Water and Wastewater Industry and Energy Management

Document Type: Research Paper

Author

Chemical Engineering department, university of Isfahan, Isfahan, Iran

Abstract

In this paper, simultaneous management of energy and water systems in single contaminant state was considered in two different conditions: (i) systems with only fresh water usage and (ii) systems with maximum reuse of water. In first mode, situations of individual stream, isothermal stream and non-isothermal stream mixing were investigated. Graphical and conceptual techniques for minimizing the targets have been used. As a case study, the water minimization along with energy-efficient in gas refinery was considered. Fresh water consumption of the refinery is 34 kg/s. Using non-isothermal mixing, number of streams and heat exchangers were decreased, but energy targets were increased. Fresh water consumption of final water network was reduced to 21 kg/s because the Cooling tower as a major water-using operation unit didn’t use fresh water anymore and a single contaminant approach was considered too. The new water network has 1399.2 kW hot utility duty and 962.2 kW cold utility duty. 

Keywords


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