Generation Systems Overview

Shipboard power is supplied by main, auxiliary and emergency power generation systems. Power is distributed to ship systems by primary and secondary Power Distribution Networks (PDNs).

generating PDN schematics

PDN schematics appear frequently on vessel consoles, to assist with the management and monitoring of power distribution to the systems controlled by the console. Where a PDN schematic is required on a console, a schematic module is added in the required space using the Console Designer. The schematic may then be drawn in that space (or a pre-drawn schematic added).

PDN conduits

Power is distributed between power sources and vessel systems by conduits. Each conduit is designed for distributing a particular type of power and will have a maximum rating for the amount of power (current) it can handle.

PDN schematics overview

Power Distribution Network (PDN) schematics are included on consoles to provide an overview of available power sources and to allow for the configuration of those sources. Power sources and vessel systems connected to them are all represented on the PDN as*nodes. Nodes are connected by conduit* which are shown on schematics to provide an overview of available distribution pathways for power.

PDN nodes

Power distribution nodes are used to route and convert power across the vessel's network of power conduits.

power generation sub-system

The generation subsystem converts thermal energy (in the form of pressurised steam) to mechanical energy power by a turbine assembly which is then converted to electrical energy using an alternator assembly.

secondary coolant loop

The secondary coolant loop uses thermal energy from the primary loop to generate steam, which is transferred to the power generation subsystem.

reactor coolant system

The reactor coolant system is designed to remove thermal energy from the reactor and transfer it to a heat exchange system for the creation of steam, which is in turn used to drive a turbine for the generation of electrical power.

power distribution network

The vessel’s Power Distribution Network is a highly redundant, layered distribution system for delivering power from generation and auxiliary power sources to vessel systems.

primary coolant loop

The primary coolant loop is a closed-cycle system surrounding the reactor chamber that uses pressurised water to transfer thermal energy away from the reactor to the heat exchange.


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