**5. Conclusions**

268 Thermodynamics – Interaction Studies – Solids, Liquids and Gases

Figure 12 shows that an increase in the air temperature from the assumed temperature of the environment decreases the exergy efficiency, and under the other conditions,

decrease or increase of the exergy efficiency is greater with the natural gas.

(30 ) *C* 

Fig. 11. The diagram of boiler efficiency changes based on the air relative humidity

Fig. 12. The diagram of boiler efficiency changes based on the air temperature

percentage

The exergy analysis of the power plant cycle has shown that

