Page 222 - Design of Solar Thermal Power Plants

3.7 CALCULATION OF ANNUAL POWER GENERATION 205

8500 1100

1 - Thermal power/kW
2
6800 2 - DNI/(W/m ) 880
Simulation time =1,920.00 h
2 660
Thermal power/kW 3400 1 440 DNI/(W/m 2 )
5100

1700 220

0 0
1896.00 1898.00 1900.00 1902.00 1904.00 1906.00 1908.00 1910.00 1912.00 1914.00 1916.00 1918.00 1920.00
Time/h
FIGURE 3.51 Relationship between the concentration power projected by heliostat con-
centration field onto the receiver and direct normal irradiance on the spring equinox.

8700 1100

1 - Superheated steam flow/(kg/h)
6960 880
2 - DNI/(W/m ) 2 2
Superheated steam flux/(kg/h) 5220 1 440
Simulation time =1,920.00 h

3480
660 DNI/(W/m 2 )

1740 220

0 0
1896.00 1898.00 1900.00 1902.00 1904.00 1906.00 1908.00 1910.00 1912.00 1914.00 1916.00 1918.00 1920.00
Time/h
FIGURE 3.52 Relationship between the outlet superheated steam flow of receiver of
Badaling power plant and direct normal irradiance on the spring equinox.

can be calculated, which is shown in Fig. 3.51. Under the premise of
the inlet and outlet temperatures being set, the relationship between the
outlet superheated steam flux of receiver (Curve 1 in the figure) and DNI
(Curve 2 in the figure) is shown in Fig. 3.52.
The relationship between the whole-day generating capacity (Curve 1
in the figure) and solar DNI (Curve 2 in the figure) is shown in Fig. 3.53.