RadTES-CS/Radial Packed-bed Thermal Storage System Using Copper Slag as Storage Medium - 2023/2025

This work presents the design, construction, and testing of a radial-flow packed-bed thermal storage system (RadTES-CS), using copper slag as the storage medium. Copper slag, an industrial byproduct with good thermal capacity and high density, is proposed as a cost-effective and sustainable alternative to conventional materials.

The system is based on a radial configuration that enhances thermal distribution and storage efficiency. An experimental prototype was built, and thermal charge/discharge tests were conducted to evaluate the behavior of the thermal front, energy efficiency, and heat losses. The results show that copper slag is a viable medium for thermal storage, demonstrating good performance and potential for application in solar thermal systems. However, challenges were identified related to material variability and the optimization of the design at larger scales.

Funding Program: FONDEF

Project Duration: 24 months

Principal Investigators: José Miguel Cardemil, Rodrigo Escobar