Solar driven advanced oxidation processes for water decontamination and disinfection - Solar Energy Sciences and Engineering Applications - page 397

Figure 13.2.1 Schematic representation of different concentrating and non-concentrating solar
collection geometries usually reported for photocatalytic applications.
Figure 13.2.2 Ray tracing approach showing the capability of CPC geometry to concentrate diffuse
solar radiation.
non-concentrating reactors with parabolic troughs (Curco et al., 1996; Malato et al.,
1997; Gimenez et al., 1999).
Probably, the most studied non-imaging reactor for AOP applications is the
compound parabolic collector (CPC). The most frequently quoted advantages of non-
imaging CPC reactors are their ability to use global solar radiation (radiation coming
from all directions in the sky, as shown in Figure 13.2.2), simplicity of operation,
and ability to operate in the turbulent flow regime (which improves mass transfer).
However, other non-imaging reactors offer these advantages in principle, to different
degrees. There are many possibilities for the geometry of the reflectors that illuminate
the tubes. Reflector geometries other than the CPC that have received attention in the