Optimization of a distillation column with a direct vapor recompression heat pump

1985 ◽  
Vol 24 (1) ◽  
pp. 128-132 ◽  
Author(s):  
Josep A. Ferre ◽  
Francesc Castells ◽  
Joaquin Flores
Keyword(s):  
Heat Pump ◽  
Distillation Column ◽  
Vapor Recompression

Intensifying Kaibel dividing-wall column via vapor recompression heat pump

2019 ◽  
Vol 142 ◽  
pp. 195-203 ◽  
Author(s):  
Xing Qian ◽  
Kejin Huang ◽  
Haisheng Chen ◽  
Yang Yuan ◽  
Liang Zhang ◽  
...  
Keyword(s):  
Heat Pump ◽  
Dividing Wall Column ◽  
Vapor Recompression

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%.

Reducing Energy Consumption in Propylene-Propane Separation with Heat Coupled Distillation

2011 ◽  
Vol 225-226 ◽  
pp. 500-503
Author(s):  
Lan Yi Sun ◽  
Jun Li ◽  
Xue Nuan Liu ◽  
Qing Song Li
Keyword(s):  
Energy Consumption ◽  
Distillation Column ◽  
Pressure Ratio ◽  
Internal Heat ◽  
Thermodynamic Efficiency ◽  
Total Annual Cost ◽  
Heat Integration ◽  
Internal Heat Integration ◽  
Vapor Recompression ◽  
Reducing Energy

The heat coupled distillation column which applies the principle of internal heat integration between the rectifying section and the stripping section of a distillation column by increasing the temperature of the rectifying section with a compressor attracts extensive attention worldwide for its high thermodynamic efficiency. In this study, the economic features of a heat coupled distillation column (HCDC) are investigated and compared to a conventional column and a commercial column with vapor recompression system (VRC) for the separation of propylene-propane mixture. The economic analysis indicates that HCDC has 10 – 20 % total annual cost (TAC) saving associated with VRC, which appeared to be strongly sensitive to the pressure ratio.

scholarly journals Multi-Objective Assessment of Heat Pump-Assisted Ethyl Acetate Production

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1380
Author(s):  
Branislav Šulgan ◽  
Juraj Labovský ◽  
Miroslav Variny ◽  
Zuzana Labovská
Keyword(s):  
Ethyl Acetate ◽  
Heat Pump ◽  
Distillation Column ◽  
Reactive Distillation ◽  
Process Models ◽  
Final Decision ◽  
Acetate Production ◽  
Separation Unit ◽  
Multi Objective ◽  
Conventional Process

Multi-objective (energy–economic–safety) assessment of ethyl acetate production involving a heat pump is presented in this paper. The heat pump is designed to intensify ethyl acetate separation and to reduce the total operating cost. Two ethyl acetate production pathways are upgraded using a heat pump, conventional process and reactive distillation column with a separation unit. Detailed process models including the heat pump environment have been compiled and optimized in the Aspen Plus software. Both benefits and drawbacks of including the heat pump in the processes are evaluated using three different points of view: process energy, economics, and safety. As a result, using a heat pump is highly recommended in both conventional process and reactive distillation column with a separation unit. As a higher level of process integration is achieved using a heat pump, economic aspects are improved; however, safety aspects deteriorate. The final decision on the suitability of using a heat pump depends on whether it is proposed for an existing plant, or a completely new plant is designed. In a new plant, the concept of a thermally coupled process (reactive distillation column with a stripper column) has been proven to be the most promising.

Comparison of mechanical vapor recompression technology for solution regeneration in heat-source tower heat pumps

2018 ◽  
Vol 40 (3) ◽  
pp. 360-378
Author(s):  
Songhui Ai ◽  
Baolong Wang ◽  
Xianting Li ◽  
Wenxing Shi
Keyword(s):  
Heat Source ◽  
Heat Pump ◽  
Coefficient Of Performance ◽  
Normal Operation ◽  
Regeneration System ◽  
Pump System ◽  
Heat Pump System ◽  
Single Effect ◽  
Vapor Recompression ◽  
Regeneration Systems

Solution regeneration of the heat-source tower is significant to guarantee the normal operation of the heat-source tower. Mechanical vapor recompression system is an efficient system for evaporation of solution. In this paper, mechanical vapor recompression system is applied to regenerate solution of heat-source tower. To clarify the merits of mechanical vapor recompression solution regeneration system, several typical solution regeneration systems are modelled. As a result, mechanical vapor recompression shows 35.7%, 73.5% and 91.2% energy saving compared to air-driven heat pump, three-effect evaporating system, and single effect evaporating system, respectively. Furthermore, a heat-source tower heat pump with solution generation system is installed in a typical building in Yangtze river region. The whole heating season performance is simulated to find the effects of different solution regeneration system on the whole heat pump system. As a conclusion, the seasonal coefficient of performance of heat pump is decreased 1.6% by mechanical vapor recompression regeneration system. Comparatively, the seasonal coefficient of performance of heat pump is decreased 2.6%, 4.2% and 10.0% by air-driven heat pump, three-effect evaporating system, and single effect evaporating system, respectively. Practical application: Solution regeneration systems for heat-source tower heat pump systems have been applied in building projects especially in hot summer and cold winter zone in China based on previous investigation. A heat-source tower heat pump system combined with heat pump solution regeneration system has been applied in an office building in Changsha, Hunan Province in China. And its practical operation energy consumption has been reduced obviously compared with traditional single effect evaporation system. Therefore, it is of vital importance to demonstrate the operating performance of different solution regeneration systems applied in heat-source tower heat pump systems in building.

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