Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
ASSESSMENT OF A RANKINE CYCLE FOR COGENERATION IN CEMENT INDUSTRIES
Submission Author:
Nathália de Assis Gomes , Buscando endereço... , Brazil
Co-Authors:
Nathália de Assis Gomes
Presenter: Nathália de Assis Gomes
doi://10.26678/ABCM.COBEM2021.COB2021-0356
Abstract
The aim of this paper is to analyze, thermodynamically and economically, the application of a conventional Rankine cycle for Waste Heat Recovery (WHR) and power generation in cement industries. The cement production is a process that consumes and wastes a lot of energy, about of 40 % of the total energy consumed for the cement plants is lost in the form of heat. Therefore, in order to improve the performance of this type of factory, the development and application of WHR technologies becomes necessary and important. The worst sources of waste heat in the cement industries are the cyclone pre-heater and the clinker cooler, as these equipment are the responsible for the system main loss, they were chosen as object of this study. The theoretical and actual Rankine cycles were modeled with the General Electric GateCycleTM program (Version 6.0). The data used in the cycles developing were taken from the Apodi cement manufacturing plant, which contains a WHR system installed. The actual cycle modeled produces 6.29 MW, considered an optimum setting of the system, which corresponds to 21 % from the total electric energy demand of the Apodi plant. An economic feasibility study was made, and it showed that, for a net present value around R$ 69 million investment, the payback time is 3.3 years after the commissioning of the cogeneration plant.
Keywords
cogeneration, Waste heat Recovery, Rankine cycle, Power generation, Cement industry
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