Page 66: of Maritime Reporter Magazine (June 2003)

The number and

O. size of the vari-L I 11 ^BB I )li vy.

MHM|HHk able speed m (->: I • lIiTil r^^^k ^^ azimuthing thrusters installed (2 x 5,000 kW aft and 1 x 900 kW forward), are thought to be suffi- cient at this preliminary phase, and should be confirmed by resistance and propulsion test to be performed at a later stage in a Towing Basin in calm waters.

Marine Systems

The Tuna Offshore Unit is equipped with all the necessary systems to make the unit intrinsically safe and seaworthy.

The bilge system, in combination with the Ballast system, allows the drainage of liquids confined in any watertight compartment. Four 1,000 cu. m. /h are installed for this purpose, capable of de- ballasting the unit in 33 hours.

Two independent electrically driven fire pumps and one diesel driven fire pump are installed to satisfy the seawa- ter fire fighting system requirements.

A 10,000 kg/h - 7 kg/sq.m. steam gen- erator for recovery of the exhaust resid- ual heat of one main generator during transit and the essential services genera- tor in the mooring period, is installed within the aft starboard stability column.

The boiler, is made of two sections to be used depending on the steam demand.

One of the sections of the boiler is pro- vided with a fuel oil burning system that is used during the heating process of the main generators. The steam is used onboard for the various diesel oil tanks heating, bilge separators, oil purifiers, sea chests heating, accommodation services water heating, etc.

HVAC systems comprise ventilation of the machinery spaces to satisfy both health and comfort requirements.

Ventilation air is conducted into the aft machinery space through the port stabil- ity column. The main and essential serv- ices generators take the air necessary for their operation directly from the machinery space, being necessary an important ventilation flow to satisfy the oxygen demand during transit. Twelve propellers providing 500,000 cu.m. /h of fresh air and 10 extractors, are situated in deck houses in the aft starboard and port stability columns to ensure 15 reno- vations of the machinery spaces and escape routes through the aft stability columns. A 30,000 Kcal/h high speed- double way air conditioning system is available within the accommodation block. Conventional power plant auxil- iaries (lubricating, DO transfer, separa- tor, refrigeration, etc) are arranged with- in the aft machinery as appropriated.

A corrosion protection life up to 20 years could be implemented following offshore standard practices to be achieved through a combination of painting and Aluminium based cathodic anode systems. Thirty kg anodes are installed in the submerged area and bal- last tanks, while five kg anodes are used in the splash zone. The unit is outfitted with the following mooring systems. • Three 15,400 kg high resistance forward anchors, being one spare. • Three Two 900 m chains, allowing the moor- ing to be performed in water depths of 150 m during the fattening process. • Three One 300 m -150 t towing cable. • Three Eight 200 - 44 t wire mooring ropes. • Three Mooring and Towing Brackets as appro- priated.

Circle 83 on Reader Service Card

The preceding was excerpted from an article by Abel Mendez Diaz, Industrial Plants

Manager, and Francisco de Bartolome

Guijosa, Engineering Director of Izar Fene

Shipyard.

CAPAC® CORROSION PROTECTION GOES A LONG WAY

SHAFT-GROUND ASSEMBLY

SHAFT-HULL MILLI-VOLTMETER

ANODE POWER SUPPLY/CONTROLLER

MONITOR

REFERENCE ELECTRODE

DIELECTRIC COATING CAPASTIC

ANODE

POWER SUPPLY/CONTROLLER :R

REFERENCE ELECTRODE

CAPAC corrosion protection systems are designed for higher quality and longer life than competing systems. At a lower installed cost. Retrofit your ocean-going vessel or offshore platform with CAPAC" systems today, and realize the full benefits of long-term protection tomorrow.

Contact USFilter's Electrocatalvtic Products at 2 Milltown Court, Union, NJ 07083

Phone: 908-851-2277. Fax: 908-851-6906. vvww.usfilter.com .VIVENDI water company

K ( A-00-H-AD-201

Circle 331 on Reader Service Card

MAINTENANCE MACHINES FOR DIESEL ENGINES

CHRIS-MARINE - THE ORIGINAL!

The best investment for your vessel

We also carry out the work, in-situ or in our workshops

World-Wide sales and Service network! For 2-stroke & 4-stroke engines

Valve seat grinding!machining

Valve spindle grinding

Cylinder liner honing

Sealing surfaces grinding/machining

Portable lathes for various purposes

Special machines for workshops

CHRIS-MARINE the optimum solution

E o o 0) c 'Z

TO

E w 'Z r o

Chris-Marine Head Office and Subsidiaries

Sweden

Chris-Marine AB

Tel: +46 - 40 671 2600

Fax: +46 - 40 671 2699 [email protected]

Norway

Chris-Marine Norge A/S

Tel: +47 -3279 8590

Fax: +47 - 3279 8509 steinar.olsgard@chris- marine.com

Croatia

Chris-Marine Adriatic d.o.o.

Tel: +385 - 51 217 818

Fax: +385 -51 217 560 [email protected]

Singapore

Chris-Marine (S) Re. Ltd.

Tel:+65 - 6268 8611

Fax: +65-6264 3932 [email protected]

USA

Chris-Marine East Coast Inc.

Tel: +1 - 904 354 6566

Fax: +1 - 904 358 7862 s-marine.com

Circle 348 on Reader Service Card 66 Maritime Reporter & Engineering News