scholarly journals Global minimization of total exergy loss of multicomponent distillation configurations

AIChE Journal ◽  
2019 ◽  
Vol 65 (11) ◽  
Author(s):  
Zheyu Jiang ◽  
Zewei Chen ◽  
Joshua Huff ◽  
Anirudh A. Shenvi ◽  
Mohit Tawarmalani ◽  
...  
Keyword(s):  
Exergy Loss ◽  
Global Minimization ◽  
Multicomponent Distillation

scholarly journals Global optimization of multicomponent distillation configurations: 2. Enumeration based global minimization algorithm

AIChE Journal ◽  
2016 ◽  
Vol 62 (6) ◽  
pp. 2071-2086 ◽  
Author(s):  
Ulaganathan Nallasivam ◽  
Vishesh H. Shah ◽  
Anirudh A. Shenvi ◽  
Joshua Huff ◽  
Mohit Tawarmalani ◽  
...  
Keyword(s):  
Global Optimization ◽  
Global Minimization ◽  
Minimization Algorithm ◽  
Multicomponent Distillation

scholarly journals Global optimization of multicomponent distillation configurations: Global minimization of total cost for multicomponent mixture separations

2019 ◽  
Vol 126 ◽  
pp. 249-262 ◽  
Author(s):  
Zheyu Jiang ◽  
Tony Joseph Mathew ◽  
Haibo Zhang ◽  
Joshua Huff ◽  
Ulaganathan Nallasivam ◽  
...  
Keyword(s):  
Global Optimization ◽  
Multicomponent Mixture ◽  
Global Minimization ◽  
Total Cost ◽  
Multicomponent Distillation

Filling Function Method for Unconstrained Global Minimization

2002 ◽  
Vol 2 (2) ◽  
pp. 52-58
Author(s):  
Yue Zhongqi
Keyword(s):  
Function Method ◽  
Global Minimization

A Global Minimization Method for Image Segmentation

2014 ◽  
Vol 35 (4) ◽  
pp. 791-796
Author(s):  
Wei-bin Li ◽  
Er Gao ◽  
Song-he Song
Keyword(s):  
Image Segmentation ◽  
Global Minimization ◽  
Minimization Method

scholarly journals Exergy analysis of conventional and hydrothermal liquefaction–esterification processes of microalgae for biodiesel production

2020 ◽  
Vol 18 (1) ◽  
pp. 874-881
Author(s):  
Laras Prasakti ◽  
Sangga Hadi Pratama ◽  
Ardian Fauzi ◽  
Yano Surya Pradana ◽  
Arief Budiman ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Exergy Analysis ◽  
Lipid Extraction ◽  
Hydrothermal Liquefaction ◽  
Raw Material ◽  
Biodiesel Production ◽  
Exergy Loss ◽  
Thermochemical Conversion ◽  
Third Generation ◽  
Land Utilization

AbstractAs fossil fuels were depleting at an alarming rate, the development of renewable energy has become necessary. One of the promising renewable energy to be used is biodiesel. The interest in using third-generation feedstock, which is microalgae, is rapidly growing. The use of third-generation biodiesel feedstock will be more beneficial as it does not compete with food crop use and land utilization. The advantageous characteristic which sets microalgae apart from other biomass sources is that microalgae have high biomass yield. Conventionally, microalgae biodiesel is produced by lipid extraction followed by transesterification. In this study, combination process between hydrothermal liquefaction (HTL) and esterification is explored. The HTL process is one of the biomass thermochemical conversion methods to produce liquid fuel. In this study, the HTL process will be coupled with esterification, which takes fatty acid from HTL as raw material for producing biodiesel. Both the processes will be studied by simulating with Aspen Plus and thermodynamic analysis in terms of energy and exergy. Based on the simulation process, it was reported that both processes demand similar energy consumption. However, exergy analysis shows that total exergy loss of conventional exergy loss is greater than the HTL-esterification process.

Exergy loss characteristics of DME/air and ethanol/air mixtures with temperature and concentration fluctuations under HCCI/SCCI conditions: A DNS study

2021 ◽  
Vol 226 ◽  
pp. 334-346
Author(s):  
Jiabo Zhang ◽  
Minh Bau Luong ◽  
Francisco E. Hernández Pérez ◽  
Dong Han ◽  
Hong G. Im ◽  
...  
Keyword(s):  
Concentration Fluctuations ◽  
Exergy Loss

The Energy-Saving Optimization of the Organic Heat Transfer Material Heater

2012 ◽  
Vol 455-456 ◽  
pp. 284-288
Author(s):  
Wei Li Gu ◽  
Jian Xiang Liu
Keyword(s):  
Heat Transfer ◽  
Energy Saving ◽  
Flue Gas ◽  
Theoretical Basis ◽  
Operation Management ◽  
Exergy Loss ◽  
Irreversible Processes ◽  
Design Parameters ◽  
Gas Temperature

this paper studies the typical irreversible processes such as combustion and heat transfer with temperature difference based on the theory of thermodynamics, analyzes the influencing factors on exergy loss in irreversible processes, on the basis of this analysis, proposes the energy-saving optimization measures on design and operation management of the organic heat transfer material heater, and specially points out that in the design process, objective function can be constructed with the exergy loss as evaluation index to determine the outlet flue gas temperature of furnace and the flue gas temperature, and provides theoretical basis for the determination of design parameters.

Effect of supplementary firing on the performance of an integrated gasification combined cycle power plant

2000 ◽  
Vol 214 (1) ◽  
pp. 53-60 ◽  
Author(s):  
S De ◽  
P K Nag
Keyword(s):  
Power Plant ◽  
Heat Recovery ◽  
Combined Cycle ◽  
Exergy Loss ◽  
Temperature Ratio ◽  
Integrated Gasification Combined Cycle ◽  
Specific Heats ◽  
Second Law Analysis ◽  
Integrated Gasification ◽  
Igcc Power Plant

The effect of supplementary firing on the performance of an integrated gasification combined cycle (IGCC) power plant is studied. The results are presented with respect to a simple ‘unfired’ IGCC power plant with single pressure power generation for both the gas and the steam cycles as reference. The gases are assumed as real with variable specific heats. It is found that the most favourable benefit of supplementary firing can be obtained for a low temperature ratio R T only. For higher R T, only a gain in work output is possible with a reverse effect on the overall efficiency of the plant. The second law analysis reveals that the exergy loss in the heat-recovery steam generator is most significant as the amount of supplementary firing increases. It is also noteworthy that, although the total exergy loss of the plant decreases with higher supplementary firing for a low R T (= 3.0), the reverse is the case for a higher R T (= 6.0).

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