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22 results on '"Lim, Wonsub"'

20. Optimization of driver selection for minimizing cost on LNG plant considering risk factor.

Author

Lee, Inkyu, Tak, Kyungjae, Lim, Wonsub, Moon, Il, and Choi, Kwang-ho

Abstract

The natural gas liquefaction process is an cryogenic system so it is very energy and cost intensive. There are several ways to reduce energy and cost consumption. One is getting optimal design and the other is getting optimal operating condition. After determined the process design, then optimize operating conditions such as temperatures, pressures and compositions. In this paper, to get optimal design in point of cost, optimization of driver selection is performed considering risk factor on C3-MR (propane pre-cooling mixed refregerant) process. Driver selection includes capital and operating cost. Capital cost could just get from venders but operating cost is very changeable. To solve driver selection more accurate, our team consider not only cost of fuels and electrics but also risk factor as the cost term. There are three scenarios to compare effects of risk factor. Risk factor depends on number of compressors which is connected to same driver. Each case is selected from mixed integer non-linear programming (MINLP) optimization results. The result is significantly different considering risk factor or not. [ABSTRACT FROM PUBLISHER]

Published
2012

21. Synthesis of Jatropha Curcas biodiesel and physicochemical investigation of molecular interactions in Jatropha Curcas biodiesel+C2-C3-alkanol blends.

Author

Kumar, Satish, Lim, Wonsub, Kumar Sharma, Vinod, Kumar Garg, Sunil, and Moon, Il

Subjects
*JATROPHA, *BIODIESEL fuels, *MOLECULAR interactions, *ALCOHOLS (Chemical class), *BINARY mixtures, *MOLECULAR volume
Abstract

Abstract: The physicochemical properties such as densities and speeds of sound have been measured for Jatropha Curcas biodiesel (1)+ethan-1-ol or propan-1-ol (2) binary mixtures over entire composition range at T =(288.15 to 308.15) K and atmospheric pressure. The measured data have been utilized to determine excess molar volumes V 12 E , isentropic compressibilities (κ S )12, and deviations in isentropic compressibilities (Δκ S )12. The V 12 E and (Δκ S )12 values were fitted to Redlich–Kister polynomial equation to calculate the adjustable parameters together with their standard deviations. The measured data and derived physical properties have been discussed in terms of the dipole–dipole, dipole induced–dipole interactions, and hydrogen bonding between fatty acid methyl esters (biodiesel) and ethan-1-ol or propan-1-ol molecules and their structural factors. [Copyright &y& Elsevier]

Published
2013
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