Elektrikseemile

Elektrikseemile is a neologistic term used in discussions of electric propulsion efficiency for vessels. It denotes the distance a vessel can travel on one kilowatt-hour of electrical energy under a defined set of test conditions. In practice, the metric is described in units of nautical miles per kilowatt-hour (nm/kWh) and serves as a simple way to compare energy performance across configurations or vessel types.

Etymology and scope: The word combines elements related to electricity and nautical distance, reflecting its role as a metric for electric propulsion in maritime contexts. It is intended as a neutral, descriptive term rather than a brand or standard, and is mainly used in theoretical analyses, pilot studies, and performance reporting.

Definition and measurement: Elektrikseemile is measured under a standardized protocol that fixes speed, sea state, hull condition, and propulsion setup. Electrical energy input is recorded from the energy storage system, with losses in charging or ancillary systems treated separately. Results can vary with wind, current, ballast, temperature, and hull cleanliness, so careful normalization is required for comparisons.

Applications and limitations: The metric is used in design optimization, simulation studies, and performance briefs to compare electric vessels. It is not yet universally standardized; different labs may adopt varying baseline conditions. Therefore, cross-study comparisons require explicit reporting of test parameters and operating conditions.

Examples and related concepts: A hypothetical electric ferry might achieve around 8 nm/kWh at moderate speed in calm conditions, while a high-speed craft could produce lower nm/kWh due to greater hydrodynamic losses. See also electric propulsion, energy efficiency metrics, and naval architecture.