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

REFTIM
REFSOL
ASTART
IATM
ATMl
ATM2
ATM3
ATM4
178
Design point hour on or past noon on the REFDAY of the
year. If IPROB = 2, REFTIM is set equal to UTIME by code.
Constraint: REFTIM must be an integer multiple of HRDEL.
Default: REFTIM = 0.0 (noon) (1II.A-5,V.C-1)
Design point insolation, in kw/m2.
Default: REFSOL = 0.95 (kw/m2) (1I.G-2,1V.C-1)
Maximum sun angle (in degrees), with respect to the
vertical, at which the plant will begin operation.
Default: ASTART = 75.0 (")
(III.A-l,III.A-5)
Control parameter specifying atmospheric attenuation model:
= 0, 25 km visibility, Barstow, CA;
= 1, 5 km visibility, Barstow, CA;
= 2, user defined through variables ATM1, ATM2, ATM3,
ATM4.
Default: IATM = 0 (1II.G-1)
Variables for defining attenuation according to:
Fractional loss = ATMl + ATM2*R + ATM3*R2 + ATM4*R3
where R is the slant range (km) from the heliostat to
the receiver.
Constraint: IATM = 2 for user defined variables.
Default: ATMl = 0.006789
ATM2 = 0.1046
ATM3 = -0.0170
ATM4 = 0.002845 (1II.G-1)