Silicon-Dielectric Condensation Surface for Hydrocarbon Dew Point Measurement
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Solution Overview
Problem
Current methods and devices for measuring hydrocarbon dew point have low sensitivity and accuracy due to the formation of fine, transparent hydrocarbon films on condensation surfaces, which are difficult to detect, and are prone to inaccuracies from impurities and long transient processes.
Innovation Solution
The use of a silicon-dielectric material with a higher refractive index than hydrocarbons for the condensation surface, combined with a light flux directed at an angle for reflection, allows for improved sensitivity and accuracy by enhancing the contrast between hydrocarbon films and the surface, facilitating quicker and more precise dew point measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional optically transparent body (glass or quartz) is used for the condensation surface, then the device structure is simple and easy to manufacture, but the sensitivity to hydrocarbon film condensation is low due to similar refraction factors
Solution Approach 1:
The patent changes the refraction factor parameter of the condensation surface material from conventional glass (1.5) or quartz (1.45) to silicon-dielectric material with refraction factor greater than 1.5. This parameter change creates sufficient optical contrast with hydrocarbon condensate (refraction factor ~1.45), enabling sensitive detection of thin hydrocarbon films through light flux intensity changes.
Solution Approach 2:
The patent utilizes optical contrast changes (analogous to color changes in the broader sense of optical property changes) by selecting a silicon-dielectric material that creates a visible difference in light reflection when hydrocarbon condensate forms on its surface. The contrast between the silicon-dielectric substrate and hydrocarbon film enables clear detection of condensation onset.
2Measurement precision
If a long transient process is allowed during measurement, then the light flux can stabilize and provide a baseline reading, but the measurement time increases and sensitivity decreases
Solution Approach 1:
The patent replaces the conventional mechanical/visual observation method with an optical detection system that measures light flux intensity changes. This substitution enables continuous, real-time monitoring of condensation formation without requiring long transient stabilization periods, as the optical system immediately detects changes in light reflection when hydrocarbon films form on the silicon-dielectric surface.
Solution Approach 2:
The patent implements continuous optical monitoring of the condensation surface by constantly measuring light flux intensity. This continuous measurement approach eliminates the need for intermittent visual observations and allows immediate detection of dew point conditions, reducing measurement time while maintaining accuracy.
3Measurement precision
If visual observation method is used for detecting condensate, then the device structure is simple, but the sensitivity to thin hydrocarbon films is low and results depend on operator literacy
Solution Approach 1:
The patent replaces manual visual observation with an automated optical detection system that uses a light source and photodetector to measure light flux intensity changes. This substitution eliminates subjectivity and operator dependency, providing objective, quantitative measurements of hydrocarbon condensation with high sensitivity to thin films.
Solution Approach 2:
The patent introduces light flux as an intermediary medium to detect hydrocarbon condensation. The light flux interacts with the condensation surface and reflects differently when hydrocarbon films are present, providing an indirect but highly sensitive measurement method that overcomes the limitations of direct visual observation.
4Measurement precision
If the light flux is directed perpendicular to the condensation surface, then the optical path is simple, but the reflection signal from hydrocarbon films is weak and difficult to detect
Solution Approach 1:
The patent employs asymmetric optical path configuration where the light flux is directed at an oblique angle to the condensation surface rather than perpendicular. This asymmetric arrangement maximizes the reflection signal from hydrocarbon films by creating a favorable angle for light interaction with the thin film layers, enhancing detection sensitivity.
Solution Approach 2:
The patent changes the dimensional approach of light incidence from normal (one-dimensional perpendicular) to oblique (introducing angular dimension). This dimensional change in light flux direction optimizes the interaction between light and hydrocarbon films, producing stronger reflection signals that are easier to detect and measure accurately.
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 approach significantly increases the speed, sensitivity, and accuracy of hydrocarbon dew point measurement, enabling more reliable and repeatable results by clearly registering even minor condensate formations and reducing the impact of impurities.
Implementation Method 1
use silicon-dielectric with refraction factor greater than refraction factor of liquid hydrocarbons
Implementation Method 2
a temperature of the mirror surface is measured by temperature sensor which cooling system is based on Peltier element or on gas expansion (Joule-Thomson effect)
Implementation Method 3
a light flux is directed at an angle providing its reflection in the observation aperture
Data Source
AI summary
The invention relates to a field of measuring engineering.For increase in speed, sensitivity and accuracy of measurement of a hydrocarbon dew point, a method for hydrocarbon dew point temperature measurement is provided, comprising feeding gas to be studied onto a cooled element with a condensation surface onto which a light flux is directed at an angle providing its reflection in the observation aperture, a cooling of condensation surface of a cooled element and registering the value of the light flux reflected from the condensation surface, advent of the hydrocarbon dew point being determined on the basis of the registered value, and as a material for condensation surface of a cooled element use silicon.The device for hydrocarbon dew point temperature measurement contains a cooled element (4) with condensation surface contained in a housing (1), having openings (2) and (3) for an input and an exit of the gas to be studied, a cooler (5), the temperature sensor (6), the light source (7), located in such a manner that a light flux from it is directed after reflection from condensation surface of a cooled element (4) to the observation aperture (8) on the registrar (9) of the reflected beams, and the cooled element (4) with condensation surface is made from dielectric with refraction factor greater than refraction factor of liquid hydrocarbons.