Energy efficiency evaluation method, device, system, apparatus and storage medium

Abstract

The application discloses an energy efficiency evaluation method, device, system, equipment and storage medium. The method comprises the following steps: obtaining a historical working condition data set, processing the historical working condition data set, and obtaining a target working condition data set; based on the target working condition data set, a reference value is calculated, and the reference value is compared with a preset threshold value; if the reference value is not greater than the preset threshold value, an actual energy efficiency is calculated based on an actual heat exchange coefficient set of a water chiller, an ideal energy efficiency is calculated based on an ideal heat exchange coefficient set of the water chiller, and a first energy efficiency ratio is calculated based on the actual energy efficiency and the ideal energy efficiency. The technical scheme of the application can realize real-time monitoring and real-time evaluation of the energy efficiency of the water chiller without installing a water flow meter.

Description

Technical Field

[0001] This application belongs to the field of air conditioning technology, and in particular relates to an energy efficiency assessment method, apparatus, system, equipment and storage medium. Background Technology

[0002] Currently, obtaining the energy efficiency of air conditioning chiller units requires installing water flow meters and supply and return water temperature sensors on the chilled water pipes. After measuring the chiller unit's load, the energy efficiency is calculated by dividing the load by the power, enabling real-time monitoring of the chiller unit's energy consumption. If multiple chillers are installed in the chiller room, the water flow meter is often installed on the main chilled water pipe, monitoring the total chilled water flow, the total load of the chiller room, and the total energy efficiency, but not the energy efficiency of a single chiller unit.

[0003] The method for evaluating the energy efficiency of chiller units involves comparing their energy efficiency with national standards or the standards of the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) in the United States. However, the energy efficiency of chiller units is closely related to their operating conditions. If the operating conditions of the chiller unit are inconsistent with those in the standard, this evaluation method is inaccurate. Alternatively, the operating conditions of the chiller unit can be adjusted to match those in the product catalog, and the current energy efficiency can be compared with the energy efficiency listed in the catalog. However, since the actual operating conditions of chiller units often differ from those in the product catalog, this method requires manual adjustment of the chiller unit's operating conditions and therefore cannot provide real-time evaluation of the chiller unit's energy efficiency. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art. Therefore, one objective of this application is to provide an energy efficiency assessment method, apparatus, system, device, and storage medium.

[0005] To address the aforementioned technical problems, embodiments of this application provide the following technical solutions:

[0006] An energy efficiency assessment method, comprising:

[0007] Obtain historical operating condition datasets and process the historical operating condition datasets to obtain target operating condition datasets;

[0008] Based on the target working condition dataset, a reference value is calculated and compared with a preset threshold.

[0009] If the reference value is not greater than the preset threshold, the actual energy efficiency is calculated based on the actual heat transfer coefficient set of the chiller unit, the ideal energy efficiency is calculated based on the ideal heat transfer coefficient set of the chiller unit, and the first energy efficiency ratio is calculated based on the actual energy efficiency and the ideal energy efficiency.

[0010] 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.

[0011] Optionally, the obtaining of the reference value based on the target working condition data set and the comparison of the reference value with the preset threshold value include:

[0012] The first sub-reference value, the second sub-reference value, and the third sub-reference value are calculated based on the target working condition data set; the reference value includes the first sub-reference value, the second sub-reference value, and the third sub-reference value; the first sub-reference value, the second sub-reference value, and the third sub-reference value are calculated based on the target working condition data, including: a reference power of the compressor, a first reference temperature difference between the condenser, and a second reference temperature difference between the evaporator are calculated based on the target working condition data; an actual power of the compressor, a first actual temperature difference between the condenser, and a second actual temperature difference between the evaporator are obtained; the first sub-reference value is calculated based on the reference power and the actual power; the second sub-reference value is calculated based on the first reference temperature difference and the first actual temperature difference; and the third sub-reference value is calculated based on the second reference temperature difference and the second actual temperature difference.

[0013] The first sub-reference value is compared with a first sub-pre-set threshold value, the second sub-reference value is compared with a second sub-pre-set threshold value, and the third sub-reference value is compared with a third sub-pre-set threshold value; the preset threshold value includes the first sub-pre-set threshold value, the second sub-pre-set threshold value, and the third sub-pre-set threshold value.

[0014] Optionally, if the reference value is not greater than the preset threshold value, an actual energy efficiency is calculated based on an actual heat exchange coefficient set of the water chiller, an ideal energy efficiency is calculated based on an ideal heat exchange coefficient set of the water chiller, and a first energy efficiency ratio is calculated based on the actual energy efficiency and the ideal energy efficiency, including:

[0015] If any one of the following conditions exists: the first sub-reference value is not greater than the first sub-pre-set threshold value, the second sub-reference value is not greater than the second sub-pre-set threshold value, and the third sub-reference value is not greater than the third sub-pre-set threshold value, an actual energy efficiency is calculated based on an actual heat exchange coefficient set of the water chiller, an ideal energy efficiency is calculated based on an ideal heat exchange coefficient set of the water chiller, and a first energy efficiency ratio is calculated based on the actual energy efficiency and the ideal energy efficiency.

[0016] Optionally, the method further includes:

[0017] If the reference value is greater than the preset threshold, the real-time heat exchange coefficient set of the water chiller is calibrated to obtain a calibrated heat exchange coefficient set; wherein the reference value greater than the preset threshold includes the first sub-reference value greater than the first sub-pre-set threshold, the second sub-reference value greater than the second sub-pre-set threshold, and the third sub-reference value greater than the third sub-pre-set threshold; the real-time heat exchange coefficient set includes condenser heat exchange coefficient, compressor heat exchange coefficient and evaporator heat exchange coefficient;

[0018] The cumulative running time of the water chiller is obtained, and the cumulative running time is compared with a running time threshold;

[0019] If the cumulative running time is less than the running time threshold, the ideal heat exchange coefficient set is updated based on the calibrated heat exchange coefficient set, and an updated ideal heat exchange coefficient set is obtained;

[0020] Or if the cumulative running time is not less than the running time threshold, the actual ideal heat exchange coefficient set is updated based on the calibrated heat exchange coefficient set, and an updated actual heat exchange coefficient set is obtained.

[0021] 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, it includes:

[0022] Based on the updated ideal heat exchange coefficient set, an updated ideal energy efficiency is calculated and obtained;

[0023] Based on the actual heat exchange coefficient set, the actual energy efficiency is calculated and obtained;

[0024] Based on the updated ideal energy efficiency and the actual energy efficiency, a second energy efficiency ratio is calculated and obtained.

[0025] Optionally, after updating the actual ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set and obtaining an updated actual heat exchange coefficient set, it includes:

[0026] Based on the updated ideal heat exchange coefficient set, an updated ideal energy efficiency is calculated and obtained;

[0027] Based on the updated actual heat exchange coefficient set, the updated actual energy efficiency is calculated and obtained;

[0028] Based on the updated ideal energy efficiency and the updated actual energy efficiency, a third energy efficiency ratio is calculated and obtained.

[0029] Embodiments of the present application also provide an energy efficiency evaluation device, comprising:

[0030] The acquisition module is used for acquiring a historical working condition data set, and processing the historical working condition data set to obtain a target working condition data set;

[0031] a comparison module, configured to calculate a reference value based on the target working condition data set, and compare the reference value with a preset threshold value;

[0032] a calculation module, configured to, if the reference value is not greater than the preset threshold value, 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.

[0033] Embodiments of the present application also provide an energy efficiency evaluation system, comprising:

[0034] a data acquisition unit and a data evaluation unit connected in communication;

[0035] the data acquisition unit is configured to acquire and obtain a historical working condition data set;

[0036] the data evaluation unit is configured to process the historical working condition data set to obtain a target working condition data set;

[0037] the comparison module is configured to calculate a reference value based on the target working condition data set, and compare the reference value with a preset threshold value; if the reference value is not greater than the preset threshold value, 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.

[0038] 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, wherein the processor implements the method as described above when executing the computer program.

[0039] Embodiments of the present application also provide a computer readable storage medium, comprising a stored computer program, wherein the computer readable storage medium controls a device where the computer readable storage medium is located to execute the method as described above when the computer program runs.

[0040] Embodiments of the present application have the following technical effects:

[0041] The above technical solutions of the present application have the following advantages: 1) the energy efficiency of the water chiller can be monitored and evaluated in real time without installing a water flow meter, specifically, a first energy efficiency ratio can be calculated based on an actual energy efficiency and an ideal energy efficiency, which is simple and fast.

[0042] 2) the real-time heat exchange coefficient set of the water chiller can be calibrated in real time based on a simulation model.

[0043] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is a structure schematic diagram of an energy efficiency evaluation system provided by an embodiment of the present application;

[0045] Figure 2 is a flow schematic diagram of an energy efficiency evaluation method provided by an embodiment of the present application;

[0046] Figure 3 is a flow schematic diagram of online calibration provided by an embodiment of the present application;

[0047] Figure 4 is a structure schematic diagram of an energy efficiency evaluation device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0048] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0049] As shown in Figure 1 An embodiment of the present application provides an energy efficiency evaluation system, comprising:

[0050] a data acquisition unit 101 and a data evaluation unit 1023 connected in communication;

[0051] The data acquisition unit 101 is configured to acquire and obtain a historical working condition data set.

[0052] The data evaluation unit 1023 is configured to process the historical working condition data set to obtain a target working condition data set.

[0053] A comparison module is configured to calculate a reference value based on the target working condition data set, and compare the reference value with a preset threshold value; if the reference value is not greater than the preset threshold value, calculate an actual energy efficiency based on an actual heat exchange coefficient set of a 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.

[0054] In an optional embodiment of the present application, the data acquisition unit 101 comprises 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 configured to acquire first historical operating condition data of the compressor, and comprises a suction and discharge pressure sensor, a compressor temperature sensor, a power sensor, an inlet guide vane sensor, and the like;

[0055] The second sub-data acquisition unit 101 is configured to acquire second historical operating condition data of the condenser, and comprises a condenser inlet and outlet water temperature sensor, a condenser saturation temperature sensor, and the like;

[0056] The third sub-data acquisition unit 101 is configured to acquire third historical operating condition data of the evaporator, and comprises an evaporator inlet and outlet water temperature sensor, an evaporator saturation temperature sensor, and the like.

[0057] In an optional embodiment of the present application, the data evaluation unit 1023 is obtained based on the edge device 102 (such as a computer or the like), and the data evaluation unit 1023 feeds back the energy efficiency ratio to the edge device 102 after obtaining the energy efficiency ratio. The edge device 102 displays the first energy efficiency ratio based on the display unit 1024 after obtaining the energy efficiency ratio, so as to facilitate the user to obtain the first energy efficiency ratio of each water chiller in real time.

[0058] In the embodiment of the present application, the first energy efficiency ratio is displayed in real time by the display unit 1024 of the edge device 102, so that the user can intuitively see the real-time energy efficiency ratio and the change state of the energy efficiency ratio of each water chiller through the display unit 1024 of the edge device 102, so as to facilitate the staff to determine the energy efficiency attenuation degree of the water chiller according to the real-time energy efficiency ratio, and to formulate a timely maintenance plan according to the attenuation degree, so as to ensure the normal operation of the water chiller and reduce the operation and maintenance cost.

[0059] In an optional embodiment of the present application, the data evaluation unit 1023 comprises a calibration sub-unit 10231 and a calculation sub-unit 10232; the calibration sub-unit 10231 is in communication connection with the calculation sub-unit 10232; the calibration sub-unit 10231 is configured to calibrate the actual heat exchange coefficient set or the ideal heat exchange coefficient set, to correspondingly obtain an updated actual heat exchange coefficient set or an updated ideal heat exchange coefficient set, and to send the updated actual heat exchange coefficient set or the updated ideal heat exchange coefficient set to the calculation sub-module; the calculation sub-module is configured to calculate the first energy efficiency ratio based on the obtained actual heat exchange coefficient set and ideal heat exchange coefficient set, or to calculate the second energy efficiency ratio based on the obtained updated ideal heat exchange coefficient set and actual heat exchange coefficient set, or to calculate the third energy efficiency ratio based on the obtained updated ideal heat exchange coefficient set and updated actual heat exchange coefficient set; the calibration sub-unit 10231 can be realized based on a simulation model.

[0060] An optional embodiment of the present application further comprises a data preprocessing unit 1022, which can be obtained based on the edge device 102, and the data preprocessing unit 1022 is in communication connection with the data evaluation unit 1023; at the same time, the data preprocessing unit 1022 is also in communication connection with the data acquisition unit 101, and the data preprocessing unit 1022 is used for preprocessing the historical working condition data set, obtaining a preprocessing result, and sending the preprocessing result to the calibration subunit 10231 of the data evaluation unit 1023 for subsequent processing.

[0061] An optional embodiment of the present application further comprises a data storage unit 1021, which can be obtained based on the edge device 102, and the data storage unit 1021 is in communication connection with the data acquisition unit 101 and the data preprocessing unit 1022 respectively; wherein the data storage unit 1021 is used for obtaining the historical working condition data set, and storing the historical working condition data set, and then sending the historical working condition data set to the data preprocessing unit 1022 for subsequent processing.

[0062] The embodiment of the present application realizes that the working condition data of each water chiller unit is collected based on the data acquisition unit 101, and the historical working condition data set obtained by collection is processed and calculated based on the multiple units in the edge device 102, so that the energy efficiency ratio of each water chiller unit is obtained in real time.

[0063] As shown in Figure 2 An energy efficiency evaluation method, applied to the system as shown in Figure 1 , comprises:

[0064] Step S21: obtaining a historical working condition data set, and processing the historical working condition data set to obtain a target working condition data set;

[0065] An optional embodiment of the present application, the historical working condition data set comprises first historical working condition data of a compressor, second historical working condition data of a condenser and third historical working condition data of an evaporator.

[0066] Wherein, based on a preset collection time length, and based on the collection time length, the running data of the water chiller unit is collected, and the historical working condition data set is obtained; for example, the preset collection time length is 2 hours, and the historical working condition data set comprises time series data of 2 hours; in addition, the preset collection time length can also be adjusted based on actual needs.

[0067] Further, the first historical working condition data comprises compressor suction and exhaust pressure, suction temperature, power, inlet guide vane opening and rotating speed;

[0068] The second historical working condition data comprises condenser inlet and outlet water temperature and condensation saturation temperature;

[0069] The third historical working condition data includes evaporator inlet and outlet water temperature and evaporator saturation temperature;

[0070] In addition, the historical working condition data set further includes running state data of the chiller and running time of the chiller, wherein the running time of the chiller is cumulative running time.

[0071] In an optional embodiment of the present application, the processing of the historical working condition data set to obtain the target working condition data set comprises:

[0072] The abnormal data in the historical working condition data set is removed, and the historical working condition data corresponding to stable working conditions is retained.

[0073] For example, a preset condenser inlet and outlet water temperature threshold range and a condenser saturation temperature threshold range are set, and when the condenser inlet and outlet water temperature in the second historical working condition data exceeds the condenser inlet and outlet water temperature threshold range, the data corresponding to the condenser inlet and outlet water temperature exceeding the condenser inlet and outlet water temperature threshold range is removed.

[0074] When the condenser saturation temperature in the second historical working condition data exceeds the condenser saturation temperature threshold range, the abnormal data corresponding to the condenser saturation temperature exceeding the condenser saturation temperature threshold range is removed.

[0075] Similarly, the first historical working condition data and the third historical working condition data are preprocessed, and the abnormal data in the first historical working condition data and the third historical working condition data is removed.

[0076] After the preprocessing of the historical working condition data set is completed, the target working condition data set is obtained.

[0077] It should be noted that the preset condenser inlet and outlet water temperature threshold range and the condenser saturation temperature threshold range can be adjusted according to actual needs, and the embodiments of the present application are not limited in detail.

[0078] Step S22: based on the target working condition data set, a reference value is calculated and obtained, and the reference value is compared with a preset threshold value;

[0079] In an optional embodiment of the present application, based on the target working condition data set, a reference value is calculated and obtained, and the reference value is compared with a preset threshold value, comprising:

[0080] The first sub-reference value, the second sub-reference value, and the third sub-reference value are calculated based on the target working condition data set; wherein the reference value includes the first sub-reference value, the second sub-reference value, and the third sub-reference value; the first sub-reference value, the second sub-reference value, and the third sub-reference value are calculated based on the target working condition data set, including: calculating a reference power of the compressor, a first reference temperature difference between the condenser, and a second reference temperature difference between the evaporator based on the target working condition data; obtaining an actual power of the compressor, a first actual temperature difference between the condenser, and a second actual temperature difference between the evaporator; calculating the first sub-reference value based on the reference power and the actual power; calculating the second sub-reference value based on the first reference temperature difference and the first actual temperature difference; and calculating the third sub-reference value based on the second reference temperature difference and the second actual temperature difference.

[0081] The first sub-reference value is compared with a first sub-pre-set threshold value, the second sub-reference value is compared with a second sub-pre-set threshold value, and the third sub-reference value is compared with a third sub-pre-set threshold value; wherein the pre-set threshold value includes the first sub-pre-set threshold value, the second sub-pre-set threshold value, and the third sub-pre-set threshold value.

[0082] In an optional embodiment of the present application, the first sub-reference value can be obtained based on an absolute value of a difference between the reference power and the actual power; the second sub-reference value can be obtained based on an absolute value of a difference between the first reference temperature difference and the second actual temperature difference; and the third sub-reference value can be calculated based on an absolute value of a difference between the second reference temperature difference and the second actual temperature difference.

[0083] The reference power can be calculated based on power data in the target working condition data set, specifically, a pre-set collection time length corresponding to the target working condition data set is obtained, an average power value of the target working condition data set in the pre-set collection time length is calculated, and the average power value is determined as the reference power.

[0084] The first reference temperature difference can be calculated based on actual temperature difference data between the condenser in the target working condition data set; specifically, a pre-set collection time length corresponding to the target working condition data set is obtained, a first average temperature difference between the condenser of the target working condition data set in the pre-set collection time length is calculated, and the first average temperature difference is determined as the first reference temperature difference.

[0085] The second reference temperature difference can be calculated based on actual temperature difference data between the evaporator in the target working condition data set; specifically, a pre-set collection time length corresponding to the target working condition data set is obtained, a second average temperature difference between the evaporator of the target working condition data set in the pre-set collection time length is calculated, and the second average temperature difference is determined as the second reference temperature difference.

[0086] Further, the actual power, the first actual temperature difference and the second actual temperature difference can be obtained based on corresponding sensors respectively.

[0087] Step S23: If the reference value is not greater than the preset threshold, obtaining actual energy efficiency based on the actual heat exchange coefficient set of the water chiller, obtaining ideal energy efficiency based on the ideal heat exchange coefficient set of the water chiller, and obtaining the first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency.

[0088] In an optional embodiment of the present application, if the reference value is not greater than the preset threshold, obtaining actual energy efficiency based on the actual heat exchange coefficient set of the water chiller, obtaining ideal energy efficiency based on the ideal heat exchange coefficient set of the water chiller, and obtaining the first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency, comprises:

[0089] If any one of the following conditions exists: the first sub-reference value is not greater than the first sub-pre-set threshold, the second sub-reference value is not greater than the second sub-pre-set threshold, and the third sub-reference value is not greater than the third sub-pre-set threshold, obtaining actual energy efficiency based on the actual heat exchange coefficient set of the water chiller, obtaining ideal energy efficiency based on the ideal heat exchange coefficient set of the water chiller, and obtaining the first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency.

[0090] In an optional embodiment of the present application, if the first sub-reference value is not greater than the first sub-pre-set threshold, the second sub-reference value is not greater than the second sub-pre-set threshold, and the third sub-reference value is not greater than the third sub-pre-set threshold, obtaining actual energy efficiency based on the actual heat exchange coefficient set of the water chiller, obtaining ideal energy efficiency based on the ideal heat exchange coefficient set of the water chiller, and obtaining the first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency.

[0091] In an optional embodiment of the present application, if the first sub-reference value is not greater than the first sub-pre-set threshold, the second sub-reference value is greater than the second sub-pre-set threshold, and the third sub-reference value is greater than the third sub-pre-set threshold, obtaining actual energy efficiency based on the actual heat exchange coefficient set of the water chiller, obtaining ideal energy efficiency based on the ideal heat exchange coefficient set of the water chiller, and obtaining the first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency.

[0092] In an optional embodiment of the present application, if the first sub-reference value is not greater than the first sub-pre-set threshold, the second sub-reference value is greater than the second sub-pre-set threshold, and the third sub-reference value is not greater than the third sub-pre-set threshold, obtaining actual energy efficiency based on the actual heat exchange coefficient set of the water chiller, obtaining ideal energy efficiency based on the ideal heat exchange coefficient set of the water chiller, and obtaining the first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency.

[0093] The embodiments of the present application can achieve real-time monitoring and real-time evaluation of the energy efficiency of the water chiller without installing a water flow meter. Specifically, a first energy efficiency ratio can be calculated based on the actual energy efficiency and the ideal energy efficiency. The method is simple and fast.

[0094] In an optional embodiment of the present application, as long as any one of the following conditions exists: the first sub-reference value is not greater than the first sub-pre-set threshold value, the second sub-reference value is not greater than the second sub-pre-set threshold value, and the third sub-reference value is not greater than the third sub-pre-set threshold value, the first actual energy efficiency can be calculated based on the currently stored actual heat exchange coefficient set; at the same time, the ideal energy efficiency can be calculated based on the ideal heat exchange coefficient set, without calibrating the actual heat exchange coefficient set of the water chiller.

[0095] In an optional embodiment of the present application, the first sub-pre-set threshold value can be 5%, the second sub-pre-set threshold value can be 5K, and the third sub-pre-set threshold value can also be 5K. The first pre-set threshold value, the second sub-pre-set threshold value, and the third sub-pre-set threshold value can be adjusted in real time according to different water chillers and different working conditions.

[0096] In an optional embodiment of the present application, the first energy efficiency ratio = actual energy efficiency / ideal energy efficiency.

[0097] As shown in Figure 3 an optional embodiment of the present application further includes:

[0098] Step S24: If the reference value is greater than the pre-set threshold value, calibrate the real-time heat exchange coefficient set of the water chiller to obtain a calibrated heat exchange coefficient set; wherein the reference value being greater than the pre-set threshold value includes the first sub-reference value being greater than the first sub-pre-set threshold value, the second sub-reference value being greater than the second sub-pre-set threshold value, and the third sub-reference value being greater than the third sub-pre-set threshold value; the real-time heat exchange coefficient set includes the condenser heat exchange coefficient, the compressor heat exchange coefficient, and the evaporator heat exchange coefficient;

[0099] Step S25: Obtain the cumulative running time of the water chiller and compare the cumulative running time with a running time threshold value;

[0100] Step S26: If the cumulative running time is less than the running time threshold value, update the ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set to obtain an updated ideal heat exchange coefficient set;

[0101] Step S27: Or if the cumulative running time is not less than the running time threshold value, update the actual heat exchange coefficient set based on the calibrated heat exchange coefficient set to obtain an updated actual heat exchange coefficient set.

[0102] The embodiments of the present application can calibrate the real-time heat exchange coefficient set of the water chiller in real time based on the simulation model.

[0103] An optional embodiment of the present application is that when the first sub-reference value is greater than 5%, the second sub-reference value is greater than 5K, and 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.

[0104] An optional embodiment of the present application is that after the calibration of the real-time heat exchange coefficient set based on the simulation model is completed, the cumulative running time of the water chiller is obtained, and the cumulative running time is compared with a running time threshold; the running time threshold can be one week; the running time threshold can be adjusted in real time according to actual needs.

[0105] When the cumulative running time is less than one week, the calibrated heat exchange coefficient set is stored, and the calibrated heat exchange coefficient set is determined as an updated ideal heat exchange coefficient set; or when the cumulative running time is not less than one week, the calibrated heat exchange coefficient set is determined as an updated actual heat exchange coefficient set.

[0106] An optional embodiment of the present application is that the real-time heat exchange coefficient set of the water chiller is updated based on the simulation model, including that the condenser heat exchange coefficient, the compressor heat exchange coefficient, and the evaporator heat exchange coefficient are calibrated based on the simulation model; the calibration method can be adjusting, correcting, or compensating the condenser heat exchange coefficient, the compressor heat exchange coefficient, and the evaporator heat exchange coefficient at the same time.

[0107] An optional embodiment of the present application is that after the ideal heat exchange coefficient set is updated based on the calibrated heat exchange coefficient set and an updated ideal heat exchange coefficient set is obtained, the following steps are included:

[0108] The updated ideal energy efficiency is calculated based on the updated ideal heat exchange coefficient set.

[0109] The actual energy efficiency is calculated based on the actual heat exchange coefficient set.

[0110] The second energy efficiency ratio is calculated based on the updated ideal energy efficiency and the actual energy efficiency.

[0111] An optional embodiment of the present application is that the second energy efficiency ratio = actual energy efficiency / updated ideal energy efficiency.

[0112] An optional embodiment of the present application is that after the actual heat exchange coefficient set is updated based on the calibrated heat exchange coefficient set and an updated actual heat exchange coefficient set is obtained, the following steps are included:

[0113] The updated ideal energy efficiency is calculated based on the updated ideal heat exchange coefficient set.

[0114] The updated actual energy efficiency is calculated based on the updated actual heat exchange coefficient set.

[0115] Based on the updated ideal energy efficiency and the updated actual energy efficiency, a third energy efficiency ratio is calculated.

[0116] In an optional embodiment of the present application, the third energy efficiency ratio = updated actual energy efficiency / updated ideal energy efficiency.

[0117] In an optional embodiment of the present application, the chilled water load is first calculated based on the monitored chilled water flow rate, supply water temperature, and power of the water chiller, and then the energy efficiency ratio is calculated based on the load / power.

[0118] In an optional embodiment of the present application, 1) the actual energy efficiency of the water chiller is compared with the standard to obtain an evaluation result of the current energy efficiency of the water chiller.

[0119] 2) the operation data of the water chiller is collected, the operation data of the water chiller similar to the historical data is selected, the current energy efficiency is compared with the historical energy efficiency to obtain the degree of energy efficiency decay of the water chiller.

[0120] 3) the operation condition of the water chiller is adjusted to be consistent with the product catalog, the energy efficiency of the water chiller under the operation condition is measured, and the current operation state of the water chiller is obtained by comparing the energy efficiency with the data in the product catalog.

[0121] As shown in Figure 4 the embodiment of the present application further provides an energy efficiency evaluation device 40, which comprises:

[0122] an acquisition module 41, 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;

[0123] a comparison module 42, configured to calculate a reference value based on the target working condition data set and compare the reference value with a preset threshold value;

[0124] a calculation module 43, configured to, if the reference value is not greater than the preset threshold value, 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.

[0125] Optionally, the historical working condition data set comprises first historical working condition data of a compressor, second historical working condition data of a condenser, and third historical working condition data of an evaporator.

[0126] Optionally, the calculation of the reference value based on the target working condition data set and the comparison of the reference value with the preset threshold value comprise:

[0127] The first sub-reference value, the second sub-reference value and the third sub-reference value are calculated based on the target working condition data set; wherein the reference value comprises the first sub-reference value, the second sub-reference value and the third sub-reference value; the first sub-reference value, the second sub-reference value and the third sub-reference value are calculated based on the target working condition data set, comprising: the reference power of the compressor, the first reference temperature difference between the condenser and the second reference temperature difference between the evaporator are calculated based on the target working condition data; the actual power of the compressor, the first actual temperature difference between the condenser and the second actual temperature difference between the evaporator are obtained; the first sub-reference value is calculated based on the reference power and the actual power; the second sub-reference value is calculated based on the first reference temperature difference and the first actual temperature difference; the third sub-reference value is calculated based on the second reference temperature difference and the second actual temperature difference;

[0128] The first sub-reference value is compared with the first sub-pre-set threshold value, the second sub-reference value is compared with the second sub-pre-set threshold value, and the third sub-reference value is compared with the third sub-pre-set threshold value; wherein the pre-set threshold value comprises the first sub-pre-set threshold value, the second sub-pre-set threshold value and the third sub-pre-set threshold value.

[0129] Optionally, if the reference value is not greater than the pre-set threshold value, the actual energy efficiency is calculated based on the actual heat exchange coefficient set of the water chiller, the ideal energy efficiency is calculated based on the ideal heat exchange coefficient set of the water chiller, and the first energy efficiency ratio is calculated based on the actual energy efficiency and the ideal energy efficiency, comprising:

[0130] If any one of the following conditions exists: the first sub-reference value is not greater than the first sub-pre-set threshold value, the second sub-reference value is not greater than the second sub-pre-set threshold value, and the third sub-reference value is not greater than the third sub-pre-set threshold value, the actual energy efficiency is calculated based on the actual heat exchange coefficient set of the water chiller, the ideal energy efficiency is calculated based on the ideal heat exchange coefficient set of the water chiller, and the first energy efficiency ratio is calculated based on the actual energy efficiency and the ideal energy efficiency; wherein the actual heat exchange coefficient set comprises the condenser heat exchange coefficient, the compressor heat exchange coefficient and the evaporator heat exchange coefficient.

[0131] Optionally, further comprising:

[0132] If the reference value is greater than the pre-set threshold value, the real-time heat exchange coefficient set of the water chiller is calibrated to obtain a calibrated heat exchange coefficient set; wherein the reference value being greater than the pre-set threshold value comprises the first sub-reference value being greater than the first sub-pre-set threshold value, the second sub-reference value being greater than the second sub-pre-set threshold value, and the third sub-reference value being greater than the third sub-pre-set threshold value; the real-time heat exchange coefficient set comprises the condenser heat exchange coefficient, the compressor heat exchange coefficient and the evaporator heat exchange coefficient.

[0133] obtaining a cumulative running time of the water chiller, and comparing the cumulative running time with a running time threshold;

[0134] if the cumulative running time is less 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;

[0135] or if the cumulative running time is not less than the running time threshold, updating the actual heat exchange coefficient set based on the calibrated heat exchange coefficient set, and obtaining an updated actual heat exchange coefficient set.

[0136] Optionally, after the ideal heat exchange coefficient set is updated based on the calibrated heat exchange coefficient set, and the updated ideal heat exchange coefficient set is obtained, the method comprises:

[0137] calculating an updated ideal energy efficiency based on the updated ideal heat exchange coefficient set;

[0138] calculating the actual energy efficiency based on the actual heat exchange coefficient set;

[0139] calculating a second energy efficiency ratio based on the updated ideal energy efficiency and the actual energy efficiency.

[0140] Optionally, after the actual heat exchange coefficient set is updated based on the calibrated heat exchange coefficient set, and the updated actual heat exchange coefficient set is obtained, the method comprises:

[0141] calculating an updated ideal energy efficiency based on the updated ideal heat exchange coefficient set;

[0142] calculating the updated actual energy efficiency based on the updated actual heat exchange coefficient set;

[0143] calculating a third energy efficiency ratio based on the updated ideal energy efficiency and the updated actual energy efficiency.

[0144] 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, wherein the processor implements the method as described above when executing the computer program.

[0145] Embodiments of the present application also provide a computer readable storage medium comprising a stored computer program, wherein the computer readable storage medium controls a device in which the computer readable storage medium is located to execute the method as described above when the computer program is executed.

[0146] In addition, other configurations and functions of the device of the embodiments of the present application are known to those skilled in the art, and to reduce redundancy, they are not described here.

[0147] It should be noted that the logical and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a list of executable instructions for implementing logic functions, and can 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, or a combination of the above. For the purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-readable medium can be a product of the manufacturing and / or processing, and / or a combination of such products. The computer-readable medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection (electronic) having one or more wires, a portable computer diskette (magnetic), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium can even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, for example, via the optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in the computer memory.

[0148] It should be understood that aspects of the application can be implemented in hardware, software, firmware or a combination thereof. In the above embodiments, various steps or methods can be implemented in software or firmware that is stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any of the following technologies, known in the art, or a combination thereof, can be used: discrete logic circuitry having logic gates for implementing logic functions upon an application of data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), and the like.

[0149] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

[0150] In the description of the application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0151] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0152] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0153] In this application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0154] Although the embodiments of the application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as a limitation of the application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application.

Claims

1. A method of energy efficiency assessment, characterized by, The method comprises the following steps: acquiring a historical working condition data set and processing the historical working condition data set to obtain a target working condition data set; based on the target working condition data set, calculating a reference value and comparing the reference value with a preset threshold, including: based on the target working condition data, calculating a reference power of a compressor, a first reference temperature difference between two ends of a condenser, and a second reference temperature difference between two ends of an evaporator; acquiring an actual power of the compressor, a first actual temperature difference between the two ends of the condenser, and a second actual temperature difference between the two ends of the evaporator; based on the reference power and the actual power, calculating a first sub-reference value; based on the first reference temperature difference and the first actual temperature difference, calculating a second sub-reference value; based on the second reference temperature difference and the second actual temperature difference, calculating a third sub-reference value; comparing the first sub-reference value with a first sub-pre-set threshold, comparing the second sub-reference value with a second sub-pre-set threshold, and comparing the third sub-reference value with a third sub-pre-set threshold; if the reference value is not greater than the preset threshold, calculating an actual energy efficiency based on an actual heat exchange coefficient set of the water chiller, calculating an ideal energy efficiency based on an ideal heat exchange coefficient set of the water chiller, and calculating a first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency, including: if any one of the first sub-reference value being not greater than the first sub-pre-set threshold, the second sub-reference value being not greater than the second sub-pre-set threshold, and the third sub-reference value being not greater than the third sub-pre-set threshold exists, calculating the actual energy efficiency based on the actual heat exchange coefficient set of the water chiller, calculating the ideal energy efficiency based on the ideal heat exchange coefficient set of the water chiller, and calculating the first energy efficiency ratio based on the actual energy efficiency and the ideal energy efficiency; if the reference value is greater than the preset threshold, calibrating a real-time heat exchange coefficient set of the water chiller to obtain a calibrated heat exchange coefficient set; wherein the reference value being greater than the preset threshold includes the first sub-reference value being greater than the first sub-pre-set threshold, the second sub-reference value being greater than the second sub-pre-set threshold, and the third sub-reference value being greater than the third sub-pre-set threshold simultaneously; the real-time heat exchange coefficient set includes a condenser heat exchange coefficient, a compressor heat exchange coefficient, and an evaporator heat exchange coefficient; acquiring a cumulative running time of the water chiller and comparing the cumulative running time with a running time threshold; if the cumulative running time is less than the running time threshold, updating the ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set to obtain an updated ideal heat exchange coefficient set; or if the cumulative running time is not less than the running time threshold, updating the actual heat exchange coefficient set based on the calibrated heat exchange coefficient set to obtain an updated actual heat exchange coefficient set.

2. The method of claim 1, wherein, The historical working condition data set includes first historical working condition data of a compressor, second historical working condition data of a condenser, and third historical working condition data of an evaporator.

3. The method of claim 1, wherein, After updating the ideal heat exchange coefficient set based on the calibrated heat exchange coefficient set to obtain an updated ideal heat exchange coefficient set, the method comprises the following steps: calculating an updated ideal energy efficiency based on the updated ideal heat exchange coefficient set; calculating the actual energy efficiency based on the actual heat exchange coefficient set; calculating a second energy efficiency ratio based on the updated ideal energy efficiency and the actual energy efficiency.

4. The method of claim 1, wherein, After updating the actual heat exchange coefficient set based on the calibration heat exchange coefficient set and obtaining an updated actual heat exchange coefficient set, comprising: calculating an updated ideal energy efficiency based on the updated ideal heat exchange coefficient set; calculating an updated actual energy efficiency based on the updated actual heat exchange coefficient set; calculating a third energy efficiency ratio based on the updated ideal energy efficiency and the updated actual energy efficiency.

5. An energy efficiency evaluation apparatus characterized by comprising: The application of the energy efficiency evaluation method of claim 1, comprising: an acquisition module, 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; a comparison module, configured to calculate a reference value based on the target working condition data set and compare the reference value with a preset threshold value; a calculation module, configured to, if the reference value is not greater than the preset threshold value, calculate an actual energy efficiency based on an actual heat exchange coefficient set of a 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.

6. An energy efficiency assessment system, characterized by, The application of the energy efficiency evaluation method of claim 1, comprising: a data acquisition unit and a data evaluation unit in communication connection; the data acquisition unit, configured to acquire and obtain a historical working condition data set; the data evaluation unit, configured to process the historical working condition data set to obtain a target working condition data set; the comparison module, configured to calculate a reference value based on the target working condition data set and compare the reference value with a preset threshold value; if the reference value is not greater than the preset threshold value, calculate an actual energy efficiency based on an actual heat exchange coefficient set of a 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.

7. An electronic device, comprising: A computer readable storage medium comprising a stored computer program, wherein the computer readable storage medium controls a device in which the computer readable storage medium is located to execute the method of any one of claims 1 to 4 when the computer program is running.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium comprises a stored computer program, wherein the computer readable storage medium controls a device in which the computer readable storage medium is located to execute the method of any one of claims 1 to 4 when the computer program is running.

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