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Passive heat pipes filled with liquid sodium transfer the reactor core heat to one or more free-piston Stirling engines, which produce reciprocating motion to drive a linear electric generator. [12] The melting point of sodium is 98 °C (208 °F), which means that liquid sodium can flow freely at high temperatures between about 400 and 700 °C ...
A modern Stirling engine and generator set with 55 kW electrical output, for combined heat and power applications. At high temperatures and pressures, the oxygen in air-pressurized crankcases, or in the working gas of hot air engines, can combine with the engine's lubricating oil and explode. At least one person has died in such an explosion. [73]
A Stirling radioisotope generator (SRG) is a type of radioisotope generator based on a Stirling engine powered by a large radioisotope heater unit. The hot end of the Stirling converter reaches high temperature and heated helium drives the piston, with heat being rejected at the cold end of the engine.
A Stirling engine eliminates the need for water anywhere in the cycle. This would have advantages for nuclear installations in dry regions. United States government labs have developed a modern Stirling engine design known as the Stirling radioisotope generator for use in space exploration. It is designed to generate electricity for deep space ...
Pages in category "Stirling engines" ... Stirling radioisotope generator; Stove fan This page was last edited on 3 January 2014, at 15:52 (UTC). ...
The engine has near isothermal cylinders because 1) the heater area covers the entire cylinder end, 2) it is a short stroke device, with wide shallow cylinders, yielding a high surface area to volume ratio, 3) the average thickness of the gas space is about 0.1 cm, and 4) the working fluid is Helium, a gas having good thermal properties for Stirling engines.
In mechanical engineering, the Beale number is a parameter that characterizes the performance of Stirling engines. [1] It is often used to estimate the power output of a Stirling engine design. For engines operating with a high temperature differential, typical values for the Beale number are in the range 0.11−0.15; where a larger number ...
Diagram of an RTG used on the Cassini probe. A radioisotope thermoelectric generator (RTG, RITEG), sometimes referred to as a radioisotope power system (RPS), is a type of nuclear battery that uses an array of thermocouples to convert the heat released by the decay of a suitable radioactive material into electricity by the Seebeck effect.
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