Modelling of an ethanol-water distillation column assisted by an external heat pump

2002 ◽  
Vol 26 (12) ◽  
pp. 1055-1072 ◽  
Author(s):  
S. B. M. Oliveira ◽  
J. A. R. Parise ◽  
R. Pitanga Marques
Keyword(s):  
Heat Pump ◽  
Distillation Column ◽  
External Heat ◽  
Water Distillation

Parametric study of an ethanol–water distillation column with direct vapour recompression heat pump

2009 ◽  
Vol 13 (2) ◽  
pp. 96-105 ◽  
Author(s):  
Christopher Enweremadu ◽  
Adekojo Waheed ◽  
Jeremiah Ojediran
Keyword(s):  
Heat Pump ◽  
Parametric Study ◽  
Distillation Column ◽  
Water Distillation

scholarly journals USING EXERGY LOSS PROFILES AND ENTHALPY-TEMPERATURE PROFILES FOR THE EVALUATION OF THERMODYNAMIC EFFICIENCY IN DISTILLATION COLUMNS

2005 ◽  
Vol 4 (1) ◽  
pp. 76 ◽  
Author(s):  
S. H. B. Faria ◽  
R. J. Zemp
Keyword(s):  
Energy Balance ◽  
Distillation Column ◽  
Enthalpy Of Solution ◽  
Exergy Loss ◽  
Thermodynamic Efficiency ◽  
Consistency Test ◽  
Distillation Columns ◽  
Water Distillation ◽  
Ideal Solutions ◽  
Thermodynamic Excess

In this work the temperature-enthalpy profile and the exergy loss profile are used together to improve thermodynamic efficiency of distillation columns, by identifying possible benefits of using side exchangers. The method proposed is to compute the exergy loss profile and to analyse the distribution of the losses across the column stages. The present work aims at applying the stage-by-stage exergy analysis to the distillation of non-ideal mixtures, e.g. methanol/water. For these systems the use of thermodynamic excess properties is required: Gibbs free energy for phase equilibrium and enthalpy of solution for energy balance. Initial studies showed that the enthalpy of solution has a small effect on the overall energy balance of the distillation column, but a significant impact on the exergy loss profiles. Some profiles even showed a violation of the second law of thermodynamics, with entropy being destroyed on some stages, clearly indicating that a wrong approach to exergy calculation was being used.A model for exergy calculations of non-ideal solutions is presented. The exergy values so computed are then checked by a consistency test, using the reversible column profile. Finally, the exergy procedures are used to study a typical methanol/water distillation columns, where the exergy profiles are used to identify scope for intermediate heat exchange.

scholarly journals Separative Analyses of Packed Water Distillation Column with Channeling Stage Model

2000 ◽  
Vol 37 (3) ◽  
pp. 273-280 ◽  
Author(s):  
Takahiko SUGIYAMA ◽  
Youichi ENOKIDA ◽  
Ichiro YAMAMOTO
Keyword(s):  
Distillation Column ◽  
Stage Model ◽  
Water Distillation

scholarly journals Adaptive Dual Composition Control of a Binary Distillation Column with a Heat Pump

1988 ◽  
Vol 21 (7) ◽  
pp. 193-198 ◽  
Author(s):  
C.S. Nielsen ◽  
H.W. Andersen ◽  
H. Brabrand ◽  
S.B. Jørgensen
Keyword(s):  
Heat Pump ◽  
Distillation Column ◽  
Composition Control

Energy-Saving Characteristics of Benzene-Toluene Mixtures in Heat Pump Distillation Column

2012 ◽  
Vol 455-456 ◽  
pp. 630-634
Author(s):  
Zheng Ming Tong ◽  
Chao Li ◽  
Jia Lei Lu ◽  
Kai Zhu
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Distillation Column ◽  
Energy Savings ◽  
Operating Conditions ◽  
Material System ◽  
Industrial Energy ◽  
Energy Consuming ◽  
Benzene Toluene ◽  
Consuming Country

China is a big industrial energy consuming country. The largest proportion of energy consuming is the operations of separation in chemical industry, and the energy consumption of the distillation is the highest in separation. Therefore, it is very important to research energy-saving issues of the process of distillation in today's circumstances of the energy shortage. This article describes the model of heat pump distillation column,and its characteristics, uses static simulation programs to simulate operating conditions in the atmospheric pressure for the benzene-toluene material system, and studys effects of the different feed states on the energy-saving of heat pump distillation column. The results will be compared with the conventional distillation column, and it was showed that for benzene-toluene system, the heat pump distillation column is more remarkable than the conventional distillation column in energy savings, and its energy saving rate can reach 46%.

Stirling Heat Pump External Heat Systems: An Appliance Perspective

1992 ◽  
Author(s):  
Andrew D. Vasilakis ◽  
John F. Thomas
Keyword(s):  
Heat Pump ◽  
External Heat
Sign in / Sign up

Export Citation Format

Share Document