Exergoeconomic analysis and optimization of a condenser for a binary mixture of vapors in organic Rankine cycle

Li, You–Rong; Du, Mei-Tang; Wu, Shuang–Ying; Peng, Lan; Liu, Chao

doi:10.1016/j.energy.2012.01.064

Cited by 23 publications

(10 citation statements)

References 31 publications

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“…The organic working fluid is heated in the evaporator and the generated vapor is expanded in the turbine or expander that converts thermal energy into mechanical work. In order to understand the main influence factors on the performance of the ORC system, some assumptions are adopted as follows: (i) Both the pressure drop in the pipes and the heat lose to the environment are neglected in the steady state operation of the ORC system [33]; (ii) The isentropic efficiencies of the turbine and the pump are 85% [16] and 80% [34], respectively; and (iii) The saturated vapor and the saturated liquid are considered at the turbine inlet and the condenser outlet, respectively. Therefore, the evaporator and the condenser are important devices in the ORC system.…”

Section: Cost-effective Model Of Organic Rankine Cycle Systemmentioning

confidence: 99%

Effect of pinch point temperature difference on cost-effective performance of organic Rankine cycle

Wang

et al. 2013

Int. J. Energy Res.

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SUMMARY In this paper, the effect of the pinch point temperature difference (PPTD) in an evaporator and a condenser on the performance of the organic Rankine cycle system has been evaluated for several potential organic working fluids, including R11, R123, R141b, toluene, R114 and n‐pentane, and so on. The net power output per heat transfer area of heat exchangers is used as the objective function in recovering the low grade waste heat of the flue gas released by an industrial boiler. The results indicate that there exists an almost same optimal evaporating PPTD to achieve their respective optimal cost‐effective performance for different organic working fluids under the same condition. With the increase of the total PPTD, the ratio between the evaporating PPTD and the condensing PPTD corresponding to the optimal cost‐effective performance increases. Meanwhile, the evaporating temperature has a little influence on the optimal PPTD assignment. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Cost-effective Model Of Organic Rankine Cycle Systemmentioning

confidence: 99%

Effect of pinch point temperature difference on cost-effective performance of organic Rankine cycle

Wang

et al. 2013

Int. J. Energy Res.

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“…Shu et al analyzed multi‐approach evaluation system of ORC from the perspectives of the first law of thermodynamics, the second law of thermodynamics, and thermal economy. Li et al put forward the exergy analysis and performance optimization of condensers. Wang et al concluded that the comprehensive performance of R245fa was optimal by using the multi‐objective method of thermal efficiency, exergy efficiency, investment payoff period, and annual emission reduction.…”

Section: Introductionmentioning

confidence: 99%

Exergy analysis of a 1.2 MW waste heat power generation project

Hou

Shao

Wei

et al. 2019

Heat Trans. Asian Res.

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According to systematic features, analysis method based on exergy balance is established. Basic indicators in the system, the subsystem, and facilities are put forward in this paper. By using this method to analyze the generation system of megawatt‐scale in one chemical enterprise, it is found that the objective exergy efficiency of the system is 35.67%, and exergy loss of organic Rankine cycle (ORC) is the highest. The thermal efficiency of the total system is 9.61%. For the condenser, the thermal efficiency is 91.18%, and the exergy efficiency is only 23.44%. The objective exergy efficiency of the evaporator is 74.04%. The influence coefficient of exergy loss of condenser is higher than that of pump and expander, but input exergy of the condenser is lower than that of the expander. It is revealed that ORC subsystem is the part which needs to be focused on, and the condenser is the most important component of ORC subsystem which should be optimized firstly.

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“… investigated the behavior of some zeotropic mixtures under various operating conditions of an internal combustion engine. Additionally, the performance of a condenser for a binary mixture was explored in detail by a few researchers . According to the results of an exergoeconomic analysis on zeotropic mixtures, Li et al .…”

Section: Introductionmentioning

confidence: 99%

“…According to the results of an exergoeconomic analysis on zeotropic mixtures, Li et al . proposed that the counter flow condenser had the lowest annual total cost among three different kinds of condensers. Liu et al .…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the performance of ORC power system using zeotropic mixture R601a/R600a

Wang

Liu

Ding

et al. 2016

Int. J. Energy Res.

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Summary An experimental study on the practical performance of organic Rankine cycle (ORC) system using zeotropic mixture is performed by using a small scale ORC power generation experimental setup. R601a/R600a is selected as the working fluid. The effects of mixture composition, heat source temperature, and working fluid flow rate on the performance of ORC system are investigated. The experimental results indicate that the net power output first increases and then decreases as the R600a concentration increases. The optimal mixture composition with the maximum net power output is 0.6/0.4 (mass fraction) at the heat source temperature of 115°C. The net power output of R601a/R600a (0.6/0.4) is higher than that of R601a by 25%, indicating that the performance of ORC system can be clearly improved by using the zeotropic mixture. For a fixed working fluid flow rate, both net power output and thermal efficiency first decrease slowly and then drop sharply with the decrease of the heat source temperature. The appropriate superheat degree of R601a/R600a is in the range of 15 to 20°C when the heat source temperature has a small variation. In addition, the optimal working fluid volume flow rates yielding the maximum net power output are obtained for different compositions of R601a/R600a. The experimental results in the study can be of great significance for the design and operation of ORC power system using zeotropic mixture. Copyright © 2016 John Wiley & Sons, Ltd.

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Exergoeconomic analysis and optimization of a condenser for a binary mixture of vapors in organic Rankine cycle

Cited by 23 publications

References 31 publications

Effect of pinch point temperature difference on cost-effective performance of organic Rankine cycle

Effect of pinch point temperature difference on cost-effective performance of organic Rankine cycle

Exergy analysis of a 1.2 MW waste heat power generation project

Experimental investigation on the performance of ORC power system using zeotropic mixture R601a/R600a

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