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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14709
Title: Energy management in multi stage evaporator through a steady and dynamic state analysis
Authors: Verma O.P.
Manik G.
Mohammed T.H.
Published in: Korean Journal of Chemical Engineering
Abstract: Increasing energy demand, high cost of energy and global warming issues across the globe require energy-intensive industries, such as paper mills to improve energy efficiency. Multi-stage evaporators used to concentrate the black liquor in such mills form its most energy consuming unit and require a strong understanding of steady and unsteady state behavior to ensure energy savings. The modeling of nonlinear heptads’ effect system yielded a set of complex nonlinear algebraic and differential equations that are analyzed using Interior-point method and state space representation. Dynamic response of product concentration and system vapor temperatures along with system stability and controllability have been explored by disturbing the flow rate, concentration and temperature of feed, and fresh steam flow rate. Simulations predict that steam flow rate, feed flow rate and its concentration invariably are major controlling factors (in decreasing order) of vapor temperature and product concentration. The interactive behavior between different effects translates into slower responses of the effects with increasing separation from disturbance source. This steady state and transient study opens many new explanations to this relatively less explored area and helps to propose and implement industrial PID controllers to reduce steam consumption and control product quality. © 2017, Korean Institute of Chemical Engineers, Seoul, Korea.
Citation: Korean Journal of Chemical Engineering (2017), 34(10): 2570-2583
URI: https://doi.org/10.1007/s11814-017-0180-4
http://repository.iitr.ac.in/handle/123456789/14709
Issue Date: 2017
Publisher: Springer New York LLC
Keywords: Energy Efficiency
Evaporative Heat Transfer
Multi-stage Evaporator
Nonlinear Dynamic Model
PID Controller
State Space Representation
ISSN: 2561115
Author Scopus IDs: 56594677400
56595314900
57189036944
Author Affiliations: Verma, O.P., Department of Polymer and Process Engineering, Indian Institute of Technology, Roorkee, India
Manik, G., Department of Polymer and Process Engineering, Indian Institute of Technology, Roorkee, India
Mohammed, T.H., Department of Polymer and Process Engineering, Indian Institute of Technology, Roorkee, India
Corresponding Author: Manik, G.; Department of Polymer and Process Engineering, Indian Institute of TechnologyIndia; email: manikfpt@iitr.ac.in
Appears in Collections:Journal Publications [PE]

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