Volume 16, Issue 7 (9-2016)                   Modares Mechanical Engineering 2016, 16(7): 308-316 | Back to browse issues page

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Javaherdeh K, Alizadeh A, Zoghi M. Simulation of combined steam and organic rankine cycle from energy and exergoeconomic point of view with exhaust gas source. Modares Mechanical Engineering. 2016; 16 (7) :308-316
URL: http://mme.modares.ac.ir/article-15-3429-en.html
1- Instructor of Department of Mechanical Engineering, Faculty of Engineering, University of Guilan
Abstract:   (3458 Views)
In this study, at first the combined steam and organic Rankine cycles, have been stimulated with high-temperature wasted hot gases recovery, from the energy and exergoeconomic points of view. In the configuration of the combined cycles, the high-temperature wasted gases acts as the source of steam cycle evaporator, then the decreased temperature exhaust gas of the steam cycle evaporator, is used as the low temperature source of organic cycle evaporator. Afterward the effects of changing different parameters such as temperature of the evaporator and condenser of steam cycle and pinch temperature difference, on the amount of total output work, total irreversibility, energy efficiency, exergy efficiency and exergoeconomic variables have been checked. The results in base state show that, energy and exergy efficiency of combined cycles are 0.2782 and 0.5279 respectively and the amount of output work and total irreversibility are 71401kW and 43616kW respectively. Total exergoeconomic factor for the combined cycles is 12.47 percent, which represents a high exergy destruction in components and recommends raising the initial cost of components in order to improve the performance of system. The evaporator, turbine and condenser of steam cycle, are the components that should be considered from the perspective of the exergoeconomic, because they contains the maximum amount of total initial costs and the cost of exergy destruction.
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Article Type: Research Article | Subject: Thermodynamics
Received: 2016/05/10 | Accepted: 2016/06/17 | Published: 2016/07/27

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