Particle-to-sCO(2) Heat Exchanger Experimental Test Station Design and Construction

Design and construction of a particle-to-sCO(2) heat exchanger test station is described in this paper. The purpose of this test station is to make steady-state measurements of thermal performance with sCO(2) as the working fluid. While the test station was initially constructed to test a 20 kW heat exchanger developed under the Gen3 Particle pilot plant (G3P3) project, it also was designed to accommodate testing of other heat exchanger configurations. Improvements for this test station design is based on lessons learned from prior heat exchanger testing. Maximum pressure and temperature ratings are based on the desire to use primarily stainless steel in the construction to reduce cost and lead time of components. Construction of the test station was completed and commissioning and initial testing took place during the October to November 2020 timeframe.