Dual-Path Fluid Routing for Precise Temperature and Pressure Control
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Solution Overview
Problem
Existing systems for controlling the temperature and pressure of fluids in industrial and chemical processes face limitations such as slow dynamic response, limited operating range and accuracy, excessive size, and high cost, as well as issues with overshoot or undershoot in maintaining desired conditions due to factors like parasitic thermal capacitances and pressure swings.
Innovation Solution
A dual-path fluid routing system that independently controls mass flow through two separate paths, using a heat exchanger and flow restriction devices to precisely blend fluids of different temperatures and pressures, allowing for accurate temperature and pressure control at a common outlet node, and a pressure setpoint control system that ensures failsafe operation and minimal leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional pressure control devices are used to control fluid pressure, then pressure regulation can be achieved, but the dynamic response is slow and the operating range is limited
Solution Approach 1:
The patent divides the fluid control system into two separate paths: a main path with a pressure regulator for pressure control and a bypass path with a flow control valve for flow rate control. This segmentation allows independent control of pressure and flow, enabling rapid dynamic response while maintaining a wide operating range that conventional single-path systems cannot achieve.
2Measurement precision
If automated control systems are used to maintain fluid temperature and pressure, then control accuracy can be improved, but the system becomes more complex and expensive
Solution Approach 1:
The patent introduces a control system that receives feedback from temperature and pressure sensors and automatically adjusts the bypass flow rate through the flow control valve. This intermediary control mechanism maintains high accuracy for temperature and pressure while simplifying operation compared to fully automated systems, as the control logic directly relates bypass flow to the needed corrections.
Solution Approach 2:
The system incorporates temperature and pressure sensors that continuously monitor fluid conditions and provide feedback to the control system. This feedback loop enables automatic adjustment of the bypass flow rate to maintain desired temperature and pressure, achieving high control accuracy while keeping the system relatively simple through direct feedback control.
3Adaptability or versatility
If pressure regulators and flow control valves are used together to control temperature and pressure, then control capability is improved, but the system size and cost increase
Solution Approach 1:
The bypass path serves multiple functions: it enables rapid dynamic response, provides fine control of flow rate, and allows the system to operate across a wide range of conditions. By making the bypass path multi-functional, the patent achieves enhanced control capability without proportionally increasing system size, as the same bypass infrastructure supports multiple control objectives.
4Adaptability or versatility
If conventional pressure control devices operate at high pressures, then pressure control range is extended, but safety risks increase especially during power loss
Solution Approach 1:
The system incorporates a failsafe mechanism where the flow control valve automatically closes upon detection of power loss or abnormal conditions. This self-protecting feature ensures that even when operating at extended pressure ranges, the system automatically enters a safe state without requiring external intervention, maintaining reliability while expanding operational capabilities.
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
The dual-path system provides enhanced temperature and pressure control resolution, rapid dynamic response, and cost-effective operation over a wide pressure range, while the pressure setpoint control system ensures reliable and safe operation by minimizing leakage and handling power failures.
Implementation Method 1
The fluid routing system may include a heat exchanger that heats or cools the fluid flowing through one of the paths.
Implementation Method 2
The bypass path may include a flow restriction device
Data Source
AI summary
Systems and methods for using a dual-path fluid routing system that uses a flow restriction device to enhance temperature and pressure control of fluid are provided. Systems and methods for using a setpoint pressure control system to accurately control the setpoint pressure of a regulator are also provided.