Applications of the gasQS technology in gas networks
28 January 2021
Optimised for use in natural gas/biogas networks with H2 admixture, the gasQS technology offers several ways to measure or monitor both gas mixture ratio and gas quality parameters with high accuracy and response speed.
Depending on customer requirements, two sensor types are used: gasQS™ static and gasQS™ flonic
In addition to the two sensors, the gasQS measuring systems offer a turnkey cabinet solution with pre-mounted safety elements, pressure reducer, heater and filter. The customer only has to provide gas lines, power supply and bus connection. The heart of the measuring system is a gasQS flonic. All systems consist of technically proven components and are manufactured, calibrated and tested in Switzerland.
Furthermore, our sensors can be used not only for the addition of hydrogen, but also for conditioning with air or propane or for process monitoring in general when it comes to gas mixing.
How the gasQS™ technology works
The gasQS™ technology uses microelectromechanical and microthermal sensors for the correlative determination of the physical gas quality. The technology allows the production of simultaneously compact, fast and robust sensors, which meet the requirements for use in biogas plants, fuel cells, industrial burners and gas engines, among others.
The microthermal sensor determines the thermal conductivity and heat capacity of the gas mixture. By means of a flow measurement through a critical nozzle, density is determined additionally. These physical sum parameters are used to derive gas quality factors such as the air/gas ratio, methane number, Wobbe index, calorific value or compressibility factor. The instrument does not require any information about the gas composition.
A special feature of the technology is that a dedicated physical model is used to simulate the behavior of each individual sensor even before the sensor is installed at the customer's site, which means that customer requirements can be met very precisely during the planning phase. This is a major advantage over other, purely correlative technologies.
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