Anti-icing Fluid Loop for Space Thermal Control
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Solution Overview
Problem
Thermal control systems in extreme environments, such as space vehicles, face issues with ice formation in fluid loops due to water vapor permeation and freezing, which can lead to blockages and reduced system efficiency.
Innovation Solution
Incorporating an anti-icing fluid, like ethanol, which is immiscible with the heat transfer fluid but miscible with water, to maintain a mixture that remains liquid at extreme temperatures, thereby preventing ice formation and ensuring fluid loop functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water vapor permeation occurs in the fluid loop, then thermal control system operation is enabled, but ice crystal formation and blockages occur at extreme temperatures
Solution Approach 1:
An anti-icing fluid is introduced as an intermediary substance between the heat transfer fluid and water vapor. This anti-icing fluid is miscible with water but immiscible with the heat transfer fluid, forming a protective layer that prevents water vapor permeation and subsequent ice crystal formation in the fluid loop at extreme temperatures
Solution Approach 2:
The invention changes the chemical composition parameters of the fluid loop by adding an anti-icing fluid with specific properties (miscible with water, immiscible with heat transfer fluid). This parameter change allows the system to maintain reliability at extreme temperatures by preventing ice crystal formation while continuing to enable thermal control operations
2Temperature
If conventional heat transfer fluid is used, then thermal energy transfer is achieved, but ice formation reduces system efficiency at extreme temperatures
Solution Approach 1:
The invention creates a composite fluid system by combining the conventional heat transfer fluid with an anti-icing fluid. This composite approach allows the system to maintain thermal control capability while preventing ice formation that would otherwise reduce productivity and system efficiency at extreme temperatures
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 anti-icing fluid effectively prevents ice crystal buildup, maintaining the thermal control system's efficiency and performance even in temperatures as low as -120 degrees Fahrenheit by forming a liquid mixture with water, thus ensuring continuous operation.
Implementation Method 1
The anti-icing fluid is immiscible with the heat transfer fluid and is miscible with water to form a mixture that remains liquid at temperatures under use conditions in space
Implementation Method 2
a thermal control system for transferring thermal energy between the first component and the second component
Implementation Method 3
a pump for circulating the heat transfer fluid and the anti-icing fluid within the fluid loop
Data Source
AI summary
The present disclosure provides examples of thermal control systems for reducing ice formation. In one example, a space vehicle comprising a first component, a second component, and a thermal control system is provided. The thermal control system is configured for transferring thermal energy between the first component and the second component. The thermal control system comprises a fluid loop in thermal communication with the first component and the second component, a heat transfer fluid including a perfluoropolyether, an anti-icing fluid, wherein the anti-icing fluid is immiscible with the heat transfer fluid and is miscible with water to form a mixture that remains liquid at temperatures under use conditions in space, and a pump for circulating the heat transfer fluid and the anti-icing fluid within the fluid loop.