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VENTILATION ARRANGEMENT FOR HAZARDOUS SPACES IN ENGINE ROOM

The following engine room spaces are very hazardous on-board the ship and therefore, a special ventilation arrangement should be provided for safe entry:

(a) CO2 storage compartment
(b) Battery room
(c) Purifier flat
(d) Refrigerating machinery space
(e) Shaft tunnel

Ventilation Arrangement for Confined Spaces of Ships:

(a) CO2 storage compartment
– CO 2 compartment is situated on open deck , well ventilated and easily accessible .
– Its compartment door is opened outward.
– Boundaries between CO2 compartment should be watertight.
– Ventilation louver is fitted at the bottom near the floor , for the leaky CO2 to release to atmosphere because CO2 is more heavier than normal air.
– In some ships , exhaust fan is provided . Its suction is taken from bottom of the compartment and lead to open air deck . Exhaust system is separately provided from others.
– In some modern built ships , CO2 leakage warning alarm is provided

(b) Battery room
– Battery room is provided good ventilation, to prevent accumulation of Hydrogen gas and risk of battery explosion
– In the room , batteries should not be placed on the floor . It must be put on the level racks.
– Ventilation inlets are arranged below the battery level.
– Ventilation outlets are arranged at the top of a battery compartment.
– If the vent is other than direct to the outside , an exhaust fan is required. The fan is in the air stream from the compartment.
– The exhaust fan must be independent from other ventilation systems.
– All ventilation ducts should be made with corrosion resistant material.

(c) Purifier Flat
– Purifier flat is usually located at the E/R bottom floor. In some ships , purifiers are provided with separate compartment.
– Normally purifiers are operating with heaters to obtain efficient purification. Therefore , inflammable gases and some leakage of heated oil are usually accumulated in the Purifier flat . By this reason purifier space or room is provided with an exhaust blower to achieve better ventilation. , in addition to the fresh air supplied by E/R ventilation
– Out let form the purifier room blower lead to the open deck . Its louver is fitted with cover , normally open , but to close in case of fire in engine room , for CO2 release .
– The exhaust blower can be stopped from emergency remote station outside engine room .

(d) Refrigerating machinery space
– Ventilation system for Refrigerating plant is depend upon the type of refrigerant used.
– In Freon Gas refrigeration system, normal E/R ventilation is sufficient for the refrigerating plant space. If the plant is provided with separate compartment normal ventilated louver is provided.
– But for Ammonia and CO2 refrigeration system ,being they are harmful to human life , positive
ventilation system i.e , exhaust fan must be used to repel any leakage of CO2 and NH3 gas to outside
atmosphere. This reduce the risk of danger for explosion or suffocation.

(e) Shaft Tunnel
– In shaft tunnel , natural draught fan is used. The force ventilation , supplied air for Engine Room is
passing through shaft tunnel via opened water tight door. The hot & foul air from shaft tunnel may
escape through emergency exit from shaft tunnel to open deck.
– In some ships , shaft tunnel ventilation is provided.

MARPOL ANNEX VI CHAPTER 1-3: “AIR POLLUTION AND GHG EMISSIONS FROM INTERNATIONAL SHIPPING

NOVEC 1230- THE NEXT GENERATION OF HALON AND CO2

fm-novec_system_3
Image Credit: www.protec.co.uk

Novec 1230, C6F12O, (3M Novec 1230) fluid is a low global warming potential Halon replacement for use as a gaseous fire suppression agent. Novec 1230 is manufactured by 3M. This Fire Protection Fluid is an advanced, “next-generation” halon and CO2 replacement, offering a number of important advantages over other clean agents and CO2 in marine applications. With zero ozone depletion potential, short atmospheric lifetime and a global warming potential of 1, Novec 1230 fluid has proven to be the first chemical halon replacement to offer a viable, long-term, sustainable solution for marine fire protection.

 

The product is based on a proprietary chemistry from 3M. Its low acute toxicity, combined with high extinguishing efficiency, gives Novec 1230 fluid the widest margin of safety among all other chemical clean agents and CO2 – even at relatively high extinguishing concentrations. This makes Novec 1230 fluid ideal for occupied spaces,
including engine and pump rooms, paint lockers and communication and control centers where personnel may be exposed to the agent upon system discharge. Novec 1230 fluid vaporizes rapidly during discharge, and it is non-corrosive and non-conductive, so it will not harm delicate electronics, radar, navigation and other equipment. And, unlike foams and powders, it leaves no residue to clean up, which means that operations can continue without interruption.

Total Flooding Systems_Novec1230
Image Credit: safety1021.rssing.com

Fig: Novec 1230 total flooding system in engine room.

Novec 1230 fluid is a high molecular weight material, compared with the first generation halocarbon clean agents. The product has a heat of vaporization of 88.1 kJ/kg and low vapor pressure. Although it is a liquid at room temperature it gasifies immediately after being discharged in a total flooding system.

The product is ideal for use in total flooding applications, localized flooding systems, directional spray type applications and may be used in portable extinguishers for specialized applications. But in addition to the conventional methods of super-pressurization using nitrogen, Novec 1230 fluid also lends itself for use in pump applications because it is a liquid.

It has been used as a full-immersion fluid in a proof of concept data center cooling system by Intel and SGI[2]

Chemically, it is a fluorinated ketone with the systematic name 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and the structural formula CF3CF2C(=O)CF(CF3)2, a fully fluorinated analog of ethyl isopropyl ketone.

The detail information of 3M Novec 1230 can be found by clicking the below links:
Click to access 3m-novec-1230-fire-protection-fluid-marine-application.pdf
Click to access enhanced-fire-protection-for-marine-applications.pdf

Source: www.3m.com

LATEST DEVELOPMENT ON ENERGY-EFFICIENCY IN INTERNATIONAL SHIPPING BY IMO (MEPC 68TH SESSION)

(Energy-efficiency and air pollution implementation at IMO environment meeting, Marine Environment Protection Committee (MEPC), 68th session.11-15 May 2015)

Seagull clean ocean_LA_2
Further development of energy-efficiency guidelines for ships

The MEPC continued its work on further developing guidelines to assist in the implementation of the mandatory energy-efficiency regulations for international shipping and:

• adopted amendments to update the 2014 Guidelines on survey and certification of the Energy Efficiency Design Index (EEDI) and endorsed their application from 1 September 2015, at the same time encouraging earlier application;

• adopted amendments to the 2013 Interim Guidelines for determining minimum propulsion power to maintain the manoeuvrability of ships in adverse conditions, for the level-1 minimum power lines assessment for bulk carriers and tankers, and agreed on a phase-in period of six months for the application of the amendments; and
• adopted amendments to update the 2014 Guidelines on the method of calculation of the attained EEDI for new ships.

EEDI review work to continue

The Committee considered a progress report from the correspondence group established to review the status of technological developments relevant to implementing phase 2 of the EEDI regulations, as required under regulation 21.6 of MARPOL Annex VI and re-established the correspondence group to further the work and submit an interim report to MEPC 69.

Text agreed for further development of a data collection system to analyse the energy efficiency of ships

The MEPC agreed text for its further development to be the full language for the data collection system for fuel consumption of ships, which can be readily used for voluntary or mandatory application of the system. In this regard, the Committee noted that a purpose of the data collection system was to analyse energy efficiency and for this analysis to be effective some transport work data needs to be included, but at this stage the appropriate parameters have not been identified.

The proposed text refers to ships of 5,000 GT and above collecting data, to include the ship identification number, technical characteristics, total annual fuel consumption by fuel type and in metric tons and transport work and/or proxy data yet to be defined. The methodology for collecting the data would be outlined in the ship specific Ship Energy Efficiency Management Plan (SEEMP).

Data would be aggregated into an annual figure and reported by the shipowner/operator to the Administration (flag State) which would submit the data to IMO for inclusion in a database. Access to the database would be restricted to Member States only and data provided to Member States would be anonymized to the extent that the identification of a specific ship would not be possible.

The MEPC agreed to recommend to the IMO Council the holding of an intersessional working group to: further consider transport work and/or proxies for inclusion in the data collection system; further consider the issue of confidentiality; consider the development of guidelines identified in the text; and to submit a report to MEPC 69.

GHG reduction target for international shipping considered

The MEPC considered a submission from the Marshall Islands, calling for a quantifiable reduction target for greenhouse gas emissions from international shipping.

During the discussion, the Member States that spoke acknowledged and recognised the importance of the issues raised by the Marshall Islands and also recognised that, despite the measures already taken by the Organization regarding the reduction of emissions from ships, more could be done.

However, whilst expressing gratitude to the Marshall Islands for the submission, the Committee took the view that the priority at this stage should be to continue its current work, in particular, to focus on further reduction of emissions from ships through the finalization of a data collection system. The Marshall Islands proposal could then be further addressed at an appropriate future session of the Committee. ​The need to consider the proposal further was recognised and the Committee also looked forward to a successful UN climate change conference (UNFCCC COP 21 meeting) in Paris later this year.

Revised air pollution guidance and requirements agreed

The MEPC considered a number of amendments and revisions to existing guidance and requirements related to air pollution measures and in particular:

  • • adopted amendments to the 2009 Guidelines for exhaust gas cleaning systems (resolution MEPC.184(59)). The amendments relate to certain aspects of emission testing, regarding measurements of carbon dioxide (CO2) and sulphur dioxide (SO2), clarification of the washwater discharge pH limit testing criteria and the inclusion of a calculation-based methodology for verification as an alternative to the use of actual measurements;
    • approved, for adoption at MEPC 69, draft amendments to the NOX Technical Code 2008 to facilitate the testing of gas-fuelled engines and dual fuel engines for NOx Tier III strategy;
    • approved, for adoption at MEPC 69, draft amendments to MARPOL Annex VI regarding record requirements for operational compliance with NOX Tier III emission control areas;
    • approved Guidance on the application of regulation 13 of MARPOL Annex VI Tier III requirements to dual fuel and gas-fuelled engines; and
    • adopted amendments to the 2011 Guidelines addressing additional aspects to the NOX Technical Code 2008 with regard to particular requirements related to marine diesel engines fitted with Selective Catalytic Reduction (SCR) Systems (resolution MEPC.198(62)).

The Committee also agreed, for consistency and safety reasons, to proceed with the development of guidelines for the sampling and verification of fuel oil used on board ships.

Fuel oil availability review to be initiated this year

The MEPC agreed terms of reference for the review, required under regulation 14 (Sulphur Oxides (SOx) and Particulate Matter) of MARPOL Annex VI, of the availability of compliant fuel oil to meet the global requirements that the sulphur content of fuel oil used on board ships shall not exceed 0.50% m/m on and after 1 January 2020. The IMO Secretariat was requested to initiate the review by 1 September 2015, with a view to the final report of the fuel oil availability review being submitted to MEPC 70 (autumn 2016) as the appropriate information to inform the decision to be taken by the Parties to MARPOL Annex VI.

A Steering Committee consisting of 13 Member States, one intergovernmental organisation and six international non-governmental organizations was established to oversee the review.

The sulphur content (expressed in terms of % m/m – that is, by weight) of fuel oil used on board ships is required to be a maximum of 3.50% m/m (outside an Emission Control Area (ECA)), falling to 0.50% m/m on and after 1 January 2020. Depending on the outcome of the review, this requirement could be deferred to 1 January 2025. Within ECAs, fuel oil sulphur content must be no more than 0.10% m/m.

Fuel oil quality correspondence group re-established

The MEPC considered the report of the correspondence group established to consider possible quality control measures prior to fuel oil being delivered to a ship. The correspondence group was re-established to: further develop draft guidance on best practice for assuring the quality of fuel oil delivered for use on board ships; further examine the adequacy of the current legal framework in MARPOL Annex VI for assuring the quality of fuel oil for use on board ships; and submit a report to MEPC 69.

Black carbon definition agreed

The MEPC agreed a definition for Black Carbon emissions from international shipping, based on the “Bond et al.” definition which describes Black Carbon as a distinct type of carbonaceous material, formed only in flames during combustion of carbon-based fuel, distinguishable from other forms of carbon and carbon compounds contained in atmospheric aerosol because of its unique physical properties.

 

For details, please click the below link:
http://www.imo.org/MediaCentre/PressBriefings/Pages/19-MEPC-ends.aspx#.VVvj5_mqqko​​
​​
IMO Briefing: 19, May 18, 2015.
Web site: www.imo.org

WÄRTSILÄ TO DELIVER SCRUBBER SYSTEMS TO CLEAN THE EXHAUST FROM TWO DUTCH RORO CARRIERS

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Royal Wagenborg, the Dutch ship owner and operator, has ordered Wärtsilä scrubber systems to clean the exhaust emissions from two of its RoRo carriers, the ‘Balticborg’ and ‘Bothniaborg’. These will be Wärtsilä’s first deliveries of its scrubber systems to Royal Wagenborg.

 

By installing Wärtsilä scrubber systems, the vessels will comply with the regulations covering emissions of sulphur oxides (SOx) while using conventional residual marine fuel (HFO).

The systems chosen for these vessels are Wärtsilä Hybrid Scrubbers, which enable the use of either closed or open loop technology to remove SOx from the exhaust. When operating in open loop mode, exhaust gases enter the system and are sprayed with seawater. The sulphur oxides in the exhaust react with the water to form sulphuric acid. Chemicals are not required since the natural alkalinity of seawater neutralizes the acid. When operating in closed loop mode, the natural alkalinity of seawater is boosted by an alkali. The hybrid approach enables operation in closed loop mode when required, for instance whilst in port and during manoeuvring using NaOH as a buffer. When at sea, the switch can be made to open loop using only seawater.

Wärtsilä Press Release.

WÄRTSILÄ 50DF ENGINE CAPABLES TO OPERATE ON ETHANE GAS

wartsila-50df
The market leading Wärtsilä 50DF marine engine has been successfully tested and certified to run on ethane (LEG) fuel. The extensive and successful testing programme was carried out by Wärtsilä in close collaboration with Evergas, a world renowned owner and operator of seaborne petrochemical and liquid gas transport vessels.

 

“We are very pleased that the Wärtsilä engines will be capable of utilising ethane boil-off gas as fuel. It increases our operational efficiency and improves flexibility in the bunkering of fuels. All in all it results in a significant reduction in operating costs, while also providing a minimal environmental footprint. It also enables us to offer our customers increased flexibility, which has a monetary value to them,” says Mr Steffen Jacobsen, the CEO of Evergas.

The capability to efficiently burn ethane boil-off gas as engine fuel significantly reduces the need of gas re-liquefaction during the voyage. This means that less power is needed for the cargo handling, thus providing a more efficient and environmentally sound overall system.

This technological breakthrough enables Wärtsilä’s customers to meet the International Maritime Organization’s (IMO) Tier III regulations without need of secondary emissions cleaning while using either LNG or LEG as fuel. The engines have the capability to seamlessly switch between Liquified Natural Gas (LNG), Ethane (LEG), Light Fuel Oil (LFO) or Heavy Fuel Oil (HFO) without the need for any modifications to hardware and with uninterrupted operation, thereby setting a new standard in fuel flexibility.

Wärtsilä press release.