Page 242 - Design of Solar Thermal Power Plants

CHAPTER
4

Design of the Concentration

System

4.1 GENERAL SYSTEM DESCRIPTION

4.1.1 Constitution of the Concentration System
The solar-concentrating system consists of the solar concentrator as well
as other units with various functions: solar field control, communication,
power supply, optical precision measurement and calibration, security
monitoring, solar irradianceeambient air temperatureewind speed
measurement, concentrator cleaning, etc.
The qualified power plant shall also be equipped with cloud-cover and
wind-speed forecast units, which normally provide an additional 5 min
before strong wind and cloud-cover events so that security and safety
measures and can be taken to mitigate the risks of personal and property
damage.

4.1.2 Principles and Modes for Concentrator Adjustment and
Control

The concentrator serves as a light source for the receiver, the aimpoint
adjustment of which shall be based on the receiver’s working status.
Electrical interlocking, signaling, and communication facilities shall be
set between the concentrator and receiver. In the event of overheating on
the heat absorber surface in a solar tower power plant, the action of the
heliostat field must be considered so as to guarantee the safety of the
receiver, the solar tower, etc. Due to the comparatively large area of
the heat absorber plus the changing conditions of the meteorological
environment and changing solar position, it is difficult to locate the
overheating spot on an entire piece of heat-absorbing surface using

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https://doi.org/10.1016/B978-0-12-815613-1.00004-3 225 Published by Elsevier, Inc. under an exclusive license
Design of Solar Thermal Power Plants
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