• The Journal of Fisheries Business Administration
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• v.43 no.2
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• pp.1-14
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• 2012

The main purpose of this study is to analyze the effect of Korea-China free trade agreement(FTA) on Korea's fisheries trade using the partial equilibrium analysis model of Feenstra(1995). The study tries to show the impact on trade flows and welfare of the elimination of tariffs Korea-China FTA on Korea's fisheries sector among several scenarios of trade liberalization. The results of the study indicate that the increase of fisheries export to China is lower than that of fisheries import from China. Therefore Korea-China FTA results in the decrease of domestic of fisheries production even though total welfare effect is positive. The study suggest several policy proposals for soft-landing of Korea-China FTA on Korea's fisheries sector. One of them is to lengthen the term of tariff elimination to minimize the impact on domestic fisheries sectors.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.40 no.3
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• pp.181-189
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• 2016

An analytical model was developed by Sim to estimate the two-phase damping ratio for upward two-phase flow perpendicular to horizontal tube bundles. The parameters of two-phase flow, such as void fraction and pressure loss evaluated in the model, were calculated based on existing experimental formulations. However, it is necessary to implement a few improvements in the formulations for the case of tube bundles. For the purpose of the improved formulation, we need more information about the two-phase parameters, which can be found through experimental test. An experiment is performed with a typical normal square array of cylinders subjected to the two-phase flow of air-water in the tube bundles, to calculate the two-phase Euler number and the two-phase friction multiplier. The pitch-to-diameter ratio is 1.35 and the diameter of cylinder is 18mm. Pressure loss along the flow direction in the tube bundles is measured with a pressure transducer and data acquisition system to calculate the two-phase Euler number and the two-phase friction multiplier. The void fraction model by Feenstra et al. is used to estimate the void fraction of the two-phase flow in tube bundles. The experimental results of the two phase friction multiplier and two-phase Euler number for homogeneous and non-homogeneous two-phase flows are compared and evaluated against the analytical results given by Sim's model.