Compressed Air Facility Autonomous Control
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Solution Overview
Problem
Existing compressed air production facilities face high extension costs and operational disruptions when adding new air compressors to meet increased demand, as they require new communication lines and involve stopping operating compressors.
Innovation Solution
A compressed air production facility with air compressors connected via air tanks, featuring an adjusting unit that sets a pressure setpoint and a control unit that adjusts compressor rotational frequency based on pressure, allowing for autonomous operation without a centralized controller, reducing the need for communication lines and enabling seamless addition of new compressors without stopping existing ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a centralized controller is used to control multiple air compressors via communication lines, then the compressors can be controlled to operate or stop in response to demand changes, but the extension cost increases due to required communication line installation and controller setting work
Solution Approach 1:
The patent divides the control function from the compression function by introducing independent control units for each air compressor. Each control unit autonomously manages its associated compressor based on tank pressure, eliminating the need for a centralized controller and communication infrastructure. This segmentation resolves the contradiction by maintaining adaptability through distributed control while removing the complex communication line requirement.
Solution Approach 2:
Each air compressor system performs self-control through its dedicated control unit that automatically adjusts compressor operation based on real-time tank pressure measurements. The control unit independently determines when to start, stop, or adjust compressor speed without external commands, enabling the system to respond to demand changes autonomously. This self-service mechanism eliminates the need for centralized control infrastructure while preserving adaptive response capability.
2Productivity
If new air compressors are added to cope with increased demand, then the compressed air supply capacity increases, but operational disruptions occur due to requiring stoppage of operating compressors during installation
Solution Approach 1:
The patent creates independent control zones for each air compressor through dedicated control units and associates each compressor with its own air tank. This segmentation allows new compressors to be added to the system without affecting the operation of existing compressors, as each unit operates autonomously. The modular architecture enables seamless integration of new capacity while maintaining continuous operation of existing equipment, eliminating installation downtime.
Solution Approach 2:
The control unit is pre-configured with control algorithms and pressure threshold settings before the compressor is installed and connected to the system. This preliminary configuration allows the new compressor to be immediately integrated into the distributed control network upon installation, without requiring system-wide controller stoppage or reconfiguration. The pre-programmed autonomy enables plug-and-play addition of new compressors.
3Reliability
If a centralized controller is used for controlling air compressors, then coordinated operation is achieved, but the facility cost increases due to controller setting work and communication infrastructure
Solution Approach 1:
Each control unit autonomously monitors its associated air tank's pressure level and independently decides when to start, stop, or adjust the speed of its compressor. The control units share information about system state through simple pressure measurements rather than complex communication protocols. This self-service approach maintains coordinated operation through natural system equilibrium while eliminating the need for expensive centralized controller infrastructure and setting work.
Solution Approach 2:
The air tank pressure serves as a natural intermediary that mediates coordination between multiple independent compressors. Instead of requiring direct communication between controllers, the pressure in the shared air distribution system acts as a common signal that all control units respond to. This intermediary mechanism enables coordinated operation without complex communication infrastructure, as each control unit independently reacts to the same physical parameter (pressure) that reflects overall system demand.
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 solution reduces extension costs and maintains operational efficiency by allowing new compressors to be added without stopping existing ones, effectively managing pressure setpoints to match demand fluctuations.
Implementation Method 1
an air compressor that compresses air
Implementation Method 2
a control unit that operates a rotational frequency of the air compressor on the basis of the pressure setpoint adjusted by the adjusting unit and a pressure of the air tank
Implementation Method 3
the adjusting unit adjusting the pressure setpoint on the basis of a control variable indicating the rotational frequency of the compressor or the pressure of the air tank
Data Source
AI summary
A compressed air production facility that reduces an extension cost without stopping an operating air compressor in a case of increasing the number of air compressors to cope with an increase in demands for compressed air is provided. A compressed air system supplies compressed air to compressed air consuming devices connected to a compressed air distributions line, the compressed air system including a plurality of air compressor units connected to the compressed air distributions line via respective air tanks. Each of the air compressor units includes: an air compressor main body; an adjustor of pressure setpoint that adjusts a pressure setpoint of an air tank to which the air compressor unit including the adjustor of pressure setpoint is connected; and a controller of air compressor that operates a rotational frequency of the air compressor main body on the basis of the pressure setpoint adjusted by the adjustor of pressure setpoint and a pressure of the air tank. The adjustor of pressure setpoint adjusts the pressure setpoint on the basis of a control variable indicating the rotational frequency of the air compressor main body or the pressure of the air tank.