2상의 액체를 형성하는 증기의 응축에 대한 평형방법의 평가

Abstract

2상의 액체를 형성하는 증기의 응축에 대한 열적 성능 및 압력 강화를 예측하기 위해 평형방법을 적용하여 수치모사를 수행하고 실험결과를 비교하였다. 상업적인 실제 설계에 통용되고 있는 평형방법은 2상의 응축액을 형성할 수 있는 증기로부터 단일상만 응축되는 경우의 수치모사에 적용하기에는 극히 적절치 못한 것으로 판명되었다. 이런 유형의 응축현상을 잘 모사하기 위해 수정된 평형방법을 제시하였으며, 이를 통하여 평형방법이 현저히 개선되는 결과를 얻었다.

The ability of the equilibrium method to predict thermal performance and pressure drop in condensation of vapors forming two-phase liquid has been assessed by simulating the experimental data. It has been found that the equilibrium method, as used in current industrial design practice, gives significantly poor predictions of condensation of a single phase alone from a mixture which may form a two-phase condensate. A modification has been suggested to describe this kind of condensation, and this modification gave remarkable improvement over the unmodified equilibrium method.

The ability of the equilibrium method to predict thermal performance and pressure drop in condensation of vapors forming two-phase liquid has been assessed by simulating the experimental data. It has been found that the equilibrium method, as used in current industrial design practice, gives significantly poor predictions of condensation of a single phase alone from a mixture which may form a two-phase condensate. A modification has been suggested to describe this kind of condensation, and this modification gave remarkable improvement over the unmodified equilibrium method.