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An improved POD technique for the optimization of MSF processes

Yıl 2012, Cilt: 15 Sayı: 4, 231 - 238, 16.03.2012

Öz

This paper discusses a general procedure leading to the process optimization of Multiple Flashing Desalination processes (MSF). The optimal configuration is attained via a novel inverse-design approach that uses the global exergy efficiency as objective function.

A fundamental methodological novelty of the proposed procedure is that it does not require the generation of a complete simulated set of results at each iteration step of the optimisation, because the objective function is computed by a functional extrapolation based on the Proper Orthogonal Decomposition (POD) method. With this method, the (often excessively taxing) computational cost for repeated numerical process simulations of incrementally different configurations is substantially reduced by replacing much of it by easy-to-perform matrix operations: a certain (small) number of initial process simulations is used only to calculate the basis of the POD interpolation and to validate (i.e., extend) the results.

As the accuracy of a POD expansion critically depends on the allowable number of initial simulations (the “snapshots”), the computational intensity of our methodology is certainly not negligible: but, as successfully demonstrated in the paper for a strongly simplified but realistic MSF process design problem, the idea that, given a certain number of necessary initial process simulations, additional full simulations are performed only in the “right direction” indicated by the gradient of the objective function in the solution space, leads to a successful strategy at a substantially reduced number of simulations. This “economy” with respect to other classical “optimization” methods is basically due to the capability of the POD procedure to identify the most important “modes” in the functional expansion of the vector basis consisting of a subset of the design parameters used in the evaluation of the objective function.

Yıl 2012, Cilt: 15 Sayı: 4, 231 - 238, 16.03.2012

Öz

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Ayrıntılar

Birincil Dil İngilizce
Bölüm Invited Paper for Special Issue in Honor of Yehia El-Sayed
Yazarlar

Roberto Melli

E. Sciubba

C. Toro Bu kişi benim

A. Zoli-porroni Bu kişi benim

Yayımlanma Tarihi 16 Mart 2012
Yayımlandığı Sayı Yıl 2012 Cilt: 15 Sayı: 4

Kaynak Göster

APA Melli, R., Sciubba, E., Toro, C., Zoli-porroni, A. (2012). An improved POD technique for the optimization of MSF processes. International Journal of Thermodynamics, 15(4), 231-238.
AMA Melli R, Sciubba E, Toro C, Zoli-porroni A. An improved POD technique for the optimization of MSF processes. International Journal of Thermodynamics. Kasım 2012;15(4):231-238.
Chicago Melli, Roberto, E. Sciubba, C. Toro, ve A. Zoli-porroni. “An Improved POD Technique for the Optimization of MSF Processes”. International Journal of Thermodynamics 15, sy. 4 (Kasım 2012): 231-38.
EndNote Melli R, Sciubba E, Toro C, Zoli-porroni A (01 Kasım 2012) An improved POD technique for the optimization of MSF processes. International Journal of Thermodynamics 15 4 231–238.
IEEE R. Melli, E. Sciubba, C. Toro, ve A. Zoli-porroni, “An improved POD technique for the optimization of MSF processes”, International Journal of Thermodynamics, c. 15, sy. 4, ss. 231–238, 2012.
ISNAD Melli, Roberto vd. “An Improved POD Technique for the Optimization of MSF Processes”. International Journal of Thermodynamics 15/4 (Kasım 2012), 231-238.
JAMA Melli R, Sciubba E, Toro C, Zoli-porroni A. An improved POD technique for the optimization of MSF processes. International Journal of Thermodynamics. 2012;15:231–238.
MLA Melli, Roberto vd. “An Improved POD Technique for the Optimization of MSF Processes”. International Journal of Thermodynamics, c. 15, sy. 4, 2012, ss. 231-8.
Vancouver Melli R, Sciubba E, Toro C, Zoli-porroni A. An improved POD technique for the optimization of MSF processes. International Journal of Thermodynamics. 2012;15(4):231-8.