Exergy analysis of solar energy systems - Solar Energy Sciences and Engineering Applications - page 110

Figure 3.3.8 Effect of rise in ambient temperature on overall system energy and exergy efficiencies.
Figure 3.3.9 Effect of increase in solar flux on electrical and thermal energy and exergy efficiencies.
compared to individual systems. It is also observed that electrical energy efficiency is
not affected by a rise in ambient temperature but electrical exergy efficiency is affected
hence indicating that it is always better to conduct an exergy analysis.
The second parameter studied in this case study is solar flux. The effect of increase
in solar flux on energy and exergy efficiencies of an electrical and thermal system is
shown in Figure 3.3.9. The electrical energy efficiency remains constant at 9.46%
whereas electrical exergy efficiency decreases from 8.53% to 5.13%, respectively with