Variable-Resistance Conduit for Stable Fluid Phase Transition
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Solution Overview
Problem
Existing devices for controlling the phase transition of fluids between liquid and vapor states are unstable and require complex systems with moving parts, leading to wear and maintenance issues, and often rely on external energy sources or carrier gases.
Innovation Solution
A device with a conduit having varying resistance to flow, controlled by temperature and pressure, allows for precise control of the phase transition location within the conduit, eliminating the need for moving parts and external energy sources by adjusting the resistance to flow along the conduit axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating or pressure reduction is used to vaporize liquid, then phase transition can be achieved, but the process becomes unstable and requires additional equipment like pumps, valves, and heaters
Solution Approach 1:
The patent changes the flow resistance parameter along the conduit length, creating a gradient that naturally controls the phase transition location. By varying the flow resistance without moving parts, the system achieves stable vaporization or condensation at controlled positions within the conduit, eliminating the need for complex valve and pump systems.
Solution Approach 2:
The patent extracts and eliminates the need for moving parts such as pumps, valves, and heaters by using a stationary conduit with varying flow resistance. The phase transition control is achieved through the inherent flow dynamics created by the resistance gradient, removing unreliable mechanical components from the system.
2Productivity
If carrier gas is added to reduce partial pressure and encourage vaporization, then phase transition is enhanced, but the device requires additional equipment with moving parts
Solution Approach 1:
Instead of adding carrier gas to enhance vaporization, the patent changes the flow resistance parameter along the conduit. This creates a pressure gradient that naturally drives the phase transition without requiring additional gas supply equipment or moving parts, maintaining high productivity while simplifying the device.
3Speed
If the change of state occurs at the edge of the conduit, then the process is faster, but edge effects reduce stability
Solution Approach 1:
The patent applies local quality by creating different flow resistance characteristics at different locations along the conduit. The varying resistance gradient ensures that the phase transition occurs at an optimal internal position rather than at the edge, balancing the speed of transition with the stability needed for reliable operation.
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 approach provides a stable and controllable phase transition, reducing edge effects and allowing for precise control of mass flow rates without the need for pumps, valves, or heaters, resulting in a reliable and low-maintenance system.
Implementation Method 1
a liquid will change to a vapour when its vapour pressure becomes equal to or exceeds the external pressure acting on the liquid
Implementation Method 2
As a liquid changes to a vapour it absorbs energy from its surroundings. Similarly when a vapour condenses it releases energy to its surroundings and the temperature rises
Implementation Method 3
a conduit which has a changing resistance to flow and controlling the temperature and/or pressure of the fluid while the resistance to flow is changing provides a device where the location at which the change of state occurs can be confined
Data Source
AI summary
A device and method for changing a fluid from one state to another state, the states comprising a liquid and a vapour state are disclosed. The device comprises: an inlet (1) configured to receive the fluid in a first state; an outlet (8) configured to output the fluid in a second state; and a conduit (2) connecting the inlet to the outlet. The conduit is configured such that a resistance to flow changes along at least a portion of a flow axis within the conduit. The device further comprises a controller (7) configured to control a location of a region within the portion of the conduit in which the fluid changes state by controlling at least one of a temperature of the fluid and a pressure at at least one of the inlet and the outlet.