Uniformity in gas meter functioning

Conclusions

The value ofq in relation to angle ϕ for three types of meters is shown in Fig. 6. By examining these curves and summarizing the analysis of the uniformity in the functioning of the three meters it is possible to note the following. Meters whose rotors have simplified profiles and profiles formed by involutes and arcs of a circle produce flows which vary asymmetrically about a mean value. The swing of oscillations for both meters is approximately the same and amounts to 24%. Meters with two pairs of blades in the shape of annular sectors produce a uniform flow. Since this feature is responsible for their low error, this type of meter deserves consideration. It is advisable to develop a gas-measuring installation with such meters operating, for instance, in a dispensing condition (with forced rotation from a motor). Mass production of commercial blade-type meters should also be considered in order to replace meters which are now being manufactured. This is particularly attractive since the new meters will probably be simpler to produce.