ISO 8933-2:2024

International
Standard
ISO 8933-2
First edition
Ships and marine technology —
2024-08
Energy efficiency —
Part 2:
Energy efficiency of maritime
functional systems
Navires et technologie maritime — Efficacité énergétique —
Partie 2: Efficacité énergétique des systèmes fonctionnels
maritimes
Reference number
© ISO 2024
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Published in Switzerland
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Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 2
5 Methods to evaluate the energy efficiency of maritime functional systems. 3
6 Pressure and flow functional systems . 4
6.1 General .4
6.2 Ballast water management system .5
6.2.1 General .5
6.2.2 Ultraviolet treatment systems .6
6.2.3 Electro-chlorination treatment systems .8
6.3 Freshwater generator .10
6.3.1 General .10
6.3.2 Definition of input and output .11
6.3.3 Definitions of boundaries and media .11
6.3.4 Calculation method .11
6.3.5 Measuring method . 13
6.3.6 Example of measuring and calculations .14
6.4 Seawater cooling system . 15
6.4.1 General . 15
6.4.2 Definition of input and output . 15
6.4.3 Definitions of boundaries and media . 15
6.4.4 Calculation method .16
6.4.5 Measuring method .17
6.4.6 Example of measuring and calculation .17
6.5 Freshwater cooling system .18
6.5.1 General .18
6.5.2 Definition of input and output .18
6.5.3 Definitions of boundaries and media .18
6.5.4 Calculation method .19
6.5.5 Measuring method . 20
6.5.6 Example of measuring and calculation . 20
6.6 Engine lube oil system .21
6.6.1 General .21
6.6.2 Definition of input and output .21
6.6.3 Definitions of boundaries and media .21
6.6.4 Calculation method . 22
6.6.5 Measuring method . 23
6.6.6 Example of measuring and calculation .24
6.7 Steam boiler system, thermal fluid system and hot water system .24
6.7.1 General .24
6.7.2 Definition of input and output . 25
6.7.3 Definitions of boundaries and media . 25
6.7.4 Calculation method . 26
6.7.5 Measuring method .27
6.7.6 Example of measuring and calculation . 28
6.8 Cargo pump system . 29
6.8.1 General . 29
6.8.2 Definition of input and output . 29
6.8.3 Definitions of boundaries and media . 29
6.8.4 Calculation method . 30

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6.8.5 Measuring method .31
6.8.6 Example of measuring and calculation .31
6.9 Cargo heating system .32
6.9.1 General .32
6.9.2 Definition of input and output .32
6.9.3 Definitions of boundaries and media .32
6.9.4 Calculation method . 33
6.9.5 Measuring method . 34
6.9.6 Example of measuring and calculation . 34
6.10 Volatile organic compound recovery system . 34
6.10.1 General . 34
6.10.2 Definition of input and output . 34
6.10.3 Definitions of boundaries and media . 35
6.10.4 Calculation method . 35
6.10.5 Measuring method . 36
6.10.6 Example of measuring and calculation .37
6.11 Separator system .37
6.11.1 General .37
6.11.2 Definition of input and output . 38
6.11.3 Definition of boundaries and media .
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