Few actual pumping systems achieve the power reduction defined by the pump affinity law because of throttling, minimum flow constraints, static head
requirements due to changes in elevation, velocity and pressure between the inlet and outlet of the piping system, and control losses.
They suggested that by dividing the static head
, P, by [P.sub.js], the fraction of solids suspended ([M.sub.s]/[M.sub.tot]) can be obtained.
Due to the type of water being pumped at higher elevations, a faulty check valve or debris under the valve supplied on the fill pump can allow a back flow from the static head
on the line.
space odor measurement and gas chromatography olfactometry (GCO) that compared detection thresholds for eight compounds found no statistical difference in values between the two measurement methods for most compounds.
Each pump was also tested for its net/positive suction head requirements, a key requisite for this application, since the pumps must operate over a wide static head
It's also hard to grasp why Bowie is shown only in huge, static head
shots, as if he was never actually on location (in Vancouver, pointlessly subbing for small-town America).
In a modern mine lay-out, total pump head is becoming more important than the static head
. This means that the pumps selected must be flexible in head requirements.
This can result in difficulty in alloy adjustments because of the high static head
of metal above the coil and the short coil configuration only provides cooling to the refractories retained within the coil.
The differential static pressure or fan static head
(H) is a function of relative fan speed ([omega]) and fan airflow rate (Q) for a given fan.
Chilled water systems with multiple TES tanks pose additional considerations since flow can be motivated by the static head
differences between the open tanks.
Three valve stations were used to section off the pipeline, thus limiting the static head
to an acceptable allowable pressure.