Heat Exchanger Flow Control to Reduce Wear and Cycling
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Solution Overview
Problem
Conventional heat exchanger systems face inefficiencies in temperature control due to independent control loops, leading to increased wear and system cycling, which affects performance and lifespan.
Innovation Solution
A coordinated flow control method and system that utilizes a variable actuator and a discrete actuator, controlled by a controller to adjust their positions within predetermined ranges, ensuring efficient heat exchange by minimizing errors between desired and actual temperatures, thereby reducing system wear and cycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If independent control loops are used to control fluid flows in heat exchanger systems, then each control loop can operate autonomously, but system wear increases and cycling frequency increases
Solution Approach 1:
The patent combines multiple independent control loops into a coordinated control system where a master controller synchronizes the operation of multiple actuators. This merging approach maintains the autonomous control capability of each loop while reducing overall system cycling by coordinating actuator operations to avoid frequent switching, thereby reducing wear and improving reliability.
Solution Approach 2:
The system dynamically adjusts actuator positions based on real-time temperature measurements and coordinated control algorithms. The master controller continuously monitors system state and optimizes actuator positions to maintain temperature stability while minimizing cycling frequency, allowing the system to adapt dynamically without excessive wear.
2Measurement precision
If multiple independent controllers are used to control valves and fans, then each component can be precisely controlled, but temperature control accuracy decreases due to lack of coordination
Solution Approach 1:
The coordinated control system implements a feedback mechanism where the master controller continuously monitors temperature measurements from sensors and adjusts actuator positions accordingly. This feedback loop ensures that while individual components maintain their control precision, the overall system achieves improved temperature control accuracy by coordinating all actuators based on real-time temperature data and minimizing the error between desired and actual temperatures.
3Device complexity
If conventional independent control loops are used, then system complexity is low with separate controllers, but energy consumption increases and heat transfer efficiency decreases
Solution Approach 1:
The master controller performs preliminary coordination of actuator positions based on predicted system state and temperature requirements. By pre-coordinating actuator positions and optimizing their operation sequences, the system reduces energy consumption and improves heat transfer efficiency without significantly increasing control system complexity. The coordinated approach allows actuators to operate in an optimized sequence rather than independently, reducing redundant energy expenditure.
Data Source
AI summary
A method of coordinated flow control in a heat exchanger system includes adjusting a position of a variable actuator of the heat exchanger system if an associated monitored temperature of the heat exchanger system needs adjustment, determining if the adjusted position of the variable actuator is within a predetermined range of positions, adjusting a position of a discrete actuator of the heat exchanger system if the adjusted position of the variable actuator is not within the predetermined range of positions, and resetting the position of the variable actuator in response to adjusting the position of the discrete actuator.