The Heat-Sinks is a location in Isaac Asimov's Foundation series.
Description[]
The Heat-Sinks are the primary geothermal energy production facilities of the Dahl Sector on Trantor. Located deep underground where Trantor's magma layer is closest to the surface, the heat-sinks are a sweltering, cavernous complex that provides vital power for the planet-wide city. The environment is intentionally kept dimly lit for psychological reasons, as bright light is mentally associated with increased heat for the workers. The actual work is performed by massive, efficient thermopiles that directly convert the planet's internal heat into electricity, a process so complex that it is largely managed by computers and not fully understood by the local workforce. The facilities are staffed by high-paid peons (heatsinkers) who work in shifts amidst oppressive heat and dryness, requiring constant hydration with electrolyte-replenishing fruit juices.
It was within this harsh and technologically advanced setting that Hari Seldon, during a tour guided by Hano Lindor in "C-3" level, was recognized by the brilliant heatsink worker Yugo Amaryl, a meeting that would ultimately provide Seldon with his most crucial colleague in the development of psychohistory.