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압력변화(대기압이하)에서 Methand-Methylacetate계에 대한 기-액평형치의 추산
심홍섭 영남이공대학 1998 論文集 Vol.27 No.-
The vapor-liquid equilibrium for the binary methanol-methylacetate system was investigated under the subatmospheric pressure. From the relation between logarithmic values of relative volatitity(logα) and liquid phase composition(x) under the various subatmospheric pressure an empirical equation, by which x-y data for the various pressure could be estimated, was obtained. And the vapor-liquid equilibrium data for methanol-methylacetate system were measured at 300 mmHg, 500 mmHg and 700 mmHg. The x-y data estimated by the proposed equation were compared with the experimental data, and proved to be in a good coincident within small error range.
심홍섭,구본식,전정호 영남이공대학 산업기술연구소 1998 産業技術硏究 Vol.11 No.-
The result of steady-state network medel made up of underground pipelines and governor stations are presented. Using Hardy-Cross method, the algorithm as well as program for network analysis of gas flow has been developed. Basic language has been used for implementation. When the input parameters such as input pressure and discharge flow are known, the network analysis can be formed. The network model proposed in this paper is based on the fact that the continuity equation at each node is zero. In the steady-state analysis of gas pipeline network, the sum of pressure loss is zero at each loop system. Steady-state node pressure, flow, velocity and pressure loss in a gas pipeline can be found using the input data such as gas specific gravity(relative to air), pipe diameter, pipe length, gas flow of consumption and input pressure in the model.
Methanol-Alkylacetate系의 氣液平衡 및 比揮發度와 液組成의 關係
沈弘燮 영남이공대학 1974 論文集 Vol.3 No.-
VTalxrr-liquid equilibrium data were reported for binary system methanol?-propylacetate at atmospheric pressure. The consistency of x-y data were checked by means of Herington's consistency test method. It was discussed the relations of liquid phase compositions with activity coefficients and Q-fucntions. The study showed that the relations between logarithmic values of relative volatility (loga) and liquid phase composition (x) in the four binary methanol with methylacetate, ethylacetate, n-propylacetate and n-butylacetate systems might be expressed as linear functions. This study proposed the empirical equation with which x-y data for each binary system of methanolalkylacetate could be estimated. And the x-y data estimated by the proposed equations were compared with experimental data, and observed a good coincidence with them.
Ethanol-n-Propylacetate系의 氣液平衡 및 比揮發度와 液組成의 關係
沈弘燮 영남이공대학 1977 論文集 Vol.6 No.-
Vapor-liquid equilibrium data were reported for binary system ethanol-n-propylacetate at atmospheric pressure. The consistency of x-y data were checked by means of Herington's consistency test method. This study showed that the relations between logarithmic values of relative volatility (logo) and liquid phase composition (x) in the four binary ethanol with metnylacetate, ethylacetate, n-propylacetate and n-butylacetate systems might be expressed as linear functions. This study proposed the empirical equation with which x-y data for each binary system of ethanol-alkylacetate could be estimated. And the x-y data estimated by the proposed equations were compared with experimental data, and observed a good coincidence with them.