Nautical Term: EEDI
Definition of EEDI
The Energy Efficient Design Index, commonly referred to as EEDI, is a metric used to quantify the energy efficiency of a marine vehicle, such as a cargo ship or a passenger ferry. EEDI is expressed in grams of carbon dioxide per tonne-mile, and is calculated based on the design parameters of the marine vehicle, including its length, beam, displacement, and engine power.
For example, suppose that a shipping company is designing a new cargo ship with a length of 200 meters, a beam of 40 meters, a displacement of 120,000 tonnes, and four engines, each with a power output of 15,000 horsepower. Based on these design parameters, the Energy Efficient Design Index for the new cargo ship would be calculated by a marine engineer or a naval architect, using specialized software and the relevant design data.
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