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主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering

ISSN 在线: 2379-1748

ISBN 打印: 978-1-56700-517-2 (Flash drive)

5-6th Thermal and Fluids Engineering Conference (TFEC)
May, 26–28, 2021 , Virtual

SMART ATOMIZATION: IMPLEMENTATION OF PID CONTROL IN BIOSLUDGE ATOMIZER

Get access pages 1149-1158
DOI: 10.1615/TFEC2021.mph.036753

摘要

We introduce a novel implementation of a proportional integral derivative (PID) control algorithm in CFD simulations for a biosludge atomizer to accommodate dynamically changing fluid properties. Direct spray injection of a highly concentrated non-Newtonian biosludge into a steam boiler is sought as a method to efficiently convert human waste to usable energy. We model biosludge atomization using a twin-fluid atomizer design with steam as the assisting gas. Difficulties arise because the viscosity of biosludge varies widely; if viscosity levels are too high, an undesirable pressure drop restricts the flow, and atomization quality suffers. To improve the robustness of the atomization process, two PID controllers were added. The first automates the flow of biosludge based on pressure drop across the atomizer. The second compensates for phase momentum ratio and controls the flow of steam based on droplet size. We demonstrate the efficacy of this coupled controller system by maintaining efficient atomization with a simulated 100-fold increase in biosludge viscosity.
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