Reciprocating Compressor Suction Valve Load Control
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Solution Overview
Problem
Gas compression systems face challenges in managing engine load variability, leading to increased unscheduled maintenance and reduced efficiency when configured to operate aggressively, and reduced revenue and efficiency when configured conservatively, especially in remote locations where maintenance is costly and inconvenient.
Innovation Solution
A method and system that control the suction valve of a reciprocating compressor based on engine load thresholds, dynamically adjusting the valve to reduce gas flow and thereby manage engine load, using a controller to monitor parameters and adjust operations to prevent excessive load and maintain system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the engine and gas compressor are configured to operate aggressively to increase revenue and system efficiency, then productivity and energy use are improved, but reliability deteriorates due to increased unscheduled maintenance events
Solution Approach 1:
The patent implements dynamic control of the suction valve that adjusts its opening degree based on real-time engine load conditions. The controller continuously monitors engine parameters and dynamically modulates the suction valve to maintain optimal operating conditions, transitioning the system from static conservative/aggressive configurations to dynamic adaptive operation that balances productivity and reliability
Solution Approach 2:
The system employs feedback control by continuously monitoring engine load parameters and using this information to adjust the suction valve position. The controller receives feedback about engine operating conditions and automatically modulates the suction valve to prevent excessive load conditions that would trigger unscheduled maintenance, while maximizing productive operation within safe parameters
2Reliability
If the engine and gas compressor are configured conservatively to reduce unscheduled maintenance events, then reliability is improved, but productivity and revenue deteriorate
Solution Approach 1:
The dynamic suction valve control enables the system to operate at higher loads when conditions permit, increasing revenue-generating productivity while maintaining reliability through automatic load management. The system adapts in real-time rather than operating conservatively at fixed low-load settings
Solution Approach 2:
The system changes operational parameters by dynamically adjusting the suction valve opening degree based on engine load conditions. This allows the system to optimize the balance between productivity and reliability by varying the intake flow parameter in response to real-time operating conditions rather than maintaining fixed conservative settings
3Reliability
If the suction valve is controlled to reduce gas flow when engine load is high, then engine load is reduced to prevent overload, but productivity decreases due to reduced gas flow
Solution Approach 1:
The suction valve control operates in periodic cycles, alternating between allowing full gas flow during acceptable load conditions and reducing flow when load thresholds are approached. This periodic modulation maintains engine reliability by preventing sustained overload while maximizing gas flow productivity during optimal operating windows
Solution Approach 2:
The system applies partial action by closing the suction valve only to the extent necessary to prevent engine overload, rather than maintaining consistently reduced flow. The valve modulation provides just enough restriction to manage engine load while allowing maximum possible gas flow during acceptable operating conditions
Data Source
AI summary
A method of controlling a gas compression system includes comparing an engine load of an engine of the gas compression system during operation to a load threshold and controlling a suction valve coupled to an intake of a reciprocating compressor. The suction valve is controlled based at least in part on the comparison of the engine load to the load threshold. Controlling the suction valve includes incrementing the suction valve toward a closed position to reduce flow of a gas into the intake when the engine load is greater than or equal to the load threshold.