"Our primary goal is to reduce emissions," said Bill Burke, Carnival's chief maritime officer.

The goal is to reduce the company's carbon emissions by 40% compared to the 2008 baseline by 2030, and the carbon emissions level will peak in the 2011 Carnival.

Burke said this is a combination of efficiency and sustainability.

This involves not only new and efficient ships, but also the search for more efficient equipment for the company's existing fleet to ensure that the ship is running well, that is, the correct speed and the correct engine load.

"Voyage planning is another area of ​​our focus," Burke said. "This kind of thing is'free', and if we can do it right, it is free savings."

Burke sees HVAC system improvement as a key area where the company can save fuel costs and reduce carbon emissions.

"In the past few decades, the efficiency of the equipment has improved. If we haven't, we will replace the cooler and HVAC equipment," he said.

Burke said that 1 MW of savings is roughly equivalent to approximately $1 million in fuel per year.

"This is the money we can use for other things... This is the seed money to improve the efficiency of ships."

Burke said that the efficiency per passenger of a new ship is usually 20% higher than that of the previous ship, starting with the hull design.

Then is the process of searching for the best and most efficient equipment in the entire fleet. The British Carnival Shipbuilding Company focuses on this work.

With the new deliveries of AIDAnova, Costa Smeralda, Carnival Mardi Gras and P&O Iona, the Carnival sister brand now has four new ships with the same technology on the Carnival XL platform. Looking forward to a lot of note comparisons.

"We will compare performance, but a lot depends on the itinerary," Burke said, noting some variables such as the speed of the boat and the climatic conditions driving the use of air-conditioning.

To compare performance, the company uses climate zones to regulate energy use when reviewing data.

In the absence of propulsion load, it has become easier to use these data on ships in the port, and Carnival now requires its brand to operate with only one generator in the port.

"The brand will make adjustments and we will help them make targeted investments to reduce the hotel load, let them use a generator (in the port) to run first, and then reduce the load. We have reduced the electrical load by a few megabytes watt."

The ships are compared with each other through the adjustment of size and climatic conditions, and the Carnival uses its own port power coefficient to measure the power usage of the ship when it is docked.

By 2030, Burke envisions a fleet of what he calls a green fleet, with nearly 20% of Carnival’s ships powered by liquefied natural gas.

"Liquefied natural gas and non-liquefied natural gas ships will get part of the fuel from biofuels. Batteries will be installed on many ships for peak shaving, and non-liquefied natural gas ships will run advanced air quality systems (scrubbers)," Burke said .

Those ships running scrubbers will filter the washing water and significantly reduce particulate matter.

"All ships will achieve our port power factor target and use a diesel generator to easily operate in the port under all climatic conditions, which shows that the port hotel services are highly efficient."

Another project is a single fleet-wide maintenance and procurement system.

"This will allow us to make better use of our scale and eliminate excess inventory."

Burke also plans to add more courses to the company's Arison Maritime Center (CSMART) in the Netherlands.

"In addition to training our officer cores for operation teams, we have also conducted energy efficiency training, and we will expand the scope of training."

Burke continued that many ships will be equipped with air lubrication systems, adding that by 2030, approximately 60% of the fleet will have access to shore power. Another three-quarters of the fleet will be equipped with advanced wastewater purification systems, and all ships will be equipped with food waste digesters.

"Our ships will be equipped with complete instruments to measure the efficiency of our maximum power consumption... You must be able to measure (consumers) to know your performance."

Burke said that the data will lead to self-correction behavior, thereby improving operational efficiency. He said these ships will continue to gain more sensors and measurement capabilities.

"We will successfully design and build our first zero-emission and zero-emission ship...This is the biggest challenge, and we hope that our cooperation with LNG will prepare us for the next fuel."

From the Cruise Industry News Quarterly: Fall 2021 

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