Dynamic Simulation of Fixed‐Bed Chemical‐Looping Combustion Reactors Integrated in Combined Cycle Power Plants

Abstract

Chemical‐looping combustion (CLC) is a promising and efficient method for power generation with in situ CO2 capture. In this work, we focus on high‐pressure fixed‐bed CLC reactors integrated with combined cycle (CC) power plants. Specifically, the dynamic nature of fixed‐bed chemical‐looping reactors and the many kinetically controlled reactions necessitate the use of dynamic modeling to evaluate power plant performance, efficiency, stability, and feasibility under transient operation. We present a dynamic model for an integrated CLC–CC power plant and transient analyses of the integrated plant performance. A network of dynamically operated fixed‐bed reactors fed with natural gas comprises the CLC plant component. A dynamic model is developed and tuned to match the performance of a commercial combined cycle power plant. The transient variations of the integrated plant in terms of power, temperature, and pressure profiles are presented. The simulation results show that despite the inherent batch‐type operation of the CLC reactor, the operation of the combined cycle is relatively unaffected, and there are small oscillations of approximately 2 % around the desired steady‐state conditions.

Dynamic modeling, simulation and optimization of a subcritical steam power plant. Part I: Plant model and regulatory control

“…We chose the Modelica language for this simulation, in particular Dymola, because of its acausal structure and extensive libraries of components relevant to thermal cycles. In the past, the ThermalPower library of Dymola has been used to dynamically simulate ORC [24], IGCC [23], and CC-CLC plants [27].…”

“…Casella et al [23,24] developed models for the dynamic simulation of Organic Rankine Cycles (ORC) and Integrated Gasification Combined Cycles (IGCC), using the Modelica language [25] and component models from the ThermalPower library [26]. Chen et al [27] developed a system-level dynamic model of a combined cycle power plant integrated with chemical-looping combustion and the model was validated at steady-state against commercial plant data. Wang et al [28] presented work on parametric optimization of supercritical coal-fired power plants.…”

Dynamic optimization of fixed bed chemical-looping combustion processes

“…In a subsequent work we demonstrate the application of this optimization-based approach to advanced fixed bed reactor concepts of CLC systems, 77 as well as integrated chemical-looping combined plant optimization. 78…”

Comparative Performance Assessment of 300 MW Solar‐Coal Hybrid Power Generation System Under Different Integration Mechanisms

“…In line with the 21st century's sustainable development policy, there has been talked of revisiting conventional power generation technologies and changing into environmentally friendly and green power generation technologies, and related research around the world is intensified, and new technologies introduced into a power generation practice. Today, the world is moving away from power generation technology based on direct combustion and trying to build the environmentally friendly power generation technologies, such as integrated gasification combined cycle power plant, [1] gas turbine power plant, [2] solar-fossil fuel hybrid power plant, [3] and renewable energy-based alternative power generation technologies. [4][5][6] Nowadays, solar energy can be converted into electricity via solar photovoltaic and concentrating solar power (CSP) technologies.…”