Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
COGENERATION POTENTIAL ASSESSMENT IN CEMENT INDUSTRY
Submission Author:
Felipe Raul Ponce Arrieta , MG
Co-Authors:
Yago Aguiar, Marcelo Naves Marques, Guilherme Irokawa
Presenter: Felipe Raul Ponce Arrieta
doi://10.26678/ABCM.ENCIT2016.CIT2016-0447
Abstract
The evaluation of the potential for cogeneration in the cement industry aimed to study the cement manufacturing process in order to identify the possible sources for the recovery of waste heat and electricity generation. Several power generation technologies were study to carry out the potencial the generation power and estimates its implementation cost. To achieve the power calculations that can be generated in a cement plant, we initially determined the potential energy available in the pre-cyclone and the clinker cooler. For simulation purpose, it was used a cement process data referenced in the literature provisions of the parameters required for the calculation as flow, temperature and specific heat of the combustion gas. In Microsoft Excel software, an interactive spreadsheet to estimate energy cogeneration using four models of thermodynamic cycles was created. From the completion of the input data, one can estimate the energy generated power for "single flash" and "dual-pressure steam" Rankine cycles, Kalina cycle and Organic Rankine cycle. From the literature researched, we adopted the thermal efficiencies used for the calculations. The "single flash" Rankine cycle which has 25.7% of thermal efficiency achieved better results, and 11,188.56 kW of energy. In contrast, the Organic Rankine cycle was the one that generated less energy, 8968.27 kW, with a thermal efficiency of 20.6%. Despite "single flash" and "dual-pressure steam" Rankine cycles, have reached higher values of cogeneration in kW, calculation results suggests the continuation of the study applying data and real variables in the production process of a cement industry to the energy cogeneration potential calculations. In this sense, the use of the Kalina cycle has the possibility of varying the concentration of working fluid in each stage of the cycle and of raising the thermal efficiency.
Keywords
Waste heat Recovery, thermodynamic, Analysis of First Law Thermodynamic, Thermal Efficiency
