Compressor Test Rig Throttling for Pressure Ratio Control
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Solution Overview
Problem
Conventional methods for validating compressor operation in power generation systems are costly and time-consuming, requiring evaluation over a wide range of operational test points.
Innovation Solution
Modulating the discharge area of the compressor using a computer processor with executable instructions to control the compressor pressure ratio, employing various control modes such as closed loop pressure ratio control, manual control, and dynamic control, to simulate compressor operation with a turbine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional validation methods are used to evaluate compressor operation over a wide range of operational test points, then comprehensive validation is achieved, but the process becomes expensive and time-consuming
Solution Approach 1:
The patent changes the operating parameters by maintaining a constant compressor pressure ratio (CPR) while varying other parameters such as flow rate and power consumption. This allows comprehensive validation to be achieved by testing at different flow rates while keeping CPR constant, thereby reducing the number of test points needed and shortening validation time without compromising validation completeness
Solution Approach 2:
The validation process is segmented into multiple constant CPR test points rather than requiring evaluation across a continuous wide range of operational points. By dividing the validation into discrete constant CPR segments (e.g., CPR = 2.0, 2.5, 3.0), the patent achieves comprehensive validation more efficiently, reducing both time and cost while maintaining reliability
2Reliability
If conventional validation methods are used to evaluate compressor operation over a wide range of operational test points, then comprehensive validation is achieved, but the cost increases
Solution Approach 1:
The patent changes the approach by validating compressor performance at constant pressure ratios rather than across a wide range of varying pressure ratios. This parameter change reduces the complexity of testing and the number of test points required, thereby lowering validation costs while maintaining comprehensive validation through systematic testing at different constant CPR values
Solution Approach 2:
The validation is segmented into discrete constant CPR test points, which simplifies the testing procedure and reduces the overall cost. By testing at specific segmented CPR values (e.g., 2.0, 2.5, 3.0) rather than continuously varying parameters, the patent achieves cost-effective validation without sacrificing completeness
3Manufacturing precision
If the discharge area is modulated to control compressor pressure ratio, then precise pressure ratio control is achieved, but the system complexity increases
Solution Approach 1:
The patent introduces a modulating device (throttle valve or variable geometry mechanism) as an intermediary component between the compressor discharge and the system outlet. This intermediary allows precise control of the discharge area to maintain constant pressure ratio, achieving high control precision while isolating the complexity to a specific component rather than the entire system
Solution Approach 2:
The control system uses feedback from pressure sensors to continuously monitor the compressor pressure ratio and automatically adjusts the discharge area through the modulating device. This feedback mechanism achieves precise pressure ratio control while automating the process, reducing the need for complex manual control systems
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
Facilitates efficient and cost-effective validation of compressor operation by controlling the discharge area, allowing for precise simulation and operation at predefined compressor pressure ratios, thereby improving the efficiency and productivity of power generation systems.
Implementation Method 1
modulating a discharge area of the compressor... to achieve a desired compressor pressure ratio
Data Source
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AI summary
Certain embodiments of the disclosure may include systems, methods and apparatus for operating and validating a compressor. According to an example embodiment of the disclosure, a method is provided for validating compressor operation. The method can include receiving compressor operating parameter data from a plurality of sensors; and adjusting a portion of a variable flow area downstream of a compressor discharge to achieve a desired compressor pressure ratio.