Numerical Simulation of an Ethylene Re-Liquefaction Plant

Berlinck, E. C.; Parise, J. A. R.; Marques, R. Pitanga

doi:10.1002/(sici)1099-114x(19970610)21:7<597::aid-er193>3.0.co;2-5

Cited by 10 publications

(4 citation statements)

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“…A similar study with the same purpose and similar results was reported by Li et al [8]. Berlinck et al [9] presented a numerical simulation of the ethylene reliquefaction plant. A simulation model was developed using the basic concepts of thermodynamics, heat transfer, and the thermophysical properties of working fluids.…”

Section: Introductionsupporting

confidence: 73%

Analysis of Mixing Processes of LPG Gases in Tanks When Transporting by Sea

et al. 2022

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The present study is an analysis of the processes in the components of the LPG (propane/butane) reliquefaction plant under the conditions of co-mingling in tanks when transporting by sea. For the analysis, the monitoring data of an LPG cargo operation have been used. An energy analysis of the mixture-based reliquefaction plant has been performed. The characteristics of the mixture in the tanks, the operating conditions of the reliquefaction plant, and the performance of the system have been considered. The method of equivalence has been applied for thermodynamic analysis. The result of the substitution of actual processes with equivalent ones allows for the accomplishment of the parameters control of each working fluid within the mixture as a pure working fluid. It is shown that the low-boiling component determines the operating parameters of the entire reliquefaction plant. The method of equivalence and visualization of the processes within the LPG as a mixture using the thermodynamic diagrams of pure working fluids is recommended to shorten the path to set up the appropriate reliquefaction plant management strategy. The energy analysis performed using the method of equivalent cycles has been validated with the existing reliquefaction plant characteristics. The inaccuracies are in the limit of 4%.

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Section: Introductionsupporting

confidence: 73%

Analysis of Mixing Processes of LPG Gases in Tanks When Transporting by Sea

et al. 2022

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“…As shown in Figure (a), a widely applied CRP consisted of two cascaded sub‐systems, that is, a two‐stage upper cycle using propane as refrigerant and a two‐stage bottom cycle using ethylene as refrigerant . In this study, the CRP has been modified into an EERP by replacing the expansion valves (V2 and V4) with two‐phase ejectors (Ejector1 and Ejector2).…”

Section: Simulation Of the Ejector‐enhanced Ethylene Re‐liquefaction mentioning

confidence: 99%

“…The published literatures showed that a cascade re‐liquefying process consisting of two cascaded two‐stage compression refrigeration cycles has been regarded as a typical scheme for LEG vessels. Berlinck et al simulated a two‐stage cascade refrigeration system in which an ammonia cycle provides cooling capacity to the ethylene liquefaction cycle. Chien and Shih proposed an optimization design of BOG re‐liquefaction process for LEG vessels.…”

Section: Introductionmentioning

confidence: 99%

An ejector-enhanced re-liquefaction process (EERP) for liquid ethylene vessels

Tan

Sun

Zhao

et al. 2016

Int. J. Energy Res.

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Summary For liquid ethylene gas (LEG) vessels, developing high‐efficient re‐liquefaction plant to handle the continuously yielded boil‐off gas (BOG) could significantly improve its energy efficiency. In this study, an ejector enhanced re‐liquefaction process (EERP) for LEG vessels is proposed to improve the performance of the conventional re‐liquefaction process (CRP) with a cascaded two‐stage compression refrigeration cycle. In Aspen HYSYS, an ejector model was developed to analyse the performance of the proposed cycle system. The effects of the evaporating pressure of upper cycle pR0 ' and the intermediate pressures of upper and bottom cycles (pR3 and pE3) on the performances of both the CRP and EERP were studied. The results show that better performances can be reached with lower pR0 ' for the CRP and EERP. In order to achieve the best performances, the optimal pR3 and pE3 are, respectively, lifted to 510 kPa and 630 kPa by the EERP. When the proposed cycle system with the EERP is employed to re‐liquefy 3000 kg/h of ethylene BOG, its coefficient of performance (COP) and exergy efficiency can be improved by 2.95–5.31% and 2.70–4.86% over that of the cycle system with the CRP. Correspondingly, the EERP could reduce the total power consumption of 15.7–27.9 kW compared to the CRP. Copyright © 2016 John Wiley & Sons, Ltd.

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“…In particular, the technique has already been successfully employed for styrene (Sundaram et al 1991), wastewater treatment (Funamizu and Takakuwa 1994), alcohol fermentation (Pascal ef al. 1995), steam power generation (Ong'iro et al 1996), ethylene reliquefaction (Berlinck et al 1997), pervaporative aroma recovery (Karlsson et al 1998) and sour water treatment (Rachid and Caiio Andrade 2001) plants, as well as for a steam production process using atmospheric fluidized bed coal combustion (Douglas and Young 1991). In this work, the performance of a real milk evaporation unit was investigated by means of steady-state simulation. The ASPEN Plus shell (Evans ef al.…”

Section: Introductionmentioning

confidence: 99%

PERFORMANCE ANALYSIS of the MILK CONCENTRATING SYSTEM FROM A BRAZILIAN MILK POWDER PLANT

Ribeiro

Andrade

2003

J Food Process Engineering

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The steady‐state operation of the concentrating system from an industrial milk powder plant was studied using a simulation approach. This system is composed of two tubular preheaters, a plate pasteurizer, a thermocompressor and four climbing‐falling‐film plate evaporators operating in a multiple‐effect arrangement. Its simulation was performed using the ASPEN Plus shell, into which calculation routines previously developed by the authors had to be introduced in order to enable the calculation of the plate units. For the thermocompressor, a simulation code based on the solution of a design equation and the overall mass and energy balances was formulated and then introduced into ASPEN. In the validation step, simulation results were compared with operating data of the industrial plant, and a good agreement was verified. A sensitivity analysis of the concentrating system was then performed, considering two different operating variables, namely the milk inlet temperature and the motive steam pressure in the thermocompressor.

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Numerical Simulation of an Ethylene Re-Liquefaction Plant

Cited by 10 publications

References 0 publications

Analysis of Mixing Processes of LPG Gases in Tanks When Transporting by Sea

Analysis of Mixing Processes of LPG Gases in Tanks When Transporting by Sea

An ejector-enhanced re-liquefaction process (EERP) for liquid ethylene vessels

PERFORMANCE ANALYSIS of the MILK CONCENTRATING SYSTEM FROM A BRAZILIAN MILK POWDER PLANT

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