Studies on simultaneous energy and water minimisation—Part II: Systems with maximum re-use of water

• Published in: Chemical engineering science Vol. 60; no. 12; pp. 3291 - 3308
• Main Authors: Savulescu, Luciana, Kim, Jin-Kuk, Smith, Robin
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.06.2005; Elsevier
• Subjects: Applied sciences; Chemical engineering; Continental surface waters; Energy recovery; Exact sciences and technology; Heat exchangers and evaporators; Heat loss; Natural water pollution; Pollution; Separate system; Water loss; Water minimisation; Water treatment and pollution; Energy recovery; Heat loss; Separate system; Water loss; Water minimisation; Design; Mixing; Meshed network; Heat exchanger; Stream; Unit operation; Composite material
• ISSN: 0009-2509; 1873-4405
• DOI: 10.1016/j.ces.2004.12.036

A new systematic design methodology has been developed for the simultaneous management of energy and water systems that also feature maximum re-use of water. A two-dimensional grid diagram is proposed to exploit different options within water systems and also enable reduced complexity of the energy and water network. Isothermal and non-isothermal stream mixing between water streams are introduced to create separate systems between hot and cold water streams in the energy composite curves and provide a design basis for a better structure with fewer units for the heat exchanger network. In addition to allowing re-use of water, issues about heat losses inside unit operations have also been incorporated in the simultaneous management of water and energy.