A study on the pressure gradient characteristics inside tube in shell-and-tube heat exchanger
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This study investigates the pressure gradient characteristics of the evaporator, a shell and tube-type heat exchanger used as a major component of the organic Rankine cycle, where the cooling water from the main engine's jacket is used as a heat source and the cold heat generated by the vaporizing LNG as a heat sink. At vapor qualities above 0.5, the two-phase frictional pressure drop correlations of Friedel and Muller-Steinhagen and Heck demonstrated almost similar values, unlike other correlations. However, at vapor qualities less than 0.5, the correlation of Muller-Steinhagen and Heck increased linearly between the homogenous flow model and Friedel correlation. The two-phase pressure gradient caused by acceleration was considerably lower, corresponding to approxi-mately 1–9% of the frictional pressure gradient, and the two-phase frictional pressure drop accounted for most of the total pressure drop.
Abstract
This study investigates the pressure gradient characteristics of the evaporator, a shell and tube-type heat exchanger used as a major component of the organic Rankine cycle, where the cooling water from the main engine's jacket is used as a heat source and the cold heat generated by the vaporizing LNG as a heat sink. At vapor qualities above 0.5, the two-phase frictional pressure drop correlations of Friedel and Muller-Steinhagen and Heck demonstrated almost similar values, unlike other correlations. However, at vapor qualities less than 0.5, the correlation of Muller-Steinhagen and Heck increased linearly between the homogenous flow model and Friedel correlation. The two-phase pressure gradient caused by acceleration was considerably lower, corresponding to approxi-mately 1–9% of the frictional pressure gradient, and the two-phase frictional pressure drop accounted for most of the total pressure drop.
참고문헌 (13)
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