8
2.0 COLLECTOR
SPECIFICATIONS
2.1 CPK7210-N Flat Panel Collector
The Firebird CPK7210-N Flat Plate collector is specifically designed to
maximise the absorption and retention of solar radiation. The collector
contains an absorber plate made of copper and coated with a highly
selective TiNOX absorber. This surface greatly enhances the collector’s
ability to capture and retain solar energy.
A heat transfer fluid flows through a grid of double parallel copper
tubes which are ultrasonically welded to the back of the absorber
plate. The 40mm mineral wool insulation (U = 0.045 W/mK) on
the back of the absorber, protects the heat collected and aids
against heat loss. A sheet of 3.2mm toughened glass covers
the collector as it faces the sun, and this helps to prevent
most of the convection losses. Furthermore, it reduces heat
radiation from the absorber into the environment in a similar
way as a greenhouse does.
Figure 2.1 Cross-section of Firebird CPK7210-N Flat Panel Collector
Figure 2.2 Pipework arrangement of CPK7210-N Flat Panel Collector
The diagram on the right shows an overview of the
formation of pipework in the CPK7210-N collector.
The grid of double parallel copper tubes prolongs
the fluid flow through the collector, allowing a
balanced distribution and temperature difference
across the array of collectors.
COLLECTOR SPECIFICATIONS