Compressor Diagnostic Indicators via Dimensional Analysis
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Solution Overview
Problem
Current diagnostic methods for refrigerant compressors are impaired by changing operating and environmental influences, leading to reduced accuracy and increased analysis time due to reliance on single parameters, necessitating the use of multiple diagnostic parameters which complicates the diagnostic process.
Innovation Solution
The method involves detecting diagnostic parameter values of at least two parameters, calculating diagnostic metric values using similarity theory and dimensional analysis, comparing these values to reference values, and adjusting operating conditions based on the comparison, thereby forming diagnostic key figures that account for physical laws and reduce analysis effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple diagnostic parameters are used to improve accuracy, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent combines multiple diagnostic parameters (temperature, pressure, speed) into a single composite diagnostic indicator through dimensional analysis and similarity theory. This merging approach maintains the information content of multiple parameters while simplifying the diagnostic process to a single indicator evaluation, directly resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The patent transforms multiple physical parameters with different dimensions into a dimensionless diagnostic indicator through dimensional analysis. By changing the parameter representation from dimensional quantities to dimensionless groups, the system maintains diagnostic accuracy while reducing complexity in data processing and analysis.
2Measurement precision
If multiple diagnostic parameters are analyzed simultaneously, then measurement precision improves, but loss of time increases
Solution Approach 1:
The patent merges multiple diagnostic parameters into a single composite indicator through dimensional analysis, reducing the analysis process from evaluating multiple parameters simultaneously to evaluating one indicator. This significantly reduces analysis time while preserving the diagnostic accuracy that would require multiple parameters.
Solution Approach 2:
The patent performs preliminary transformation of multiple parameters into a dimensionless diagnostic indicator before actual diagnostic evaluation. This preliminary action consolidates the information processing workload, allowing rapid assessment without the need to analyze multiple parameters in detail during the diagnostic phase.
3Device complexity
If single-parameter diagnostic algorithms are used, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent changes the parameter representation from single dimensional quantities to dimensionless composite indicators through dimensional analysis. This transformation allows the system to maintain the simplicity of single-parameter algorithms while incorporating the information content of multiple parameters, thus improving diagnostic accuracy without increasing operational complexity.
Solution Approach 2:
The patent creates a universal diagnostic indicator that can evaluate compressor condition across different operating conditions and environmental factors. This single indicator serves multiple diagnostic functions that would otherwise require separate parameter analyses, improving accuracy while maintaining algorithm simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy of compressor condition assessment, increases the probability of predicting damage conditions, and allows for proactive maintenance planning by combining multiple diagnostic parameters into informative diagnostic indicators that account for operating and environmental influences.
Implementation Method 1
Calculating at least one diagnostic indicator value from the diagnostic parameter values using similarity theory and dimensional analysis
Implementation Method 2
Calculating at least one diagnostic indicator value from the diagnostic parameter values using similarity theory and dimensional analysis
Data Source
AI summary
The invention relates to a method for operating a refrigerant compressor, in particular a speed-controlled refrigerant compressor. The invention is characterized by the steps of: acquiring diagnostic parameter values of at least two diagnostic parameters characterizing the operation of the refrigerant compressor; calculating at least one diagnostic indicator value from the diagnostic parameter values using similarity theory with the aid of dimensional analysis; comparing the diagnostic indicator value with at least one reference value; and changing at least one operating condition depending on the result of the comparison. The invention also relates to a refrigerant compressor system with a refrigerant compressor, in particular a speed-controlled one, wherein the system comprises means for carrying out the method according to the invention.