Abstract
Energy management is dependent on the
ability to accurately measure all energy sources
so controls can take place.
A survey fifteen years ago in Great Britian
showed that the primary elements used for flow
measurement of steam and gases were square law
devices, with limited turndown and high
sensitivity to velocity profile. This showed
the need for a primary device able to give
accurate readings over a wide turndown; long
life handling hostile fluids; presenting the
fewest possible installation problems. A
variable differential pressure device producing
a differential directly proportional to flow
rate is the result.
Grant, G. H. (1986). Accurate 100:1 Rangeability Linear Response Head Meter. Energy Systems Laboratory (http://esl.tamu.edu). Available electronically from
https : / /hdl .handle .net /1969 .1 /93066.