A User's Manual for DELSOL3 - prod.sandia.gov - Sandia National ...

Ai (AREF) = 2780.0 m2.
Defaults for a cavity receiver are
vI;C,~ (REFRC) = 0.83
P:,,R (REFTHP) = 2.10 x lo8 watts
Ai, (AREF) = 761.0 m2.
III. C-4. Insulation Losses in Piping Runs-Only single module designs are
considered, and the following two assumptions are made:
1)
2)
The hot piping run can be expressed as some constant, tp~, times
the tower height, so that the total length is:
Lp = l p x ~ THT (1II.G - 13)
t p should ~ include the ground run to storage and the electric
generating subsystem (EPGS) plus any necessary expansion allowances.
The default value is based on an advanced salt design with storage
and EPGS within one THT of the base of the tower plus a 30% increase
for expansion:
lp,(FPLH) = 2.6
The pipe diameter, Dp, scales directly with the square root of the
flow rate, which is in turn directly proportional to the design
thermal power delivered to the downcomer from the receiver. Refer-
ring to the previous Section for nomenclature:
DP = PP ( t7RC,R,DPPth,R)0’5
where Pp = proportionality factor.
(II1.G - 14)
Piping losses are assumed to be proportional to the total pipe area. At the design
point:
PLOST,P = ~PLP(~DP)
(1II.G - 15)
where ap = proportionality factor. Combining Equations (1II.G-13), (1II.G-14),
and (1II.G-15) and defining af> = ntrppp,
83