District Heat And Waste Heat To Cities

The neutron-driven and residual heat a burner produces can serve district heating, using near-load siting to deliver warmth as well as power.

Heat is a resource, not only a loss

Direct energy conversion turns most of the charged-particle power into electricity, but a burner still produces heat: 5.44 percent of fusion power is carried by neutrons, and there are residual thermal losses in the machine and power electronics. In a plant far from people this heat is rejected. Sited near a city, it can instead serve district heating.

District heating distributes hot water through a network to warm buildings. A near-demand burner (MetroVolt) could supply this heat as a by-product of firm electricity, improving overall energy use in cold-climate cities where heating demand is large.

Combined heat and power

Delivering both electricity and useful heat is combined heat and power (CHP). It raises the fraction of fuel energy put to use. For MetroVolt, the electricity is primary and comes from DEC; the heat is a secondary output that near-load siting makes usable rather than wasted.

Honest framing

District heat is an opportunity that depends on siting near a heat network and on the plant's residual heat being at a useful temperature. It is a secondary benefit, not a driver, and like everything here it is design-stage. It does not change the water story: DEC still removes the large evaporative cooling draw.