At Carnival Corporation, Diana Sanchez interviewed crew members and analyzed operations onboard several cruise ships to identify energy efficiency projects in lighting, HVAC and kitchen hardware.
In terms of lighting, Sanchez identified areas on the ship that leave their lights on 24 hours a day, even though they are utilized only about a third of that time. She recommended that Carnival install occupancy sensors, which would shut the lights off when the areas are unoccupied and could save the company approximately $16,000 per year.
To improve HVAC efficiency, Sanchez recommended installing frequency converters on the fans of air handling units in several public spaces. This could capture annual savings of more than $25,000.
In cruise ship "galleys," or kitchens, Sanchez recommended replacing current equipment with ENERGY STAR appliances, when it is replaced. This could save Carnival approximately $11,000 per year.
These recommendations, in addition to others made by Sanchez, could save Carnival more than 400,000 kilowatt hours annually on every ship. Her recommendations could be scaled across the entire Carnival fleet - 124 ships.
Together, the energy efficiency opportunities Sanchez identified onboard Carnival's ships could save the company $52,000 or more, as well as 400,000 kilowatt hours of electricity.