Parametric Study of combined cycle power plant by Energy and Exergy Analysis located in Iran

Hassanzadeh Afrouzi, Hamid; Zare, Hossein; Seyedi, Seyed Mostafa

doi:10.48301/jear.2025.520502.1113

Parametric Study of combined cycle power plant by Energy and Exergy Analysis located in Iran

Document Type : Original Article

Authors

Hamid Hassanzadeh Afrouzi ¹

Hossein zare ²

Seyed Mostafa Seyedi ¹

¹ Department of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Iran

² Department of Chemical Engineering, Buein Zahra Technical University, Buein Zahra, Qazvin, Iran

10.48301/jear.2025.520502.1113

Abstract

In the present study, energy and exergy analysis of Neka combined cycle power plant in the north of Iran is carried out at minimum (220MW) and maximum (440MW) loads. With four units of 440MW, this power plant can produce 1760MW power. The effects of different parameters, including the outlet water sub-cooled temperature of condenser, ambient temperature, excess air, removing heaters, and sea temperature on power plant gross and net outputs and gross and net electric efficiencies, are examined. The obtained results show that the boiler accounts for the most exergy losses amongst the cycle components with so many differences compared to other components. Moreover, it was found that the effect of sea temperature is significant as for one degree of rising seawater temperature, the plant output power and cycle efficiency decrease by 1459 kW and 0.156%, respectively. Also, the optimal excess air for the minimum and maximum loads are the maximum and minimum amount, respectively. The results show that by augmenting the excess air from 0 to 25%, the gross power output reduces by about 2500 kW.

Keywords

Power plant

Exergy

Energy

Power output

Electric efficiency

Subjects

Mechanical Engineering

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