Title: A generalised approach to the dynamic modelling of a water tube boiler

Authors: R.S. Jha; Mandar M. Lele

Addresses: Innovation, Heating, Thermax Limited, School of Mechanical Engineering, Dr. Vishwanath Karad, MIT-World Peace University, Pune, India ' School of Mechanical Engineering, Dr. Vishwanath Karad, MIT-World Peace University, Pune, India

Abstract: The present work aims to develop a generalised model to study the boiler dynamics in fluctuating load conditions. The model has been developed for a water tube boiler, but it can be extended to a hybrid boiler configuration as well. It generates a system of equations including mass and energy conservation equations for natural circulation circuits, drum below water level and drum above water level. It uses a transient momentum conservation equation for the natural circulation circuit and a smaller time step is used for convergence. This also presents the boiler dynamics with a feedback control system for load and water level management.

Keywords: circulation; riser; downcomer; drum; dryness fraction; steam volume fraction; condensation enthalpy; void fraction; rate of condensation; drift velocity.

DOI: 10.1504/IJESMS.2024.141979

International Journal of Engineering Systems Modelling and Simulation, 2024 Vol.15 No.6, pp.310 - 321

Accepted: 23 Jun 2023
Published online: 04 Oct 2024 *

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