133 strategies for reducing greenhouse gas emissions. It also carries out a full audit of anything onboard the ship that consumes energy to identify energysaving opportunities. “For cruise ships and ferries, HVAC typically has one of the biggest demands on electrical power, so this is a fairly common starting point,” says Wollesen. “The galleys can also yield significant efficiencies but they are a little trickier because so many are tied to operational nuances, such as how many heating plates the catering team want to have on standby. We work through every shipboard system that consumes power, optimising each individually and this delivers collective gains.” To make this process easier, KNUD E. HANSEN has developed a comprehensive tool that enables it to calculate the impact of different energysaving solutions – such as power supply from batteries or fuel cells – so it can evaluate which are best for helping the shipowner to achieve its goals in the context of the broader green transition strategy. For example, potential energysaving wins are weighed up against available budget and in some instances, KNUD E. HANSEN may recommend offloading ships in the fleet. “Every conceivable data set can be entered into the calculation tool so that if the owner wants to consider different technical options, we can see how each choice will impact everything else,” says Madsen. “This allows us to find the optimum configuration at the point of design specific to the ship and operational profile.” The firm conducts regular performance assessments for its clients, leveraging its powerful calculation tool to analyse current operations and identify areas where enhancements can be made. “With these data sets we can get a good idea about the optimisation opportunities that are likely to deliver the biggest return for the owner,” says Madsen. “We don’t just write a report to hand over to someone else; we also offer to provide design work to see the project to a successful conclusion. We’re talking about maybe a range of 20 to 100 opportunities for improvement across everything onboard that might collectively reduce energy consumption by 30 per cent.” Taking a holistic approach and developing a well-considered strategy eliminates the risk of shipowners making easy, one-off changes that may ostensibly save energy, but inadvertently compromise the results of other available options. “While a change might improve one system, it could negatively affect another,” says Madsen. “When we analyse an opportunity, we’re making thousands of trade-off decisions across an entire ship so we arrive at the best cumulative solution for the owner.” KNUD E. HANSEN employees analysing energy-saving challenges for shipowners
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