It won’t probably be on top of your mind when you’re thinking of greener shipping, but this is definitely one: The optimisation of air conditioning onboard ships. On our ferry PEARL SEAWAYS, sailing between Oslo and Copenhagen, they gained environmental benefits by adjusting the air conditioning while still keeping the inner climate up to standards. And the latter is important, because a good working air conditioning is crucial for a comfortable, healthy inner climate when travelling on our ferries.
Be creative for ‘greener shipping’
The air conditioning on the DFDS Seaways ferry PEARL SEAWAYS runs continuously, has the capacity for 2000 people, and is designed to work in extreme temperatures: From -40 degrees Celsius to +40 degrees Celsius. ‘These are extreme circumstances and we realised that it can actually be run much more efficiently, because 99.8% of the time we are nowhere near these conditions. The system has now been adjusted so that it adapts to the weather conditions outside and the actual conditions on board. As a result, the power and boiler consumption have been reduced significantly,’ says Jesper Odder, First Engineer onboard the ferry.
Downstairs in the engine rooms
And these are not the only ventilations onboard. If we go down to the engine rooms, we see large fans supplying the main and auxiliary engines with air for the combustion process of oil. We realised that we could also adjust these ventilation systems, due to the fact that we have had a recent propeller optimisation and because we are also hardly near the extreme conditions for which this ventilation system is made. The new system is ‘greener’ and adjusts itself according to the actual room temperature and the air requirements from the combustion process in the engine.
‘Overall, the inner climate has improved, the wear and maintenance of the air conditioning systems and fans have been reduced and we have gained environmental and financial benefits. A comparison between Christmas Eve 2013 with 2012 shows that the amount of CO2 produced is 2.5 kg per liter of combusted fuel,’ adds Jesper. We definitely believe that this is a good result that can be added to ‘greener’ shipping at DFDS Seaways. (Source: DFDS)