Session: 05-01 Thermochemical Energy Storage for CSP Applications

Paper Number: 115268

115268 - Development and Shakedown Testing of 1 Kwth Particle-to-Sco2 Heat Exchanger for Thermochemical Energy Storage Recovery 

The objective of this presentation is to showcase the design of a novel particle-to-sCO_2­ heat exchanger for extracting energy stored in thermochemically active metal oxide particles. This heat exchanger incorporates design elements to limit particle entrainment, enhance convective and radiative heat transfer from the particles while providing sufficient residence time to complete the re-oxidation process of the particles within the heat exchanger. The design of a 1 kWth prototype heat exchanger is presented, which features a counterflow shell and tube heat exchanger design where particles are fed by gravity from the top while air and sCO₂ flow in counterflow to the particles. The sCO₂ is contained within a heat exchanger core with sinusoidal wavy finned serpentine tubes to enhance heat transfer area while also creating a more torturous path for particles and air to increase particle residence time. Considerations for the design of the test facility and its auxiliary components are also presented, such as required instrumentation, heat exchanger core development, insulating casing and high temperature particle preheating. Finally, initial results from shakedown testing are presented.

Presenting Author: Bryan J. Siefering The Pennsylvania State University

Presenting Author Biography: Bryan Siefering is a graduate research assistant at The Pennsylvania State University.