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

V.A-10. Heat Exchangers Related to Generating EZectricitvThere are two op-
tions for calculating heat exchanger component costs, the first of which scales the
cost of a reference system based on thermal power into the heat exchangers (out
of storage), and the second of which scales the cost of a reference system based on
individual heat exchanger areas.
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a) ICHE = 0 (default)-cost scales with thermal power into the heat exchang-
ers based on a reference system:
~CHTXCHC, = CHE,REF
Pth,HE,REF
where CHE,REF = reference heat exchanger subsystem cost ($)
Pth = actual thermal power into the heat exchangers
Pth,HE,REF = reference design thermal power into the heat
exchangers (out of storage) (watts)
XHE,~ = scaling exponent
(V.A - 19)
Default values are based on proposed molten salt designs, and the total
subsystem cost includes an evaporator, superheater, and reheater:
CHE,~F (CHEREF) = $15.2 x loG
XHE,~ (XHEP) = 0.8
b) ICHE # 0-cost scales with individual heat exchanger areas based on a
reference system:
(V.A - 20)
where subscripts PH, EV, SH, and RH refer to the preheater, evaporator,
superheater, and reheater, respectively, and:
ni = number of type i heat exchangers
Ci,REF = reference cost of single type i heat exchanger ($)
Ai = area of heat exchanger i (me)
Ai,REF = area of reference type i heat exchanger (m2)