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Home My WebLink AboutWQ0043292_Application (FTSE)_20220404751 South Secondary LS Narrative The proposed project will consist of the installation of lift station consisting of: • Duplex 14 HP Pumps with SCADA • Associated piping and valves • Flow Meter • Odor Control • Combination Air Release / Vacuum Valve • Diesel Powered Backup Generator Associated sewer upstream and downstream of the Lift Station has already been permitted thru City of Durham 7S1 South Phase 1B (5-001146). The wastewater is then collected at the existing 751 Primary LS (permitted by the State WQ0041756) then pumped directly to the South Durham WRF (NC 0047579). The flow attributed to this project has already been anticipated in the 751 Primary LS calculations. The proposed Lift station will serve approximately (73) 4BR SF units and +/- 150,000 SF future Office Space (+/- 600 employees). Total expected permitted flow at buildout is 50,040 GPD to this lift station. CE CROUP 301 GLENWOOD AVENUE, SUITE 220 RALEIGH, NC 27603 Phone: (919) 367-8790 E-Mail. mark@cegroupinc.com Date Nov 16, 2021 Project Summary: 751 Secondary Lift Station Pump Selection The 751 Secondary Lift Station has been sized to accommodate the remainder of the proposed project not currently being served by gravity sewer (conveyed to Stagecoach LS) and the Primary LS. The proposed permitted flow to the Primary LS is 385,180 GPD (includes Secondary LS). The Secondary Lift Station's proposed permitted flow is 50,040 GPD. This secondary station will discharge into a manhole then flow into the Primary Lift Station. Pump Selected: Flygt NP 3153 HT 3 with 466 mm Imp BEP for this Pump and impeller is 559 GPM (67.5% Efficiency) (4) Scenarios are presented 1A Current Single Pump: 495 GPM at 53 FT TDH POR at 88.5% of BEP 2A Current Dual Pump: 316 GPM at 66 FT TDH AOR at 56.5% of BEP 1B Future Single Pump: 455 GPM at 54 FT TDH POR at 81.4% of BEP 28 Future Dual Pump: 284 GPM at 68 FT TDH AOR at 50.8% of BEP (2) other pumps have been evaluated: Myers 4 RC14CRX (fell within acceptable operating range but had a lower overall efficiency) Sulzer XFP 100E (with single pump operating range within POR; with 2 t'umps operalew Qi ks.ide AOR) Calculations are provided to support the above selection . a NP 3153 HT 3— 466 Performance curve �R Duty point xylem +anu Flow Head 5S9 US g. p. m 48.8 ft Curves according to- Water, pure39.2-F,62.4216/ft'j6891E-51P/s n 100 2M 700 400 500 5110 700 800 9W low 1100 IDS g p m ] Cure 1509906 Project Created by 81eck 0 Createdon 8/24/2021 tat update 8/24/2021 Scenario: Base R-1 P-b Pump 1 Title 751 South Secondary LS Project Engineer MPA p-1... Icurrent 1 pump.wcd CE Group WaterCAD v7.0 (07.00.061 001 08/23/21 10:19:53 PNO Bentley Systems Inc Haestad Methods Solution Center Watertown. CT 06795 USA +11-203-755-1666 Page 1 of 1 a+ ,H, C m CL M R m U- ul 16 c .ai c- 0 a au a Q w � a 4. CL CL Cry a O Q G Ln v HE 0 v w C 0 cn O to V-+ R 4 n rn r• 3 C c cn .-i U- Z CL C31 C EU Qf C� L 70 m tl3 "Q � c ro C� U. LU a z Buoyancy Calculations Secondary LS Wei well Outside Dimensions 9.33 Fcet Wet well Inside Dimensions 8 00 Peet Wet well fop Slab Elevation 24.03 Feel Wet well Invert Ele%.ation 253.93 Feet Extended Base Slab Diameter 11.33 beet Extended Base Slab']'hickncss 1.00 Feel I`op Slab Thickness 0.67 Peel Calculate Total Volume of Wet well Structure Volume of Wet well Riser Sections 1374 jcf Volume of Wet well Extended Base 101 of Total Volume of Wet well Structure 1474 jef Calculate Total Volume of Water Displaced 1120 Displaced .. ( Volume of Wet well Structure) * (62.4 Ibsiel) 1120 Displaced= 91994 lbs Calculate Weight of Wet well Components Section Total Ht Weight Top Slab Thickness (fl.) 0.67 6871 Riser - Total Vertical Ft. 20.10 54579 Base Slab Thickness (11.) 1.00 15123 Totals- 21.77 76573 Total Weight of Concrete in Wet well 76573 lbs. Weight of Soil Above Extended Basel Footing "Total Area of Extended Base "Total Area of Wet well Riser Area of Extended Base less Wet well E leighl of Soil Above Extended [lase Volume of Soil Above Extended Base Volume of Soil (with 25 Deg Friction Angle) Weight of Soil Above Extended Base (estimated) "Total Weight of Soil Above Extended Base 101 sf sf sf It cf cf Ibslcl' lbs/cf 68 32 23 746 3318 50 203212 Flotation Protection Required? Weight of Concrete and Weight of Soil Above Extended Base 279786 lbs Weight of Water Displaced By Wet Well: 91994 lbs Factor of Safety 3.04 Additional Flotation Protection Required? NO ❑ MEMO n TELEPHONE F, FIELD REPORT T CA, C. , - EONS CE GROUP AUTHOR. H—L- www.cegroupinc.com DATE: }_TIME_ PROJECT: i 4 h CLIENT: 5UBJECT: � — � � � PROJECT NO.: T i �2- Ir �2. � �� ►� Vq '"" r 301 Glenwood Avenue, 5u•te 220, Ra=e-ah, NC 27GO3 This dynamic performance graph is based on actual tests carried out at Utah State Water Research Laboratory. The comparison is based on 6" 1150 mm) valves. Check Valve Pressure Loss Curve Comparison RANGE Of MOST COMMON `-' OPFRAnNGiucirryi in -' 10 9 SILENT CHECK VALVE CURVES BASED 0:0 a INCH SIZE VALVES (WAFER STYLE) 8 HEAD LOSS CHARTS FOR OTHERS PAGE 10 Q AVAILABLE UPON REQUEST CUSNION SWING CHECK VALVE 1i 7 PApE b O DOUBLE DOOR CHECK VALVE S PAGE 1 W tlUosllt FLAPPER LL OWING CHECK VALVE Z 6 PAGE 7 61lENT CHECK VALVE (ptaet OTYW% N b yr I ,c OBLANTING ci:C Ij CHECK VALVE 3 PAGE 8 AUTOMATIC CONTROI y CHECK VALVE 2 PAGE 9 �i 3 PsI 2 PS1 I PSI 0 1 2 1 4 5 8 7 8 A 10 11 12 VELOCITY F PIPE�FASJ FOR ILLUS RATION 0 LY F',eA �o -�� Suction Speed and NPSH Suction Speed Current One Pump S= n * Q(BEP) (NPSHr) 75 lA Current One Pump n 1800 rpm Q(BEP) 559 GPM NPSHr 13.6 FT 4- 6009 2A Current Two Pumps n 1800 rpm Q(BEP) 559 GPM NPSHr 13.8 FT `'�- 5944 1B Future One Pump n 1800 rpm Q(BEP) 559 GPM NPSHr 13.1 FT 5= 45191 28 Current Two Pumps n 1800 rpm Q(BEP) 559 GPM NPSHr 13.9 FT S= 5912 NPSH Check for Worst Condition NPSHa for 2B �+ G �� 4`(d Pump El at Shutoff 257.93 FT 2 Atmospheric Pressure 33.5 FT Static Suction 1.3 FT 1.65-0.25 Vapor Pressure 0.8 FT 4 Velocity 7.26 FPS 284 GPM 4" Orifice 1nlOi r/� Velocity Head Z 0.27 FT Q00 Z-7 �;f NPSHa (b+4 33.73 FT NPSHr 13.9 FT�„�j1� FM Residence Time 1300 LF of 6" FM = 1908 Gallons Purrs ing 836 GPM per cycle FM turns over every 2.3 Cycles Scenario 1A 1 Pump Current NP 3153 HT 3- 466 Patented self cleaning sem. open channel impeller. idea forpumpingin wastewater applications. Modular based design with high adaptation grade. Technical specification L y ■ IN Configuration F YGT xylem Curves accordineto: Watw-nurn 39.2'F_62.4281h/ft1_1-6929FStNlt Motor number Installation type N3153 800 21.15.4AS-W P • Semi permanent, Wet IE314hp tmpellerdianneter Discharge diameter 230 mm 3116 inch Pump information Materials Impeller diameter Impeller 230 mm Grey cast iron Discharge diameter 3/16 inch Inlet diameter 150 mm Maximum operating speed 1800 rpm Number of blades 2 Max. fluid temperature 40'C Project Block 0 ws...w•a� On.w.cn NA UIMIt�nel envmrra•a;w u•.rraolr. p�va. t*r 400 600 am low [US y.P Curve: 150 9906 Created by Created on 8/24/2021 Last update 8/24/2021 NP 3153 HT 3- 466 Technical specification Motor - General F a xylem ,oar Motor number Phases Rated speed Rated power N3153.80021-15.4AS-W 3^ 18DOrpm 14 hp IE314hp AIU approved Number of poke Rated current Stator variant No 4 34 A 4 Frequency Rated vottap Insulation class Type of Duty 60 HE 200 V H S 1 Version code 800 Motor - Technical Power factor.1/1 Load Motor efficiency- i/1 Load Total moment of inertia Starts per hour mau. 0.97 92.4 % 1.91 lb f' 30 Power factor- 3/4 Load Motor effkkncy-3/4Load Starting current, direct starting 0.96 92.1 % 246 A Power factor- 1/2 Load Motor effkkncy-1/2Load Starting current, star--deha 0.92 91.6 % 82.1 A Project created by Block 0 Created on 8/24/2021 Last update 8/24/2021 M1orrr.rsen a��.ra Y��irnrM41 %0 6atamlisw lHl Nparrt ta901M igrw U&1. FXr N P 3153 HT 3— 466 Performance curve Duty point Flow Head 495 u5 g PM 53 2 ft FL xylem !,raid Curves according to: water, pure39 2 -F,62.428lb/ft3,1.6889E-5 ft'/s IM Head 92 88 84 75 72 68 64 56 Lai.2 R 5 45 675 44 36 32 28 24 1 1 230mm 8 4pp 14 Prrrp EBkf� t6711 80. fAerall EMclerrcy [6 la 6 % 40- 30- $�@IAIB 1 11.L, P�Inpvl PI Shell P2 I 230mm(P1} hP} power 10.0 230nrn (P2} F927 90 B.O. 70 6,0 5.0 Ifq HPSHR- Iues 3 230mm uPSHR _ 32 809 R 26 24 18 1 136R 5 194.9I15 ..ra 0 f00 200 300 400 500 am 700 B00 900 1000 1100 w p.p.m.l Crve: IS09906 Project Created by Block 0 Created on 8/24/2021 Lastupdate 8/24/2021 wer�r..r. Dn..r. u.rps�up) so.6elOWlre1tl 11e) Nf40l11010IA{C 1gMwUb1 F%T NP 3153 HT 3" 466 Duty Analysis�X x a YY€em i•:•a�•,�€ Curves accord ng to. Water pure,39 2 -F,62.428Ib/ft.1.6889E,5 ft'/s ft 0 100 200 300 400 500 600 700 800 900 1000 1100 [U5 g.p.m.J Operating characteristics Pumps/ Flow Head Shaft PoWer Flow Head Shaft power Hydr.eff, Specmc Systems Energy 1 495 US g.p.m. 53.2 ft 9.92 hp 495 US g.p.m 53.2 ft 9.92 hp 67.1 % 267 kWh/U5 M Project Created by Block 0 Created on 8/24/2021 last update 9/24/2021 HPSHre 13.6 ft MO {e:@PI:rAYtl :�1, NWO]s :6A�N! ;V—UM-W NP 3153 HT 3— 466 VFD Curve If Head Curves according to: Water, pure, 39.2'F,62.428 lb/ft3,1.6889E-5fe/s t] 95 90 85 80 75 70 65 60 55 50 45 67.5 0 Rypi�R.r�lon G\\�y�rn U�r prRga) !e0 0@1fQ111sM 11r! NYQ021 4e arMne 1gw�Us1F%T NP 3153 HT 3" 466 VFD Analysis FLYGT A xylem !;r, : i 0 100 200 300 Operating characteristics PUMPS Fregaenty Flow Head Syste ms 1 60 Hz 495 US g.p m 53.2 ft 1 SS Hz 430 US g.p. m. 46.3 ft 1 50 Hz 361 US g.p. m. 40 ft 1 4S Hz 286 US g.p.m. 34.4 ft 1 40 Hz 203 US g.p.m. 29.7 ft Project Bock 0 J 1t 400 500 600 700 800 900 1000 1100 [US g p.frli Shah power Flow Head Shaft power Hydr.eff. Spedfk NPSHre Energy 9.92hp 495 USg.p.m 53.2ft 9.92hp 67.1%267kWh/US N 13.6ft 7.53hp 430USg.pm 463ft 7.53hp 66.7%236kWh/US N 11.8ft 5.53hp 361USg.p.m 40ft 5.53hp 65.9%217kWh/us N milt 3.89 hp 286 US g. p m 34 4 ft 3.89 hp 64 % 195 kWh/US & 8.55 ft 2.57hp 203USg.p.m. 29.7ft 2.57hp 59.4%178kWh/US N 7.22ft Cteoted by Createdon 8/2412021 Last Update 8/24/2021 no ea,ew,�eun „er e�sme„em.ara ,grnua.. Exr