Chiller optimization yields big savings for Italian ferry operator

La Spezia Image courtesy GNV

Italian operator GNV (Grandi Navi Veloci) is looking to gain savings of EUR 77,000 (about $87,000) a year as a result of using a new chiller optimization solution from ABB on board its ferry La Suprema.

The solution optimizes the performance of chillers used for heating ventilation and air-conditioning (HVAC) systems on passenger vessels.

The results of the first-of-its-kind retrofit of the technology in La Suprema exceeded all expectations.

“GNV is committed to investing in modern and advanced solutions to renew on-board systems and to improve the energy performance and consumption of our fleet,” said Mr. Antonio Campagnuolo, GNV Marine Operations Director. “Working together with ABB helps to achieve our goal of providing an efficient and safe transport service through important investments in energy-saving solutions of our fleet”.

Energy efficiency initiatives for ship operations generally focus on main propulsion, but ABB’s chiller optimization targets the substantial hotel load required for a HVAC system on board passenger ships.

Based on a target set for chiller optimization to save 10% of the energy used by chillers, pilot results cut consumption of power on board the ferry La Suprema by 18%. The results suggest that the owner will save 70 MWh of power every month, adding up to annual savings of up to EUR 77,000 EUR.

Actual energy consumption was depicted in real-time via an online dashboard. The results from the optimization solution consistently showed direct energy savings.

The technology draws on active monitoring on board and data processing ashore through a remote connection and only requires a local onboard controller to interface with the chiller control. Based on algorithms generated from real-time data, such as weather forecasts, active learning and 250 HVAC system variables, chiller energy use can be cut significantly without compromising on cooling capacity or indoor climate. All data analysis and energy saving calculations have been verified by an independent analyst, Into Trend.

“This is a prime example of the efficiencies that are possible for ships today when owners commit to ABB solutions for digitalization, connectivity and smart sensor technology,” said Daniele Patuelli, Vice President, ABB Marine & Ports Italy. “Our strategy envisages an electric, digital and connected future for shipping, and energy-saving solutions that help owners achieve sustainability benefits are a major milestone for this vision for the maritime industry.”