Tomislav skra i ma undergraduate english course for mari ne engineers 2nd semester
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Tomislav Skračić, MA Undergraduate English Course for MARI NE ENGINEERS 2nd Semester. Essential reading: SPINČIĆ, A., An English Textbook For Marine Engineers I ., Pomorski fakultet, Rijeka 2008.

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Tomislav Skračić, MA Undergraduate English Course for MARI NE ENGINEERS 2nd Semester

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Tomislav Skračić, MAUndergraduate English Course forMARINE ENGINEERS2nd Semester

Essential reading:

SPINČIĆ, A., An English Textbook For Marine Engineers I., Pomorski fakultet, Rijeka 2008.

LUZER, J., SPINČIĆ, A., Gramatička vježbenica engleskog jezika za pomorce, Pomorski fakultet, Rijeka 2003.


KEY WORDS

watertube boiler- vodocijevi kotao

firetube boiler- vatrocijevni kotao

curcuit of the boiler- kotlovni krug

descending body of water- spuštajuća količina vode

ascending- uzdižući

circulating tube- protočna cijev

screened- zaštićen

generating tube- isparna cijev

casing (n.)- kućište

downcomer (n.)- silazna cijev

displace (v.)- istisnuti

WATERTUBE BOILER – Classification


KEY WORDS

main boiler- glavni kotao

donkey boiler- pomoćni kotao

distilling plant- postrojenje za pripremu pitke vode

low-pressure boiler- niskotlačni kotao

intermediate-pressure b.- srednjetlačni kotao

high-pressure boiler- visokotlačni kotao

inclination (n.)- nagib

single-flow boiler- kotao s jednostrukom

dimnom komorom

double-flow boiler- kotao s dvostrukom

dimnom komorom

WATERTUBE BOILER – Classification


WATERTUBE BOILER – How it works


  • Watertube boilers can be grouped according to:

  • Water circulation

  • Application on board ship

  • Steam pressure they generate

  • Etc.

WATERTUBE BOILER – Classification


  • Water circulation:

  • According to water circulation, boilers can be grouped into boilers featuring

    • a) natural water circulation, or

    • b) forced water circulation

  • Employment of boilers aboard ships:

  • By their application on board ships, boilers are classified as main boilers or donkey boilers.

  • Main boilers generate steam for the main engine that drives the propeller and for auxiliary duties.

  • Donkey boilers are mainly used on diesel-driven ships to supply steam for driving steam pumps and turbo-generators, for oil heating, water heating, space heating, galley and laundry...


    • Pressure:

    • According to steam pressure they generate, boilers can be classed as low, intermediate and high-pressure boilers.

      • Low-pressure boilers (up to 30 bar)

      • Intermediate boilers (from 30 to 70 bar)

      • High-pressure boilers (up to 145 bar)

    • Watertube boilers may also be classed according to:

    • Number of drums (single-drum, two-drum and three-drum boilers)

    • Tube inclination (horizontal and vertical)

    • Arrangement of gas flow (single-flow and double-flow boilers)


    • What basic difference is there between a firetube and a watertube boiler?

    • What characteristics enable boiler classification?

    • How can boilers be grouped according to water circulation?

    • What are generating tubes?

    • What are downcomers and what do they provide?

    • How is forced circulation achieved?

    • What difference is there between a main and a donkey boiler?

    QUESTIONS


    • Example:The economiser heats the feed water.

    • The feed water is heated by the economiser.

    • Boilers generate steam for the main and auxiliary engines.

    • Shipbuilders have built many ships with diesel-electric drive.

    • Designers will estimate the power of the engine.

    • The pump is drawing make-up water from the tank.

    • Engineers can reverse the engine.

    • Merchant vessels did not use nuclear power.

    • An electric-power unit will propel all types of ships.

    • The main engine drives the propellers.

    EXERCISE 1 – Turn the following sentences into the Passive:


    • Vođa stroja je otišao na palubu da popravi sidreno vitlo.

    • Brod vozi smanjenom brzinom da spriječi (prevent) pregrijavanje (overheating) motora.

    • Da bi se spriječilo pregrijavanje, potrebno je rashladiti motor.

    • Brod je vozio svom snagom kako bi što prije stigao u luku spasa (port of refuge).

    • Dat ćemo sve od sebe da popravimo oštećenu osovinu.

    • Zrak se tlači u cilindrima da bi se ubrizgano gorivo upalilo.

    EXERCISE 2 – Translate the following sentences into English using in order to + infinitive or only to + infinitive


    • EXAMPLE:

    • The engine could not be run after the collision because the crankshaft was heavily bent.

    • The engine could not ve run after the collision

      due to heavy bending og the crankshaft.

    • In port the vessel manoeuvred with assistance of two tugs because the engine lost power.

    • The valves did not open because the rocker gear did not function properly.

    • Thermal problems occurred as the exhaust valves were not sufficiently cooled.

    EXERCISE 3 – Rearrange the clauses using due to + noun


    • EXAMPLE:

    • The engine could not be run after the collision because the crankshaft was heavily bent.

    • The engine could not ve run after the collision

      due to heavy bending og the crankshaft.

    • The relief valve opened because the pressure in No. 1 cylinder suddenly increased.

    • The friction in the bearing surface increased because the lubricant was wrongly chosen.

    • The engineer on duty stopped the engine as compression was greatly reduced.

    EXERCISE 3 – Rearrange the clauses using due to + noun


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