Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
EXERGY ANALYSIS OF A SUPERCRITICAL COAL-FIRED POWER PLANT AT VARIOUS LOAD CONDITIONS
Submission Author:
Danilo Rocha , MG
Co-Authors:
Danilo Rocha, Rogério José Silva
Presenter: Danilo Rocha
doi://10.26678/ABCM.ENCIT2018.CIT18-0236
Abstract
Promote the increased efficiency of power plants to minimize the resultings impacts from the process, in this sense to identify the place and magnitude of the system irreversibility is essential. The proposal of exergy analisys as a way of determine thermodynamic inefficiencies is widely used and offers good results to later analyzes, either from the thermodynamic point of view, or as a potential indicator of environmental impacts. Several authors have developed studies in this area for various energy generation systems and have been identifying the equipment and processes that most contribute in the destruction of exergy within the system. The objective of this work is to discuss the exergetic performance of a supercritical coal-fired power plant at three different operating load conditions, in order to assess the impact of the partial load on efficiency. It was identified a significant decrease of the efficiency for low pressure turbine when operated in partial load, the boiler subsystem has been responsible for the greater part of irreversibilities in the system, and in general the overall efficiency of the plant presented reduction for operation in partial loads. It is understood that it would be prudent to prioritize improvements in the boiler subsystem, as well as the partial load condition damages the plant efficiency and, consequently, a greater imposition on natural resources.
Keywords
Load Conditions, Coal, Supercritical, Efficiency, Exergy Analysis
