JakobCHR.com

Quick Navigation:
 

Personal:

 Go to Home
 MS Research
 PhD Research
 Curriculum Vitae

General:

 Linux

Soon to come:

 Matlab
 On-line Stores
 Cycling
 Medicine & Health
 LaTeX
 OOP & C++
 Sony PCM-R500 DAT

Downcomer flow path,

The mass flux in the downcomer, $\mbox{$<\!{G}\!>$}_{\framebox[1.5ex]{\raisebox{-2.2pt}[0pt][0ex]{\scriptsize 5}}}$ [ ${\mbox{kg}}/({\mbox{m}}^2\cdot{\mbox{s}})$], is given by

$$\mbox{$<\!{G}\!>$}_{\framebox[1.5ex]{\raisebox{-2.2pt}[0pt]... ...framebox[1.5ex]{\raisebox{-2.2pt}[0pt][0ex]{\scriptsize 5}}}}}$$ (5.21)

where $\mbox{$\dot{m}$}_i$ represents the total recirculation mass flow rate [kg/s].

The pressure change along the downcomer, $\Delta p_{\framebox[1.5ex]{\raisebox{-2.2pt}[0pt][0ex]{\scriptsize 5}}}$ [Pa], is taken as

$$\Delta p_{\framebox[1.5ex]{\raisebox{-2.2pt}[0pt][0ex]{\scr... ...5ex]{\raisebox{-2.2pt}[0pt][0ex]{\scriptsize 5}}}}^2}{2\rho_i}$$ (5.22)

The density of the water at the core inlet, $\rho_i$ [kg/${\mbox{m}}^3$], corresponds to the equilibrium enthalpy h_i (see (5.20)), ie

$$\rho_i = \rho_\ell(p,T_i)$$ (5.23)

where

$$T_i = T_\ell(p,h_i)$$ (5.24)

and p is the pressure at the downcomer inlet [Pa]^5.1. Note that wee have silently assumed that the feedwater is sufficiently subcooled such that all carry-under vapor is condensed and the combined fluid is subcooled. This assumption is in practice very sound since stability requirements^5.2 demand a certain amount of core inlet subcooling.

  Contents   Index  
 
 
 

Top Quality Developed with Danish Brain Power