CN112432307A - Water pump evaluation method and device, air conditioning system, storage medium and electronic equipment - Google Patents
Water pump evaluation method and device, air conditioning system, storage medium and electronic equipment Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 382
- 238000011156 evaluation Methods 0.000 title claims abstract description 97
- 238000004378 air conditioning Methods 0.000 title claims abstract description 22
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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Abstract
The invention discloses a water pump evaluation method and device, an air conditioning system, a storage medium and electronic equipment. Wherein, the method comprises the following steps: acquiring a temperature difference reference value of a temperature difference between supplied water and returned water and a frequency reference value of the operating frequency of a water pump according to historical operating data of a water circulating system, wherein the water circulating system comprises a water supply pipeline, a water return pipeline and the water pump; and generating an evaluation result of the running rationality of the water pump according to the temperature difference reference value and the frequency reference value. According to the invention, the temperature difference reference value and the frequency reference value capable of reflecting the historical operating condition of the water pump are obtained by processing the historical operating data, the rationality of the operation of the water pump is evaluated based on the temperature difference reference value and the frequency reference value, the rationality of the operation control of the water pump is effectively evaluated and diagnosed, the operation maintenance personnel or a cloud platform can conveniently and intelligently regulate the frequency of the water pump, the efficient operation of the water pump is realized, and the technical reserve is intelligently increased for realizing a large-scale commercial energy station.
Description
Technical Field
The invention relates to the technical field of units, in particular to a water pump evaluation method and device, an air conditioning system, a storage medium and electronic equipment.
Background
With the maturity and development of the market of large-scale commercial centralized air conditioners, high-level functions such as one-key start-stop, unattended operation, automatic diagnosis and analysis become standard configurations of project development gradually, and especially with the development of big data analysis and artificial intelligence, cases of intelligent diagnosis and energy consumption statistical analysis adopted in large-scale commercial air conditioner systems are more and more. However, for a water pump in an air conditioning system, it is not currently possible to effectively evaluate and diagnose the rationality of the operation control of the water pump.
Disclosure of Invention
The embodiment of the invention provides a water pump evaluation method and device, an air conditioning system, a storage medium and electronic equipment, and at least solves the problem that the rationality of water pump operation control cannot be effectively evaluated and diagnosed in the prior art.
In order to solve the technical problem, an embodiment of the present invention provides a water pump evaluation method, including:
acquiring a temperature difference reference value of a temperature difference between supplied water and returned water and a frequency reference value of the operating frequency of a water pump according to historical operating data of a water circulating system, wherein the water circulating system comprises a water supply pipeline, a water return pipeline and the water pump;
and generating an evaluation result of the running rationality of the water pump according to the temperature difference reference value and the frequency reference value.
Optionally, according to the historical operating data of the water circulation system, obtaining a temperature difference reference value of the temperature difference between the supply water and the return water and a frequency reference value of the operating frequency of the water pump, including:
determining the minimum value and the maximum value of the temperature difference between the supplied water and the returned water according to the historical operation data;
dividing the range from the minimum value to the maximum value of the temperature difference between the water supply and the water return according to a set step length to obtain at least two temperature difference intervals;
according to the historical operating data, determining a temperature difference interval with the maximum data frequency in the at least two temperature difference intervals;
and respectively calculating historical supply and return water temperature difference data and corresponding historical water pump operation frequency data in the temperature difference interval with the maximum data frequency according to a preset algorithm to obtain the temperature difference reference value and the frequency reference value.
Optionally, determining, according to the historical operating data, a temperature difference interval with the maximum data frequency among the at least two temperature difference intervals, including:
determining temperature difference intervals corresponding to all historical supply and return water temperature differences in the historical operating data;
obtaining the data frequency of each temperature difference interval according to the corresponding relation between the historical supply and return water temperature difference and the temperature difference interval;
and determining the temperature difference interval with the maximum data frequency according to the data frequency of each temperature difference interval.
Optionally, the step of calculating historical supply and return water temperature difference data and corresponding historical water pump operating frequency data in the temperature difference interval with the maximum data frequency according to a preset algorithm to obtain the temperature difference reference value and the frequency reference value includes:
calculating the average value of the historical supply and return water temperature difference data in the temperature difference interval with the maximum data frequency as the temperature difference reference value;
and calculating the average value of the historical water pump running frequency data corresponding to the historical supply and return water temperature difference data in the temperature difference interval with the maximum data frequency as the frequency reference value.
Optionally, an evaluation result of the running rationality of the water pump is generated according to the temperature difference reference value and the frequency reference value, and the evaluation result includes:
comparing the temperature difference reference value with a preset temperature difference threshold value, and comparing the frequency reference value with a preset frequency threshold value;
and generating an evaluation result of the running rationality of the water pump according to the comparison result.
Optionally, an evaluation result of the water pump operation rationality is generated according to the comparison result, and the evaluation result includes:
if the temperature difference reference value is larger than a preset maximum temperature difference and the frequency reference value is smaller than a preset maximum frequency, determining that the water flow is low according to the evaluation result, and suggesting that the running frequency of the water pump is increased;
if the temperature difference reference value is larger than the preset maximum temperature difference and the frequency reference value is larger than or equal to the preset maximum frequency, determining that the evaluation result is that the water pump normally operates;
if the temperature difference reference value is greater than or equal to a preset minimum temperature difference and less than or equal to a preset maximum temperature difference, determining that the evaluation result is that the water pump normally operates;
if the temperature difference reference value is smaller than the preset minimum temperature difference and the frequency reference value is larger than the preset minimum frequency, determining that the evaluation result is that the water flow is higher, and recommending to reduce the operating frequency of the water pump;
and if the temperature difference reference value is smaller than the preset minimum temperature difference and the frequency reference value is smaller than or equal to the preset minimum frequency, determining that the evaluation result is that the water pump normally operates.
Optionally, before obtaining a temperature difference reference value of the temperature difference between the supply water and the return water and a frequency reference value of the operating frequency of the water pump according to historical operating data of the water circulation system, the method further includes:
acquiring historical operating data of the water circulation system within preset time;
and correcting abnormal data and missing data in the acquired historical operating data.
Optionally, the water pump is a chilled water pump.
The embodiment of the invention also provides a water pump evaluation device, which comprises:
the device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring a temperature difference reference value of temperature difference of supply water and return water and a frequency reference value of operating frequency of a water pump according to historical operating data of a water circulating system, and the water circulating system comprises a water supply pipeline, a water return pipeline and the water pump;
and the generating module is used for generating an evaluation result of the running rationality of the water pump according to the temperature difference reference value and the frequency reference value.
Optionally, the first obtaining module includes:
the first determining unit is used for determining the minimum value and the maximum value of the temperature difference between the supplied water and the returned water according to the historical operating data;
the dividing unit is used for dividing the range from the minimum value to the maximum value of the temperature difference between the water supply and the water return according to a set step length to obtain at least two temperature difference intervals;
the second determining unit is used for determining a temperature difference interval with the maximum data frequency in the at least two temperature difference intervals according to the historical operating data;
and the calculation unit is used for respectively calculating the historical supply and return water temperature difference data and the corresponding historical water pump operation frequency data in the temperature difference interval with the maximum data frequency according to a preset algorithm to obtain the temperature difference reference value and the frequency reference value.
Optionally, the generating module includes:
the comparison unit is used for comparing the temperature difference reference value with a preset temperature difference threshold value and comparing the frequency reference value with a preset frequency threshold value;
and the generating unit is used for generating an evaluation result of the running rationality of the water pump according to the comparison result.
An embodiment of the present invention further provides an air conditioning system, including: the invention relates to an air conditioning unit and a water pump evaluation device.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a water pump evaluation method according to an embodiment of the present invention.
An embodiment of the present invention further provides an electronic device, including: one or more processors; a memory for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement a water pump evaluation method in accordance with an embodiment of the present invention.
By applying the technical scheme of the invention, the temperature difference reference value of the temperature difference of the supply water and the return water and the frequency reference value of the operating frequency of the water pump are obtained according to the historical operating data of the water circulation system, and the evaluation result of the operating rationality of the water pump is generated according to the temperature difference reference value and the frequency reference value. Through handling historical operating data, obtain difference in temperature reference value and the frequency reference value that can reflect the historical operating conditions of water pump, carry out the evaluation of water pump operation rationality based on difference in temperature reference value and frequency reference value, realized effectively evaluating and diagnosing the rationality of water pump operation control, make things convenient for operation maintainer or cloud platform intelligent control water pump frequency, realize the high-efficient operation of water pump, for realizing large-scale commercial energy station intellectuality increase technical reserve.
Drawings
Fig. 1 is a flowchart of a water pump evaluation method according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a water pump evaluation process provided by a second embodiment of the invention;
fig. 3 is a block diagram of a water pump evaluation apparatus according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. 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.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
Example one
The embodiment provides a water pump evaluation method, which can evaluate the running rationality of a water pump, is convenient for regulating and controlling the water pump and ensures the efficient running of the water pump. Fig. 1 is a flowchart of a water pump evaluation method according to a first embodiment of the present invention, and as shown in fig. 1, the method includes the following steps:
s101, acquiring a temperature difference reference value of a temperature difference between supplied water and returned water and a frequency reference value of a water pump operation frequency according to historical operation data of a water circulation system, wherein the water circulation system comprises a water supply pipeline, a water return pipeline and a water pump, and the water pump is used for providing power for water circulation, for example, the water circulation system can be a chilled water circulation system in an air conditioner. Preferably, the water pump in this embodiment is a chilled water pump.
And S102, generating an evaluation result of the running rationality of the water pump according to the temperature difference reference value and the frequency reference value.
Wherein the historical operating data at least comprises: water supply temperature, water return temperature and water pump operating frequency. Of course, the temperature difference between the supplied water and the returned water can also be calculated according to the water supply temperature and the returned water temperature which are collected in real time and stored as historical operation data. The embodiment can acquire the running data of the water circulation system in real time for storage, and when the water pump needs to be evaluated, the related historical running data can be acquired from the stored data and used as the basis for evaluation. Specifically, the water pump evaluation can be performed periodically, that is, the related historical operation data is acquired according to a preset period, and the operation condition of the water pump in the current period is evaluated according to the historical operation data in the current period. Compared with real-time operation data, a large amount of periodical historical operation data can reflect the operation condition of the water pump in the period, and the operation of the water pump can be accurately evaluated.
The temperature difference reference value and the frequency reference value refer to reference data which are obtained based on historical operation data and used for evaluating the operation reasonability of the water pump. The temperature difference reference value and the frequency reference value can accurately reflect the running condition of the water pump in corresponding time, so that the running rationality of the water pump can be effectively evaluated based on the temperature difference reference value and the frequency reference value. The water pump running reasonableness refers to whether the water pump runs reasonably in the past period of time.
After determining the evaluation result of the operation of the water pump according to the temperature difference reference value and the frequency reference value, the evaluation result can be output to a controller of the water circulation system, so that the controller can correct the control parameters of the water pump according to the evaluation result. Therefore, the evaluation result is utilized to ensure the efficient operation of the water pump, and the operation energy consumption of the water circulation system is further reduced.
According to the water pump evaluation method, the temperature difference reference value of the temperature difference between the supplied water and the returned water and the frequency reference value of the operating frequency of the water pump are obtained according to the historical operating data of the water circulation system, and the evaluation result of the operating rationality of the water pump is generated according to the temperature difference reference value and the frequency reference value. Through handling historical operating data, obtain difference in temperature reference value and the frequency reference value that can reflect the historical operating conditions of water pump, carry out the evaluation of water pump operation rationality based on difference in temperature reference value and frequency reference value, realized effectively evaluating and diagnosing the rationality of water pump operation control, make things convenient for operation maintainer or cloud platform intelligent control water pump frequency, realize the high-efficient operation of water pump, for realizing large-scale commercial energy station intellectuality increase technical reserve.
In one embodiment, acquiring a temperature difference reference value of the temperature difference between the supplied water and the returned water and a frequency reference value of the operating frequency of the water pump according to historical operating data of the water circulation system comprises: determining the minimum value and the maximum value of the temperature difference between the supplied water and the returned water according to the historical operation data; dividing the range from the minimum value to the maximum value of the temperature difference between the water supply and the water return according to a set step length to obtain at least two temperature difference intervals; according to the historical operating data, determining a temperature difference interval with the maximum data frequency in the at least two temperature difference intervals; and respectively calculating historical supply and return water temperature difference data and corresponding historical water pump operation frequency data in the temperature difference interval with the maximum data frequency according to a preset algorithm to obtain the temperature difference reference value and the frequency reference value.
If the historical operating data does not include the temperature difference of the water supply and the water return, the temperature difference of the water supply and the water return in the historical operating data needs to be calculated to obtain the temperature difference of the water supply and the water return, and then the minimum value and the maximum value are determined from all the calculated temperature differences of the water supply and the water return. The set step length is preset by a worker according to requirements, for example, the set step length can be set to be 2 ℃. The data frequency refers to the number of times that the temperature difference data of the historical supply and return water falls into the temperature difference interval. The temperature difference interval with the maximum data frequency shows that the corresponding temperature difference between the supplied water and the returned water is mainly concentrated in the temperature difference interval when the water pump operates, namely, the historical operating data in the temperature difference interval with the maximum data frequency can better reflect the operating condition of the water pump in the corresponding time. The preset algorithm may be an algorithm for calculating an average value or a weighted average value.
According to the embodiment, big data analysis and processing are carried out on historical operating data, the temperature difference reference value and the frequency reference value are determined based on interval division and data frequency, the temperature difference reference value and the frequency reference value can accurately reflect the historical operating condition of the water pump, and therefore guarantee is provided for accurately evaluating the water pump.
Further, according to the historical operating data, determining a temperature difference interval with the maximum data frequency in the at least two temperature difference intervals, including: determining temperature difference intervals corresponding to all historical supply and return water temperature differences in the historical operating data; obtaining the data frequency of each temperature difference interval according to the corresponding relation between the historical supply and return water temperature difference and the temperature difference interval; and determining the temperature difference interval with the maximum data frequency according to the data frequency of each temperature difference interval.
The method determines the temperature difference interval with the maximum data frequency by counting the times of the historical supply and return water temperature difference data appearing in each temperature difference interval, and is simple, reliable and easy to implement.
In an optional embodiment, respectively calculating historical supply and return water temperature difference data and corresponding historical water pump operating frequency data in the temperature difference interval with the maximum data frequency according to a preset algorithm to obtain the temperature difference reference value and the frequency reference value, including: calculating the average value of the historical supply and return water temperature difference data in the temperature difference interval with the maximum data frequency as the temperature difference reference value; and calculating the average value of the historical water pump running frequency data corresponding to the historical supply and return water temperature difference data in the temperature difference interval with the maximum data frequency as the frequency reference value.
The temperature difference reference value and the frequency reference value are obtained by calculating the average value, and the calculation mode is simple and reliable.
Illustratively, the minimum value of the temperature difference between the water supply and the water return is determined to be 2 ℃ according to historical operation data, the maximum value of the temperature difference between the water supply and the water return is determined to be 10 ℃, and the following temperature difference intervals are obtained by dividing the set step length by 2 ℃: the temperature difference interval with the maximum data frequency is the corresponding temperature difference interval with the maximum historical supply and return water temperature difference data, for example, the temperature difference interval with the maximum data frequency is (4, 6). calculating the average value of the historical supply and return water data in the temperature difference interval with the maximum data frequency as a temperature difference reference value, and calculating the average value of the historical operating frequency corresponding to the historical supply and return water temperature difference data in the temperature difference interval with the maximum data frequency as a frequency reference value.
In one embodiment, generating an evaluation result of the rationality of the operation of the water pump according to the temperature difference reference value and the frequency reference value comprises: comparing the temperature difference reference value with a preset temperature difference threshold value, and comparing the frequency reference value with a preset frequency threshold value; and generating an evaluation result of the running rationality of the water pump according to the comparison result.
The preset temperature difference threshold is an expected supply and return water temperature difference of the water circulation system under a design working condition, for example, an expected temperature difference range can be set, namely the preset temperature difference threshold comprises a minimum temperature difference and a maximum temperature difference. The preset frequency threshold is an allowable operating frequency of the water pump under a design condition, and the allowable operating frequency of the water pump may be a frequency range, that is, the preset frequency threshold may include a minimum frequency and a maximum frequency.
This embodiment can know the difference of water pump historical behavior and expectation situation through difference in temperature reference value and preset difference in temperature threshold value, through comparison frequency reference value and preset frequency threshold value, can know whether the water pump can also carry out operating frequency's adjustment to obtain the evaluation result of water pump operation rationality based on the comparative result, as the basis of revising water pump control parameter, guarantee the high-efficient operation of water pump.
Further, an evaluation result of the water pump operation rationality is generated according to the comparison result, and the evaluation result comprises the following conditions:
(1) and if the temperature difference reference value is greater than the preset maximum temperature difference and the frequency reference value is less than the preset maximum frequency, determining that the water flow is low according to the evaluation result, and suggesting that the operating frequency of the water pump is increased.
The temperature difference reference value is larger than the preset maximum temperature difference, which indicates that the temperature difference between the supplied water and the returned water is too large, namely the water flow is low, and the operation frequency of the water pump needs to be increased to increase the water flow. The frequency reference value is smaller than the preset maximum frequency, which indicates that the operating frequency of the water pump can be increased within an allowable range, so that the evaluation result in this case is that the water flow is low, and the operating frequency of the water pump is recommended to be increased.
(2) And if the temperature difference reference value is greater than the preset maximum temperature difference and the frequency reference value is greater than or equal to the preset maximum frequency, determining that the evaluation result is that the water pump normally operates.
The temperature difference reference value is larger than the preset maximum temperature difference, which indicates that the temperature difference between the supplied water and the returned water is too large, namely the water flow is low, and the operation frequency of the water pump needs to be increased to increase the water flow. However, the frequency reference value is greater than or equal to the preset maximum frequency, which indicates that the water pump cannot be raised in frequency, and therefore, the evaluation result in this case is that the water pump normally operates.
(3) And if the temperature difference reference value is greater than or equal to a preset minimum temperature difference and less than or equal to a preset maximum temperature difference, indicating that the temperature difference of the supplied and returned water is in an expected range, determining that the evaluation result is that the water pump normally operates.
(4) If the temperature difference reference value is smaller than the preset minimum temperature difference and the frequency reference value is larger than the preset minimum frequency, determining that the evaluation result is that the water flow is higher, and recommending to reduce the operating frequency of the water pump;
the temperature difference reference value is smaller than the preset minimum temperature difference, which indicates that the temperature difference of the supplied water and the returned water is too small, namely the water flow is higher, and the operation frequency of the water pump needs to be reduced to reduce the water flow. The frequency reference value is larger than the preset minimum frequency, which indicates that the operating frequency of the water pump can be reduced within an allowable range, so that the evaluation result in the case of the frequency reference value is that the water flow is higher, and the operating frequency of the water pump is recommended to be reduced.
(5) And if the temperature difference reference value is smaller than the preset minimum temperature difference and the frequency reference value is smaller than or equal to the preset minimum frequency, determining that the evaluation result is that the water pump normally operates.
The temperature difference reference value is smaller than the preset minimum temperature difference, which indicates that the temperature difference of the supplied water and the returned water is too small, namely the water flow is higher, and the operation frequency of the water pump needs to be reduced to reduce the water flow. However, the frequency reference value is less than or equal to the preset minimum frequency, which indicates that the water pump cannot reduce the frequency, and therefore, the evaluation result in this case is that the water pump normally operates.
The embodiment combines a specific comparison result to give an evaluation result of the running rationality of the water pump, provides a basis for correcting the control parameters of the water pump, and ensures the efficient running of the water pump.
In view of the fact that the collected operation data may be abnormal or missing, this embodiment further provides an implementation manner of correcting the abnormal data and the missing data, and specifically, before obtaining the temperature difference reference value of the temperature difference between the supplied water and the returned water and the frequency reference value of the operation frequency of the water pump according to the historical operation data of the water circulation system, the implementation manner further includes: acquiring historical operating data of the water circulation system within preset time; and correcting abnormal data and missing data in the acquired historical operating data.
The preset time is determined according to the evaluation period requirement, for example, if the evaluation is performed every 5 days, the preset time can be set to 5 days. The operation parameters of each device have a normal range, and whether the data are abnormal or not can be judged according to whether the measured value exceeds the normal range or not; in the data acquisition process, individual data cannot be acquired due to instability of communication signals, namely, the data is absent. The abnormal data and the missing data can be covered by the data before and after the abnormal data and the missing data, so that the purpose of correcting historical operating data is achieved.
According to the embodiment, before the water pump operation rationality evaluation is carried out by using the historical operation data, the abnormal data and the missing data are corrected, so that the referential property of the historical operation data is ensured, and the accuracy and the reliability of the evaluation are ensured.
Example two
The above-mentioned water pump evaluation method is described below with reference to a specific embodiment, however, it should be noted that this specific embodiment is only for better describing the present application and should not be construed as a limitation to the present application. The same or corresponding terms as those of the above-described embodiments are explained, and the description of the present embodiment is omitted.
The present embodiment will be described by taking a chilled water pump of an air conditioner as an example. The water pump evaluation of the present embodiment includes the following sections: data acquisition, big data analysis and diagnostic evaluation.
Data acquisition: parameters such as the water supply temperature of the freezing main pipe, the water return temperature of the freezing main pipe, the running frequency of the freezing water pump and the like are transmitted in real time through the DDC controller, and historical running data are collected and stored through upper computer software or cloud platform monitoring software.
The big data analysis comprises the following steps:
1. data processing: the historical operating data is processed by means of big data analysis, abnormal data is corrected, missing data is perfected, for example, the abnormal data and the missing data can be covered by adjacent data, and correction and perfection of the data are achieved.
2. Calculating the maximum value and the minimum value of the temperature difference between the supply water and the return water of the freezing main pipe in historical operation data;
3. dividing the whole numerical range from the minimum value to the maximum value of the temperature difference between the water supply and return of the freezing main pipe into N different temperature difference value range segments (which are equivalent to the temperature difference interval in the first embodiment) according to a set step length;
4. and calculating the data quantity (or frequency) of different temperature difference value range segments for all historical operating data, and determining the temperature difference value range segment with the maximum data frequency.
5. Calculating the average value of the temperature difference between the supply water and the return water of the freezing main pipe and the average value of the running frequency of the freezing water pump in all historical data under the temperature difference value range segment with the maximum data frequency, wherein the average values are respectively as follows: mean value delta t of temperature difference between water supply and return of freezing main pipe and mean frequency f of freezing water pumpave。
The specific steps of the diagnostic evaluation (refer to steps S205 to S211) will be described with reference to fig. 2. Referring to fig. 2, the water pump evaluation method includes the steps of:
and S201, acquiring real-time operation data of the central air-conditioning system.
And S202, periodically summarizing the real-time operation data of the central air-conditioning system.
And S203, storing the operation data of the freezing side of the central air-conditioning system as historical operation data to be used as a basis for evaluating the freezing water pump.
S204, performing big data analysis, and calculating to obtain the average value delta t of the temperature difference between the supply water and the return water of the freezing main pipe and the average frequency f of the freezing water pumpave。
S205, determine whether Δ t > Δ tmax[ design value]If yes, the process proceeds to step S206, and if no, the process proceeds to step S207. Δ tmax[ design value]The maximum temperature difference of the supply water and the return water of the freezing main pipe under the design working condition is realized.
S206, judging whether f isave＜fmax[ design value]If yes, the process proceeds to step S209, and if no, the process proceeds to step S210. f. ofmax[ design value]The maximum operation frequency allowed by the chilled water pump under the design working condition is adopted.
S207, judging whether delta t is less than delta tmin[ design value]Otherwise, the process proceeds to step S210, and if so, the process proceeds to step S208. Δ tmin[ design value]The minimum temperature difference of the supply water and the return water of the freezing main pipe under the design working condition is provided.
S208, judging whether f isave＞fmin[ design value]If yes, the process proceeds to step S211, and if no, the process proceeds to step S210. f. ofmin[ design value]The minimum operation frequency allowed by the chilled water pump under the design working condition.
S209, outputting an evaluation result that the flow of the chilled water is low and the frequency of the chilled water pump is recommended to be improved.
And S210, outputting an evaluation result of normal operation of the chilled water pump.
S211, outputting an evaluation result that the flow rate of the chilled water is higher and the frequency of the chilled water pump is recommended to be reduced.
The embodiment provides a self-diagnosis method for evaluating the rationality of variable flow control operation of the chilled water pump during variable flow operation according to actual engineering experience, the method can be applied to upper computer software or cloud platform software of a large-scale commercial air conditioning system, can provide intelligent expert diagnosis service, and can be used as a self-diagnosis method for an efficient operation monitoring function of the air conditioning system. And (3) visually displaying the diagnosis opinions (namely evaluation results) output by the self-diagnosis method for the variable flow operation of the primary pump so as to facilitate operation and maintenance personnel to change the control strategy in time. The water pump evaluation method can be combined with the control logic of the group control system to serve as the control logic for optimizing the frequency of the chilled water pump, so that the reliable and efficient operation of the chilled water pump is ensured, and the energy-saving operation level of the air conditioning system is further improved.
EXAMPLE III
Based on the same inventive concept, the embodiment provides a water pump evaluation device, which can be used for implementing the water pump evaluation method described in the embodiment. The device can be implemented by software and/or hardware, and the device can be generally integrated in a host computer or a cloud platform.
Fig. 3 is a block diagram of a water pump evaluation apparatus according to a third embodiment of the present invention, and as shown in fig. 3, the apparatus includes:
the first obtaining module 31 is configured to obtain a temperature difference reference value of a temperature difference between supply water and return water and a frequency reference value of an operating frequency of a water pump according to historical operating data of a water circulation system, where the water circulation system includes a water supply pipeline, a water return pipeline, and a water pump;
and the generating module 32 is used for generating an evaluation result of the running rationality of the water pump according to the temperature difference reference value and the frequency reference value.
Optionally, the first obtaining module 31 includes:
the first determining unit is used for determining the minimum value and the maximum value of the temperature difference between the supplied water and the returned water according to the historical operating data;
the dividing unit is used for dividing the range from the minimum value to the maximum value of the temperature difference between the water supply and the water return according to a set step length to obtain at least two temperature difference intervals;
the second determining unit is used for determining a temperature difference interval with the maximum data frequency in the at least two temperature difference intervals according to the historical operating data;
and the calculation unit is used for respectively calculating the historical supply and return water temperature difference data and the corresponding historical water pump operation frequency data in the temperature difference interval with the maximum data frequency according to a preset algorithm to obtain the temperature difference reference value and the frequency reference value.
Optionally, the second determining unit includes:
the first determining subunit is used for determining temperature difference intervals corresponding to various historical supply and return water temperature differences in the historical operating data;
the second determining subunit is used for obtaining the data frequency of each temperature difference interval according to the corresponding relation between the historical supply and return water temperature difference and the temperature difference interval;
and the third determining subunit is used for determining the temperature difference interval with the maximum data frequency according to the data frequency of each temperature difference interval.
Optionally, the computing unit is specifically configured to:
calculating the average value of the historical supply and return water temperature difference data in the temperature difference interval with the maximum data frequency as the temperature difference reference value;
and calculating the average value of the historical water pump running frequency data corresponding to the historical supply and return water temperature difference data in the temperature difference interval with the maximum data frequency as the frequency reference value.
Optionally, the generating module 32 includes:
the comparison unit is used for comparing the temperature difference reference value with a preset temperature difference threshold value and comparing the frequency reference value with a preset frequency threshold value;
and the generating unit is used for generating an evaluation result of the running rationality of the water pump according to the comparison result.
Optionally, the generating unit is specifically configured to:
if the temperature difference reference value is larger than a preset maximum temperature difference and the frequency reference value is smaller than a preset maximum frequency, determining that the water flow is low according to the evaluation result, and suggesting that the running frequency of the water pump is increased;
if the temperature difference reference value is larger than the preset maximum temperature difference and the frequency reference value is larger than or equal to the preset maximum frequency, determining that the evaluation result is that the water pump normally operates;
if the temperature difference reference value is greater than or equal to a preset minimum temperature difference and less than or equal to a preset maximum temperature difference, determining that the evaluation result is that the water pump normally operates;
if the temperature difference reference value is smaller than the preset minimum temperature difference and the frequency reference value is larger than the preset minimum frequency, determining that the evaluation result is that the water flow is higher, and recommending to reduce the operating frequency of the water pump;
and if the temperature difference reference value is smaller than the preset minimum temperature difference and the frequency reference value is smaller than or equal to the preset minimum frequency, determining that the evaluation result is that the water pump normally operates.
Optionally, the apparatus further comprises:
the second acquisition module is used for acquiring historical operation data of the water circulation system within preset time before acquiring a temperature difference reference value of a temperature difference of supply and return water and a frequency reference value of the operation frequency of the water pump according to the historical operation data of the water circulation system;
and the correction module is used for correcting abnormal data and missing data in the acquired historical operating data.
Optionally, the water pump is a chilled water pump.
The device can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
Example four
The present embodiment provides an air conditioning system including: air conditioning unit and the water pump evaluation device of the third embodiment.
Illustratively, the water pump evaluation device can be integrated in an upper computer or a cloud platform, the upper computer or the cloud platform is in communication connection with the air conditioning unit, the upper computer or the cloud platform can obtain historical operation data of the water circulation system from the air conditioning unit, an evaluation result of the water pump operation rationality is obtained according to the method of the embodiment, the evaluation result is output to a controller of the air conditioning unit, and the controller can correct control parameters of the water pump according to the received evaluation result, so that the water pump can operate efficiently, and the operation energy consumption of the air conditioning system is further reduced.
EXAMPLE five
The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the water pump evaluation method as described in the above embodiments.
EXAMPLE six
The present embodiment provides an electronic device, including: one or more processors; a memory for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the water pump evaluation method as described in the embodiments above.
The above-described embodiments of the apparatus are merely illustrative, and the 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 modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (14)
1. A water pump evaluation method is characterized by comprising the following steps:
acquiring a temperature difference reference value of a temperature difference between supplied water and returned water and a frequency reference value of the operating frequency of a water pump according to historical operating data of a water circulating system, wherein the water circulating system comprises a water supply pipeline, a water return pipeline and the water pump;
and generating an evaluation result of the running rationality of the water pump according to the temperature difference reference value and the frequency reference value.
2. The method of claim 1, wherein obtaining a temperature difference reference value of the temperature difference between the supplied water and the returned water and a frequency reference value of the operating frequency of the water pump according to historical operating data of the water circulation system comprises:
determining the minimum value and the maximum value of the temperature difference between the supplied water and the returned water according to the historical operation data;
dividing the range from the minimum value to the maximum value of the temperature difference between the water supply and the water return according to a set step length to obtain at least two temperature difference intervals;
according to the historical operating data, determining a temperature difference interval with the maximum data frequency in the at least two temperature difference intervals;
and respectively calculating historical supply and return water temperature difference data and corresponding historical water pump operation frequency data in the temperature difference interval with the maximum data frequency according to a preset algorithm to obtain the temperature difference reference value and the frequency reference value.
3. The method of claim 2, wherein determining the temperature difference interval with the highest data frequency in the at least two temperature difference intervals according to the historical operating data comprises:
determining temperature difference intervals corresponding to all historical supply and return water temperature differences in the historical operating data;
obtaining the data frequency of each temperature difference interval according to the corresponding relation between the historical supply and return water temperature difference and the temperature difference interval;
and determining the temperature difference interval with the maximum data frequency according to the data frequency of each temperature difference interval.
4. The method according to claim 2, wherein the step of respectively calculating historical supply and return water temperature difference data and corresponding historical water pump operating frequency data in the temperature difference interval with the maximum data frequency according to a preset algorithm to obtain the temperature difference reference value and the frequency reference value comprises the following steps:
calculating the average value of the historical supply and return water temperature difference data in the temperature difference interval with the maximum data frequency as the temperature difference reference value;
and calculating the average value of the historical water pump running frequency data corresponding to the historical supply and return water temperature difference data in the temperature difference interval with the maximum data frequency as the frequency reference value.
5. The method according to claim 1, wherein generating an evaluation result of the rationality of the operation of the water pump based on the temperature difference reference value and the frequency reference value comprises:
comparing the temperature difference reference value with a preset temperature difference threshold value, and comparing the frequency reference value with a preset frequency threshold value;
and generating an evaluation result of the running rationality of the water pump according to the comparison result.
6. The method of claim 5, wherein generating an assessment of the rationality of the operation of the water pump based on the comparison comprises:
if the temperature difference reference value is larger than a preset maximum temperature difference and the frequency reference value is smaller than a preset maximum frequency, determining that the water flow is low according to the evaluation result, and suggesting that the running frequency of the water pump is increased;
if the temperature difference reference value is larger than the preset maximum temperature difference and the frequency reference value is larger than or equal to the preset maximum frequency, determining that the evaluation result is that the water pump normally operates;
if the temperature difference reference value is greater than or equal to a preset minimum temperature difference and less than or equal to a preset maximum temperature difference, determining that the evaluation result is that the water pump normally operates;
if the temperature difference reference value is smaller than the preset minimum temperature difference and the frequency reference value is larger than the preset minimum frequency, determining that the evaluation result is that the water flow is higher, and recommending to reduce the operating frequency of the water pump;
and if the temperature difference reference value is smaller than the preset minimum temperature difference and the frequency reference value is smaller than or equal to the preset minimum frequency, determining that the evaluation result is that the water pump normally operates.
7. The method of claim 1, before obtaining a temperature difference reference value of the temperature difference between the supplied water and the returned water and a frequency reference value of the operating frequency of the water pump according to historical operating data of the water circulation system, further comprising:
acquiring historical operating data of the water circulation system within preset time;
and correcting abnormal data and missing data in the acquired historical operating data.
8. The method according to any one of claims 1 to 7, wherein the water pump is a chilled water pump.
9. A water pump evaluation device, comprising:
the device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring a temperature difference reference value of temperature difference of supply water and return water and a frequency reference value of operating frequency of a water pump according to historical operating data of a water circulating system, and the water circulating system comprises a water supply pipeline, a water return pipeline and the water pump;
and the generating module is used for generating an evaluation result of the running rationality of the water pump according to the temperature difference reference value and the frequency reference value.
10. The apparatus of claim 9, wherein the first obtaining module comprises:
the first determining unit is used for determining the minimum value and the maximum value of the temperature difference between the supplied water and the returned water according to the historical operating data;
the dividing unit is used for dividing the range from the minimum value to the maximum value of the temperature difference between the water supply and the water return according to a set step length to obtain at least two temperature difference intervals;
the second determining unit is used for determining a temperature difference interval with the maximum data frequency in the at least two temperature difference intervals according to the historical operating data;
and the calculation unit is used for respectively calculating the historical supply and return water temperature difference data and the corresponding historical water pump operation frequency data in the temperature difference interval with the maximum data frequency according to a preset algorithm to obtain the temperature difference reference value and the frequency reference value.
11. The apparatus of claim 9, wherein the generating module comprises:
the comparison unit is used for comparing the temperature difference reference value with a preset temperature difference threshold value and comparing the frequency reference value with a preset frequency threshold value;
and the generating unit is used for generating an evaluation result of the running rationality of the water pump according to the comparison result.
12. An air conditioning system, comprising: an air conditioning unit and a water pump evaluation apparatus as claimed in any one of claims 9 to 11.
13. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 8.
14. An electronic device, comprising: one or more processors; memory for storing one or more programs, which when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-8.
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