SMA Valve Actuator for Temperature-Regulated Fluid Bypass
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Solution Overview
Problem
Existing fluid regulation systems in devices like HVAC systems and automatic transmissions lack efficient temperature-based control mechanisms to optimize fluid flow between devices and coolers, leading to unnecessary energy consumption and reduced efficiency.
Innovation Solution
A valve system utilizing a shape memory alloy (SMA) actuator and biasing device to control fluid flow based on temperature, directing fluid to a cooler only when necessary, thereby optimizing energy use by preventing cooler operation at lower temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional fluid regulation system operates continuously, then fluid flow is maintained, but energy consumption increases and system efficiency decreases
Solution Approach 1:
The valve system dynamically adjusts fluid flow based on real-time temperature conditions. The sealing member moves between first and second positions to either bypass the cooler or direct fluid through it, enabling the system to adapt its operation to actual cooling needs and optimize energy consumption accordingly
Solution Approach 2:
The system changes the flow path parameter based on temperature conditions. When the fluid temperature exceeds a threshold, the sealing member shifts to direct fluid through the cooler; when temperature is below the threshold, the sealing member redirects fluid to bypass the cooler, thereby optimizing energy usage based on thermal parameters
2Temperature
If the cooler operates continuously, then fluid is always cooled, but unnecessary energy is consumed when cooling is not needed
Solution Approach 1:
The system incorporates temperature-based feedback control where the thermal condition of the fluid determines the valve position. The sealing member responds to temperature conditions by shifting positions to either engage or disengage the cooler, ensuring the cooler operates only when thermally necessary and eliminating energy waste during unnecessary operation
Solution Approach 2:
The valve system automatically regulates its own operation based on fluid temperature conditions without external control. The sealing member self-adjusts between bypass and cooling paths according to the thermal state of the fluid, enabling the system to serve its own temperature regulation needs efficiently
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 valve system ensures efficient fluid circulation and energy savings by activating the cooler only when the fluid temperature requires cooling, reducing unnecessary energy consumption and enhancing system efficiency.
Implementation Method 1
The actuator includes a smart material configured to be activated in response to the temperature of the fluid in the cavity having at least a first temperature such that activation of the smart material activates the actuator. The smart material is configured to be deactivated in response to a temperature of the fluid in the cavity being a sufficient number of degrees less than the first temperature
Data Source
AI summary
A fluid circuit includes a device, a cooler, and a valve. The valve includes a housing, a sealing member, a biasing device, and an actuator. The sealing member moves inside the housing between a first position and a second position. The actuator includes a smart material that is activated when the temperature of a fluid inside the housing exhibiting at least a first temperature, causing the sealing member to move to the second position. The smart material is deactivated when the fluid is a sufficient number of degrees less than the first temperature, causing the sealing member to move to the first position. The fluid flows from the housing to the device and then to the housing when the sealing member is in the first position. The fluid flows from the housing to the cooler and then to the device when the sealing member is in the second position.