Optimal thermodynamic synthesis of dual-purpose desalination plants

✍ Scribed by P.A. Aguirre; Nicolás J. Scenna

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 1001 KB
• Volume: 44
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(89)85065-1

✦ Synopsis

A thermodynamic approach to the synthesis of a dual-purpose desalination system is developed. In a previous paper (Irazoqui, 1986, Chern. Engng Sci. 41,1243-1255), it was shown that a minimum for the system entropy generation corresponds, if adequate restrictions were imposed, to an optimum in the thermodynamics performance. In this paper a family of optimal thermodynamic but non-ideal solutions is found by "weighing" the impact of the size of the total heat exchange area on the optimal solution sought. The problem is then solved for each value of the weighing parameter. A non-ideality due to mechanical dissipation is introduced by means of the turbine isoentropic efficiency. Optimal structural and operation variables are obtained, which can be easily shown in a graph.