Optimum Integration of Regeneration in Heat-Integrated Water Networks Through a Hybrid Approach

Heat-integrated water networks facilitate the conservation of energy and water collectively. Heat exchanger units are used to recover thermal energy, and regeneration units are utilized in process industries to improve water utilization. A hybrid algorithm is developed in this paper to optimize wate...

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Bibliographic Details
Published in:Process integration and optimization for sustainability 2021-12, Vol.5 (4), p.707-727
Main Authors: Kamat, Shweta, Bandyopadhyay, Santanu
Format: Article
Language:English
Subjects:
Algebra
Algorithms
Contaminants
Economics and Management
Energy conservation
Energy consumption
Energy Policy
Energy requirements
Engineering
Heat
Heat exchangers
Heat recovery systems
Heuristic
Industrial and Production Engineering
Industrial Chemistry/Chemical Engineering
Linear programming
Mathematical programming
Networks
Nonlinear programming
Optimization
Original Research Paper
Regeneration
Sustainable Development
Temperature
Thermal energy
Waste Management/Waste Technology
Water conservation
Water consumption
Water reuse
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Summary:Heat-integrated water networks facilitate the conservation of energy and water collectively. Heat exchanger units are used to recover thermal energy, and regeneration units are utilized in process industries to improve water utilization. A hybrid algorithm is developed in this paper to optimize water consumption and the throughput of the regeneration unit by minimizing the total annualized costs. In this algorithm, the interactions between water and regeneration and their effect on energy consumption are established through a non-linear programming model, and the heat exchanger requirements for overall thermal integration are targeted through pinch analysis. The notions of pinch analysis are employed in the proposed algorithm to develop heuristics to reduce the energy requirements by enforcing non-isothermal mixing of water streams. The energy and water targeting approach presented in this paper combines the capability of mathematical programming of handling multiple contaminants with the proficiency of pinch analysis to impart physical insights. Two demonstrative examples are solved to establish the significance of the proposed algorithm. In most instances, heat-integrated water networks with lower costs are achieved through this hybrid algorithm compared to literature. It is identified that the installation of regeneration units may reduce the total annualized costs depending on the specific example.
ISSN:2509-4238
2509-4246
DOI:10.1007/s41660-021-00184-5