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Passenger Ship Technology

Chiller optimisation cools onboard power demand

Tue 12 Mar 2019 by Gavin Lipsith

Chiller optimisation cools onboard power demand
Algorithms based on real-time information including weather and HVAC variables have cut chiller power use

Italian shipping company Grandi Navi Veloci (GNV) has cut power demand by 18% on 2,920-passenger ferry La Suprema by installing a digital system to optimise its use of chillers.

The technology uses on-board monitoring and data processing ashore, with a local onboard controller to adjust the chillers as needed. Optimisation is made through algorithms derived from real-time data sources (including weather forecasts) as well as machine learning and monitoring of 250 variables associated with the vessel’s heating, ventilation and air conditioning (HVAC) system.

Based on a target of saving 10% of the energy used by chillers, pilot results - verified by independent analyst Into Trend - cut power consumption by 18%. Applied continuously this would save the owner 70 MWh of power each month, with annual savings of up to €77,000 (US$86,400)



The optimisation project is unusual in focusing on energy consumption by HVAC systems and more generally on the hotel load, contrasting with the propulsion focus of many energy saving projects.

GNV marine operations director Antonio Campagnuolo said that the project was an example of the owner investing in “modern and advanced solutions to renew on-board systems and improve energy performance and consumption”.


Projects that improve efficiency are eligible for nomination in several categories at the Marine Propulsion Awards. Make your nominations before 24 March.

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