There is a Capstone microturbine in the classic 1950s superyacht, Istros, that Optimal has been servicing since 2023.
Istros was originally built in 1954 by the Dutch, and in 2019, was completely rebuilt with modern technologies, features and amenities, such as an internet-based TV system, wireless phone chargers, flat panel antennas and a Capstone microturbine that spins on air bearings to power them all.
This was the first marine-approved microturbine ever installed on a superyacht, specifically engineered for maritime applications. The system delivers direct current (DC) power, which charges a connected peak-shaving battery pack. From there, the main busbar is supplied via a DC-AC converter.
This was the first marine-approved microturbine ever installed on a superyacht, specifically engineered for maritime applications.
By eliminating the AC to DC conversion step, the microturbine achieves higher efficiency and produces extremely low emissions, which is an important consideration for sustainable marine operations.
One of the standout features of the microturbine is its near-silent operation. Vibrations and pulsating exhaust noise are virtually non-existent, meaning there’s no need for additional noise or vibration attenuation measures.
On many classic yachts that get rebuilt, the funnel (smokestack) just becomes an ornament, sometimes used for the storage of deck chairs or brooms and brushes. In the modern Istros, even the funnel retains its original purpose, channelling the clean exhaust produced by the microturbine.
The name Istros, meaning “inspiration,” is fitting. This vessel demonstrates how advanced technologies can be seamlessly integrated into classic designs, setting a precedent for sustainable power solutions in the maritime industry.