Aabs |
Outer area of the absorber
[m2] |
Ac |
Collector aperture area
[m2] |
APP |
Approach point[°C] |
C |
Capital cost [$] |
Cc |
Concentration ratio |
Cpa |
Specific heat of the air in the compressor
section |
\({\overset{\overline{}}{C}}_{\text{pg}}\) |
Mean specific heat of the
exhaust gases in the HRSG [J/kg.K] |
CpHTF |
Heat capacity of the Heat transfer fluid
HTF [kJ/kg.K] |
DNI |
Direct normal irradiation
[W/m2] |
F |
Correction factor |
h |
Enthalpy [kJ/kg] |
hs |
Steam enthalpy [kJ/kg] |
hw |
Water enthalpy [kJ/kg] |
LCOE |
Levelized cost of energy [$/kWh] |
\(f\) |
fuel by air ratio |
\({\dot{m}}_{a}\) |
Air mass flow [kg/s] |
\({\dot{m}}_{f}\) |
Fuel mass flow [kg/s] |
\({\dot{m}}_{g}\) |
Mass gas flow [kg/s] |
\({\dot{m}}_{s}\) |
Steam mass flow [kg/s] |
\({\dot{m}}_{\text{SF}}\) |
HTF mass flow rate [kg/s] |
NL |
Number of line in the solar
field |
\(P_{a}\) |
Atmospheric pressure [bar] |
pp |
Pinch point [°C] |
Q |
Heat exchanger duty [W] |
\(Q_{a}\) |
Assumed duty [W] |
\(Q_{\text{PTC}}\) |
Useful energy gained by the collector per unit of
time [MW] |
\(L_{\text{cv}}\) |
Natural gas calorific value
[kJ/kg] |
\(Q_{\text{SF}}\) |
Total useful energy gained in the SF per unit of
time [MW] |
PFP |
Pressure feed pump |
PSPT |
Steam turbine output
[MW] |
PGT |
Gas turbine output [MW] |
sfc |
specific fuel consumption of the gas turbine
[kJ/kg] |
ST |
Solar time [hour] |
T |
Temperature [K] |
Ta |
Ambient temperature [°C] |
Tabs |
Mean absorber pipe temperature
[°C] |
Ts |
Steam temperature [°C] |
Tsat |
Water saturation temperature
[°C] |
U |
Overall heat transfer coefficient [W/m2 K] |
UA |
Product of U and surface area A [W/K] |
Uabs |
Absorber thermal loss coefficient
[W/m2 K] |
ΔTpp |
Pinch point [°C] |
ΔTap |
Approach point [°C] |
∆TSF |
Temperature difference between inlet and
outlet of HTF [°C] |
TLM |
Logarithmic mean temperature difference
[°C] |