Skip to main content

Ultrasonic Gas Meter: Minimization of Sensivity to Transported Dust and Gas Property Variation

Objective



Ultrasonic gasmeter for domestic purposes are already available. For these kind of instruments the repeatability and accuracy of the flowmeter output are dependent on the fluid properties, the production tolerances and the choice of materials. A significant influence on the measurement arises from dust which affects the transducers, the reflection and distribution of the ultrasound, and the gas flow in the tube. Presently a filter is used to minimize these effects, but the additional pressure drop is undesirable.

The aim of this project is to overcome these difficulties and to improve ultrasonic gas flow meters in generic form. To this end, physical and computational modelling is being undertaken to study (i) the propagation of sound through a moving medium, (ii) the sensitivity of flow measurements to dust transport and dust deposition in the measuring tube and (iii) the sensitivity of flow measurements to gas properties. These theoretical investigations will help to design and construct some ultrasonic flow meter prototypes with different geometries. These meters will then be subjected to extensive laboratory tests (calibration, measurement of the dependence for different gases, measurements at different dust concentrations, determination of velocity profiles, etc.). The final instruments are intended to work without filters, showing the same reliability and precision of existing domestic gas meters. These new meters shall fulfill the OIML-specifications.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Siemens AG
Address

8000 München
Germany

Participants (4)

BG PLC
United Kingdom
Address
Ashby Road
LE11 3GR Loughborough - Leicestershire
Cranfield University
United Kingdom
Address
Silsoe Campus Wharley End
MK45 4DT Cranfield
INSTITUTO SUPERIOR TECNICO
Portugal
Address
1,Avenida Rovisco Pais 1
1049-001 Lisboa
UNIVERSITY OF ERLANGEN-NUREMBERG
Germany
Address
Egerlandstrasse 1
91058 Erlangen