Verification Case 37
PRODUCT: AFT Fathom
TITLE: FthVerify37.fth
REFERENCE: Crane Co., Flow of Fluids Through Valves, Fittings, and Pipe, Technical Paper No. 410, Crane Co., Joliet, IL, 1988, Page 4-10, Example 4-17
FLUID: Crude Oil 30 degree API
ASSUMPTIONS: Assumed a rated pump speed of 1800 rpm for the HI viscosity correction calculation.
RESULTS:
| Parameter | Crane | AFT Fathom |
| Head loss (feet) | 1,405 | 1,409 |
| Pump added head (feet) | 3,405 | 3,409 |
| Pump power usage @ 67% efficiency (hp) | 1,496 | 1,498 |
DISCUSSION:
No information was provided about the pump suction, so a reservoir with zero elevation was used as the inlet with a frictionless suction pipe. The pump was modeled as an assigned flow.
The head loss from the pump discharge to the discharge tank can be obtained in AFT Fathom by subtracting the reservoir EGL from the pump outlet EGL. It also can be viewed in the Junction Deltas summary at the top of the Output window. The junction delta was setup in the Output Control window.
The added head in AFT Fathom is given in the Pump Summary on the Output window. The ideal power usage is also given in the Pump Summary as 1004 hp. Dividing by 0.67 for the efficiency obtains 1498 as shown in the table above.
