Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
THERMOECONOMIC OPTIMIZATION OF ABSORPTION CHILLER SUPERSTRUCTURES FOR AN INTERNAL COMBUSTION ENGINE; WASTE HEAT RECOVERY AND COLD-WATER APPLICATIONS
Submission Author:
Andre Chun , ES , Brazil
Co-Authors:
Andre Chun, Alexandre Morawski, LEONARDO ARAUJO, Renan Cristofori Lima de Oliveira, Marcelo Aiolfi Barone, Manuel Schiaffino, João L M Donatelli, José Joaquim Conceição Soares Santos, Carla César Martins Cunha, Allan Valiati
Presenter: Andre Chun
doi://10.26678/ABCM.ENCIT2018.CIT18-0571
Abstract
The utilization of thermal power plants using internal combustion engines has been performed a bigger role on electrical energy generation section in Brazil. UTE Viana power plant accounts on twenty internal combustion engines that release a significant amount of residual heat to the environment through jacket water and exhaust gases. Due to this reason, the application of heat recovery technologies may be fundamental to offer possible benefits. In particular, lithium bromide (LiBr) and water absorption chillers provide a cold-water system whose applications on UTE Viana might be performed through the installation of heat exchangers on radiators, HVAC system and on the intake air of the engine, thus, reducing electrical energy consumption, specific fuel consumption and increasing shaft power generation. Therefore, the goal of this work is to achieve the optimal configuration from the structural and parametric point of view on absorption chillers with cold-water system applications using superstructure optimization methodology, which allows embracing several chiller configurations. The superstructure modeling is carried out in EES for three absorption chiller designs: single effect driven by hot water or exhaust gases and Double Effect driven by exhaust gases. The results showed absorption chillers optimal configurations for UTE Viana in terms of thermoeconomic parameters.
Keywords
Residual Heat Recovery, Internal combustion engine, Lithium Bromide and Water Absorption Chillers, Superstructure modeling and optimization
