Assessment of Coal Fly Ash as a Thermal Energy Storage Material for Concentrating Solar Power

Megan Bellusci, Western Washington University
Kiana Oos, Western Washington University
Deborah Glosser, Western Washington University
Drew Johnson, Western Washington University

Description

Use of Unconventional Fly Ash as Sensible Particulate Thermal Energy Storage Materials for Concentrating Solar Power Authors Ms. Megan Bellusci - United States - Western Washington University Ms. Kiana Oos - United States - Western Washington University Dr. Deborah Glosser - United States - Western Washington University Mr. Drew Johnson - United States - Western Washington University Dr. Prannoy Suraneni - United States - University of Miami Abstract Coal fly ash is an attractive alternative to sintered bauxite proppants for sensible thermal energy storage (TES) in high-temperature (HT) direct absorbing receiver concentrating solar power (CSP) technology. These waste materials are low-cost, low-carbon, and abundant, however, they can be highly variable and heterogeneous. We present the results of a characterization study of the optical and thermochemical properties of several unconventional fly ashes (either off-spec or reclaimed) which have been exposed to CSP operating conditions. We show how ash composition influences factors such as solar absorptance and specific heat capacity, and present results of experiments to optimize ash properties of HT TES. Study results show that reclaimed fly ashes are promising substrate material for solar thermal energy storage.

 
May 14th, 3:30 PM May 14th, 5:00 PM

Assessment of Coal Fly Ash as a Thermal Energy Storage Material for Concentrating Solar Power

Grand Rapids, Michigan

Use of Unconventional Fly Ash as Sensible Particulate Thermal Energy Storage Materials for Concentrating Solar Power Authors Ms. Megan Bellusci - United States - Western Washington University Ms. Kiana Oos - United States - Western Washington University Dr. Deborah Glosser - United States - Western Washington University Mr. Drew Johnson - United States - Western Washington University Dr. Prannoy Suraneni - United States - University of Miami Abstract Coal fly ash is an attractive alternative to sintered bauxite proppants for sensible thermal energy storage (TES) in high-temperature (HT) direct absorbing receiver concentrating solar power (CSP) technology. These waste materials are low-cost, low-carbon, and abundant, however, they can be highly variable and heterogeneous. We present the results of a characterization study of the optical and thermochemical properties of several unconventional fly ashes (either off-spec or reclaimed) which have been exposed to CSP operating conditions. We show how ash composition influences factors such as solar absorptance and specific heat capacity, and present results of experiments to optimize ash properties of HT TES. Study results show that reclaimed fly ashes are promising substrate material for solar thermal energy storage.