Exergy analysis of solar energy systems - Solar Energy Sciences and Engineering Applications - page 104

Figure 3.3.2 Effect of rise in ambient temperature on energy and exergy efficiencies of the system.
Figure 3.3.3 Effect of area of solar collector on energy and exergy efficiencies of the system.
life ambient temperature does play a role in performance determination of any system
as it is shown by exergy efficiency.
The effect of an increase in solar thermal area on energy and exergy efficiency of
the system is shown in Figure 3.3.3. It can be seen that an increase in solar thermal area
results in degrading performance of the system. The energy and exergy efficiencies are
found to be decreasing from 16.97% to 16.37% and 17.89% to 17.26%, respectively
with increase in solar thermal area from 700 m 2 to 1000 m 2 . Such results are obtained