation condition.
S103: acquiring the exhaust flow of the air-cooled condenser under the operation condition, and determining the performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser according to the exhaust flow of the air-cooled condenser under the operation condition, the cooling performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser and the performance influence coefficient of the power of the fan on the air-cooled condenser.
S104: and evaluating the performance of the air-cooled condenser based on the performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser.
In this embodiment, the coefficient of performance influence of the rotational speed of the cooling fan on the air-cooled condenser is positively correlated with the performance of the air-cooled condenser, and the larger the coefficient of performance influence of the rotational speed of the cooling fan on the air-cooled condenser is, the better the performance of the air-cooled condenser is.
Optionally, as a specific implementation manner of the method for evaluating the influence of the rotational speed of the cooling fan on the performance of the air-cooled condenser provided by the embodiment of the present invention, the method for calculating the influence coefficient of the rotational speed of the cooling fan on the cooling performance of the air-cooled condenser is as follows:
wherein ξfFor the influence coefficient of the rotating speed of the cooling fan on the cooling performance of the air-cooled condenser, fTAverage rotational speed of cooling fan, fGThe rated rotation speed of the cooling fan is shown as gamma, and the characteristic coefficient of the air-cooled condenser is shown as gamma，NTUGThe number of heat exchange units m of the air-cooled condenser under rated working conditionkThe characteristic index of the air-cooled condenser under the operation condition is shown.
In the present embodiment, mkThe air cooling condenser can be preset according to the actual working state of the air cooling condenser. Optionally, mkMay be 0.45.
Optionally, as a specific implementation manner of the method for evaluating the influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser provided by the embodiment of the present invention, before determining the influence coefficient of the fan power on the cooling performance of the air-cooled condenser based on the fan power of each cooling fan under the operating condition, a process of correcting the fan power of the air-cooled condenser is further included.
The correction process of the fan power of the air cooling condenser comprises the following steps:
and determining the fan power of the air-cooled condenser under the operation condition based on the fan power of each cooling fan of the air-cooled condenser under the operation condition.
And determining the fan power of each cooling fan at the rated rotating speed based on the operating rotating speed of each cooling fan, the fan power of the air-cooled condenser under the operating condition and the rated rotating speed of the cooling fan.
And determining the fan power of the cooling fan at the average rotating speed based on the fan power of the air-cooled condenser at the rated rotating speed.
The method comprises the steps of obtaining an ambient pressure value of the air-cooling condenser under an operation condition and an ambient temperature of the air-cooling condenser under the operation condition, correcting the fan power of the air-cooling condenser under the operation condition based on the ambient pressure value of the air-cooling condenser under the operation condition, the ambient temperature of the air-cooling condenser under the operation condition and the fan power of the air-cooling condenser under an average rotating speed, and determining the corrected fan power of the air-cooling condenser.
Optionally, as a specific implementation manner of the method for evaluating the influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser provided by the embodiment of the present invention, the method for calculating the fan power of each cooling fan at the rated rotating speed is as follows:
wherein, PGiFor the fan power, P, of each cooling fan at nominal speedTIs the fan power of the air-cooled condenser under the operating condition, fTiFor the operating speed of the respective cooling fan, fGThe rated rotating speed of each cooling fan is shown, N is the number of the cooling fans, and N is the characteristic index of the air-cooled condenser under the rated working condition.
In the present embodiment, n is determined by the rated parameter of the air-cooled condenser. Alternatively, n may be 0.33.
The method for calculating the fan power of the air-cooled condenser at the average rotating speed comprises the following steps:
wherein, P'TThe fan power of the air-cooled condenser at the average rotating speed fGFor rated speed of cooling fan, fTN is the characteristic index of the air-cooled condenser under the rated working condition, PGiAnd N is the number of the cooling fans for the rated power of each cooling fan.
Optionally, as a specific implementation manner of the method for evaluating the influence of the rotational speed of the cooling fan on the performance of the air-cooled condenser provided by the embodiment of the present invention, the method for calculating the fan power after the air-cooled condenser is corrected includes:
wherein, PLVCorrected fan power, p, for an air-cooled condenserLGIs the ambient pressure value p of the air-cooled condenser under the rated working conditionLIs the ambient pressure value t of the air-cooled condenser under the operating conditionL1Is the ambient temperature t of the air-cooled condenser under the operating conditionL1GFor rings of air-cooled condensers under nominal conditionsAmbient temperature, fGFor rated speed of cooling fan, fTN is the characteristic index of the air-cooled condenser under rated working condition, P'TThe fan power of the air-cooled condenser at the average rotating speed is shown.
Optionally, as a specific implementation manner of the method for evaluating the influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser provided by the embodiment of the present invention, a method for calculating a coefficient of influence of the fan power on the cooling performance of the air-cooled condenser is provided;
wherein ξfpThe coefficient of influence of fan power on the cooling performance of the air-cooled condenser, PLVCorrected fan power for air-cooled condenser, PLGIs the rated power of the fan of the air-cooled condenser, wherein gamma is the characteristic coefficient of the air-cooled condenser, fGFor rated speed of cooling fan, fTAverage rotational speed of cooling fan, mkThe characteristic index of the air-cooled condenser under the operation condition is shown, and n is the characteristic index of the air-cooled condenser under the rated condition.
Optionally, as a specific implementation manner of the method for evaluating the influence of the rotation speed of the cooling fan on the performance of the air-cooled condenser provided by the embodiment of the present invention, before determining the coefficient of influence of the rotation speed of the cooling fan on the performance of the air-cooled condenser based on the exhaust flow of the air-cooled condenser under the operating condition, the coefficient of influence of the rotation speed of the cooling fan on the cooling performance of the air-cooled condenser, and the coefficient of influence of the power of the fan on the performance of the air-cooled condenser, a correction process for the exhaust flow of the air-cooled condenser is further included.
The correction process of the exhaust steam flow of the air-cooling condenser comprises the following steps:
and acquiring the exhaust steam flow of the air-cooled condenser under the operation condition.
And correcting the exhaust flow of the air-cooled condenser under the operating condition based on the influence coefficient of the rotating speed of the cooling fan on the cooling performance of the air-cooled condenser and the influence coefficient of the power of the fan on the cooling performance of the air-cooled condenser, and determining the corrected exhaust flow of the air-cooled condenser.
The method for calculating the corrected exhaust steam flow of the air-cooled condenser comprises the following steps:
F′sT＝FsT×ξf×ξfp
wherein, FsT' is the corrected exhaust flow of the air-cooled condenser, FsTIs the exhaust flow of the air-cooled condenser under the operating conditionfThe influence coefficient of the rotating speed of the cooling fan on the cooling performance of the air-cooled condenser is xifpThe influence coefficient of the fan power on the cooling performance of the air-cooled condenser is shown.
Optionally, as a specific implementation manner of the method for evaluating the influence of the rotation speed of the cooling fan on the performance of the air-cooled condenser provided by the embodiment of the present invention, determining the performance influence coefficient of the rotation speed of the cooling fan on the air-cooled condenser based on the cooling performance influence coefficient of the rotation speed of the cooling fan on the air-cooled condenser and the performance influence coefficient of the fan power on the air-cooled condenser includes:
and acquiring the ambient temperature and the first air-cooling condenser pressure value of the air-cooling condenser under the operating condition.
And the first air-cooling condenser pressure value is the pressure value of the air-cooling condenser under the operation working condition.
And determining a first exhaust flow corresponding to the ambient temperature and the first air-cooling condenser pressure value based on the ambient temperature, the first air-cooling condenser pressure value and a preset air-cooling condenser performance curve.
And determining a second exhaust flow based on the first exhaust flow and the exhaust flow corrected by the air-cooled condenser, and determining a second air-cooled condenser pressure value according to the second exhaust flow, the ambient temperature and a preset air-cooled condenser performance curve.
And determining the performance influence coefficient of the rotating speed of the cooling fan on the pressure value of the air-cooled condenser based on the average rotating speed of the cooling fan, the rated rotating speed of the cooling fan, the pressure value of the first air-cooled condenser and the pressure value of the second air-cooled condenser.
The method for determining the second exhaust steam flow comprises the following steps:
FsC＝FsD 2/FsT′
wherein, FsCFor the second exhaust flow rate, FsDIs the first exhaust flow rate, FsT' is the corrected exhaust steam flow of the air cooling condenser.
In this embodiment, according to the ambient temperature and the second exhaust steam flow of the air-cooling condenser under the operating condition, a preset air-cooling condenser performance curve is queried to obtain a second air-cooling condenser pressure value.
In this embodiment, a preset air-cooling condenser performance curve is queried according to the ambient temperature of the air-cooling condenser under the operating condition and the first air-cooling condenser pressure value to obtain a first exhaust steam flow rate.
Optionally, as a specific implementation manner of the method for evaluating the influence of the rotational speed of the cooling fan on the performance of the air-cooled condenser provided by the embodiment of the present invention, the method for calculating the coefficient of influence of the rotational speed of the cooling fan on the performance of the air-cooled condenser is as follows:
wherein, lambda is the coefficient of influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser, and ps1Is the pressure value of the first air-cooled condenser, ps2Is the pressure value of the second air-cooled condenser, fGFor rated speed of cooling fan, fTIs the average rotational speed of the cooling fan.
Referring to fig. 2, fig. 2 is a schematic block diagram of a terminal device according to an embodiment of the present invention. The terminal device 200 in the present embodiment as shown in fig. 2 may include: one or more processors 201, one or more input devices 202, one or more output devices 203, and one or more memories 204. The processor 201, the input device 202, the output device 203 and the memory 204 are communicated with each other through a communication bus 205. The memory 204 is used to store a computer program comprising program instructions. The processor 201 is operable to execute program instructions stored by the memory 204. The processor 201 is configured to call a program instruction to execute steps of the performance evaluation method of the air-cooling condenser according to the above embodiment of the present invention, such as steps S101 to S104 shown in fig. 1.
It should be understood that, in the embodiment of the present invention, the Processor 201 may be a Central Processing Unit (CPU), and the Processor may also be other general processors, 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, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The input device 202 may include a touch pad, a fingerprint sensor (for collecting fingerprint information of a user and direction information of the fingerprint), a microphone, etc., and the output device 203 may include a display (LCD, etc.), a speaker, etc.
The memory 204 may include both read-only memory and random access memory and provides instructions and data to the processor 201. A portion of memory 204 may also include non-volatile random access memory. For example, memory 204 may also store device type information.
In a specific implementation, the processor 201, the input device 202, and the output device 203 described in this embodiment of the present invention may execute the implementation manners described in the first embodiment and the second embodiment of the power market health degree evaluation method provided in this embodiment of the present invention, and may also execute the implementation manners of the terminal described in this embodiment of the present invention, which is not described herein again.
In another embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored, where the computer program includes program instructions, and the program instructions, when executed by a processor, implement all or part of the processes in the method of the above embodiments, and may also be implemented by a computer program instructing associated hardware, and the computer program may be stored in a computer-readable storage medium, and the computer program, when executed by a processor, may implement the steps of the above methods embodiments. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may include any suitable increase or decrease as required by legislation and patent practice in the jurisdiction, for example, in some jurisdictions, computer readable media may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The computer readable storage medium may be an internal storage unit of the terminal of any of the foregoing embodiments, for example, a hard disk or a memory of the terminal. The computer readable storage medium may also be an external storage device of the terminal, such as a plug-in hard disk provided on the terminal, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the terminal. The computer-readable storage medium is used for storing a computer program and other programs and data required by the terminal. The computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the terminal and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed terminal and method can be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces or units, and may also be an electrical, mechanical or other form of connection.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The method for evaluating the influence of the rotating speed of a cooling fan on the performance of an air-cooled condenser is characterized by comprising the following steps of:
acquiring the running rotating speed of each cooling fan, determining the average rotating speed of the cooling fans, and determining the influence coefficient of the rotating speed of the cooling fans on the cooling performance of the air-cooled condenser based on the average rotating speed of the cooling fans;
acquiring fan power of each cooling fan under the operation condition, and determining the influence coefficient of the fan power on the cooling performance of the air-cooled condenser based on the fan power of each cooling fan under the operation condition;
acquiring the exhaust steam flow of the air-cooled condenser under the operation condition, and determining the performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser according to the exhaust steam flow of the air-cooled condenser under the operation condition, the cooling performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser and the performance influence coefficient of the power of the fan on the air-cooled condenser;
and evaluating the performance of the air-cooled condenser based on the performance influence coefficient of the rotating speed of the cooling fan on the air-cooled condenser.
2. The method for evaluating the influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser according to claim 1, wherein the method for calculating the influence coefficient of the rotating speed of the cooling fan on the cooling performance of the air-cooled condenser comprises the following steps:
wherein ξfThe influence coefficient f of the rotating speed of the cooling fan on the cooling performance of the air-cooled condenserTIs that it isAverage rotational speed of cooling fan, fGThe rated rotation speed of the cooling fan is shown, gamma is the characteristic coefficient of the air-cooled condenser, and NTUGThe number of heat exchange units m of the air-cooled condenser under rated working conditionkAnd the characteristic index of the air-cooled condenser under the operation condition is shown.
3. The method according to claim 1, further comprising a process of correcting the fan power of the air-cooled condenser before determining the coefficient of influence of the fan power on the cooling performance of the air-cooled condenser based on the fan power of each cooling fan under the operating condition;
the correction process of the fan power of the air-cooling condenser comprises the following steps:
determining the fan power of the air-cooled condenser under the operation condition based on the fan power of each cooling fan of the air-cooled condenser under the operation condition;
determining the fan power of each cooling fan at the rated rotation speed based on the operation rotation speed of each cooling fan, the fan power of the air-cooled condenser under the operation condition and the rated rotation speed of the cooling fan, and determining the fan power of the cooling fan at the average rotation speed according to the fan power of the air-cooled condenser at the rated rotation speed;
the method comprises the steps of obtaining an ambient pressure value of the air-cooling condenser under an operation condition and an ambient temperature of the air-cooling condenser under the operation condition, and correcting the fan power of the air-cooling condenser under the operation condition based on the ambient pressure value of the air-cooling condenser under the operation condition, the ambient temperature of the air-cooling condenser under the operation condition and the fan power of the air-cooling condenser under the average rotating speed to obtain the corrected fan power of the air-cooling condenser.
4. The method for evaluating the influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser according to claim 3, wherein the method for calculating the fan power of each cooling fan at the rated rotating speed comprises the following steps:
wherein, PGiFor the fan power, P, of the individual cooling fans at the nominal rotational speedTFor the fan power, f, of the air-cooled condenser under operating conditionsTiFor the operating speed of the respective cooling fan, fGThe rated rotating speed of each cooling fan is defined, N is the number of the cooling fans, and N is the characteristic index of the air-cooled condenser under the rated working condition;
the method for calculating the fan power of the air-cooled condenser at the average rotating speed comprises the following steps:
wherein, PT' Fan Power of the air-cooled condenser at average rotational speed, fGIs the rated speed, f, of the cooling fanTIs the average rotating speed of the cooling fan, n is the characteristic index of the air-cooled condenser under the rated working condition, PGiAnd N is the rated power of each cooling fan, and the number of the cooling fans is N.
5. The method for evaluating the influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser according to claim 3, wherein the method for calculating the corrected fan power of the air-cooled condenser comprises the following steps:
wherein, PLVFor the corrected fan power, p, of the air-cooled condenserLGFor the ambient pressure value, p, of the air-cooled condenser under rated working conditionsLFor the ambient pressure value, t, of the air-cooled condenser under the operating conditionL1Is the ambient temperature, t, of the air-cooled condenser under rated working conditionL1GFor the ambient temperature, f, of the air-cooled condenser under operating conditionsGIs the rated speed, f, of the cooling fanTIs the average rotating speed of the cooling fan, n is the characteristic index of the air-cooled condenser under the rated working condition, PT' is the fan power of the air-cooled condenser at the average rotating speed.
6. The method for evaluating the influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser according to claim 3, wherein the influence coefficient of the fan power on the cooling performance of the air-cooled condenser is calculated by;
wherein ξfpIs the coefficient of influence of the fan power on the cooling performance of the air-cooled condenser performance, PLVFor the corrected fan power, P, of the air-cooled condenserLGIs the rated power of the fan of the air-cooled condenser, gamma is the characteristic coefficient of the air-cooled condenser, fGIs the rated speed, f, of the cooling fanTIs the average rotational speed of the cooling fan, mkThe characteristic index of the air-cooled condenser under the operation working condition is shown in the specification, and n is the characteristic index of the air-cooled condenser under the rated working condition.
7. The method according to claim 1, further comprising a correction process for the performance impact of the cooling fan speed on the air-cooled condenser before determining the performance impact of the cooling fan speed on the air-cooled condenser based on the exhaust flow of the air-cooled condenser under operating conditions, the impact of the cooling fan speed on the cooling performance of the air-cooled condenser, and the impact of the fan power on the performance of the air-cooled condenser;
the correction process of the exhaust steam flow of the air-cooling condenser comprises the following steps:
correcting the exhaust flow of the air-cooled condenser under the operation working condition based on the influence coefficient of the rotating speed of the cooling fan on the cooling performance of the air-cooled condenser and the influence coefficient of the power of the fan on the cooling performance of the air-cooled condenser to obtain the corrected exhaust flow of the air-cooled condenser;
the method for calculating the corrected exhaust steam flow of the air-cooled condenser comprises the following steps:
FsT′＝FsT×ξf×ξfp
wherein, FsT' is the corrected exhaust flow rate of the air-cooled condenser, FsTThe discharge flow and xi of the air-cooled condenser under the operating conditionfThe influence coefficient, xi, of the rotating speed of the cooling fan on the cooling performance of the air-cooled condenserfpAnd the influence coefficient of the fan power on the cooling performance of the air-cooled condenser is shown.
8. The method of claim 7, wherein determining the performance impact of the cooling fan speed on the air-cooled condenser based on the cooling fan speed impact on the air-cooled condenser performance and the fan power impact on the air-cooled condenser performance comprises:
acquiring the ambient temperature and a first air-cooling condenser pressure value of the air-cooling condenser under the operating condition; the pressure value of the first air-cooling condenser is the pressure value of the air-cooling condenser under the operation working condition;
determining a first exhaust flow corresponding to the ambient temperature and the first air-cooling condenser pressure value based on the ambient temperature, the first air-cooling condenser pressure value and a preset air-cooling condenser performance curve;
determining a second exhaust flow based on the first exhaust flow and the exhaust flow corrected by the air-cooled condenser, and determining a second air-cooled condenser pressure value according to the second exhaust flow, the ambient temperature and a preset air-cooled condenser performance curve;
determining a performance influence coefficient of the rotating speed of the cooling fan on the pressure value of the air-cooled condenser based on the average rotating speed of the cooling fan, the rated rotating speed of the cooling fan, the first air-cooled condenser pressure value and the second air-cooled condenser pressure value;
the second exhaust steam flow calculation method comprises the following steps:
FsC＝FsD 2/FsT′
wherein, FsCFor the second exhaust flow rate, FsDIs the first exhaust flow rate, FsT' is the corrected exhaust steam flow of the air-cooling condenser.
9. The method for evaluating the influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser according to claim 8, wherein the method for calculating the influence coefficient of the rotating speed of the cooling fan on the performance of the air-cooled condenser comprises the following steps:
wherein lambda is the coefficient of influence of the rotating speed of the cooling fan on the performance of the air-cooled condenser, ps1Is the pressure value, p, of the first air-cooled condensers2Is the pressure value f of the second air-cooled condenserGIs the rated speed, f, of the cooling fanTIs the average rotational speed of the cooling fan.
10. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 9 when executing the computer program.
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| CN111503036A (en) * | 2019-01-30 | 2020-08-07 | 新奥数能科技有限公司 | Performance optimization method and device of air cooling unit, readable medium and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111503036A (en) * | 2019-01-30 | 2020-08-07 | 新奥数能科技有限公司 | Performance optimization method and device of air cooling unit, readable medium and electronic equipment |
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| HAISHENG WANG: "A New Correction Method of the Fan Speed for Air-Cooled Condenser Performance Test", 《2016 INTERNATIONAL CONFERENCE ON SMART GRID AND CLEAN ENERGY TECHNOLOGIES》 * |
| 杨海生: "直接空冷机组空冷岛运行优化的研究", 《中国优秀博硕士学位论文全文数据库(硕士) 工程科技II辑》 * |
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Application publication date: 20210709 |