Fuel Thermal Oxidation Test Containers with Aeration and Venting
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Solution Overview
Problem
Current methods for testing the thermal oxidation stability of fuels, such as the JFTOT procedure, rely on subjective visual evaluation of deposits and lack secure containers for test samples and waste fuels, leading to inconsistencies and inefficiencies in measuring thermal characteristics.
Innovation Solution
The development of an apparatus and method using special purpose containers with aeration and venting systems, connected via sample and waste container arms, which ensure proper positioning, aeration, and monitoring of test samples, and include an embedded computer for automated data collection and control, reducing subjectivity and improving the accuracy of thermal oxidation stability testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual evaluation methods are used to assess deposits on heater tubes, then the testing process is simple and quick, but the measurement precision is poor due to subjective human evaluation
Solution Approach 1:
The patent replaces the mechanical/visual evaluation system with an optical detection system. A light source illuminates the heater tube from the rear, and a photodetector measures the light transmission through the tube. The amount of light blocked by deposits is converted into an electrical signal, providing an objective, quantitative measurement that eliminates human subjectivity while maintaining operational simplicity.
2Reliability
If open vessels are used for test samples, then the device complexity is low, but the reliability is poor due to lack of secure positioning and vapor containment
Solution Approach 1:
The patent employs a sealed container with a flexible membrane or thin-walled structure that maintains sample integrity. The container is designed to fit securely into a designated chamber, providing both vapor containment and stable positioning. The sealed structure prevents contamination and loss of volatile components while the geometric design ensures proper alignment and secure placement during testing.
3Measurement precision
If automated data collection systems are implemented, then the measurement precision and objectivity improve, but the device complexity increases
Solution Approach 1:
The patent implements a self-measuring system where the detection apparatus automatically records light transmission data without requiring manual intervention. The photodetector continuously monitors the heater tube condition, and the system automatically logs results, calculates deposit amounts, and generates reports. This automation eliminates human subjectivity and measurement variability while the integrated design keeps the overall system manageable.
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 solution provides a more objective and reliable method for assessing thermal oxidation stability by ensuring consistent aeration, secure containment, and automated data recording, enhancing the precision and consistency of thermal oxidation stability tests.
Implementation Method 1
containers with aeration and venting for an apparatus and/or method for testing the thermal oxidation tendency of fuels
Implementation Method 2
containers with aeration and venting for an apparatus and/or method for testing the thermal oxidation tendency of fuels
Implementation Method 3
testing the thermal oxidation tendency of fuels by testing a sample at an elevated temperature and pressure to determine (1) deposits that form on a metal surface
Data Source
AI summary
A thermal oxidation tester is shown for determining thermal stability of a fluid, particularly hydrocarbons, when subjected to elevated temperatures. The tendency of the heated fluid to oxidize and (1) form deposits on a surface of a heater tube and (2) form solids therein which are both measured at a given flow rate, temperature and time. The measured results are used to determine whether a fluid sample passes or fails the test. Specifically constructed containers used in a thermal oxidation tester are shown. These containers (1) reduce physical contact to hydrocarbon test fuels, (2) reduce exposure to hydrocarbon fuel vapors, (3) reduce environmental impact by reducing chemical spills, and (4) improve overall work flow of test.