Main purpose of project was to save energy, integrate more equipment and modernize system.
Short description of system:
A new energy efficient HVAC control system was installed during ship’s normal operation.
The ship has since it was built been extended, and new air handling units have been added at different occasions. Part of the project was to create a uniformed functionality for the whole system. This required Ethernet based communication to all PLCs, therefore the existing network was supplemented to cover all areas. In order to create a system consuming a minimum of energy another 20 frequency drives and CO2 sensors for public space air handling units were installed.
Indications for all fire dampers has also been moved over to new system, including a test sequence for each air handling units associated dampers.
As ship is on shore power when in port, much effort has been applied to automatically utilize shore power instead of onboard produced electricity and steam. This is accomplished by reading signal “Shore power connected” and “AUX engines running” to shift between pure electric heating and steam.
Cargo space onboard is divided into three areas. In order to implement demand control of cargo ventilation we have installed IP cameras that keep track of traffic in each cargo area. Each vehicle will increase ventilation capacity for a limited time. Gas detectors will always force ventilation to full capacity if gas levels goes above maximum limit. Bow door position, aft ramp position, bow thruster running and other signals have been used for a fully automated cargo ventilation control.
A system for pressure and temperature control of machinery spaces was installed in 2014. This system has been integrated into the new PC based supervision system, VIEWPORT.
Thus all accommodation, all cargo and machinery space ventilation is controlled from one system.
Material content in short:
- Automation for 25 Air handling units
- Pressure, temperature and CO2 control
- Pretreatment & Reheating control
- Existing Ethernet network has been extended to cover all devices
- Remote VPN connection
- Frequency drives for reheat water pump
- IP cameras for traffic control used for car deck ventilation control
- Gas detectors for keeping track of gas levels on car deck