Abstract
The heating process of the cargo oil during transportation significantly impacts the boiler fuel consumption onboard oil tanker. To find methods of how to scientifically to determine the cargo oil heating time is the key to save energy during oil transportation. This paper analyzes the heating and thermal insulation process of 300 kinds of cargo oil onboard, 7 types of double-hull oil tanker of Dalian Ocean Shipping Co. In addition the theoretical analysis, test verification and actual application onboard, the influence of heat transfer mechanism, cargo oil physical properties and external factors to cargo oil heating and thermal insulation process are studied. Based on the non-steady-state lumped parameter method and taking into account five variables such as loaded capacity, ballast water, ship voyage record, hydro graphic-meteorology and heating steam parameters, optimized cargo oil heating and thermal insulation mathematical model were established. Finally, the calculation software and practical manual were developed. The optimized cargo oil heating system is currently used on 60000 DWT, 65000DWT, 68000DWT, 72000DWT, 75000 DWT, 110000DWT and 159000DWT oil tankers in Dalian Ocean Shipping Co. For one year's application, 4500 tons of oil fuel was saved. The implementation of this project in the company upgraded the scientific management level of cargo oil heating.
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