Scrubber installations: guide to successful pump operation

Scrubber installations: guide to successful pump operation27 September 2021 • 09:00-09:45 BST

#marinepropulsion

Part ofMarine PropulsionWebinar Week27-29 September 2021

Panellist documents

Page 2: Ebbe Hecht-Hansen, Iron PumpPage 7: Jonas Jacobsen & John Nielsen, DESMIPage 13: Anders N. Jensen, PureteQ

Scrubber installations - Guide to successful pump operation

Pump selection parameters

❑ Layout▪ L->R or R->L

▪ In-line or end suction

▪ Top pull out / other

❑ Materials

❑ NPSHr

❑ Efficiency

❑ VFD configuration▪ Max. impeller Ø

▪ Best efficiency

Pump installation

❑ Installation (mistakes)

▪ Suction conditions

▪ Level/Height

▪ Sea chest capacity

▪ Piping

▪ Dimensions

▪ Layout

▪ Distance

▪ Valve movement

Scrubber pump control

❑ Pumps in parallel operation

▪ Actual flow vs capacity

▪ Ramping up/down

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ironpump.com

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ScrubberPSP - Pump selection program

Key features

Design and optimize your system with DESMI pumps

Load and save ship operation profile

Integrated pressure drop calulator

OPEX and CAPEX segmentation options

Visualizes total cost split 0-10 years.

Available for all clients with free license

CAPEX and OPEX → Total cost

Segmentation options• Lowest kWh • Lowest OPEX• Lowest CAPEX• Lowest total cost 5 years• Lowest total cost 10 years

Piping system

Features• Velocity • Diameter• Hydrostatic pressure • Multiple pump option

Pump data

• Pump data available• List prices included• Export data to excel• Load and save operation

profiles

Thank you for your time!

Scrubber installations: guide to successful pump operation Webinar

Anj/27 Sept 2021

Anders N JensenCTOPureteQ A/S

Best practice for pump selection for scrubber system:

Flow base: • Max / Installed engine power• Actual operation power• Port stays / low load

• Dilution needs?• Redundancy consideration

• Pump fluid type:• Sea-water only• Hybrid / closed loop water

Pump size: • Allow overspeed capacity ofpump / VFD setup ?= do not stress out the

pump

• Ability to operate longer periodsat low speeds (40 – 50% speed)

How to avoid installation problems

Optimization of EGCS pumps operation – significant CO2 impact

Pump control: • Match pump flow to actualcompliance situation of theEGCS

Optimization: • Dynamic result of compliance sensors:• Exhaust gas ratio• PAH• Turbidity• Overboard PH

➔ EGCS system selection of selection and speed

Target operation • EGCS electrical use relative toactual engine load (MCR)0,6 to 1 %

➔ Direct impact on CO2