Refrigeration Plant Multi-Point Regulation for Compressor Safety
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Solution Overview
Problem
Refrigeration plants face inefficiencies and safety concerns due to the limitations of existing regulation methods, particularly in complex systems with dynamic variables and interdependent devices, where single-point control can lead to unsatisfactory operating conditions.
Innovation Solution
A regulation apparatus and method that compares regulation requests at multiple points along the fluid path of a refrigeration plant, using sensors and calculation units to determine the most suitable regulation request based on deviations from set points, thereby optimizing compressor operation and ensuring safer, more efficient control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If single-point regulation control is used in refrigeration plants, then the control system is simple and easy to operate, but the safety and efficiency are reduced due to inability to account for dynamic variations in multiple interdependent variables
Solution Approach 1:
The regulation system is segmented into multiple independent regulation requests, each responsible for controlling a specific physical quantity (suction pressure, discharge pressure, evaporator temperature, condenser temperature) at different locations in the refrigeration cycle. Each segment operates autonomously with its own sensor and control logic, yet collectively they provide comprehensive system-wide regulation that enhances safety without sacrificing operational simplicity.
2Reliability
If multiple regulation requests are implemented to control different physical quantities at different points, then the safety and efficiency are improved, but the device complexity increases
Solution Approach 1:
Each regulation request operates autonomously, self-regulating its specific parameter based on feedback from its dedicated sensor. The regulation device automatically selects the most appropriate regulation request based on current operating conditions without requiring complex external coordination or intervention, thereby maintaining simplicity while achieving enhanced safety through multiple controlled variables.
3Productivity
If proportional regulation is used to provide continuous control response, then the dynamic behavior and regulation quality are improved, but the system may expose the plant to operating conditions with reduced safety under certain conditions
Solution Approach 1:
The system dynamically changes the active regulation parameter based on operating conditions. Different physical quantities (pressure, temperature) are regulated depending on the specific operating state of the refrigeration plant. This allows the system to maintain high regulation quality through continuous proportional control while ensuring safety by selecting appropriate regulation targets suited to current conditions, avoiding unsafe operating states.
Data Source
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AI summary
A regulation apparatus (50) for a refrigeration plant is disclosed. At least one refrigerant fluid path and a plurality of devices arranged along said refrigerant fluid path are defined in the refrigeration plant. The regulation apparatus includes a first sensor designed to be arranged in a first point (P1) along the refrigerant fluid path of the refrigeration plant, a second sensor (33) designed to be arranged in a second point (P3) along the fluid path of the refrigeration plant, a control unit and an actuation device for actuating at least one compressor (12) of the refrigeration plant. The control unit is configured to control a first value measured by said first sensor (31) and to obtain a first regulation request of said at least one device (12) of the refrigeration plant deriving from said first measured value. The control unit is configured to control a second value measured by said second sensor (33) and derive a second regulation request of said at least one compressor (12) of the refrigeration plant deriving from said second measured value, compare the first regulation request with the second regulation request, and establish which regulation request is greater between the first regulation request and the second regulation request, and wherein said control unit is designed to command the actuation device to actuate the most effective regulation request of said at least one compressor (12) of the refrigeration plant.