Predictive Compressor Room Control for Variable Air Demand
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Solution Overview
Problem
Existing compressor control systems operate based solely on the current state, lacking predictive capabilities, leading to suboptimal control and higher energy costs.
Innovation Solution
A method that estimates the current state of the compressed air or gas system, predicts future process variables, samples these predictions based on system volume, and uses model predictive control to generate action and state profiles over defined time horizons to optimize compressor operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If compressors are controlled based solely on current state, then control simplicity is maintained, but energy efficiency deteriorates
Solution Approach 1:
The control system performs preliminary actions by predicting future compressed air consumption and proactively adjusting compressor operations before the actual demand occurs. The predictive controller estimates future states and pre-adjusts compressor output, avoiding reactive control that would cause inefficiencies. This resolves the contradiction by maintaining simple control implementation while dramatically improving energy efficiency through forward-looking decision-making.
Solution Approach 2:
The system implements feedback by continuously monitoring actual compressed air consumption and comparing it with predicted consumption. The predictive controller uses this feedback to refine future predictions and adjust compressor operations in real-time. This closed-loop feedback mechanism enables the system to maintain control simplicity while achieving superior energy efficiency compared to open-loop control methods.
2Use of energy by moving object
If predictive control is implemented, then energy efficiency improves, but system complexity increases
Solution Approach 1:
The patent replaces complex mechanical control systems with a computational predictive control algorithm. Instead of using elaborate mechanical sensors, actuators, and control mechanisms, the system uses software-based prediction and optimization. This substitution maintains or improves energy efficiency while actually reducing overall system complexity by eliminating the need for complex hardware control architectures.
Solution Approach 2:
The predictive control system is designed to be self-sufficient, using historical data and system parameters to automatically generate control decisions without requiring complex external intervention or manual configuration. The system serves itself by continuously learning from past performance and autonomously optimizing compressor operations, thereby improving energy efficiency without proportionally increasing operational complexity.
3Ease of manufacture
If compressors are switched on/off sequentially based on predefined pressure values, then control implementation is simple, but control optimality deteriorates
Solution Approach 1:
The system changes the fundamental control parameter from simple pressure thresholds to predictive consumption forecasts. Instead of switching compressors based on fixed pressure setpoints, the predictive controller uses estimated future consumption patterns to determine optimal switching times. This parameter transformation maintains implementation simplicity while dramatically improving control optimality and overall system productivity.
Solution Approach 2:
The control system transitions from static, predefined pressure-based switching to dynamic, prediction-based decision-making. The predictive controller continuously adapts compressor switching decisions based on real-time system state and forecasted demand, enabling optimal control that responds to changing conditions while maintaining straightforward implementation through algorithmic decision rules.
Data Source
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AI summary
According to an embodiment, a computer-implemented method for controlling a compressed air or gas system (113) is disclosed comprising the steps of estimating (202) a current state, predicting (203) a future process variable profile (225) based on the current state (211), sampling (204) the future process variable profile by a sampling method having a sampling frequencies based on a volume (107) of the compressed air or gas system (113),transforming (205) by a model predictive control, MPC, method the sampled future process variable profile and the current state into an action profile and a state profile, and instructing the compressors to perform the actions in accordance with the action profile thereby controlling the compressed air or gas system (113) .