Development of Steam Separator Performance Analysis Code and Its Validation, (III)

Abstract

The purpose of the present study is to develop computer program models in the separator to analyze the behavior of droplets (carryover) which are ejected from the separator on the basis of physical understanding of phenomena. Firstly, the behavior of steam, liquid film, liquid droplets, and void in the separator are calculated using basic conservation equations coupled with empirical correlations derived from the mock-up test. The behavior of droplets, droplets ejected from the separator are analyzed by the following method. Steam velocity outside the separator was calculated with the versatile 3-dimensional flow analysis code in advance, and the trajectory of each liquid droplet was calculated with the Monte Carlo method.

Wetness fraction around the rated condition of the ATR-type separator was calculated with the developed computer program, and compared with the measured data outside the separator. Good agreement was obtained between calculated and measured results.

KEYWORDS:

• carryover
• Performance
• computer codes
• steam separators
• droplets
• Monte Carlo method
• droplet tracking
• two-phase flow
• liquid film
• three-dimensional analysis
• accuracy