Abstract:
This work investigates a system that uses the reversible reaction CaCO3/CaO for energy storage. This system feeds on excess electrical energy for the endothermic decomposition of CaCO3 into CaO and CO2 (calcination). This reaction occurs in a solid-gas bed reactor that uses steam for fluidization, and the solid fraction remains in it. After the reaction, the CO2 is separated from the steam and enters a compression unit where it is pressurized before being stored at 110 bar. When an energy déficit occurs, the CO2 is expanded by a gas turbine and fed into the reactor, where exothermic absorption of CO2 on CaO takes place (carbonization). The large amounts of heat released in this process are used to generate high-pressure steam (110 bar and 520 °C), which is used in a conventional steam cycle to generate electrical power. In this way, the energy charging and discharging modes configure a cycle for the energy storage system. Thermodynamic simulations were performed in the IPSEpro process simulation software for the charging and discharging modes. For this purpose, mathematical models for the calcination and carbonation reactions were developed using the MDK module. These simulations were used to integrate over time, allowing the estimation of the progression of an entire cycle. Different cycles were evaluated for the conditions of interest, such as adding fresh CaCO3 before each cycle and different carbonation and calcination temperatures. In all cases, the production of 15 MW of electrical power was constant. In addition, the calculated data were used to determine power, thermal, and other efficiencies that facilitate system performance evaluation. Finally, the energy storage density of the system was evaluated under different conditions.
Citación recomendada (normas APA)
Jeinny Katerine Patiño Rodríguez, "Thermodynamic simulation of a high-temperature carbonate storage unit for integration into thermal power plants", Colombia:-, 2022. Consultado en línea en la Biblioteca Digital de Bogotá (https://www.bibliotecadigitaldebogota.gov.co/resources/3711777/), el día 2025-05-09.
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