SOx reduction. Class involvement

Transcription

1 Class involvement

2 Marpol 73/78 Annex VI MARPOL ANNEX VI applies to all ships, fixed and floating drilling rigs and other platforms IAPP Certificate is required for ships of 400 GRT and above engaged in international voyages involving countries that have ratified the conventions, or ships flying the flag of those countries. Annex VI Regulation 14 contains requirements to Sulphur Oxide (SOx) emissions from ships 2

3 GENERAL Sulphur content of marine fuels (according to MARPOL Annex VI, reg. 14) The sulphur content of marine fuels must not exceed: Global: 4.5% 3.5% 0.5% SECA/ECA: 2012 Jan Jan. (Possible postponement until 2025) 1.5% 1.0% 0.5% 0.1% 2010 July 2015 Jan. THERE is no chance of pushing back the 2015 deadline for ultra-low sulphur fuel, Brussels has warned. 3

4 Fuel share of daily costs 4

5 Annex VI Compliant Marine Fuel Use 5

6 Marine Fuels Prices ($/ton) in Rotterdam LSMGO(0,1%S) MGO LS380 (1-1.4%S) LS180 (1-1,4%S) IFO IFO LNG price : 570 $/ton - Europe 875 $/ton - Singapore EC quality types of fuel: - Quality 1 (MGO) less than 0,1%S - Quality 2 (MDO) less than 1,5%S - Quality 3 (IFO) - between 1,5 and 4,5%S (max. 3,5%S since Jan. 2012). IFO - Intermediate Fuel Oil is a blend of gas oil and heavy fuel oil Energy price equivalent: MGO LS380 IFO LNG - 20,4 $/GJ - 14,7 $/GJ - 13,9 $/GJ - 10,6-16,3 $/GJ 6

7 World LNG prices 7

8 MARPOL Annex VI - SOx requirements The following options for compliance apply: - Sulphur content of the fuel shall not exceed the set limit - An exhaust gas cleaning system approved by or on behalf of the national maritime administration in accordance with guidelines developed by IMO MEPC.184(59). The system shall reduce the total emission of sulphur oxides from vessels including both auxiliary and main propulsion engines - Any other technological method that is verifiable and enforceable to limit SOx emissions to a level (described in legislation). These methods shall be approved by the national maritime administration in accordance with IMO guidelines 8

9 SOx - DNV Services 1) Class and Statutory Approval Piping Systems, DNV Rules for Classification of Ships, Pt.4 Ch.6 - a new section for Exhaust Gas Cleaning - EGC systems has been added - Machinery, Control Systems, Electrical Systems, Structure, Stability, Fire Safety Revised MARPOL Annex VI, Regulation 14 - Guidelines for Exhaust Gas Cleaning System the environmental performance (Resolution MEPC.184(59)) 2) Advisory ECA decision support

10 Three options for SO X removal 1 LNG as fuel 2 Scrubbers for exhaust gas cleaning 3 Low sulphur fuel or fleet redeployment, i.e. give up trading in ECAs 10

11 Pros and cons Option Pros Cons Scrubber LNG Distillate fuel Can use cheaper, high sulphur fuel. Fuel available Currently cheaper fuel, but future price development is uncertain Reduces NOx and CO2 No or little modifications and investment needed. Well known and tested. Takes up space. Significant investment cost No significant reduction of NOx Requires additional energy during operation Discharge of water Retrofit difficult Requires larger fuel tanks Fuel availability uncertain Infrastructure currently limited Higher fuel cost. Prices likely to increase. Fuel availability uncertain. Wear and tear.? LNG fuel Low sulphur fuel Scrubber ECA Global 11

12 1 LNG: Technically proven, safe in operation 40 years of LNG tanker operation Used as marine fuel since 2001, now in 34 ships Class rules in place, IMO regulations in the pipeline (2014) Relatively high capex, opex highly dependent on the LNG market price Uncertainties; - LNG availability and future price? Government incentive schemes? - Infrastructure development pace? Retrofit? Or newbuilds only? - Safety record due to higher than normal safety focus? 12

13 Technology is approved and available Many manufactures are offering LNG fuelled engines: - Wärtsilä - Rolls-Royce - MAN Diesel - Mitsubishi Two engine concepts: Lean burn LNG mono fuel Dual fuel (LNG + Diesel) Main challenges are the loss of cargo space due to cylindrical LNG storage tank, and a slight methane slip from engine when running on low load (continuous improvements) Development is ongoing to shift from spherical (volume consuming) to hull integrated tanks Fuel cells on LNG for ship propulsion are under development (FellowShip) 13

14 Estimated additional costs: /kw installed Rough estimates for additional CAPEX for LNG tanks, distribution, engine, larger vessel: 14

15 A typical Baltic Sea Cargo Ship when operating on LNG 547 TEU container vessel (5000 GT) Propulsion power 3960 kw Yearly emissions, tonnes/year Particle SOx NOx CO2 emissions With LNG fuel: With low-sulphur HFO (LS380 with 1% sulfur):

16 3 Low sulphur fuel - refinery capacity Capacity upgrade primarily coking and cracking units; likely more attractive to produce higher margin products than LS fuels Capacity growth in Asia but LS fuel demand growth expected primarily in North-America and Europe Will refineries deliver sufficient volumes in the right geographies? 16

17 Class requirements related to the low sulphur fuel system Class has no specific requirements to the fuels used on board, unless special environmental class notation is denoted. The max. sulphur content is 3%S (1%S in ports and SECAs) for CLEAN and CLEAN DESIGN notations. Class notations ECA(Sox-A) and ECA(Sox-P), when granted assure compliance with MARPOL Annex VI regulations in ECAs. The fuel shall cover the quality parameters specified in ISO 8217 but S content shall not exceed 0.10% and viscosity shall not be below 2cSt at 40 C. Where applicable, alterations to systems and components are subject to approval by Class, i.e. drawings need to be submitted and approved prior to commencement of the alterations and after completion these alterations need to be verified and tested during an on board survey. Though not required by Class or Port State Authorities, ship operators may be asked by e.g. charter parties to provide a statement (witness report) pertaining to the capability of the vessel to operate on LSF, the effectiveness of fuel changeover procedures, or both. 17

18 Systems and arrangement for meeting regulations in Emission Control Areas Class notation ECA(SOx) Reliable fuel oil systems and machinery components should enable safe operation on low viscosity (2 cst) and low sulphur (0.10%) marine distillate fuel oils (marine gas oil) for a minimum of 4 days. The 4 days rule apply to ships that continuously operate on marine gas oils and also to ships provided with approved abatement technology capable of cleaning emissions to a marine distillate fuel equivalent standard. For example, SCR, Exhaust gas scrubber etc. Two alternatives: ECA(Sox-P) - Ships designed to only operate machinery components used in port on marine distillate fuel. i.e. compliance with EU low sulphur directive (Aux.engines and Boilers). ECA(Sox-A) - Ships designed to operate all machinery components on marine distillate fuel. i.e. compliance with MARPOL Annex VI for ECA s after 1 st July 2015 (Aux.engines, Boilers and Main engine). 18

19 GENERAL - SOx Emission Control Areas 200 km Day 2 Day 1 Source: Google 19

20 Low sulphur fuel A fuel change-over manual is to be developed. The machinery components and fuel piping systems are subject to a functional test using low viscosity marine distillate fuel. The function test is to include a verification of the feasibility of the ships fuel change-over procedures. 21

21 SYSTEMS AND ARRANGEMENTS Capacity of Storage tank The vessel shall be arranged with minimum one dedicated storage tank for each (e.g. low and/or high sulphur) marine distillate fuel grade carried. Tanks for storage of marine distillate fuel shall not be located adjacent to heated tanks unless the calculations required in B101 confirm that viscosity in way of machinery components (including fuel oil pumps) is not below that specified in Sec.1 A201. MGO Storage TK MGO Serv. TK HFO Bunker TK Not be located adjacent to heated tanks 22

22 Fuel Oil System Arrangements Calculations shall be performed to confirm that the viscosity of the marine distillate fuel in way of machinery components (including fuel pumps for marine distillate fuel) is not lower than that specified. The calculations shall indicate viscosity as well as temperature. Calculations shall be carried out for the operational loads as well as during change-over from residual oil to marine distillate fuel and vice-versa. The calculations shall take into account the environmental conditions Table B2 Ambient reference conditions for machinery Parameter Value Total barometric pressure 1 bar Ambient air temperature 45 C Relative humidity of air 60% Sea water temperature 32 C 24

23 Fuel oil change-over manual An approved fuel oil change-over manual shall be available onboard and shall consist of three parts as specified below: Part I shall cover procedures for safe and efficient change-over from marine distillate to residual oil and vice versa for all relevant machinery components and associated piping systems. Part II shall cover calculations of change-over time to ensure that the fuel oil being consumed by machinery components has a sulphur content not exceeding 0.10%. This part is only relevant for vessels where the piping system for residual oil and marine distillate fuel are common. Part III shall include the following: - Contingency procedures in case of poor marine distillate fuel quality, or incompatibility between marine distillate fuel and residual oil - Contingency procedures are also to be developed for failures due to vapour lock (gasification) in the event of improper change-over sequence to distillate fuel oil - Procedures for maintaining machinery readiness for emergency departures with marine distillate fuel - Methods for monitoring cylinder condition and injection pump internal leakage after switching from residual oil to marine distillate fuel - Procedures for onboard testing of compatibility between residual oil and marine distillate fuel. 25

24 MACHINERY COMPONENTS The manufacturer of machinery components shall declare that the machinery component (main engine(s), auxiliary engines, boiler(s) and any fuel oil pump) is capable of continuous operation on marine distillate fuel for the minimum number of operating days. The manufacturers declarations and required detailed information is subject to approval. 26

25 2 Scrubber regulations Revised Guidelines for Exhaust Gas Cleaning Systems MEPC.184(59) adopted July 2009, now including changes to requirements for monitoring and discharge of wash water. The guideline offers two alternative compliance schemes: - Scheme A - EGCS system approval, survey and certification using parameter and emission checks. - Each EGCS unit meeting the requirements should be issued with a SOx Emission Compliance Certificate (SECC) - Scheme B - EGCS system approval, survey and certification using continuous monitoring of SOX Emissions. - Scheme B is a single unit approval only and requires continuous monitoring of: ph, PAH, turbidity (suspended particles), nitrates and temperature All ships should have an SOx Emission Compliance Plan for the ship, approved by the Administration. 27

26 2 Scrubber challenges Scrubber technology proven on land, but still early days at sea Fairly high investment costs Energy consumption Capacity & scalability, physical footprint Sludge production and disposal Integration challenges: SOx scrubbers + NOx SCR Crew issues; training and qualification How to prove compliance; - Waste water discharge monitoring - Performance monitoring & documentation Manufacturer capacity as 2015 approaches? 28

27 Approval of documentation class requirements for ships provided with exhaust gas cleaning systems Arrangement of exhaust gas system including exhaust gas cleaning units. Arrangement of exhaust gas treatment fluid systems. Arrangement of systems for prevention of overheating of exhaust gas cleaning system components. Arrangement of sea and fresh water systems for exhaust gas cleaning units. Arrangement of waste and discharge systems from exhaust gas cleaning units. Arrangement and details of By-pass valve/dampers. Pressure drop analysis. Back pressure calculation. Test procedure for quay and sea trial including tests addressing failure impact on main functions. 29

28 Approval of documentation requirements for ships provided with exhaust gas cleaning systems contd. Where DNV is authorized to issue the IAPP certificates: For Sox - Operation Manual - SOx Emission Compliance Plan (SECP) - Operation Manual - Exhaust gas cleaning system technical manual (ETM).Scheme A or B as applicable - Operation Manual - Onboard Monitoring Manual (OMM) - EGC Record book or Electronic Logging System - Test procedure for sea trial according to the requirements of MEPC 184(59) - Other Required documentation according to MARPOL Annex VI with amendments 30

29 Exhaust Gas Cleaning Systems (EGCS) Limited testing and operational experience with the use of scrubbers Operational challenges reported Several types: - Open loop wet system: MES, Krystallon, Aalborg, Ecospec - Uses seawater directly followed by filtration. Treated water discharged to sea - Closed loop wet system : Wartsila scrubber, Clean Marine - Uses freshwater with alkaline additives (NaOH). More complex system able to hold water in port - Dry scrubber. Couple Systems - Utilises lime granulates. 31

30 Sea water scrubbing Seawater washing of exhaust gases is a well-known method, which is commonly used at onshore installations Seawater washing is a simple and well-proven technology for exhaust gas sulphur removal. Applications of this technology have been used in inert gas plants for ships for the past 20 years For marine engines, several types of equipment that can be installed For sulphur removal, an efficiency of some 90% is achievable However, in restricted waters with heavy traffic, cleaning the water from the sea water scrubber may be required to reduce the concentration of sulphur in the seawater. This is also covered by the regulation of SOx emission in MARPOL Annex VI where it is state: - 'Waste streams from the use of such equipment shall not be discharged into enclosed ports or harbours and estuaries unless it can be thoroughly documented that such waste streams have no adverse impact on such ecosystems based upon criteria provided by the Port State authorities.' 32

31 Open loop, seawater scrubbers Slide January 2013

32 2 Scrubber systems Sea water scrubber + hydro cyclone Hamworthy Krystallon Cloud chamber SOX scrubber Advanced Clean-up Technologies Inc Exhaust gas scrubber Aalborg Industries SOx scrubber + NaOH Wärtsilä DryEGCS Couple Systems GmbH Advanced Vortex Chamber Klaveness Group Clean Marine EcoSilencer Sea water scrubbing Marine Exhaust Solutions EGCSCNOx Ecospec 34

33 Hamworthy Krystallon seawater scrubber Open loop system has been installed on Holland- America s Zeendam with installed engine power 21 MW. Linea Messina 45K DWT Ro-Ro (Jan.2011) has 5 scrubbers for each of (4x2MW) engines & boiler. All in funnel. Payback time claimed: 2 years. Able to remove 98% Sox and 85% PM Investment: mill $ 35

34 Tri-Mer Corp. - Cloud Chamber Scrubber Removal average efficiency: SO2-99%, PM 98% Barge or quey based scrubber used in harbours or at anchorages A. Pre-conditioning chamber removes particles >10 um B. Positively charged claud generation chamber C. Nagatively charged claud generation chamber 36

35 Alfa Laval Aalborg hybrid system Pure SOx SOx removal rate >98% Traps up to 80% of PM Operates on SW in open sea and on FW in low alkaline waters and harbours Power consumption: approx. 1,5% of engine power Operational weight: 35 tonnes (20MW), 18 t (8MW) Dry weight : 25 tonnes (20MW), 15 tonnes (8MW) Payback time claimed: 1,2 10 years on fuel cost saving More than 1000 hours of operation 37

36 Aalborg scrubber installation - example Investment: M$; OPEX ~1.5 2% of added fuel cost ROI 1,5-2 years based on price difference of 200 $/t HFO/LSFO 38

37 Wärtsilä SOx scrubber Closed loop freshwater system with addition of alkalinity (NaOH). Main stream scrubber one unit for each engine, not suitable for boilers. Need for holding tanks Integrated scrubber for several combustion units. Wet sump in the srubber no process tank, small pump Prototype installed on the tanker Suula. Sox reduction: 99% PM reduction: 30-60% Payback time 2-3 years Sludge can be conducted to the other engine room sludge and disposed in port. 39

38 Klaveness Invest AS - Clean Marine AS Exhaust Gas Cleaning System (EGCS) based on what is described as the Advanced Vortex Chamber (AVC) principle. Serves simultaneously several combustion units. The first ocean going unit entered into service on a Klaveness bulk carrier BARU in June MW. Cyclone technology to ensure close turbulent contact and reaction between wash water (sea or fresh water) and the flue gas with possible addition of alkaline agent. A PM trapping mechanism is in place. A spray of seawater and caustic soda (NaOH, 50% aqueous solution) into the exhaust gas flow is regulated automatically based on the feedback from the emission monitoring system, which analyses the SO2/CO2 relation. Payback time is in the range 1-6 years depending on trading area. For continued operation inside ECAs it may be just a few months. >98% SOx trapping Power consumption: abt 2% 40

39 The Marine Exhaust Solutions -MES EcoSilencer Reduce SO2 exhaust emissions by up to 90 % Mixes the hot exhaust gas in a turbulent cascade with seawater. One EcoSilencer is provided for each diesel engine. After scrubbing process, the scrubbing water is pumped out from each EcoSilencer through a water filtration plant where it passes through a series of primary and secondary hydro cyclones. 41

40 CSNOX system - Ecospec Open loop system installed onboard 100,000 ton oil tanker 99% SO2, 77% CO2 and 66% NOx removal The CSNOX uses Ultra Low Frequency (ULF) waves to treat electromagnetically water that reacts with the exhaust gas 42

41 Couple Systems GmbH - DryEGCS Reduction of Sulphur (99% SOx), Particles (98% PM) Dry Scrubber (Chemisorption) with Ca(OH)2 (lime Calcium Hydroxide Granulate). SOx reacts chemically, producing gypsum disposed ashore Pilot-Installation on MS Timbus MAK 3,6 MW at 2009 Granulate silo Reactor Screw conveyor Discharge system 43

42 Cumulated costs for 50% ECA operation 44

43 Cumulated costs for 100% ECA operation 45

44 Scrubber / fuel change economy The initial price of the scrubber is assumed to be <170 EUR/kW for retrofit and large installations. It may go down to 120 EUR/kW for small ships and newbuildings. Sample costs of scrubbers would be around: - 3mln EUR for a tanker - 9mln EUR for a large container ship and - 0,5ml EUR for a small dry cargo ship Opex for scrubbers equals to 1-3% Capex. It may reach 0.8 EUR/MWh for a small ship, 0.5 EUR/MWh for medium and 0.3 EUR/MWh for a large vessel. 46

45 Safeguarding life, property and the environment 48