CN116086844A - Energy efficiency evaluation method, device, system, equipment and storage medium - Google Patents
Energy efficiency evaluation method, device, system, equipment and storage medium Download PDFInfo
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- CN116086844A CN116086844A CN202211599565.7A CN202211599565A CN116086844A CN 116086844 A CN116086844 A CN 116086844A CN 202211599565 A CN202211599565 A CN 202211599565A CN 116086844 A CN116086844 A CN 116086844A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
Abstract
The application discloses an energy efficiency evaluation method, an energy efficiency evaluation device, an energy efficiency evaluation system, an energy efficiency evaluation device and a storage medium, wherein the energy efficiency evaluation method comprises the following steps: acquiring a historical working condition data set, and processing the historical working condition data set to acquire a target working condition data set; calculating to obtain a reference value based on the target working condition data set, and comparing the reference value with a preset threshold value; if the reference value is not greater than the preset threshold value, calculating based on an actual heat exchange coefficient set of the water chilling unit to obtain actual energy efficiency, calculating based on an ideal heat exchange coefficient set of the water chilling unit to obtain ideal energy efficiency, and calculating based on the actual energy efficiency and the ideal energy efficiency to obtain a first energy efficiency ratio. According to the technical scheme, the water flow meter is not required to be installed, and the energy efficiency of the water chilling unit can be monitored in real time and evaluated in real time.
Description
Technical Field
The application belongs to the technical field of air conditioners, and particularly relates to an energy efficiency evaluation method, an energy efficiency evaluation device, an energy efficiency evaluation system, energy efficiency evaluation equipment and an energy efficiency evaluation storage medium.
Background
At present, the energy efficiency of the water chilling unit of the air conditioner is obtained by installing a water flowmeter and a water supply and return temperature sensor on a chilled water pipe, and after the load of the water chilling unit is measured, the energy efficiency is obtained by dividing the load by the power, so that the real-time monitoring of the energy consumption of the water chilling unit is realized. If a plurality of coolers are arranged in the refrigeration machine room, the water flow meter is often arranged on the refrigeration water header pipe, and the total refrigeration water flow, the total load of the refrigeration machine room and the total energy efficiency are monitored, so that the energy efficiency of a single water chilling unit cannot be obtained.
The method for evaluating the energy efficiency of the water chilling unit is to compare the energy efficiency of the water chilling unit with the national standard or the American Air Conditioning and Heating and refrigeration industry Association (AHRI) standard, but the energy efficiency of the water chilling unit is closely related to the operation condition of the water chilling unit, and if the operation condition of the water chilling unit is inconsistent with the standard, the evaluation method is inaccurate; or the operation condition of the water chilling unit is adjusted to be consistent with the product catalog, and the current energy efficiency is compared with the energy efficiency on the product catalog, however, because the actual operation condition of the water chilling unit is often inconsistent with the product catalog, the method needs to manually adjust the operation condition of the water chilling unit, and therefore the energy efficiency of the water chilling unit cannot be estimated in real time.
Disclosure of Invention
The present application aims to solve, at least to some extent, one of the technical problems in the related art. To this end, an object of the present application is to propose an energy efficiency evaluation method, an apparatus, a system, a device and a storage medium.
In order to solve the technical problems, embodiments of the present application provide the following technical solutions:
an energy efficiency assessment method comprising:
acquiring a historical working condition data set, and processing the historical working condition data set to acquire a target working condition data set;
Calculating to obtain a reference value based on the target working condition data set, and comparing the reference value with a preset threshold value;
if the reference value is not greater than the preset threshold value, calculating based on an actual heat exchange coefficient set of the water chilling unit to obtain actual energy efficiency, calculating based on an ideal heat exchange coefficient set of the water chilling unit to obtain ideal energy efficiency, and calculating based on the actual energy efficiency and the ideal energy efficiency to obtain a first energy efficiency ratio.
Optionally, the historical working condition data set includes first historical working condition data of the compressor, second historical working condition data of the condenser and third historical working condition data of the evaporator.
Optionally, the calculating to obtain a reference value based on the target working condition data set, and comparing the reference value with a preset threshold value includes:
calculating to obtain a first sub-reference value, a second sub-reference value and a third sub-reference value based on the target working condition data set; wherein the reference value comprises a first sub-reference value, a second sub-reference value and a third sub-reference value; the calculating to obtain the first sub-reference value, the second sub-reference value and the third sub-reference value based on the target working condition data set includes: calculating and obtaining reference power of the compressor, first reference temperature differences at two ends of the condenser and second reference temperature differences at two ends of the evaporator based on the target working condition data; acquiring the actual power of the compressor, the first actual temperature difference at two ends of the condenser and the second actual temperature difference at two ends of the evaporator; calculating to obtain a first sub-reference value based on the reference power and the actual power; calculating to obtain a second sub-reference value based on the first reference temperature difference and the first actual temperature difference; calculating to obtain a third sub-reference value based on the second reference temperature difference and the second actual temperature difference;
Comparing the first sub-reference value with a first sub-preset threshold value, comparing the second sub-reference value with a second sub-preset threshold value, and comparing the third sub-reference value with a third sub-preset threshold value; the preset threshold value comprises a first sub-preset threshold value, a second sub-preset threshold value and a third sub-preset threshold value.
Optionally, if the reference value is not greater than the preset threshold, calculating based on an actual heat exchange coefficient set of the water chiller to obtain an actual energy efficiency, calculating based on an ideal heat exchange coefficient set of the water chiller to obtain an ideal energy efficiency, and calculating based on the actual energy efficiency and the ideal energy efficiency to obtain a first energy efficiency ratio, including:
if any one of the first sub-reference value not greater than the first sub-preset threshold value, the second sub-reference value not greater than the second sub-preset threshold value and the third sub-reference value not greater than the third sub-preset threshold value exists, calculating to obtain actual energy efficiency based on an actual heat exchange coefficient set of the water chilling unit, calculating to obtain ideal energy efficiency based on an ideal heat exchange coefficient set of the water chilling unit, and calculating to obtain the first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency.
Optionally, the method further comprises:
if the reference value is larger than the preset threshold value, calibrating the real-time heat exchange coefficient set of the water chilling unit to obtain a calibrated heat exchange coefficient set; the reference value is greater than the preset threshold, including that the first sub-reference value is greater than the first sub-preset threshold, the second sub-reference value is greater than the second sub-preset threshold, and the third sub-reference value is greater than the third sub-preset threshold; the real-time heat exchange coefficient set comprises a condenser heat exchange coefficient, a compressor heat exchange coefficient and an evaporator heat exchange coefficient;
acquiring the accumulated running time of the water chilling unit, and comparing the accumulated running time with a running time threshold;
if the accumulated running time is smaller than the running time threshold, updating the ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set, and obtaining an updated ideal heat exchange coefficient set;
or if the accumulated running time is not smaller than the running time threshold, updating the actual wanted heat exchange coefficient set based on the calibrated heat exchange coefficient set, and obtaining an updated actual heat exchange coefficient set.
Optionally, after updating the ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set and obtaining an updated ideal heat exchange coefficient set, the method includes:
Calculating to obtain updated ideal energy efficiency based on the updated ideal heat exchange coefficient set;
calculating to obtain the actual energy efficiency based on the actual heat exchange coefficient set;
and calculating and obtaining a second energy efficiency ratio based on the updated ideal energy efficiency and the actual energy efficiency.
Optionally, after updating the actual desired heat exchange coefficient set based on the calibrated heat exchange coefficient set and obtaining an updated actual heat exchange coefficient set, the method includes:
calculating to obtain updated ideal energy efficiency based on the updated ideal heat exchange coefficient set;
calculating to obtain the updated actual energy efficiency based on the updated actual heat exchange coefficient set;
and calculating to obtain a third energy efficiency ratio based on the updated ideal energy efficiency and the updated actual energy efficiency.
The embodiment of the application also provides an energy efficiency evaluation device, which comprises:
the acquisition module is used for acquiring a historical working condition data set, processing the historical working condition data set and acquiring a target working condition data set;
the comparison module is used for calculating and obtaining a reference value based on the target working condition data set and comparing the reference value with a preset threshold value;
and the calculation module is used for calculating to obtain actual energy efficiency based on an actual heat exchange coefficient set of the water chilling unit, calculating to obtain ideal energy efficiency based on an ideal heat exchange coefficient set of the water chilling unit and calculating to obtain a first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency if the reference value is not greater than the preset threshold value.
Embodiments of the present application also provide an energy efficiency evaluation system, including:
the data acquisition unit is in communication connection with the data evaluation unit;
the data acquisition unit is used for acquiring and acquiring a historical working condition data set;
the data evaluation unit is used for processing the historical working condition data set to obtain a target working condition data set;
the comparison module is used for calculating and obtaining a reference value based on the target working condition data set and comparing the reference value with a preset threshold value; if the reference value is not greater than the preset threshold value, calculating based on an actual heat exchange coefficient set of the water chilling unit to obtain actual energy efficiency, calculating based on an ideal heat exchange coefficient set of the water chilling unit to obtain ideal energy efficiency, and calculating based on the actual energy efficiency and the ideal energy efficiency to obtain a first energy efficiency ratio.
Embodiments of the present application also provide an electronic device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the method as described above when executing the computer program.
Embodiments of the present application also provide a computer readable storage medium, where the computer readable storage medium includes a stored computer program, where the computer program when executed controls a device in which the computer readable storage medium is located to perform a method as described above.
The embodiment of the application has the following technical effects:
according to the technical scheme, 1) the water flow meter is not required to be installed, the energy efficiency of the water chilling unit can be monitored in real time and evaluated in real time, and specifically, the first energy efficiency ratio can be obtained through calculation based on the actual energy efficiency and the ideal energy efficiency, and the method is simple and rapid.
2) The real-time heat exchange coefficient set of the water chilling unit can be calibrated on line and in real time based on the simulation model.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
FIG. 1 is a schematic diagram of an energy efficiency evaluation system according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of an energy efficiency evaluation method according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart of online calibration according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an energy efficiency evaluation device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
As shown in fig. 1, an embodiment of the present application provides an energy efficiency evaluation system, including:
a data acquisition unit 101 and a data evaluation unit 1023 which are connected in communication;
the data acquisition unit 101 is used for acquiring and acquiring a historical working condition data set;
the data evaluation unit 1023 is used for processing the historical working condition data set to obtain a target working condition data set;
the comparison module is used for calculating and obtaining a reference value based on the target working condition data set and comparing the reference value with a preset threshold value; if the reference value is not greater than the preset threshold value, calculating based on an actual heat exchange coefficient set of the water chilling unit to obtain actual energy efficiency, calculating based on an ideal heat exchange coefficient set of the water chilling unit to obtain ideal energy efficiency, and calculating based on the actual energy efficiency and the ideal energy efficiency to obtain a first energy efficiency ratio.
In an alternative embodiment of the present application, the data acquisition unit 101 includes a first sub-data acquisition unit 101, a second sub-data acquisition unit 101, and a third sub-data acquisition unit 101; the first sub-data acquisition unit 101 is used for acquiring first historical working condition data of the compressor, and the first sub-data acquisition unit 101 comprises a suction and exhaust pressure sensor, a compressor temperature sensor, a power sensor, an inlet guide vane sensor and the like;
The second sub-data acquisition unit 101 is used for acquiring second historical working condition data of the condenser, and the second sub-data acquisition unit 101 comprises a condenser inlet and outlet water temperature sensor, a condensation saturation temperature sensor and the like;
the third sub-data acquisition unit 101 is configured to acquire third historical operating condition data of the evaporator, where the third sub-data acquisition unit 101 includes an evaporator inlet and outlet water temperature sensor, an evaporation saturation temperature sensor, and the like.
In an alternative embodiment of the present application, the data evaluation unit 1023 is obtained based on the edge device 102 (e.g. a computer, etc.), the data evaluation unit 1023 feeds back the energy efficiency ratio to the edge device 102 after obtaining the energy efficiency ratio, and the edge device 102 displays the first energy efficiency ratio based on the display unit 1024 after obtaining the energy efficiency ratio, so that the user can obtain the first energy efficiency ratio for each chiller in real time.
According to the embodiment of the application, the first energy efficiency ratio is displayed in real time through the display unit 1024 of the edge device 102, so that a user can intuitively see the real-time energy efficiency ratio and the change state of the energy efficiency ratio of each water chilling unit through the display unit 1024 of the edge device 102, a worker can conveniently determine the energy efficiency attenuation degree of the water chilling unit according to the real-time energy efficiency ratio, and a timely maintenance plan is formulated according to the attenuation degree, so that the normal operation of the water chilling unit is ensured, and the operation and maintenance cost is reduced.
In an alternative embodiment of the present application, the data evaluation unit 1023 includes a calibration subunit 10231 and a calculation subunit 10232; wherein the labeling subunit 10231 is communicatively coupled to the computing subunit 10232; the calibration subunit 10231 is configured to calibrate the actual heat exchange coefficient set or the ideal heat exchange coefficient set, obtain an updated actual heat exchange coefficient set or an updated ideal heat exchange coefficient set correspondingly, and send the updated actual heat exchange coefficient set or the updated ideal heat exchange coefficient set to the calculation submodule; the calculating submodule is used for calculating and obtaining a first energy efficiency ratio based on the obtained actual heat exchange coefficient set and the ideal heat exchange coefficient set; or calculating to obtain a second energy efficiency ratio based on the obtained updated ideal heat exchange coefficient set and the actual heat exchange coefficient set; or based on the obtained updated ideal heat exchange coefficient set and the updated actual heat exchange coefficient set, calculating to obtain a third energy efficiency ratio; the calibration subunit 10231 may be implemented based on a simulation model.
An alternative embodiment of the present application further comprises a data preprocessing unit 1022, the data preprocessing unit 1022 being available based on the edge device 102, the data preprocessing unit 1022 being communicatively connected to the data evaluation unit 1023; meanwhile, the data preprocessing unit 1022 is also in communication connection with the data acquisition unit 101, and the data preprocessing unit 1022 is configured to preprocess the historical operating mode data set to obtain a preprocessing result, and send the preprocessing result to the calibration subunit 10231 of the data evaluation unit 1023 for subsequent processing.
In an optional embodiment of the present application, the apparatus further includes a data storage unit 1021, where the data storage unit 1021 may be obtained based on the edge device 102, and the data storage unit 1021 is communicatively connected to the data acquisition unit 101 and the data preprocessing unit 1022, respectively; the data storage unit 1021 is configured to acquire a historical operating condition data set, store the historical operating condition data set, and then send the historical operating condition data set to the data preprocessing unit 1022 for subsequent processing.
According to the embodiment of the application, the working condition data of each water chilling unit are acquired based on the data acquisition unit 101, the acquired historical working condition data set is processed and calculated based on a plurality of units in the edge equipment 102, and the energy efficiency ratio of each water chilling unit is obtained in real time.
As shown in fig. 2, an energy efficiency evaluation method is applied to the system shown in fig. 1, and includes:
step S21: acquiring a historical working condition data set, and processing the historical working condition data set to acquire a target working condition data set;
in an optional embodiment of the present application, the historical operating condition data set includes first historical operating condition data of the compressor, second historical operating condition data of the condenser, and third historical operating condition data of the evaporator.
The method comprises the steps of acquiring operation data of a water chilling unit based on a preset acquisition time length and acquiring a historical working condition data set; for example, if the preset collection duration is 2 hours, the historical working condition data set includes 2 hours of time sequence data; in addition, the preset acquisition time length can be adjusted based on actual needs.
Further, the first historical operating condition data comprises compressor suction and exhaust pressure, suction temperature, power, inlet guide vane opening degree and rotating speed;
the second historical working condition data comprises water inlet and outlet temperatures of the condenser and condensation saturation temperature;
the third historical working condition data comprises the water inlet and outlet temperature and the evaporation saturation temperature of the evaporator;
in addition, the historical working condition data set also comprises running state data of the water chilling unit and running time of the water chilling unit; the running time of the water chilling unit is accumulated running time.
In an optional embodiment of the present application, the processing the historical operating condition dataset to obtain a target operating condition dataset includes:
and eliminating abnormal data in the historical working condition data set, and retaining the historical working condition data corresponding to the stable working condition.
For example, a condenser water inlet and outlet temperature threshold range and a condensation saturation temperature threshold range are preset, and when the condenser water inlet and outlet temperature exceeds the condenser water inlet and outlet temperature threshold range in the second historical working condition data, the data corresponding to the condenser water inlet and outlet temperature exceeding the condenser water inlet and outlet temperature threshold range are removed;
And when the condensation saturation temperature exceeds the condensation saturation temperature threshold range in the second historical working condition data, eliminating abnormal data corresponding to the condensation saturation temperature exceeding the condensation saturation temperature threshold range.
And similarly, preprocessing the first historical working condition data and the third historical working condition data, and eliminating abnormal data in the first historical working condition data and the third historical working condition data.
After the preprocessing of the historical operating condition data set is completed, a target operating condition data set is obtained.
It should be noted that, preset values such as the water inlet and outlet temperature threshold range and the condensation saturation temperature threshold range of the condenser may be adjusted according to actual needs, and embodiments of the present application are not limited specifically.
Step S22: calculating to obtain a reference value based on the target working condition data set, and comparing the reference value with a preset threshold value;
in an optional embodiment of the present application, the calculating to obtain a reference value based on the target working condition data set, and comparing the reference value with a preset threshold value includes:
calculating to obtain a first sub-reference value, a second sub-reference value and a third sub-reference value based on the target working condition data set; wherein the reference value comprises a first sub-reference value, a second sub-reference value and a third sub-reference value; the calculating to obtain the first sub-reference value, the second sub-reference value and the third sub-reference value based on the target working condition data set includes: calculating and obtaining reference power of the compressor, first reference temperature differences at two ends of the condenser and second reference temperature differences at two ends of the evaporator based on the target working condition data; acquiring the actual power of the compressor, the first actual temperature difference at two ends of the condenser and the second actual temperature difference at two ends of the evaporator; calculating to obtain a first sub-reference value based on the reference power and the actual power; calculating to obtain a second sub-reference value based on the first reference temperature difference and the first actual temperature difference; calculating to obtain a third sub-reference value based on the second reference temperature difference and the second actual temperature difference;
Comparing the first sub-reference value with a first sub-preset threshold value, comparing the second sub-reference value with a second sub-preset threshold value, and comparing the third sub-reference value with a third sub-preset threshold value; the preset threshold value comprises a first sub-preset threshold value, a second sub-preset threshold value and a third sub-preset threshold value.
In an alternative embodiment of the present application, the first sub-reference value may be obtained based on an absolute value of a difference between the reference power and the actual power; the second sub-reference value may be obtained based on an absolute value of a difference between the first reference temperature difference and the second actual temperature difference; the third sub-reference value may be calculated based on an absolute value of a difference between the second reference temperature difference and the second actual temperature difference;
the reference power can be obtained by calculation based on the power data in the target working condition data set, specifically, the preset acquisition time length corresponding to the target working condition data set is obtained, the average power value of the target working condition data set in the corresponding preset acquisition time length is obtained by calculation, and the average power value is determined as the reference power;
the first reference temperature difference can be obtained based on actual temperature difference data of two ends of the condenser in the target working condition data set through calculation; specifically, a preset acquisition time length corresponding to a target working condition data set is obtained, a first average temperature difference of two ends of a condenser of the target working condition data set in the corresponding preset acquisition time length is obtained through calculation, and the first average temperature difference is determined to be a first reference temperature difference;
The second reference temperature difference can be obtained based on actual temperature difference data of two ends of the evaporator in the target working condition data set through calculation; specifically, a preset acquisition time length corresponding to the target working condition data set is obtained, a second average temperature difference of two ends of the evaporator of the target working condition data set in the corresponding preset acquisition time length is obtained through calculation, and the second average temperature difference is determined to be a second reference temperature difference.
Further, the actual power, the first actual temperature difference, and the second actual temperature difference may be obtained based on the corresponding sensors, respectively.
Step S23: if the reference value is not greater than the preset threshold value, calculating based on an actual heat exchange coefficient set of the water chilling unit to obtain actual energy efficiency, calculating based on an ideal heat exchange coefficient set of the water chilling unit to obtain ideal energy efficiency, and calculating based on the actual energy efficiency and the ideal energy efficiency to obtain a first energy efficiency ratio.
In an optional embodiment of the present application, if the reference value is not greater than the preset threshold, calculating based on an actual heat exchange coefficient set of the water chiller to obtain an actual energy efficiency, calculating based on an ideal heat exchange coefficient set of the water chiller to obtain an ideal energy efficiency, and calculating based on the actual energy efficiency and the ideal energy efficiency to obtain a first energy efficiency ratio, including:
If any one of the first sub-reference value not greater than the first sub-preset threshold value, the second sub-reference value not greater than the second sub-preset threshold value and the third sub-reference value not greater than the third sub-preset threshold value exists, calculating to obtain actual energy efficiency based on an actual heat exchange coefficient set of the water chilling unit, calculating to obtain ideal energy efficiency based on an ideal heat exchange coefficient set of the water chilling unit, and calculating to obtain a first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency.
In an optional embodiment of the present application, when the first sub-reference value is not greater than the first sub-preset threshold, the second sub-reference value is not greater than the second sub-preset threshold, and the third sub-reference value is not greater than the third sub-preset threshold, the actual energy efficiency is obtained based on the actual heat exchange coefficient set of the water chiller, the ideal energy efficiency is obtained based on the ideal heat exchange coefficient set of the water chiller, and the first energy efficiency ratio is obtained based on the actual energy efficiency and the ideal energy efficiency.
In an optional embodiment of the present application, when the first sub-reference value is not greater than the first sub-preset threshold, the second sub-reference value is greater than the second sub-preset threshold, and the third sub-reference value is greater than the third sub-preset threshold, the actual energy efficiency is obtained based on the actual heat exchange coefficient set of the water chilling unit, the ideal energy efficiency is obtained based on the ideal heat exchange coefficient set of the water chilling unit, and the first energy efficiency ratio is obtained based on the actual energy efficiency and the ideal energy efficiency.
In an optional embodiment of the present application, when the first sub-reference value is not greater than the first sub-preset threshold, the second sub-reference value is greater than the second sub-preset threshold, and the third sub-reference value is not greater than the third sub-preset threshold, the actual energy efficiency is obtained based on the actual heat exchange coefficient set of the water chiller, the ideal energy efficiency is obtained based on the ideal heat exchange coefficient set of the water chiller, and the first energy efficiency ratio is obtained based on the actual energy efficiency and the ideal energy efficiency.
According to the embodiment of the application, the energy efficiency of the water chilling unit can be monitored and evaluated in real time without installing a water flowmeter, and specifically, the first energy efficiency ratio can be obtained through calculation based on the actual energy efficiency and the ideal energy efficiency, and the method is simple and rapid.
In an optional embodiment of the present application, as long as any one of the first sub-reference value is not greater than the first sub-preset threshold, the second sub-reference value is not greater than the second sub-preset threshold, and the third sub-reference value is not greater than the third sub-preset threshold exists, the first actual energy efficiency may be obtained through calculation based on the actual heat exchange coefficient set stored currently; meanwhile, based on an ideal heat exchange coefficient set, ideal energy efficiency is obtained through calculation, and the actual heat exchange coefficient set of the water chilling unit is not required to be calibrated.
In an alternative embodiment of the present application, it may be assumed that the first sub-preset threshold is 5%, the second sub-preset threshold is 5K, and the third sub-preset threshold is also 5K; the first preset threshold, the second preset threshold and the third preset threshold can be adjusted in real time according to different water chilling units and different working conditions.
In an alternative embodiment of the present application, the first energy efficiency ratio=actual energy efficiency/ideal energy efficiency.
As shown in fig. 3, an alternative embodiment of the present application further includes:
step S24: if the reference value is larger than the preset threshold value, calibrating the real-time heat exchange coefficient set of the water chilling unit to obtain a calibrated heat exchange coefficient set; the reference value is greater than the preset threshold, including that the first sub-reference value is greater than the first sub-preset threshold, the second sub-reference value is greater than the second sub-preset threshold, and the third sub-reference value is greater than the third sub-preset threshold; the real-time heat exchange coefficient set comprises a condenser heat exchange coefficient, a compressor heat exchange coefficient and an evaporator heat exchange coefficient;
step S25: acquiring the accumulated running time of the water chilling unit, and comparing the accumulated running time with a running time threshold;
Step S26: if the accumulated running time is smaller than the running time threshold, updating the ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set, and obtaining an updated ideal heat exchange coefficient set;
step S27: or if the accumulated running time is not smaller than the running time threshold, updating the actual wanted heat exchange coefficient set based on the calibrated heat exchange coefficient set, and obtaining an updated actual heat exchange coefficient set.
According to the embodiment of the application, the real-time heat exchange coefficient set of the water chilling unit can be calibrated on line and in real time based on the simulation model.
In an optional embodiment of the present application, when the first sub-reference value is greater than 5%, the second sub-reference value is greater than 5K, and meanwhile, the third sub-reference value is greater than 5K, the real-time heat exchange coefficient set of the water chiller is calibrated based on the simulation model.
In an optional embodiment of the present application, after calibration of the real-time heat exchange coefficient set is completed based on the simulation model, the accumulated running time of the water chiller is obtained, and the accumulated running time is compared with a running time threshold; wherein the run time threshold may be 1 week; for the running time threshold value, real-time adjustment can be performed according to actual needs.
When the accumulated running time is less than 1 week, storing a calibrated heat exchange coefficient set, and determining the calibrated heat exchange coefficient set as an updated ideal heat exchange coefficient set; or when the accumulated running time is not less than 1 week, determining the calibrated heat exchange coefficient set as an updated actual heat exchange coefficient set.
In an optional embodiment of the application, updating the real-time heat exchange coefficient set of the water chilling unit based on the simulation model comprises calibrating the heat exchange coefficient of the condenser, the heat exchange coefficient of the compressor and the heat exchange coefficient of the evaporator simultaneously based on the simulation model; the calibration mode can be to adjust, correct or compensate the heat exchange coefficient of the condenser, the heat exchange coefficient of the compressor and the heat exchange coefficient of the evaporator at the same time.
An optional embodiment of the present application, after updating the ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set and obtaining an updated ideal heat exchange coefficient set, includes:
calculating to obtain updated ideal energy efficiency based on the updated ideal heat exchange coefficient set;
calculating to obtain the actual energy efficiency based on the actual heat exchange coefficient set;
and calculating and obtaining a second energy efficiency ratio based on the updated ideal energy efficiency and the actual energy efficiency.
In an alternative embodiment of the present application, the second energy efficiency ratio=actual energy efficiency/updated ideal energy efficiency.
An optional embodiment of the present application, after updating the actual desired heat exchange coefficient set based on the calibrated heat exchange coefficient set and obtaining an updated actual heat exchange coefficient set, includes:
calculating to obtain updated ideal energy efficiency based on the updated ideal heat exchange coefficient set;
calculating to obtain the updated actual energy efficiency based on the updated actual heat exchange coefficient set;
and calculating to obtain a third energy efficiency ratio based on the updated ideal energy efficiency and the updated actual energy efficiency.
In an alternative embodiment of the present application, the third energy efficiency ratio=update actual energy efficiency/update ideal energy efficiency.
According to the method and the device, the load of the chilled water can be obtained by calculating the flow and the chilled water temperature difference based on monitoring the flow of the chilled water of the water chilling unit, the water supply and return temperature and the power of the water chilling unit, and the energy efficiency ratio can be obtained by calculating the load/power.
In an optional embodiment of the present application, 1) comparing the actually measured energy efficiency of the water chiller with a standard to obtain an evaluation result of the current energy efficiency of the water chiller.
2) And acquiring operation data of the water chilling unit, selecting the operation data of the water chilling unit similar to the current operation condition from the historical data, comparing the current energy efficiency with the historical energy efficiency, and acquiring the attenuation degree of the energy efficiency of the water chilling unit.
3) And (3) comparing the product catalogue, adjusting the operation working condition of the water chilling unit to be consistent with the product catalogue, measuring the energy efficiency of the water chilling unit under the operation working condition, and comparing the energy efficiency with the data in the product catalogue to obtain the current operation state of the water chilling unit.
As shown in fig. 4, an embodiment of the present application further provides an energy efficiency evaluation apparatus 40, including:
the acquisition module 41 is configured to acquire a historical working condition data set, and process the historical working condition data set to obtain a target working condition data set;
the comparison module 42 is configured to calculate and obtain a reference value based on the target working condition data set, and compare the reference value with a preset threshold;
and the calculating module 43 is configured to calculate an actual energy efficiency based on an actual heat exchange coefficient set of the water chiller, calculate an ideal energy efficiency based on an ideal heat exchange coefficient set of the water chiller, and calculate a first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency if the reference value is not greater than the preset threshold.
Optionally, the historical working condition data set includes first historical working condition data of the compressor, second historical working condition data of the condenser and third historical working condition data of the evaporator.
Optionally, the calculating to obtain a reference value based on the target working condition data set, and comparing the reference value with a preset threshold value includes:
calculating to obtain a first sub-reference value, a second sub-reference value and a third sub-reference value based on the target working condition data set; wherein the reference value comprises a first sub-reference value, a second sub-reference value and a third sub-reference value; the calculating to obtain the first sub-reference value, the second sub-reference value and the third sub-reference value based on the target working condition data set includes: calculating and obtaining reference power of the compressor, first reference temperature differences at two ends of the condenser and second reference temperature differences at two ends of the evaporator based on the target working condition data; acquiring the actual power of the compressor, the first actual temperature difference at two ends of the condenser and the second actual temperature difference at two ends of the evaporator; calculating to obtain a first sub-reference value based on the reference power and the actual power; calculating to obtain a second sub-reference value based on the first reference temperature difference and the first actual temperature difference; calculating to obtain a third sub-reference value based on the second reference temperature difference and the second actual temperature difference;
comparing the first sub-reference value with a first sub-preset threshold value, comparing the second sub-reference value with a second sub-preset threshold value, and comparing the third sub-reference value with a third sub-preset threshold value; the preset threshold value comprises a first sub-preset threshold value, a second sub-preset threshold value and a third sub-preset threshold value.
Optionally, if the reference value is not greater than the preset threshold, calculating based on an actual heat exchange coefficient set of the water chiller to obtain an actual energy efficiency, calculating based on an ideal heat exchange coefficient set of the water chiller to obtain an ideal energy efficiency, and calculating based on the actual energy efficiency and the ideal energy efficiency to obtain a first energy efficiency ratio, including:
if any one of the first sub-reference value not greater than the first sub-preset threshold value, the second sub-reference value not greater than the second sub-preset threshold value and the third sub-reference value not greater than the third sub-preset threshold value exists, calculating to obtain actual energy efficiency based on an actual heat exchange coefficient set of the water chilling unit, calculating to obtain ideal energy efficiency based on an ideal heat exchange coefficient set of the water chilling unit, and calculating to obtain the first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency; the actual heat exchange coefficient set comprises a condenser heat exchange coefficient, a compressor heat exchange coefficient and an evaporator heat exchange coefficient.
Optionally, the method further comprises:
if the reference value is larger than the preset threshold value, calibrating the real-time heat exchange coefficient set of the water chilling unit to obtain a calibrated heat exchange coefficient set; the reference value is greater than the preset threshold, including that the first sub-reference value is greater than the first sub-preset threshold, the second sub-reference value is greater than the second sub-preset threshold, and the third sub-reference value is greater than the third sub-preset threshold; the real-time heat exchange coefficient set comprises a condenser heat exchange coefficient, a compressor heat exchange coefficient and an evaporator heat exchange coefficient;
Acquiring the accumulated running time of the water chilling unit, and comparing the accumulated running time with a running time threshold;
if the accumulated running time is smaller than the running time threshold, updating the ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set, and obtaining an updated ideal heat exchange coefficient set;
or if the accumulated running time is not smaller than the running time threshold, updating the actual wanted heat exchange coefficient set based on the calibrated heat exchange coefficient set, and obtaining an updated actual heat exchange coefficient set.
Optionally, after updating the ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set and obtaining an updated ideal heat exchange coefficient set, the method includes:
calculating to obtain updated ideal energy efficiency based on the updated ideal heat exchange coefficient set;
calculating to obtain the actual energy efficiency based on the actual heat exchange coefficient set;
and calculating and obtaining a second energy efficiency ratio based on the updated ideal energy efficiency and the actual energy efficiency.
Optionally, after updating the actual desired heat exchange coefficient set based on the calibrated heat exchange coefficient set and obtaining an updated actual heat exchange coefficient set, the method includes:
calculating to obtain updated ideal energy efficiency based on the updated ideal heat exchange coefficient set;
Calculating to obtain the updated actual energy efficiency based on the updated actual heat exchange coefficient set;
and calculating to obtain a third energy efficiency ratio based on the updated ideal energy efficiency and the updated actual energy efficiency.
Embodiments of the present application also provide an electronic device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the method as described above when executing the computer program.
Embodiments of the present application also provide a computer readable storage medium, where the computer readable storage medium includes a stored computer program, where the computer program when executed controls a device in which the computer readable storage medium is located to perform a method as described above.
In addition, other structures and functions of the device according to the embodiments of the present application are known to those skilled in the art, and are not described herein for redundancy reduction.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (11)
1. An energy efficiency evaluation method, comprising:
acquiring a historical working condition data set, and processing the historical working condition data set to acquire a target working condition data set;
calculating to obtain a reference value based on the target working condition data set, and comparing the reference value with a preset threshold value;
if the reference value is not greater than the preset threshold value, calculating based on an actual heat exchange coefficient set of the water chilling unit to obtain actual energy efficiency, calculating based on an ideal heat exchange coefficient set of the water chilling unit to obtain ideal energy efficiency, and calculating based on the actual energy efficiency and the ideal energy efficiency to obtain a first energy efficiency ratio.
2. The method of claim 1, wherein the set of historical operating condition data comprises first historical operating condition data for a compressor, second historical operating condition data for a condenser, and third historical operating condition data for an evaporator.
3. The method according to claim 1 or 2, wherein calculating a reference value based on the target operating condition data set and comparing the reference value with a preset threshold value comprises:
calculating to obtain a first sub-reference value, a second sub-reference value and a third sub-reference value based on the target working condition data set; wherein the reference value comprises a first sub-reference value, a second sub-reference value and a third sub-reference value; the calculating to obtain the first sub-reference value, the second sub-reference value and the third sub-reference value based on the target working condition data set includes: calculating and obtaining reference power of the compressor, first reference temperature differences at two ends of the condenser and second reference temperature differences at two ends of the evaporator based on the target working condition data; acquiring the actual power of the compressor, the first actual temperature difference at two ends of the condenser and the second actual temperature difference at two ends of the evaporator; calculating to obtain a first sub-reference value based on the reference power and the actual power; calculating to obtain a second sub-reference value based on the first reference temperature difference and the first actual temperature difference; calculating to obtain a third sub-reference value based on the second reference temperature difference and the second actual temperature difference;
Comparing the first sub-reference value with a first sub-preset threshold value, comparing the second sub-reference value with a second sub-preset threshold value, and comparing the third sub-reference value with a third sub-preset threshold value; the preset threshold value comprises a first sub-preset threshold value, a second sub-preset threshold value and a third sub-preset threshold value.
4. The method of claim 3, wherein if the reference value is not greater than the preset threshold, calculating to obtain an actual energy efficiency based on an actual heat exchange coefficient set of the chiller, calculating to obtain an ideal energy efficiency based on an ideal heat exchange coefficient set of the chiller, and calculating to obtain a first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency, comprising:
if any one of the first sub-reference value not greater than the first sub-preset threshold value, the second sub-reference value not greater than the second sub-preset threshold value and the third sub-reference value not greater than the third sub-preset threshold value exists, calculating to obtain actual energy efficiency based on an actual heat exchange coefficient set of the water chilling unit, calculating to obtain ideal energy efficiency based on an ideal heat exchange coefficient set of the water chilling unit, and calculating to obtain the first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency.
5. The method as recited in claim 4, further comprising:
if the reference value is larger than the preset threshold value, calibrating the real-time heat exchange coefficient set of the water chilling unit to obtain a calibrated heat exchange coefficient set; the reference value is greater than the preset threshold, including that the first sub-reference value is greater than the first sub-preset threshold, the second sub-reference value is greater than the second sub-preset threshold, and the third sub-reference value is greater than the third sub-preset threshold; the real-time heat exchange coefficient set comprises a condenser heat exchange coefficient, a compressor heat exchange coefficient and an evaporator heat exchange coefficient;
acquiring the accumulated running time of the water chilling unit, and comparing the accumulated running time with a running time threshold;
if the accumulated running time is smaller than the running time threshold, updating the ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set, and obtaining an updated ideal heat exchange coefficient set;
or if the accumulated running time is not smaller than the running time threshold, updating the actual wanted heat exchange coefficient set based on the calibrated heat exchange coefficient set, and obtaining an updated actual heat exchange coefficient set.
6. The method of claim 5, wherein after updating the set of ideal heat exchange coefficients based on the set of calibrated heat exchange coefficients and obtaining an updated set of ideal heat exchange coefficients, comprising:
calculating to obtain updated ideal energy efficiency based on the updated ideal heat exchange coefficient set;
calculating to obtain the actual energy efficiency based on the actual heat exchange coefficient set;
and calculating and obtaining a second energy efficiency ratio based on the updated ideal energy efficiency and the actual energy efficiency.
7. The method of claim 5, wherein after updating the actual desired heat exchange coefficient set based on the calibrated heat exchange coefficient set and obtaining an updated actual heat exchange coefficient set, comprising:
calculating to obtain updated ideal energy efficiency based on the updated ideal heat exchange coefficient set;
calculating to obtain the updated actual energy efficiency based on the updated actual heat exchange coefficient set;
and calculating to obtain a third energy efficiency ratio based on the updated ideal energy efficiency and the updated actual energy efficiency.
8. An energy efficiency evaluation device, comprising:
the acquisition module is used for acquiring a historical working condition data set, processing the historical working condition data set and acquiring a target working condition data set;
The comparison module is used for calculating and obtaining a reference value based on the target working condition data set and comparing the reference value with a preset threshold value;
and the calculation module is used for calculating to obtain actual energy efficiency based on an actual heat exchange coefficient set of the water chilling unit, calculating to obtain ideal energy efficiency based on an ideal heat exchange coefficient set of the water chilling unit and calculating to obtain a first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency if the reference value is not greater than the preset threshold value.
9. An energy efficiency evaluation system, comprising:
the data acquisition unit is in communication connection with the data evaluation unit;
the data acquisition unit is used for acquiring and acquiring a historical working condition data set;
the data evaluation unit is used for processing the historical working condition data set to obtain a target working condition data set;
the comparison module is used for calculating and obtaining a reference value based on the target working condition data set and comparing the reference value with a preset threshold value; if the reference value is not greater than the preset threshold value, calculating based on an actual heat exchange coefficient set of the water chilling unit to obtain actual energy efficiency, calculating based on an ideal heat exchange coefficient set of the water chilling unit to obtain ideal energy efficiency, and calculating based on the actual energy efficiency and the ideal energy efficiency to obtain a first energy efficiency ratio.
10. An electronic device comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the method of any one of claims 1 to 7 when the computer program is executed.
11. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored computer program, wherein the computer program, when run, controls a device in which the computer readable storage medium is located to perform the method according to any one of claims 1 to 7.
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