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Subcooled boiling heat transfer

Returning to the subcooled boiling region we can according to Collier and Thome [19] use

$$q_w'' = h_{\mbox{\protect\scriptsize NcB}}(T_w - T_{\mbox{\... ...ptsize sat}}) + h_{\mbox{\protect\scriptsize c}}(T_w - T_\ell)$$ (11.51)

in connection with Chen's correlation. In this case $h_{\mbox{\protect\scriptsize c}}$ is calculated by (11.44) with F=1 and $h_{\mbox{\protect\scriptsize NcB}}$ is obtained by (11.49) where S is calculated at ${\mbox{Re}}_{\mbox{\protect\scriptsize TP}} = \mbox{\bf Re}_f$.

It is not clear in [19] how the properties should be evaluated but we assume that $h_{\mbox{\protect\scriptsize NcB}}$ is evaluated at the local saturation pressure and $h_{\mbox{\protect\scriptsize c}}$ is evaluated using the bulk or mean liquid temperature, $T_\ell$ ( $T_\ell < T_{\mbox{\protect\scriptsize sat}}$!).

 
 

 
 

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