Permeability Analysis Apparatus Using Carrier Gas Flow
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Solution Overview
Problem
Conventional permeability analysis devices require high air-tightness materials and lengthy cleaning processes, which are inefficient and costly, especially when testing fluid mixtures that undergo chemical composition changes during measurement.
Innovation Solution
An apparatus with a cylindrical frame that is not necessarily air-tight, allowing for disposable components and continuous fluid circulation, using a carrier gas to measure permeability characteristics without significant dilution or chemical composition alteration, featuring a detection device for quantitative and qualitative analysis of permeates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional SHED or Mini-SHED devices are used for permeability analysis, then measurement of VOCs is achieved, but the chamber materials and opening/closing units must have high air-tightness requirements, increasing manufacturing complexity and cost
Solution Approach 1:
The invention extracts the testing fluid permeation measurement function from the enclosed chamber environment and transfers it to an open environmental chamber where carrier gas flows through. This eliminates the need for high air-tightness chamber materials and opening/closing units, as the measurement is now performed in an open flow system rather than a sealed environment.
Solution Approach 2:
The invention introduces a carrier gas flow system that passes through the environmental chamber, using pneumatic flow to transport the testing fluid and permeates through the tubular specimen. This pneumatic approach replaces the need for sealed chamber environments, as the continuous gas flow maintains the measurement function without requiring air-tight enclosures.
2Reliability
If conventional cleaning processes are used for the chamber, then the chamber is cleaned before and after measurement, but the process takes several weeks involving heating to 60°C and circulating clean air
Solution Approach 1:
The invention makes the environmental chamber disposable by constructing it from inexpensive materials (synthetic resin tube or metal tube without special surface treatment). After each measurement, the entire chamber is discarded and replaced with a new one, eliminating the need for lengthy cleaning processes. The low cost of the disposable chamber makes this approach economically viable.
Solution Approach 2:
The invention changes the material parameters of the environmental chamber from conventional sealed chamber materials to disposable materials (synthetic resin or untreated metal). This parameter change allows the chamber to be discarded after use rather than cleaned, fundamentally changing the maintenance approach from time-intensive cleaning to simple replacement.
3Measurement precision
If testing fluid is a mixture, then permeability characteristics can be determined, but low-molecular compositions selectively permeate causing chemical composition changes, making it difficult to comprehend the whole state of the mixture
Solution Approach 1:
The invention implements continuous circulation of the testing fluid mixture through the tubular specimen using a pump. This continuous circulation ensures that the chemical composition of the testing fluid remains stable and uniform throughout the measurement process, preventing selective permeation of low-molecular compositions and maintaining the integrity of the mixture composition.
Solution Approach 2:
The invention uses a detection device to continuously monitor the chemical composition of the testing fluid during circulation. This feedback mechanism allows real-time detection of any composition changes, enabling the system to maintain stable composition conditions and ensure accurate permeability measurements of the complete mixture rather than just individual components.
4Ease of manufacture
If disposable components are used for the environmental chamber, then cost-effectiveness and ease of disposal are improved, but the materials must be inexpensive and not require special surface treatment
Solution Approach 1:
The invention constructs the environmental chamber from inexpensive materials such as synthetic resin tubes or metal tubes without special surface treatment. These disposable chambers can be manufactured at low cost and discarded after each measurement, eliminating cleaning requirements and ensuring that each measurement is performed in a fresh, contamination-free environment, thereby maintaining measurement reliability.
Solution Approach 2:
The continuous carrier gas flow through the disposable environmental chamber ensures that permeates are efficiently transported to the detection device. The pneumatic flow system compensates for the simplicity of the disposable chamber construction, maintaining measurement accuracy despite the lack of special surface treatment or complex sealing mechanisms.
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
Enables cost-effective, efficient permeability analysis with reduced material and cleaning requirements, suitable for mixture compositions, and allows for the use of non-surface-treated materials like metals and synthetic resins, facilitating easy disposal and minimizing chemical composition changes during testing.
Implementation Method 1
conveys said carrier gas flowing out of said carrier gas flow outlet to said detection device, and then measures the volume of said testing fluid contained in said carrier gas
Implementation Method 2
said apparatus for permeability analysis circulates said testing fluid through said tubular specimen continuously or intermittently by means of said pump
Implementation Method 3
measures the volume of said testing fluid contained in said carrier gas by means of said detection device
Implementation Method 4
transmitting a testing fluid into a tubular specimen and measuring said testing fluid permeating through said tubular specimen
Data Source
AI summary
An apparatus for permeability analysis which transmits a testing fluid to the tubular specimen and measures the volume of the testing fluid permeating through the tubular specimen. The apparatus for permeability analysis has a tubular specimen, a cylindrical frame, a carrier gas flow inlet leading from the outside of the cylindrical frame to the inside of the cylindrical frame, a carrier gas flow outlet leading from the inside of the cylindrical frame to the outside of the cylindrical frame, a detection device, and a pump. One end of the tubular specimen and the other end of the tubular specimen are connected to each other via the pump. The apparatus for permeability analysis circulates a testing fluid through the tubular specimen continuously or intermittently by means of a pump, conveys the permeate to the detection device by means of the flow of the carrier gas, and then measures the permeate.