HomeMy WebLinkAboutHighgate Community Sewer Lift Station CalcsHighgate Community - PRELIMINARY DESIGN - 4-22-19.xlsx
PROJECT INFO PACKAGE/STARTUP
Job Name:Offering:
Company:Mechanical:
Contact:Pumps:
Job Type:Control Panel:
Water Type/Source:Generator:
Import/Domestic:Advisor/Startup:
FLOW RATE Peak Inflow:450 GPM 353.50Pumping Rate:549 GPM (of single pump)Static Head:29.7 Feet 353.50TDH:49.5 FeetTDH Calcs:RU Calcs
ACTIVE VOLUMEMax Pump Starts:8.00 Starts/HrCycle Time:7.50 Minutes 349.00
Active Volume:1029.38 Gallons
Active Volume:137.61 Cu Feet
Well Shape:Round
Well Diameter:8 Feet
Well Dimensions:N/A N/A
Cross-Section Area:50.27 Sq Feet
Min. Depth Required:2.74 Feet
Active Depth:2.80 Feet
STORAGE VOLUME (if required)
Time:Minutes 326.00
Flow Rate:GPM 323.10
Volume:0.00 Gallons
Volume:0.00 Cu. Feet
Min. Depth Required:0.00 Feet 322.60
Storage Depth:Feet
320.30
ON-SITE POWER
Power:
FORCE MAIN
FM Info:New Single FM 314.50
Length:474.44 Feet
FM Discharge:347.31 Feet 313.33
FM High Point:349.00 Feet
(1)(2)
Nominal ID:6"
Type/Rating:
INFLUENT PIPING (1)(2)
Influent Invert:326
Influent Size:10"Type:PVC (IPS)
Mechanical & Electrical
Complete System
All by Romtec Utilities
By Romtec Utilities
By Romtec Utilities
By Romtec UtilitiesWastewater (Sewage)
New Station
Blaine Neptune
McIntosh
Highgate Community
Import Acceptable
C900 CL 150
480V / 3-Phase
DESIGN CRITERIA
Note: Image is a preliminary representation of the pumping system.
Elevations shown are the primary factors used for sizing the wet well.
Backup levels not shown. Additional (or fewer) level settings may be required.
BACKUP PUMPS START
BACKUP PUMPS STOP
BACKUP HL ALARM
HIGH LEVEL ALARM
NON PRE-RO PUMP START
PRE-RO PUMP START
NON PRE-RO PUMP STOP
PRE-RO PUMP STOP
322.85
322.10
319.30
315.50
PROJECT INFORMATION
Job Name:
Date:3/6/2019
ELEVATIONS Unit CONSTANTS DescriptionFM High Point Elev:349.00 ft k 1.318 Configures calculations for Imperial units.
Lead Stop Elev:315.50 ft GPM/CFS 448.831 Flow conversion factor.
g 32.174 Gravitational Acceleration
PUMPING RATE*Unit 2g 64.348 2x Gravity
Total Pumping Rate:545 GPM *Estimated operating point on curve.Pumps on Duty:1 qty
SYSTEM PIPE INFO Wet Well Valve Vault Force Main Unit Description
Length:40 15 474.44 ft Length of this section of pipe
Material:Stainless Ductile Iron PVC name Pipe MaterialClass/Rating:SCH 40 Class 53 C900 DR18 name Pipe Class and/or Rating
C Factor (Old):100 110 130 none Smoothness Coefficient, Hazen-Williams
Nominal ID:6 6 6 in Nominal Pipe Size
True ID:6.065 6.22 6.08 in Actual inside diameter of pipe
True ID:0.505 0.518 0.507 ft Actual inside diameter of pipeSectional Area:0.201 0.211 0.202 sqft Cross sectional area of pipe
Flow Rate:545 545 545 GPM Flow rate through this section of pipe
Flow Rate:1.214 1.214 1.214 CFS Flow rate through this section of pipe
Velocity:6.1 5.8 6.0 ft/s Flow velocity in this section of pipe
MAJOR LOSS Wet Well Valve Vault Force Main Unit
Hydraulic Diameter:0.126 0.130 0.127 ft Pipe ID divided by 4, used by Hazen-Williams formula
V/kC:0.0459 0.0397 0.0351 none Friction coefficient used by Hazen-Williams formula
Major Head Loss:1.49 0.41 10.72 ft H2O Head loss due to frictional forces in the pipe
FITTINGS Wet Well Valve Vault Force Main K Value
Discharge Elbow:1 0.5
Elbow, 45deg:7 0.15
Elbow, 90deg:1 1 0.3Tee:1 0.6
Shut Off Valve:1 1
Check Valve:1 1.5
Outlet:1 1
Reducer:0.5
Total K:0.8 3.4 2.05 none Head loss coefficient used in minor loss formula
Minor Head Loss:0.46 1.75 1.16 ft H2O Head loss due to fittings in the pipe
CALCULATED DUTY POINT (PER PUMP)Total Major Loss:12.62 ft H2O
Total Minor Loss:3.36 ft H2O
Static Head Loss:33.50 ft H2O
Pumping Rate:545 GPM
Total Head Loss:49.48 ft H2O
Note: Grey cells contain formulas. Do not edit.
HIGHGATE COMMUNITY
Note on Hazen-Williams: H.W. is an empirical approximation of head loss in piping systems where the flow of tepid water is below ~15 ft/s. While not as accurate as
scientific formulas for determining head loss, H.W. is much less complex and adequately accurate for civil engineering purposes.
Hazen-Williams Equation: V = k C R.63 S.54
Where V is the flow velocity, k is a unit conversion factor, C is a smoothness coefficient,
R is the hydraulic radius, and S is the head loss per length of pipe.
This calculation sheet uses this formula, solving for head loss.
Minor head loss equation: hm = K V2 / 2g
Comment 3. Additionally, with the proposed volume per cycle of about 1125 gallons and a proposed flowrate of 450 gpm the cycle would complete in about 3 minutes.Yes, assuming that the inflow filled the wet well to the pump start point and then inflow stopped, the pumps would run for about 3 minutes.
Note: Continuous or near continuous inflow at some level at or below the peak inflow rate is assumed for this wet well, meaning that the situation described above is
highly unlikely.In other words, water will continue to flow into the wet well while the pumps are running, meaning that they will generally run longer than 3 minutes.
Note: The 7.5 minute cycle time is the time calculated between pump starts. This includes the time it takes to pump down the wet well (while inflow continues) to the shut off point, and then for the wet well to fill back up to the pump start point.
Special Note: The calculated cycle time of 7.5 minutes is based on a continuous inflow of 225 gpm while the pump is running. The worst case scenario is exactly half of
the peak inflow (225 being half of 450) because it results in the maximum number of starts per hour (pumps shutting on and off which creates heat in the motors).
SYSTEM PIPING
JOB NAME: DATE:
ELEVATIONS: New Pipe Old Pipe
Point at valve vault:349.00 Water @ Start Water @ Stop
NON Pre Ro Start:322.10 Pump Flow:545.0 545.0
PRE RO Lead Stop:315.50 Static Head:26.90 33.50 ft
Total Flow:545 gpm TDH:39.7 49.5 ft
Duty Pumps:1 Est. Efficiency:50%
Total Pumps:2 Est. HP:10.9 13.6 HP
PIPE MATERIAL AND SIZE
Wet Well Valve Vault Meter Vault FM1 FM2 FM3
Length:40 15 474.44
Material:Stainless Ductile Iron PVC
Class:SCH 40 Class 53 C900 DR18
Nom. ID:6" 6" 6"
True ID:6.065 6.220 6.080
New C:130 130 150
Old C:100 110 130
Section GPM:545.0 545.0 545.0
V (ft/s):6.05 5.75 6.02
PIPE FITTINGS
Wet Well Valve Vault Meter Vault FM1 FM2 FM3
Disch Ell:1
45 Ell:7
90 Ell:11
Tee:1
Valve:1
Check:1
Outlet:1
Other (K=.5):
Total K 0.8 3.4 0.0 2.1 0.0 0.0
FRICTION LOSSES
Wet Well Valve Vault Meter Vault FM1 FM2 FM3
Major Loss_New:0.92 0.30 8.23
Major Loss_Old:1.49 0.41 10.72
Minor Loss:0.46 1.75 1.16
Total Friction Loss New:12.81 Total Friction Loss Old:15.98
Highgate Community 3/6/19
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HG
L
Pump Data Sheet - Hidrostal US
Company: Romtec Utilities
Name: HIGHGATE COMMUNITY
Date: 02/22/2019
Pump:
Size: E5K-L
Type:HIDROSTAL
Synch Speed:Adjustable
Curve:CUR-E5K-L
Dia:9.75 in
Impeller:E5K-L
Pump Limits:
Temperature:---
Wkg Pressure:---
Sphere Size:2.75 in
Search Criteria:
Flow:
44.6 ft
Fluid:
Water
SG:1
Density:62.4 lb/ft³
Viscosity:1.1 cP
Temperature:60 °F
Vapor Pressure:0.256 psi a
Atm Pressure:14.7 psi a
Motor:
Consult Hidrostal US to select a motor for this pump.
Near Miss:
33.5 ft
450 US gpm
Head:
---
Static Head:
Dimensions:Suction:
5 inDischarge:
6 in Name:
Pump Selection Warnings:
None
--- Duty Point ---
Flow:549 US gpm
Head:50 ft
Eff:73.4%
Power:9.43 hp
NPSHr:5.22 ft
--- Design Curve ---
Shutoff Head:101 ft
Shutoff dP:43.5 psi
Min Flow:245 US gpm
BEP:76% @ 720 US gpm
NOL Power:
9.8 hp @ 260 US gpm
--- Max Curve ---
Max Power:
9.8 hp @ 260 US gpm
Speed:1800 rpm
Performance Evaluation:
Flow Speed Head Efficiency Power NPSHr
US gpm rpm ft %hp ft
540 1800 50.6 73 9.43 5.19
450 1800 57.1 68 9.47 5.22
360 1800 64.2 61 9.61 5.52
270 1800 73.5 51 9.79 5.93
180 1800 ------------
Selected from catalog: Hidrostal US.60, Vers 1.2
Company:Romtec Utilities
Name:HIGHGATE COMMUNITY
Date:02/22/2019
Hidrostal US
Catalog: Hidrostal US.60, Vers 1.2
HIDROSTAL - Adjustable
Design Point:450 US gpm, 44.6 ft
Static Head: 33.5 ft
Size:E5K-L
Speed:1800 rpm
Dia:9.75 in
Curve:CUR-E5K-L
Impeller:E5K-L