Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
DEVELOPMENT OF HEAT AND MASS TRANSFER MODELLING FOR COUNTER-FLOW COOLING TOWER
Submission Author:
Andre Chun , ES , Brazil
Co-Authors:
Andre Chun, Bruno Muniz de Freitas Miotto, Vitor Buson de Paula, Diogo Alencar Zimerer, André Lucas Pereira, Carla César Martins Cunha, João L M Donatelli, José Joaquim Conceição Soares Santos
Presenter: Andre Chun
doi://10.26678/ABCM.COBEM2021.COB2021-1714
Abstract
The present work aims to model and design a counter-flow cooling tower equipment. The cooling tower is designed to meet the thermal load of a single-effect absorption chiller for a thermal power plant. The methodology is based on a discretization method that divides linearly the cooling tower in several increments. The software Engineering Equation Solver is used to develop the heat and mass transfer modelling, therefore, allowing to predict the thermodynamic states of the air stream and cooling water across the cooling tower. The humidity ratio, dry-bulb and wet-bulb temperatures, make-up water, heat and mass transfer rates, tower characteristic and other thermodynamic parameters are analyzed for each increment. The results show how different input data can influence not only the sizing of the cooling tower but also the heat and mass transfer across this equipment. For the experimental thermal system under a range and approach of 5.6 and 4\textdegree C, respectively, the cooling tower will transfer heat rate around 1968 kW, presenting a make-up water of 2614 kg/h and tower characteristic of 0.959. The results from this work will enlighten how to physically model and simulate properly the cooling tower rather than treat it as black box modelling.
Keywords
cooling tower, Discretization Approach, Heat and mass transfer, Engineering Equation Solver
