Energy, Exergy, and Economic Analyses of a Combined Heat and Power Generation System with a Gas Turbine and a Horizontal Axis Wind Turbine

Document Type : Research Article

Authors

Department of Mechanical Engineering, Shahrood Branch, Islamic Azad University, Shahrood, I.R. IRAN

Abstract

Using the Combined Heat and Power (CHP) systems is known as one of the most effective ways to raise the power coefficient and reduce fuel consumption and operational costs. In this study, a CHP system with the prime movers of a gas turbine and a horizontal axis wind turbine under the strategy of providing electric charge has been investigated based on the first and second laws of thermodynamics. This study aims to evaluate the effect of a wind turbine on the CHP system. The results show that the proposed CHP system has significant advantages compared to the CHP system working without the wind turbine. The best operating condition for the wind turbine is at the wind speed of 12 m/s, a pitch angle of 5ο, and a tip speed ratio of 3. Moreover, the effects of the wind speed and tip speed ratio on the exergy efficiency of the total system become considerable when the gas turbine works at high-pressure ratios (more than 10) and the combustion chamber temperature is below 1250 οC. Also, it is shown this integrated system can reduce operational costs and fuel consumption by 55 % and 60%, respectively. Finally, regarding the interest rate, the payback period will be equal to 5.4 years.

Keywords

Main Subjects

References

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