Page 239 - Design of Solar Thermal Power Plants

222 3. GENERAL DESIGN OF A SOLAR THERMAL POWER PLANT

on tracking, slope of installation site of a parabolic trough
concentrator is required to be not more than 1%. Normally, in the
concentration field of power plant located in the northern area of
China, it is not necessary to design a drainage ditch.
A power tower plant normally uses the horizon of the receiver
tower as the zero elevation, and center of the tower as center of the
heliostat concentration field. For a northward concentration field,
in case of being a highland to the south of the concentration field,
it will facilitate the reduction of building height of the receiver
tower.

It is also possible for a power tower plant to mount all equipment within
the tower in order to save land. As shown in Fig. 3.68,interior of the receiver
tower contains all parts except for the heliostat concentration field of
the power plant (thermal receiver, thermal storage, steam generation,
power generation). Such layout pattern has great reference value for the
construction of a power plant while saving land. Of course, due to the
increase of load, building costs of the tower will be increased; yet for
areas with comparatively higher prices for land use, such layout pattern
can be applied.
Concentration field of a parabolic trough power plant has a strict
requirement on land evenness; the standard horizon of the entire plant
area can be selected to be consistent with the horizon elevation of the
concentration field. In case of concentration field wind wall being
designed in the power plant, special attention shall be paid to the design

FIGURE 3.68 Solar tower and heliostats of the power tower plant of the Korean Institute of
Energy Research (Located in DAEGU, Korea, October 2011).