Monophasic Fluid Noble Gas Subsampling Through Controlled Phase Expansion
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Solution Overview
Problem
Current methods for sampling noble gases from monophasic liquids are flawed, leading to unrepresentative samples and inaccurate recalculations of original compositions due to uncontrolled pressure, temperature, and phase partition assumptions, resulting in unreliable noble gas signature determination.
Innovation Solution
A subsampling system and method that controls pressure, volume, and temperature conditions to transform a monophasic fluid into a diphasic fluid, allowing for precise calculation of noble gas signatures by ensuring equilibrium between phases, using a first inlet valve, expandable cell, and expansion cell to isolate a gaseous subsample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If noble gases are sampled from monophasic liquids using conventional methods, then sampling can be performed, but the samples become unrepresentative and fractionated due to uncontrolled pressure, temperature, and phase partition
Solution Approach 1:
The invention controls and records pressure, temperature, and volume parameters throughout the subsampling process. By maintaining precise control over these parameters during phase transformation, the system ensures that the gas phase sample accurately represents the original monophasic fluid composition, eliminating fractionation effects that occur with uncontrolled parameter changes.
Solution Approach 2:
The system performs preliminary controlled expansion of the monophasic fluid to the bubble point before sampling. By pre-establishing equilibrium conditions and transforming the fluid to diphasic state under controlled parameters, the invention ensures that noble gases partition correctly between phases, allowing accurate back-calculation of the original composition.
2Ease of operation
If pressure and temperature are not controlled during sampling, then the sampling process is simpler, but noble gas partitioning between phases becomes unpredictable leading to fractionated samples
Solution Approach 1:
The invention replaces manual, uncontrolled sampling operations with an automated system that uses computer-controlled expansion of the monophasic fluid. The system automatically controls pressure, temperature, and volume parameters, and can calculate the bubble point, eliminating the need for manual intervention while ensuring precise phase partition control.
Solution Approach 2:
The system incorporates feedback mechanisms by monitoring pressure, temperature, and volume parameters throughout the expansion process. This allows real-time adjustment and verification that the fluid reaches the bubble point and maintains equilibrium conditions, ensuring accurate noble gas partitioning between phases.
3Device complexity
If conventional sampling methods are used, then equipment complexity is reduced, but sample purification time and efficiency decrease due to higher molecule counts
Solution Approach 1:
The invention extracts only the gas phase from the diphasic fluid after controlled expansion, separating noble gases from the liquid phase and bulk molecules. By taking out only the necessary gas phase containing noble gases, the system reduces the total number of molecules requiring purification, thereby decreasing purification time and increasing efficiency.
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 accurate determination of noble gas signatures by ensuring representative and non-fractionated sampling, allowing for precise calculation of initial fluid compositions through controlled phase split and equilibrium conditions.
Implementation Method 1
the expandable cell being thermoregulated and equipped with a pressure gauge and arranged to allow the expansion of the monophasic fluid until forming a diphasic fluid at a known pressure, volume and temperature
Data Source
AI summary
The invention relates to a subsampling system or method of a monophasic fluid (2) for the preparation of a gaseous subsample (2b). said subsampling system (1) comprising: a first inlet valve (11). an expandable cell (20). a second valve (41), and an expansion cell (40); said first inlet valve (11) being arranged so as to control the flow of the monophasic fluid to the expandable cell (20); said expandable cell (20) being arranged to allow the expansion of the monophasic fluid (2) until forming a diphasic fluid (2a) at a known pressure. volume and temperature. said diphasic fluid (2a) comprising a gas phase and a liquid phase: said second valve (41) being arranged so as to control the flow of the gas phase to the expansion cell (40); and said expansion cell (40) being arranged so as to contain the gaseous subsample (2b) of the monophasic fluid (2).