Design and Stress Analysis of Extraterrestrial ... - The Black Vault

a special system is necessary, whereupon the beat carrier i•s passed
through the channels directly in the generator's stator. In this
case, the windings should be well insulated from the heat carrier.
The winding material (copper, silver) can be heated to a
temperature of -7000C and since the windings of the rotor are located
in the field of action of centrifugal forces, they will work in
the area of plastic deformations.
I
As an example of a system with a turbodynamo method of converting
(
heat energy into electrical energy, let us examine the diagram in
Fig. 3.11 [50]. The working parameters of a cycle are given on this
diagram. A nuclear reactor serves as the source of heat energy.
With the aid of a liquid-metal heat carrier (potassium and sodium
alloy) of the first system, heat f~om the reactor is transferred
to the steam generator.
V
i
The heat carrier of the second system in the steam generator
is heated, vaporized, and superheated and, in this state, it enters
a mercury turbine which brings into rotation the electric generator
and the pumps of' the first and second systems.
The mercury which has passed through the turbine goes through
the condenser and supercooler; then it enters the mercury Pump and
further - for cooling tile generator - and into the bearings.
Figure 3.12 shows a section of a combined rotating unit.
the unit on Qne shaft a mercury steam turbine, an electric generator,
• a mercury pump, and the pump for, the heat carrier of the first system
I (Na-K) [50] have been installed.
In
The turbine of the unit is a two-stage, axial turbine and
operates on a Rakine cycle; power generated is 7 hp at 40,000 r/min.
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