Possible Change of Ship Design Including Engine Room about - - PDF document

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Possible Change of Ship Design Including Engine Room about - - PDF document

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Possible Change of Ship Design Including Engine Room about Emissions of NOx and SOx Masaki Ohtsu Mitsui Engineering & Shipbuilding Co., Ltd. February 28, 2007 Introduction of Mitsui - 3 rd position in production of low speed diesel

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Possible Change of Ship Design Including Engine Room about Emissions of NOx and SOx

Masaki Ohtsu Mitsui Engineering & Shipbuilding Co., Ltd. February 28, 2007

Introduction of Mitsui

  • 3rd position in production of low speed diesel

Hyundai 7.7 million bhp Doosan 6.3 million bhp (2006) Mitsui 3.8 million bhp

  • 80 years history of B&W low speed engines
  • Low profile in medium speed diesel
  • Factory located in Tamano, Okayama-pref.
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Mitsui

Okayama Pref., Tamano City

Location of Mitsui

Recently Extended Factory

Index

  • NOx Reduction Methods

Fuel Injection Timing/Atomizer Choice Electronically Controlled Injection Use of Water / EGR SCR

  • SOx Reduction Methods

Low sulphur fuel Scrubber

  • PM Reduction
  • CO2 Reduction
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NOx Reduction Methods

  • Fuel Injection Timing / Atomizer Choice

ME engine can control injection pattern/timing Immediate mode change is possible Slide type Fuel Valve 12K98ME

Conventional FV Slide Valve

NOx Reduction Methods

  • Use of Water

Sea water?

  • EGR

Sea water Reduced effect at lower scavenging air temperature

  • SAM

Fresh water

  • Water Injection

Fresh water Water separation at engine stop Some cases for land use Water Emulsion Water Source Low Load Experience

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Fuel System with Water Emulsion

NOx Reduction Methods

  • Use of Water

NOx Reduction Methods

  • Use of Water

SW mist catcher Box for FW1stage Air Cooler with Water Mist Catcher Sea Water Inlet Sea Water Outlet FW Stage2 Outlet FW Stage2 Inlet Turbocharger FW Stage1 Inlet FW Stage1 Outlet

SAM = Scavenging Air Moisturing

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Sea Water Stage

NOx Reduction Methods

Air flow straightener Twin pass water separation stage Twin pass water separation stage SW spray line and nozzle Return from intermediate FW system Filter

Alarm

Floatation type water outlet valve SW inlet SW return buffer tank SW spray pumps SW valves

Dump p p 1

P P P P

Fresh Water 1 Stage

NOx Reduction Methods

Single pass water Spray separators Floatation type water outlet valve Intermediate FW holding tank Spray pumps Surplus dump valve To SW pumps Return from clean FW system Intermediate FW spray nozzles Filter

Dump Alarm p

NaCl

p t

P P

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Fresh Water 2 Stage

NOx Reduction Methods

Clean FW spray line and nozzles Surplus FW dump valve To intermediate FW pumps Clean FW holding tank FW pumps Floatation type water outlet valve Modified standard water mist separation system Air cooler Filter

Alarm

Dump

p p t

NaCl

Simple EGR

Hot exhaust gas inlet Freshwater injectors Cold exhaust gas outlet Freshwater drain 2nd stage Flow change cyclone water separator 1st stage Flow change cyclone water separator Seawater drain Seawater injector

NOx Reduction Methods

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Test Application on 4T50ME-X

Diesel engine Line for simple EGR Line for simple EGR Exhaust gas scrubber Non return valve WMC

WMC Spray Spray

SW FW

WMC WMC

SW FW

WMC Spray Spray EGR blower Auxiliary blower Cooler

  • No. 1 +
  • No. 2

SW

NOx Reduction Methods NOx Reduction Methods

  • SCR

Big Installation Work Reactor before T/C High sulphur no good Supply of NH3 or Urea Dynamic Response ? Low load performance ? Example of actual installation for S35MC

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  • Low Sulphur Fuel

SOx Emission Control Area (SECA) has been started High/Low sulphur fuel tanks to be provided. Careful change over is necessary. Corresponding change

  • f cylinder oil maybe

necessary

SOx Reduction Methods

Freshwater Seawater Cooling water Clean brine Sludge out Waste pump Sludge tank Recirculating pump Supply pump

Water supply / Cooling water / Water brine Circulating water Sludge

Scrubber EcoSilencer Hot exhaust gas in Exhaust gas out

  • Scrubber

SOx Reduction Methods

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  • Improvement of Fuel Injection

Slide type Fuel Valve ME engine or Common Rail

  • Reduction of Cylinder Oil Dosage

Alpha Lubricator

PM Reduction Methods

Higher injection pressure at low load Retrofit 164 engines Production at Mitsui

  • Turbo Generator

Higher Exhaust Gas Temp. (TES)

  • TCS

Utilization of Higher Turbocharger Efficiency

CO2 Reduction Methods

About 5% more About 3～4% more Efficiency of Diesel Engine is already very high

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Turbocharger Efficiency

  • 0. 50
  • 0. 55
  • 0. 60
  • 0. 65
  • 0. 70
  • 0. 75
  • 0. 80
  • 1. 0
  • 2. 0
  • 3. 0
  • 4. 0
  • 5. 0

Pressure Ratio Efficiency Line 1 Line 2 TCA Turbocharger NA Turbocharger

CO2 Reduction Methods

Higher Exhaust Gas Temp. Excess Energy to be utilized

Heat Balance

TES Conventional

Turbo-Generator + TCS

Efficiency Improve

CO2 Reduction Methods

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Turbo Compound System CO2 Reduction Methods

  • Exh. Gas turbine

Reduction gear with over speed clutch Steam turbine Reduction gearbox Generator, AC alternator

  • Approx. dimensions refering to a 12K98ME/MC: Length:

10 meters Breadth; 3.5 meters Weight: 58 tons

Power Turbines with Expected max. Output

PTG18 - 355 kW

PT based on NR

PTG26 - 1,120 kW PT16 - 500 kW PT18 - 700 kW PT20 - 1,000 kW PT22 - 1,800 kW PT44 - 2,300 kW PT55 - 3,200 kW PT66 - 4,500 kW PT14 - 350 kW PT12 - 250 kW PTG23 - 590 kW

PT based on TCR PT based on TCA

CO2 Reduction Methods

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Simple Turbo Compound System

Alternator asynchronous type Planetary Gear Power Turbine

CO2 Reduction Methods