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Method of surge protection for a dynamic compressor using a surge parameter

a dynamic compressor and surge protection technology, applied in the field of dynamic compressors, can solve the problems of inability to measure the volumetric flow and the polytropic head in practice, the amount of gas that passes through the compressor, and damage to the compressor

Inactive Publication Date: 2011-11-17
ENERGY CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method for protecting a dynamic compressor from surges, which can damage the compressor. The method involves calculating certain parameters and using them to create a surge limit line on the compressor map. A control system then adjusts an anti-surge valve based on the distance between the control parameter and the surge limit line, which changes as the compressor load changes. The technical effect of this method is to prevent surges and protect the dynamic compressor from damage.

Problems solved by technology

The technical problem addressed in this patent is how to effectively prevent damage to dynamic compressors caused by surges without being affected by variable factors like gas compositions or temperature fluctuations. Existing solutions based on static maps or constant pressure ratios may no longer work well enough due to changing circumstances during normal operational loads.

Method used

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  • Method of surge protection for a dynamic compressor using a surge parameter
  • Method of surge protection for a dynamic compressor using a surge parameter
  • Method of surge protection for a dynamic compressor using a surge parameter

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Embodiment Construction

[0015]FIG. 1 shows a dynamic compressor 10 that includes a compressor 12 that is driven by a compressor driver 14. The compressor driver is of any type including a motor, gas turbine, steam turbine, expander or the like. The compressor 12 has a gas inlet 16 and a gas outlet 18 wherein gas flows through the compressor 12 to be compressed. An anti-surge or recycle valve 20 is fluidly connected between the gas inlet 16 and gas outlet 18 so that when the anti-surge valve 20 opens a fluid flow path exists to convey gas from the gas outlet 18 to the gas inlet 16. A plurality of sensors 22 including pressure sensors, temperature sensors, flow measurement sensors and the like are placed throughout the dynamic compressor 10 in order to determine processed conditions for the components of the dynamic compressor including the compressor 12, the driver 14, the gas inlet 16, and gas outlet 18 and the anti-surge valve 20. The plurality of sensors 22 are electrically connected to the control syste...

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Abstract

A method of surge protection for a dynamic compressor that has a corresponding compressor map. A control system continually calculates an equivalent polytropic head parameter in order to define a surge limit line. The system then calculates a control parameter and determines the distance the control parameter to the surge limit line wherein the control parameter is dynamic to changes in compressor load and invariant to changes in suction conditions and gas compressibility. As a result of the distance of the control parameter to the surge limit line, the surge valve of a dynamic compressor is actuated to prevent surge.

Description

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Claims

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Application Information

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Owner ENERGY CONTROL TECH
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