Multiobjective optimization of the design of two-stage flash evaporators: Part 1. Process modeling

Tiat, Vanessa Ho Kon; Sébastian, Patrick; Quirante, Thomas

doi:10.1016/j.ijthermalsci.2010.06.018

Cited by 10 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Post-fermentation maceration plays a particularly important role in the pigment polymerization process and consequent color stabilization [ 184 ]. Special techniques such as thermovinification, flash heating and vacuum cooling of the crushed grapes, and carbonic maceration display different monomeric, copigmented and polymeric anthocyanin profiles, some of the differences being attributable to differences in proanthocyanidin extraction during the different processes [ 168 , 181 , 182 , 183 , 184 ].…”

Section: Influence Of Enology Practices On Anthocyanins In Winesmentioning

confidence: 99%

“…The addition of pectolytic enzymes during maceration may also facilitate the extraction of anthocyanins into red wines, with a consequent increase the color intensity, although there are varying reports about the effectiveness of specific color extracting enzymes [ 5 , 147 , 148 , 160 , 177 , 178 , 179 , 180 , 181 , 182 , 183 , 184 , 185 , 186 , 187 , 188 , 189 , 190 ]. Pectolytic enzymes now are widely used in enology to improve juice yield and clarification by breaking down the pectins of the cell walls of the berries.…”

Section: Influence Of Enology Practices On Anthocyanins In Winesmentioning

confidence: 99%

See 1 more Smart Citation

Anthocyanins and Their Variation in Red Wines I. Monomeric Anthocyanins and Their Color Expression

et al. 2012

View full text Add to dashboard Cite

Originating in the grapes, monomeric anthocyanins in young red wines contribute the majority of color and the supposed beneficial health effects related to their consumption, and as such they are recognized as one of the most important groups of phenolic metabolites in red wines. In recent years, our increasing knowledge of the chemical complexity of the monomeric anthocyanins, their stability, together with the phenomena such as self-association and copigmentation that can stabilize and enhance their color has helped to explain their color representation in red wine making and aging. A series of new enological practices were developed to improve the anthocyanin extraction, as well as their color expression and maintenance. This paper summarizes the most recent advances in the studies of the monomeric anthocyanins in red wines, emphasizing their origin, occurrence, color enhancing effects, their degradation and the effect of various enological practices on them.

show abstract

Section: Influence Of Enology Practices On Anthocyanins In Winesmentioning

confidence: 99%

Section: Influence Of Enology Practices On Anthocyanins In Winesmentioning

confidence: 99%

Anthocyanins and Their Variation in Red Wines I. Monomeric Anthocyanins and Their Color Expression

et al. 2012

View full text Add to dashboard Cite

show abstract

“…The general context of the methodology developed in this article is introduced in [11,12]. In this paper we propose a global procedure to support decision in the early phases of design processes, and more precisely in embodiment design.…”

Section: Developed Methodologymentioning

confidence: 99%

Multiobjective optimization including design robustness objectives for the embodiment design of a two-stage flash evaporator

Quirante

Ledoux

Sébastian

2011

Int J Interact Des Manuf

Self Cite

View full text Add to dashboard Cite

During the early phases of design processes, designers have to take the best decisions in order to converge quickly toward the most preferred design solution. More precisely, in a preliminary design context, the phase of embodiment design consists in determining the best values for the main dimensioning parameters of the system to improve its performances. In general, these performances must satisfy functional or technical requirements related to design objectives. The balancing act between the satisfaction of constraints and objectives can be treat as a multiobjective optimization problem. Although designers often face to a qualitative evaluation of design solutions, difficulty arises from his ability to express preferences and expectations throughout the objective function of the multiobjective optimization problem. Illustrated through the preliminary design of a two stage flash evaporator, the purpose of this article aims to develop a methodology to formulate both constraints and preferences into the optimization model. Thus design solutions are evaluated with a single global indicator of confidence. Flash evaporators are thermal systems which are mainly used for flash cooling and juice concentration applications. The design of such a system has to respect specific constraints related to these areas of applications and should meet multiple design objectives. Several goal-oriented design solutions are discussed, in particular when low design sensitivity is expected.

show abstract

“…The transfers, dimensional, environmental and economical models contributing to the design model of the flash evaporation process are not detailed in this paper, but the reader could refer to [15][16][17] for further explanations.…”

Section: Principlesmentioning

confidence: 99%

“…In a recent study, the formulation of the model was proposed by [17]. In [18], we tackled the preliminary design of this flash evaporator by trading-off multiple conflicting design objectives of performance such as transportability, environmental impact, operative cost, product quality and cooling power.…”

Section: Introductionmentioning

confidence: 99%

Robust design of flash evaporators for must concentration applications in wine production

Quirante

Ledoux

Sébastian

2018

Mechanics & Industry

View full text Add to dashboard Cite

In recent years, flash evaporation processes have received an increased attention in the wine industry for must concentration applications. Specific constraints related to the wine industry area had lead to many improvements of flash evaporators initially designed for seawater desalination. In particular the quality of the vintage, the transportability of the system and the environmental impact are of main interest. Moreover, the preliminary design of such systems must also consider robustness criteria. Obviously, variations of temperatures and flow rates of liquids at the inlet of the process can dramatically impact the quality of the product at the system outlet. In particular, deviations from the target values of temperature and alcoholic volume fraction can lead to a severe degradation of the vintage. As it is common in product design to have multiple performance measures, the robust design problem is addressed using a multi-objective approach. A trade-offs is introduced between two main design objectives: (i) the improvement in overall performance (product quality, transportability, environmental impact and costs) and (ii) the lowering of the sensitivity of the product quality under uncertainty. These main objectives are related to several elementary objectives corresponding to design criteria and a preference aggregation method is used to formulate the two different design objectives. Objectives are linked to weighting parameters values equivalent to priority levels. The selection of the most preferred design solution is discussed according to different trade-off strategies. The generation of the Pareto set is addressed by the non dominated sorting genetic algorithm NGSAII. From computing results, our recommendations concern the compromise between performance and robustness of flash evaporators. In this context, the final alcoholic volume fraction of the wine is the most sensitive parameter, which justify to maintain a high value of evaporative capacity when designing this type of system.

show abstract

Multiobjective optimization of the design of two-stage flash evaporators: Part 1. Process modeling

Cited by 10 publications

References 21 publications

Anthocyanins and Their Variation in Red Wines I. Monomeric Anthocyanins and Their Color Expression

Anthocyanins and Their Variation in Red Wines I. Monomeric Anthocyanins and Their Color Expression

Multiobjective optimization including design robustness objectives for the embodiment design of a two-stage flash evaporator

Robust design of flash evaporators for must concentration applications in wine production

Contact Info

Product

Resources

About