Optimization of a Diabatic Distillation Column with Sequential Heat Exchangers

2004 ◽  
Vol 43 (23) ◽  
pp. 7566-7571 ◽  
Author(s):  
Edward Steven Jimenez ◽  
Peter Salamon ◽  
Ricardo Rivero ◽  
Consuelo Rendon ◽  
Karl Heinz Hoffmann ◽  
...  
Keyword(s):  
Heat Exchangers ◽  
Distillation Column ◽  
Diabatic Distillation

Energy-Efficient Diabatic Distillation Using a Horizontal Distillation Column

2013 ◽  
Vol 52 (42) ◽  
pp. 14927-14935 ◽  
Author(s):  
Byoung Chul Kim ◽  
Ho Hwan Chun ◽  
Young Han Kim
Keyword(s):  
Energy Efficient ◽  
Distillation Column ◽  
Diabatic Distillation

Entropy production and economic analysis in diabatic distillation columns with heat exchangers in series

Energy ◽  
2015 ◽  
Vol 93 ◽  
pp. 1719-1730 ◽  
Author(s):  
J.Rafael Alcántara-Avila ◽  
Ken-Ichiro Sotowa ◽  
Toshihide Horikawa
Keyword(s):  
Economic Analysis ◽  
Entropy Production ◽  
Heat Exchangers ◽  
Distillation Columns ◽  
In Series ◽  
Diabatic Distillation

scholarly journals A new approach to entropy production minimization in diabatic distillation column with trays

2010 ◽  
Vol 14 (2) ◽  
pp. 317-328 ◽  
Author(s):  
Momcilo Spasojevic ◽  
Milovan Jankovic ◽  
Damir Djakovic
Keyword(s):  
Entropy Production ◽  
Distillation Column ◽  
Direct Methods ◽  
Iterative Solution ◽  
Theoretical Models ◽  
Optimization Method ◽  
Control Variables ◽  
Heat Quantity ◽  
Diabatic Distillation ◽  
Model Linearization

Previous approach to direct numerical minimization of entropy production in diabatic distillation column in order to determine heat quantity to be exchanged at trays was based on temperatures on trays as control variables and it was applied only to simple binary columns. Also, previously developed theoretical models for determining optimal exchanged heat profile were determined only at such columns and while they were approximated they produced worse results than numerical minimum of entropy production. In this paper, as control variables for minimization, exchanged heat on the trays is used. It enables application to complex multicomponent diabatic columns. Ishii-Otto global method, based on model linearization and iterative solution by Newton-Raphson technique, is applied for solving column mathematical model. Needed thermodynamical properties for ideal systems are calculated using Lewis-Randall ideal solution model, and for non-ideal slightly polar systems they are calculated using Soave equation of state. Five direct methods are used for numerical optimization. Applied approach is successfully demonstrated at frequently used example of distillation of benzene and toluol mixture by using for these purposes specially written program. Simplex method appeared to be the most convenient optimization method for the considered problem.

scholarly journals Pinch Analysis Applied to Atmospheric Distillation Column

2020 ◽  
Vol 1 (1) ◽  
pp. 11-15
Author(s):  
Diana S. Fumuassuca ◽  
Marcilio Dos Santos ◽  
Antonio A. Chivanga Barros
Keyword(s):  
Energy Consumption ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Distillation Column ◽  
Level Energy ◽  
Flow Sheet ◽  
Pinch Analysis ◽  
Atmospheric Distillation ◽  
Reduction Of Energy Consumption ◽  
Energy Balances

To increase the efficiency of industrial processes, mainly in petroleum refineries, the strategies to energy optimization are being developed. Thus, there is a need to know the energy consumption analysis in term of loss level and to define the procedure to recovery that. The analyses involve the flow rate study, based on energy balances that define the best strategy to use the energy, with the installation of heat exchanger networks. With the use of this procedure, we can reduce the operational costs, associated with a reduction of the level energy consumption. The study developed here was related to refinery atmospheric distillation column, using pinch technology, based on energy conservation law. The pre-flash, atmospheric distillation column and heat exchangers networks were evaluated in this study. The dates used in this study were collected from Angolan refinery, during 30 days and the results were used to mass and energy balances. Previously, the flow sheet process and established the relations between the operational parameters in industrial equipment were evaluated. The results from energy balances were used to integration study, supported by the pinch analysis using spreadsheet software, and the dates showed as composite, great composite and cascade curves. For this, were used the heat exchanger battery based on pinch analysis, to make the new networks of energy integration. After the assessment of each network with 4 to 12 heat exchangers, it was optimized to know that one with better energy consumption. The new network proposed is evaluated in term of reduction of energy consumption, minor number of heat exchangers and networks optimization. As a result of this methodology, we can see the reduction of energy consumption of 785,4 KW (utility) and 1277,1 KW (cold), respectively. On other hand, the optimization strategy adopted here allowed increase the temperature to 301ºC.

Determination of creep mechanisms in various silicon carbides via TEM

1986 ◽  
Vol 44 ◽  
pp. 484-487
Author(s):  
C. H. Carter ◽  
J. E. Lane ◽  
J. Bentley ◽  
R. F. Davis
Keyword(s):  
Heat Exchangers ◽  
Sintered Material ◽  
Polycrystalline Material ◽  
Chemical Vapor ◽  
Graphite Substrate ◽  
Second Phase ◽  
Reaction Bonding ◽  
Creep Mechanisms ◽  
Porous Sic

Silicon carbide (SiC) is the generic name for a material which is produced and fabricated by a number of processing routes. One of the three SiC materials investigated at NCSU is Norton Company's NC-430, which is produced by reaction-bonding of Si vapor with a porous SiC host which also contains free C. The Si combines with the free C to form additional SiC and a second phase of free Si. Chemical vapor deposition (CVD) of CH3SiCI3 onto a graphite substrate was employed to produce the second SiC investigated. This process yielded a theoretically dense polycrystalline material with highly oriented grains. The third SiC was a pressureless sintered material (SOHIO Hexoloy) which contains B and excess C as sintering additives. These materials are candidates for applications such as components for gas turbine, adiabatic diesel and sterling engines, recouperators and heat exchangers.

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