A new approach to marine ventilation

Air conditioning is the single largest domestic electrical load on most marine vessels. To reframe that, cooling requires a lot of power.

When using readily available fossil fuels, this isn’t something yacht designers spend much time on, but in a situation where a yacht runs entirely on renewable energy this becomes a management challenge — especially when the marine sector lags behind the residential world.

To help confront this issue, the team behind sailing yacht Zero approached Termodinamica. And the outcome of this partnership? A specialised thermal management solution that moves beyond traditional cooling to address energy consumption at its source.

The core innovation of this new system is dynamic, sensor-driven ventilation. Standard yacht ventilation operates on a constant-volume basis, drawing in large quantities of external air regardless of how many people are on board and where they are.

The problem is that this ambient air is often hot or humid, which places a massive load on the cooling system. But, by integrating CO2 and humidity sensors around the vessel, Termodinamica’s technology can precisely change fresh air intake depending on who’s in the room.

By cooling only the air necessary for the present occupants, the system drastically reduces the vessel's overall heat load before the cooling process even begins.

This architecture is supported by Termodinamica’s established Direct Expansion (DX) technology. Unlike the chilled water systems traditional in the maritime industry, the DX approach circulates refrigerant directly to the air handlers.

All this comes together to reduce total power consumption for climate control by up to 70%.

In this success story, we can find a kernel of what makes a project like sailing yacht Zero so intriguing. Because the vessel is forced to operate under strict parameters, it finds unique and novel ways to save energy, something that the entire marine sector can benefit from in the future.

Thermal management might not be the first thing people consider when talking about sustainable maritime engineering, but this project proves it’s one of the most important.