Influence of working fluid evaporation temperature in the near-critical point region on the effectiveness of ORC power plant operation

Nowak, W.; Borsukiewicz-Gozdur, A.; Wiśniewski, S.

doi:10.2478/v10173-012-0019-7

Cited by 5 publications

(5 citation statements)

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“…In addition, an interesting conclusion was reached by the authors [35] who found that in certain variants of the power plant, where the fluid is evapo- rated in near-critical conditions the capacities achieved may be higher than in the use of supercritical cycle. Similar conclusions, however, for the subcritical cycle are given in [36]. The authors [36] highlight the advantages of the use of the evaporation agent in the near-subcritical conditions and the impact of evaporator work parameters on the efficiency of the ORC power plant.…”

Section: Supercritical Orc Power Plants Powered By the Energy From Bi...supporting

confidence: 52%

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Selected aspects of operation of supercritical (transcritical) organic Rankine cycle

Mocarsk¹,

Borsukiewicz-Gozdur²

2015

Archives of Thermodynamics

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The paper presents a literature review on the topic of vapour power plants working according to the two-phase thermodynamic cycle with supercritical parameters. The main attention was focused on a review of articles and papers on the vapour power plants working using organic circulation fluids powered with low- and medium-temperature heat sources. Power plants with water-steam cycle supplied with a high-temperature sources have also been shown, however, it has been done mainly to show fundamental differences in the efficiency of the power plant and applications of organic and water-steam cycles. Based on a review of available literature references a comparative analysis of the parameters generated by power plants was conducted, depending on the working fluid used, the type and parameters of the heat source, with particular attention to the needs of power plant internal load.

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Section: Supercritical Orc Power Plants Powered By the Energy From Bi...supporting

confidence: 52%

“…Similar conclusions, however, for the subcritical cycle are given in [36]. The authors [36] highlight the advantages of the use of the evaporation agent in the near-subcritical conditions and the impact of evaporator work parameters on the efficiency of the ORC power plant.…”

Section: Supercritical Orc Power Plants Powered By the Energy From Bi...supporting

confidence: 52%

Selected aspects of operation of supercritical (transcritical) organic Rankine cycle

Mocarsk¹,

Borsukiewicz-Gozdur²

2015

Archives of Thermodynamics

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“…Work analysis of ORC systems is the subject of many papers. These analyses concern many aspects, including: the selection of suitable evaporation temperature, type of working fluid [1,2] or ORC systems connectivity with other energy systems [3,4].…”

Section: Introductionmentioning

confidence: 99%

Influence of the type of working fluid in the lower cycle and superheated steam parameters in the upper cycle on effectiveness of operation of binary power plant

Stachel

Wiśniewski

2015

Archives of Thermodynamics

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In the paper presented have been the results of the analysis of effectiveness of operation of binary power plant consisting of combined two Clausius-Rankine cycles, namely the binary cycle with water as a working fluid in the upper cycle and organic substance as a working fluid in the lower cycle, as well as a single fluid component power plant operating also in line with the C-R cycle for superheated steam, with water as a working fluid. The influence of the parameters of superheated steam in the upper cycle has been assessed as well as the type of working fluid in the lower cycle. The results of calculations have been referred to the single-cycle classical steam power plant operating at the same parameters of superheated steam and the same mass flow rate of water circulating in both cycles. On the basis of accomplished analysis it has been shown that the binary power plant shows a greater power with respect to the reference power plant.

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“…The results indicated that the evaporator's internal and external entropy generation was the main source of total entropy generation, and the maximum cycle efficiency of the testing system is 5.2%. With the deepening of the study, the singular properties of organic fluids in near-critical region and the near-critical cycle walk gradually into researchers' vision [7][8][9][10][11][12]. With an eye to the large drastically of fluid thermo physical and transport properties in near-critical region, Trela [10] proposed a method for determination of the near-critical region that is based on variations of specific heat capacity along isobars.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Near-Critical and Subcritical Organic Rankine Cycle

Wang

Weng

Yang

et al. 2013

AMM

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In this paper, three typical working fluids were selected for the near-critical ORC and subcritical ORC. The difference of performance between the near-critical ORC and subcritical ORC was analyzed by establishing the thermodynamic model. The reason for difference was analyzed in terms of the thermophysical properties. The results indicate that the performance of the near-critical ORC is better than the subcritical ORC. The net absorbed heat, net power and efficiency of the near-critical ORC vary slowly with the vapor generation temperature, which means that the near-critical ORC has good off-design performance. The dry working fluid R236fa is best adapted for the near-critical ORC among the three working fluids. The singular performance of the near-critical ORC depends on the properties of latent heat and type of working fluid in near-critical region.

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Influence of working fluid evaporation temperature in the near-critical point region on the effectiveness of ORC power plant operation

Cited by 5 publications

References 1 publication

Selected aspects of operation of supercritical (transcritical) organic Rankine cycle

Selected aspects of operation of supercritical (transcritical) organic Rankine cycle

Influence of the type of working fluid in the lower cycle and superheated steam parameters in the upper cycle on effectiveness of operation of binary power plant

Performance Analysis of Near-Critical and Subcritical Organic Rankine Cycle

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