Dumarey deployed a Peak Power 200 flywheel system on a tower crane to enable significant generator downsizing, reducing fuel consumption, operating costs, and emissions.
Clients:
BAM Ireland
Industries:
Applications:
Generator downsized from 220 kVA to 80 kVA, delivering approximately €380 weekly fuel savings and up to 49 tonnes of CO₂ reduction annually.
BAM Ireland operates a Wolffkran 7032FL, a 12-tonne capacity tower crane, in a crane storage yard. This crane is mounted on rails with a travelling frame, allowing it to service the entire yard. When powered by diesel generators, BAM typically used a 220 kVA Cummins generator to handle the crane’s dynamic load profile, which includes:
This resulted in:
BAM sought to determine whether generator downsizing was possible without compromising crane performance.
The testing demonstrated that significant generator downsizing could be achieved without compromising crane performance:
Operational insights showed:
Additional benefits include reduced costs associated with transporting, deploying, and maintaining smaller generators.
Dumarey deployed the Peak Power 200 flywheel system alongside progressively smaller generators to identify the optimal configuration.
Two approaches to downsizing were considered:
The testing process included:
The system successfully handled all demands, with data logged remotely and analysed in real time. Further testing was conducted using a 66 kVA generator:
Final analysis determined that an 80 kVA generator combined with Peak Power 200 provided the optimal balance.
The Peak Power 200:
Delivers instant power to manage dynamic crane loads
Reduces generator size, fuel consumption, and operating costs
Ensures performance is maintained during high-demand operations
Improves overall system efficiency and reduces emissions
litres of fuel saved per week
€ weekly cost savings
tonnes of CO₂ avoided per year
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