Power characteristic for BE12500

Geometric parameters of the industrial BE12500 reactor were made dimensionless as required by the correlation equations. Table B.5 gathers the values of the dimensionless parameters used. A mean blade height $b=370.5~mm$ was used for the turbofoil turbine since blade height varies in the range $265-476~mm$ for the turbine. The equivalent blade height was estimated as

$$b_{eq}=\frac{n_p}{2.} b$$ (32)

since each impeller blade is equivalent to 0.5 paddle.

Table B.5: Dimensionless parameter for the BE12500.

$\frac{b_{eq}}{D}$	$\frac{d}{D}$	$\frac{H}{D}$	$\frac{B_w}{D}$
$0.316$	$0.51$	$1.33$	$0.073$

Table B.6 gathers calculated parameters for the BE12500 reactor.

Table B.6: Correlation parameters for the BE12500 reactor.

$A$	$B$	$p$	$C$	$N_{e,\infty}$	$N_{e,max}$	$\frac{N_{e,max}}{N_{e,\infty}}$	$\frac{N_{e,B}}{N_{e,\infty}}$	$\theta$
$74.10$	$3.825$	$2.293$	$1.212$	$0.404$	$4.624$	$11.44$	$5.55$	$30^o$

Figure B.3 shows:

1. the ``no baffle'' curve
   

   $$N_e=\frac{A}{Re}+B \left(\frac{10^3+0.6 \cdot f \cdot Re^\a... ...10^3+1.6 \cdot f \cdot Re^\alpha} \right)^p \sin \theta^{1.2}$$ (33)

   
   

2. the ``two baffles'' curve
   

   $$N_e=\frac{A}{Re}+B \cdot C \cdot \frac{N_{e,B}}{N_{e,\infty... ...10^3+1.6 \cdot f \cdot Re^\alpha} \right)^p \sin \theta^{1.2}$$ (34)

   
   

3. the ``fully baffled'' curve
   

   $$N_e=\frac{A}{Re}+B \cdot \frac{N_{e,max}}{N_{e,\infty}} \le... ...10^3+1.6 \cdot f \cdot Re^\alpha} \right)^p \sin \theta^{1.2}$$ (35)

   
   

Results of CFD simulations were compared to the ``two baffles'' curve.

Figure B.3: Power characteristic theoretically derived for BE12500.

CE12500 and BE12500 use the same vessel and a different kind of impeller. This difference leads to a different power characteristic. Power dissipation is larger for BE12500 (turbofoil turbine) than for the CE12500 (retreated curved blade impeller). Comparison between the two baffles power characteristics is shown in Figure B.4.

Figure B.4: Power characteristics theoretically derived for CE12500 (retreated curved blade impeller) and BE12500 (turbofoil turbine).