Design, Fabrication and Testing of a 15-kW Gas-Fired Liquid-Metal Evaporator

Paper #:
  • 929177

Published:
  • 1992-08-03
Citation:
Adkins, D. and Rawlinson, K., "Design, Fabrication and Testing of a 15-kW Gas-Fired Liquid-Metal Evaporator," SAE Technical Paper 929177, 1992, https://doi.org/10.4271/929177.
Pages:
9
Abstract:
This paper describes the development and testing of a compact heat-pipe heat exchanger that is designed to transfer thermal energy from hot combustion gases to the heater tubes of a 25-kWe Stirling engine. In this system, sodium evaporates from a surface that is heated by a stream of hot gases and the liquid metal then condenses on the heater tubes of a Stirling engine where energy is transferred to the engine's helium working fluid. Recent tests on a prototype unit illustrated that a compact (8 cm x 13 cm x 16 cm) sodium evaporator can routinely transfer 15-kWt of energy at an operating vapor temperature of 760°C. Four of these prototype units will eventually be used to power a 25-kWe Stirling engine system. Design details and test results from the prototype unit are presented in this paper.
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