Retrofitting vessels with Energy-Saving System, enables the ship's crew to dynamically adjust the performance of the pump and HVAC systems based on the ship’s speed, water temperature, and weather conditions. This adaptability ensures energy is used only where and when it is needed.
- Palle Grankvist, Business Development Manager, Hoyer
What is Hoyer ESS?
Hoyer ESS is a highly customisable application for marine vessels that combines the use of Variable Speed Drives (VSDs), sensors, and automation to significantly reduce energy consumption and optimize the operation of cooling pumps and engine room fans.
The ESS analyzes real-time data and dynamically adjusts the speed of fans and pumps via frequency converters to match operational demands, such as sailing speed, water temperature, and ventilation requirements.
Significant reductions for a European ship owner
A European shipowner retrofitted their vessel with Hoyer ESS to optimise energy use across critical components. This enabled them to achieve significant reductions in both energy use and air pollutant and carbon emissions and a ROI of less than 2 years.
Implementations
4 engine room fans
(22 kW duty point per fan, 1752 RPM, 75,000 m³/h capacity)
3 seawater cooling pumps
(85 kW duty point per pump, 580 m³/h capacity, 25 m head)
3 LT Freshwater cooling pumps
(51.3 kW duty point per pump, 384 m³/h capacity, 30 m head)
Results
Total savings
Energy: 1,416,832 kWh/year.
Fuel: 290.5 tons/year.
Annual costs: $169,283.30
Environmental impact
CO2 reduction: 628.4 tons/year.
SOx reduction: 12.1 tons/year.
NOx reduction: 20.1 tons/year.
Return on investment
Total Investment: $280,000 (hardware + installation).
Payback Period: 1.65 years.
ROI: 55% annual savings post-payback.
Download whitepaper
Read more about Hoyer ESS and explore the opportunities for energy optimisation of engine room fans and cooling pumps in this whitepaper.