ISO 8933-2:2024 船舶と海洋技術 — エネルギー効率 — 第 2 部:海洋機能システムのエネルギー効率 | ページ 6

3.1

energy efficiency

ratio or other quantitative relationship between an output (3.6) of performance, service, goods or energy, and an input (3.5) of energy

Note 1 to entry: Both input and output shall be clearly specified in quantity and be measurable.

[SOURCE:ISO/IEC 13273-1:2015, 3.4.1, modified — “and quality” deleted in Note 1 to entry.]

3.2

component

element performing only one function (3.4) and whose efficiency is defined by the ratio between input (3.5) and output (3.6)

3.3

functional system

collection of components (3.2) creating a system which performs a well-defined function (3.4)

Note 1 to entry: The components included in the functional system can be energy consuming or passive components. A functional system can also contain a system, controlling the operation of the components.

Note 2 to entry: The energy consumption of a functional system is not only defined by the efficiency of the individual components but is also influenced by the design of the integration between these components.

Note 3 to entry: A functional system is supplied by a single supplier who is responsible for the integration of the components, and the function and performance of the unit based on a set of boundary conditions defining the quality/amount of input (3.5) and output (3.6) .

3.4

function

operation that is performed by the system

Note 1 to entry: The function will have an output (3.6) characterized by the type and amount of output, i.e. treated volume/force/energy, and an input (3.5) in the form of consumed energy.

3.5

input

product, material or energy flow that enters a unit process

Note 1 to entry: Products and materials include raw materials, intermediate products and co-products.

3.6

output

product, material or energy flow that leaves a unit process

Note 1 to entry: Products and materials include raw materials, intermediate products, co-products and releases.

3.7

system boundary

boundary based on a set of criteria specifying which unit processes are part of the system under study