Page 210 - Design of Solar Thermal Power Plants

194 3. GENERAL DESIGN OF A SOLAR THERMAL POWER PLANT

18. Maximum annual water consumption during project construction
and total annual water consumption during project operation.
19. Power plant construction period: In northwestern areas of China,
the construction period of a 50 MW power plant normally does
not exceed 30 months; whereas that of a 100 MW power plant
normally does not exceed 42 months.
20. Power plant operation period: Normally to be 25 years

3.6 DESCRIPTION OF GENERAL PARAMETERS
OF THE POWER PLANT

Below are the items described in the overall technical parameters of an
CSP plant; after completion of design, explanation to the following items
shall be provided.
1. Concentrator: Area and dimension of aperture of a single
concentrator. Tracking modes include azimuth/altitude angle,
working wind speed corresponding to open-loop/close-loop design
precision, protective wind speed.
2. Concentration field: Concentrating forms include parabolic trough
and tower, etc. Maximum power projected on the receiver from
the concentration field, concentration field aperture area.
3. Receiver: Structural forms mainly include cavity-type, cylinder-
type, and evacuated tube-type. Receiver water inlet temperature,
receiver outlet pressure, receiver outlet temperature, receiver fluid
flow rate.
4. Steam turbine generator: Inlet steam pressure of steam turbine; inlet
steam temperature of steam turbine; maximum temperature of
condensate water; generator outlet voltage.
5. Thermal storage: Thermal capacity, temperature, volume, necessary
time for full-load power generation of steam turbine.
6. Backup emergency power supply: power, AC uninterruptible power
supply and 220 V DC power supply
7. Power access: Voltage, transformer power
8. Grid access: Voltage, current, and time period

3.7 CALCULATION OF ANNUAL POWER
GENERATION

In a regular project, it is normally the owner who firstly proposes to
construct a power plant with an expected capacity, and the design unit
shall calculate annual power generation of the power plant and