pump it up vertical or horizontal pump station · • pump is immersed during operation 2. v...
TRANSCRIPT
PUMP IT UP:VERTICAL OR HORIZONTAL
PUMP STATIONAmanda Powers, P.E.
Sam Meisner, P.E.
1
WHAT IS A PUMP?• A machine that imparts kinetic
and potential energy to a liquid to force a discharge from the machine.
• A machine that moves a volume of liquid from a lower to higher elevation or energy level
• A machine that moves liquid along a pipeline.
2
HORIZONTAL SPLIT CASE PUMP• Type of Centrifugal Pump
• Shaft & Impeller Horizontally Supported between Bearings
• Case Split at Shaft• Bottom or Side Suction
3
Suction Discharge
Suction
Suction
Suction
Discharge
1
5
4 3
Suction
2
VERTICAL TURBINE PUMPS
4Pump
Suction
Discharge
1
3
4
• Type of Centrifugal Pump• Shaft and Impeller Supported Vertically
• Pump is Immersed During Operation
1
2
VERTICAL TURBINE PUMPS
51
6
4
3
2
5
PLAN VIEW: HORIZONTAL VS. VERTICAL
Horizontal Split Case Pumps
Vertical Turbine Pumps
Suction
Discharge
DischargeSuction
*Water Level is Below Grade
SECTION VIEW: HORIZONTAL VS. VERTICAL
Horizontal Split Case Pumps Vertical Turbine Pumps
Suction Discharge
Discharge
Suction
*Water Level is Below Grade
SECTION VIEW: HORIZONTAL VS. VERTICAL
Horizontal Split Case Pumps
Vertical Turbine Pumps
*Water Level is Above Grade
DischargeSuction
Suction
Discharge
SYSTEM CURVES: HORIZONTAL / VERTICAL
HORIZONTAL SPLIT CASE PUMP - ADVANTAGES• Ease of Maintenance
• Fewer Bearings• Removable Casing• Easy Access• Shorter Duration of Downtime
• Generally Longer Life• High Efficiencies• Various Suction Orientations
• Flexibility in Station Arrangement• Mechanically Stable at Variable
Speeds• Lower Cost if Water Level is
Above Grade 10
HORIZONTAL SPLIT CASE PUMP – DISADVANTAGES• Larger Station Footprint - Typically• Pump & Appurtenances Below Water Level• Below Grade - Subject to Flooding
• Best Case Scenario - Build at Grade Level
• Capacity and Head Only Added with Additional or Replacement Pumps
11
VERTICAL TURBINE PUMPS - ADVANTAGES
• Smaller Station Footprint• Add Head with Stages• Naturally Steeper Curve
can Cover Large Head Range
12
VERTICAL TURBINE PUMP - DISADVANTAGES• Maintenance Burden
• Larger Number of Parts• Harder to Access Pumping Equipment• Increased Maintenance Downtime
• Lower Efficiencies• Requires Study & Modifications
if Variable Speed Applications
13
CASE STUDY – SITE CONGESTION + HYDRAULICS
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CASE STUDY – VTP ON TOP OF BURIED STORAGE TANK
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CASE STUDY – PUMP O&M + STATION ACCESSIBILITY
16
CASE STUDY – BELOW GRADE HSCP
17
DECISIONS…
FACTORS TO CONSIDER FRONTRUNNER
Limited Space Available Vertical
Water Level Above Grade Horizontal
Water Level Below Grade Vertical
Large Range of Flow and Head Vertical
Criticality of Station and Maintenance Downtime Horizontal*
Variable Speed Horizontal
Life Cycle Cost Vertical / Horizontal
Hydraulics (Suction & Discharge) Vertical / Horizontal
Pump Availability Vertical / Horizontal
Familiarity & Preference of Client/End User Vertical / Horizontal
Other? Vertical / Horizontal18
* If below grade, must consider risk of station flood
QUESTIONS?