Water chilling unit digital twin model construction method and device, terminal and storage medium

A technology for chillers and construction methods, which is applied in the directions of instruments, electrical testing/monitoring, control/regulation systems, etc., can solve the problems of poor synchronization between virtual and real chillers and low fidelity of digital models, so as to achieve a consistent synchronization between virtual and real. Effect

Active Publication Date: 2022-02-25
PENG CHENG LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a method, device, terminal and storage medium for constructing a digital twin model of

Method used

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  • Water chilling unit digital twin model construction method and device, terminal and storage medium
  • Water chilling unit digital twin model construction method and device, terminal and storage medium
  • Water chilling unit digital twin model construction method and device, terminal and storage medium

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Experimental program
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Effect test

Embodiment 1

[0068] Such as figure 1 As shown, in an embodiment of the digital twin model construction method of the chiller, the steps are:

[0069] S100. Construct a digital twin model family of the chiller based on multi-field data of the chiller, wherein the digital twin model family includes a three-dimensional geometric model, a performance degradation model, a mechanism simulation model, and a functional block diagram model.

[0070] Specifically, the multi-field data of the chiller includes data in the mechanical, control, fluid, and thermodynamic fields of the chiller, including actual operating data, empirical formulas, and empirical parameters. In this embodiment, multiple models are constructed according to the data of the chiller in multiple fields. Such as figure 2 As shown, first construct a model based on the prior knowledge of the chiller, then identify the constructed model based on the actual operating data of the chiller, and update the parameters of the model so tha...

Embodiment 2

[0150] Based on the above embodiments, the present invention also provides a corresponding digital twin model building device for chillers, such as Figure 10 As shown, the device includes:

[0151] A model building module, the model building module is used to construct the digital twin model family of the chiller based on the multi-field data of the chiller, wherein the digital twin model family includes a three-dimensional geometric model, a performance degradation model, and a mechanism A simulation model and a schematic block diagram model, specifically as described in Embodiment 1;

[0152] A feature extraction module, the feature extraction module is used to extract the operating characteristics of the chiller according to the monitoring data of the chiller, specifically as described in Embodiment 1;

[0153] A virtual-real synchronization module, the virtual-real synchronization module is used to identify the models in the digital twin model family by using the recursi...

Embodiment 3

[0155] Based on the above embodiments, the present invention also provides a corresponding terminal, such as Figure 11 As shown, the terminal includes a processor 10 and a memory 20 . Figure 11 Only some components of the terminal are shown, but it should be understood that implementation of all illustrated components is not required, and more or fewer components may be implemented instead.

[0156] The storage 20 may be an internal storage unit of the terminal in some embodiments, such as a hard disk or memory of the terminal. In other embodiments, the memory 20 may also be an external storage device of the terminal, such as a plug-in hard disk equipped on the terminal, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD ) card, flash memory card (Flash Card), etc. Further, the memory 20 may also include both an internal storage unit of the terminal and an external storage device. The memory 20 is used to store application software and vario...

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Abstract

The invention discloses a water chilling unit digital twinborn model construction method and device, a terminal and a storage medium, and the method comprises the steps: constructing a digital twinborn model family of a water chilling unit based on the data of the water chilling unit in multiple fields, the digital twinborn model family comprising a three-dimensional geometric model, a performance degradation model, a mechanism simulation model and a principle block diagram model; extracting operation characteristics of the water chilling unit according to the monitoring data of the water chilling unit; and according to the operation characteristics and the output of each model in the digital twin model family, carrying out online recursive identification on the models in the digital twin model family by adopting a recursive maximum likelihood method, and carrying out real-time updating on parameters of the models in the digital twin model family so as to realize virtual-real synchronization. According to the method, the water chilling unit is modeled from multiple fields, the parameters of the model are updated in real time according to actual monitoring data in the operation process of the water chilling unit, the actual operation mechanism and characteristics can be truly and reliably described, and virtual-real consistency synchronization of the digital model and the water chilling unit is achieved.

Description

technical field [0001] The invention relates to the technical field of chiller maintenance, in particular to a method, device, terminal and storage medium for constructing a digital twin model of a chiller. Background technique [0002] The chiller is the core cooling and main energy consumption equipment of public buildings. The chiller mainly includes compressors, evaporators, condensers, expansion valves and functional auxiliary components; its working process is a coupling of mechanical, electrical, control, fluid and thermodynamics. Composed of phase change systems, and there is a large time-lag characteristics. Due to the existence of the above-mentioned complex characteristics, the accurate digital model of the chiller is lacking, which leads to the maintenance personnel of the chiller not knowing its mechanism clearly, and the chiller that is not maintained in time often runs with faults or suboptimal operation. [0003] Most of the existing chiller modeling methods...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0262G05B2219/24065
Inventor 骆伟超桂卫华陈志文阳春华蒋朝辉唐鹏任浩曹婷张超波
Owner PENG CHENG LAB
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