Abstract

The aim of this research is to investigate the effectof ambient air temperature on the steam generation. Aparametric study was performed based on exergy analysis tostudy the impact of ambient air temperature on second law ofefficiency, irreversibility and adiabatic flame temperature ofsteam generation. The results showed that at 25 percent excessair and with the range of ambient air temperature from 25 oCto 100 oC, the adiabatic flame temperature increases from 2015oC to 2065 oC. Also the results showed that the second lawefficiency and irreversibility ranges from 40.295% to 40.290%and 494.063 MJ to 494.161 MJ, respectively as the ambient airtemperature increases from 25 oC to 100 oC. It is included thatthe ambient air temperature has a minimum impact onadiabatic flame temperature and insignificant impact on boththe second law efficiency and irreversibility of overall steamgeneration. Also the combustion chamber and heat transfersections of steam generation were studied by using exergyanalysis. It was concluded that the ambient air temperature hasa minimum impact on both combustion chamber and heattransfer sections.