Thermal transition design for vessels carrying liquid cargoes at nonambient temperatures

Abstract

Abstract An externally insulated integral tanker vessel intended especially for the transport of liquid cargoes at temperatures differing from ambient temperature, including bow and stern sections, joined to the cargo midbody, which is at the temperature of the cargo, in such a manner as to maintain substantially ambient temperatures throughout the end portions of the tanker hull. Toward this end there is provided a temperature transition area or compartment at each end of the cargo midbody sections to minimize the thermal stresses that normally would occur between the cold hull of the midbody and the relatively warm hull at either end of the tanker. The entire hull is constructed as a continuous shell similar to that of a conventional vessel. The shell plating in the transition area is insulated internally and externally in such a manner as to reduce the temperature gradient between the cold hull steel of the midbody and the warm steel at the end. The insulation gradually is tapered along the shell so as to control the heat input to the plating as a function of the distance away from the cold midbody steel. This acts to extend the length of the thermal transition, thereby reducing the thermal gradient and resulting thermal stresses in the vessel''s hull.

Inventors

• 👤 Frank J Iarossi

Bibliographic Details