3.4 Function of inert gas blowers
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3.4 Function of inert gas blowers

  3.4.1 Blowers are used to deliver the scrubbed flue gas to the cargo tanks. Regulation 62.3.1 requires that at least two blowers shall be provided which together shall be capable of delivering inert gas to the cargo tanks at a rate of at least 125% of the maximum rate of discharge capacity of the ship expressed as a volume.

  3.4.2 In practice, installations vary from those which have one large blower and one small blower, whose combined total capacity complies with regulation 62, to those in which each blower can meet this requirement. The advantage claimed for the former is that it is convenient to use a small capacity blower when topping up the gas pressure in the cargo tanks at sea; the advantage claimed for the latter is that if either blower is defective the other one is capable of maintaining a positive gas pressure in the cargo tanks without extending the duration of the cargo discharge.

Parent topic: 3 Function and Design Considerations
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