Techno-economic analysis of a low carbon back-up power system using chemical looping
| Autor: | M.E. Diego, Juan Carlos Abanades |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Pressure drop
Packed bed Back-up power Energy storage Renewable Energy Sustainability and the Environment business.industry 020209 energy Compressed air Nuclear engineering Fossil fuel Decarbonised electricity 02 engineering and technology Chemical looping CO2 capture Renewable energy Biogas 0202 electrical engineering electronic engineering information engineering Environmental science business Reactor design Chemical looping combustion |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | This work assesses the techno-economic viability of an innovative CO-free back-up power system. A novel chemical looping reactor is at the core of the process, where a pressurized air stream is heated up by the slow oxidation of a packed bed of reduced solids, before its expansion in a gas turbine to generate electricity. In this reactor, air flows through empty gas conducts with fully permeable non-selective perforated walls. Such gas conducts traverse the bed of solids longitudinally, so that the pressure drop is minimized. A diffusionally-controlled flow of oxygen is established through the gas permeable wall, which results in long oxidation times for the bed of reduced particles. A case example is described in this study, where a reactor that uses iron materials as oxygen carrier is designed to store renewable energy (an input of 1.4 MW of biogas) on a weekly basis and release it to supply a maximum power peak of 57 MW in the power discharge mode for more than 8 h. A packed bed reactor of 3.3 m I.D. and 50 m length is employed for this application, which is traversed by gas conducts of 0.04 m I.D., with 0.002 m wall thickness and a fraction of orifices in the wall of 0.12. A preliminary economic analysis of the novel system indicates that this low carbon configuration could be competitive against fossil fuel back-up alternatives in several scenarios, preferably with carbon prices exceeding 100€/t CO. M.E. Diego acknowledges the award of a “Juan de la Cierva-Incorporación” contract from the Spanish MICINN. |
| Databáze: | OpenAIRE |
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