Volume 2, Issue 2 (3-2017)                   jste 2017, 2(2): 46-52 | Back to browse issues page

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Thermodynamic modeling and performance analysis of a novel and modified Organic Rankine Cycle(ORC) equiped with ejector and regenerator. jste. 2017; 2 (2) :46-52
URL: http://yujs.yu.ac.ir/jste/article-1-54-en.html
Abstract:   (5615 Views)

Due to pollution and limited fossil fuels, renewable sources can be considered the main alternative of these resources. Generally, the organic Rankine Cycle(ORC) uses renewable Low Grade Heat Source(LGHS) such as solar, geothermal and etc. In this study a novel configuration of ORC has been proposed to improve the efficiency and power generation using both of an ejector and a regenerator. In this cycle an ejector with a regenerator have been integrated in ORC. Also a dual-stage evaporator has been used. Steam from the second stage evaporator is entered to ejector as the primary fluid and after the pressure decrement tends to increase of the suction of the secondary fluid from the steam turbine outlet. This modification tends to the higher power generation. Also steam enters to the regenerator prior to the ejector and in this way a part of energy of needed for the first stage evaporator is supplied and the efficiency is increased. For thermodynamic modeling a code was developed in the Engineering Equation Solver(EES) software. In addition different working fluids were examined to evaluate of the thermodynamic performance of the proposed cycle. The results show that the efficiency of the cycle increased 17.5% compared to the ORC in the best case(depending on the working fluid). To evaluate of the thermodynamic parameters on the efficiency and output power, parametric study was done. The fluid with the highest efficiency was R245fa.

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Type of Study: Research | Subject: Special
Received: 2016/07/30 | Accepted: 2016/11/6 | Published: 2017/04/4

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