This report investigates the feasibility of using impermeable membranes to permit the dual purpose use of cargo tanks in commercial vessels as clean water ballast tanks. Both engineering and economic assessments were made of the membrane method of isolating cargo and ballast in a common tank. The investigation included model tests, membrane material studies, ship structural analysis and a patent search of related membrane applications. Both new and converted existing ...
A preliminary engineering assessment has been made of a proposed method of isolating oil and other fluids from sea water ballast using impermeable membranes. The design constraint of smooth walled tanks has been assumed and feasible methods of achieving this feature have been established both for new and existing tankers. Preliminary designs for membranes in cargo- ballast tanks were established and costs of suitable rubber-nylon membranes for a 250,000 ton ...
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