The present invention relates to a generation apparatus of a drillship, comprising: a first air trunk formed in a port direction based on a moon pool of the drillship; a second air trunk formed in a starboard direction based on the moon pool; a first turbine mounted to be rotated by air flowing inside the first air trunk by the negative pressure of the moon pool; a second turbine mounted to be rotated by air flowing inside the second air trunk by the positive pressure of the moon pool; and a generator combined with the turbine to produce electricity. The present invention has effects of continuously obtaining electricity by the positive pressure and the negative pressure applied to an air trunk, obtaining electricity by two turbines by seawater flowing in a moon pool, and producing electric power without interference in a drilling unit and a hatch door of a drillship as an air trunk on which a turbine is mounted is formed in a port or starboard direction from a moon pool.;COPYRIGHT KIPO 2015
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