Water Use & Direct Energy Conversion

Because DEC removes the steam cycle, the only heat left to reject is the small neutron and loss fraction, so the burner needs almost no water.

Why thermal plants are thirsty

A thermal power plant's water use is dominated by condensing steam. To close the Rankine cycle, spent steam must be turned back to water, and that condensation dumps a large amount of low-grade heat — typically the majority of the fuel's energy — into cooling towers (evaporating water) or into a river (drawing and warming large flows). The thirst is a direct consequence of running a heat engine.

What is left to cool in the burner

With direct conversion doing the bulk of the work, the only heat that must be rejected is the neutron fraction (~5.44% of power) plus converter losses — collector interception, ohmic dissipation, and radiation. That residual is a small share of total power, so the cooling duty is small in proportion, and it can be handled with closed-loop cooling rather than open evaporative towers or large river draws.

Why this changes siting

• A generator that needs almost no water is not tied to a river or coast.
• It can be placed next to a data center or inside a city, where the load is.
• It sidesteps the growing conflict between large cooling-water demand and local water stress.

Honest framing

‘Almost no water’ does not mean zero: some closed-loop cooling for the residual heat and for magnet and equipment thermal management is still needed, and that loop can be dry-cooled. The point stands that removing the steam cycle removes the dominant water demand. This is the physical basis for MetroVolt answering the data-center water problem; the burner remains a design-stage machine with a test unit targeted around 2032.