Optimal Performance Characteristics of Subcritical Simple Irreversible Organic Rankine Cycle

Chen, Weijian; Feng, Huijun; Chen, Lingen; Xia, Shaojun

doi:10.1007/s11630-018-1049-5

Cited by 30 publications

(5 citation statements)

References 17 publications

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“…Therefore, low‐grade heat cycles such as the organic Rankine cycle (OR) and Kalina cycle would be the proper options 16,17 . Moreover, recycling waste heat energy from the top cycle can reduce greenhouse gas release and improve energy efficiency 18 …”

Section: Introductionmentioning

confidence: 99%

“…16,17 Moreover, recycling waste heat energy from the top cycle can reduce greenhouse gas release and improve energy efficiency. 18 The Kalina cycle was introduced in the early 1980s using a mixture of ammonia and water as the working fluid. Kalina cycle had remarkable improvements in the matter of thermal power plant design, and it can be considered as a rival to the ORC.…”

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confidence: 99%

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A comparison of using organic Rankine and Kalina cycles as bottom cycles in a solar‐powered steam Rankine cycle

Mirjavadi

Pourfayaz

Pourmoghadam

et al. 2022

Energy Science & Engineering

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This study has attempted to compare two thermodynamic cascade cycles, which in this paper are presented as Systems A and B. System A was consisted of a steam Rankine cycle (SRC) as a top cycle and an organic Rankine cycle (ORC) as a bottom cycle. System B was consisted of the same SRC as the top cycle and a Kalina cycle as the bottom cycle. The comparison of both systems has been made by changing a number of parameters. The chosen parameters for this comparison were bottom cycle mass flow rate, aperture area of the collector, top cycle condensing pressure, and bottom cycle turbine inlet and outlet pressures. Also, a short economic evaluation has been made between two proposed cascade cycles (Systems A and B). The result indicated that the Kalina cycle shows superiority over the ORC as the bottom cycle in a solardriven SRC. Furthermore, it was determined that the most effective parameters on the overall efficiency of the systems are the condensing pressure of the top cycle and the outlet pressure of the bottom cycle turbine. Also, among the chosen parameters, the outlet pressure of the bottom cycle turbine had the highest effect on the efficiency of the bottom cycles.Considering the economic aspect, the results showed that the levelized costs of energy for both systems are quite equal at 0.011 ($/kWh).

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

A comparison of using organic Rankine and Kalina cycles as bottom cycles in a solar‐powered steam Rankine cycle

Mirjavadi

Pourfayaz

Pourmoghadam

et al. 2022

Energy Science & Engineering

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“…Для утилизации низкопотенциальных источников энергии (например, тепловых отходов предприятий, выхлопных газов газотурбинной установки (ГТУ), продуктов сжигания биотоплива и других низкопотенциальных топлив) все чаще используются турбоустановки на низкокипящих рабочих телах (НКРТ) [1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. В случае когда рабочее тело имеет более низкую, чем у воды, температуру кипения, его испарение происходит при относи-тельно невысокой температуре, что и позволяет утилизировать низкопотенциальную энергию.…”

Section: Introductionunclassified

Trigeneration Turbine Units Based on Low Boiling Working Fluids

Ovsyannik

Kliuchinski

2022

Izv. vysh. ucheb

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A program that allows modeling, thermodynamically optimizing and performing exergetic analysis of more than a hundred different variations of the schemes of trigeneration turbine units based on low-boiling working fluids. With the aid of the program that had been developed, an exergetic analysis of six schemes of trigeneration turbine units on the organic Rankine cycle was performed, viz. on an overheated steam with a steam compression refrigeration unit; with an intermediate overheating of the working fluid and a steam compression refrigeration unit; on an overheated steam with a refrigeration unit with carbon dioxide production; with an intermediate overheating of the working fluid and a refrigeration unit with carbon dioxide production; on an overheated steam with a refrigeration unit with production carbon dioxide and cooling of the turbine condenser with liquid carbon dioxide; with intermediate overheating of the working fluid, a refrigeration unit with carbon dioxide production and cooling of the turbine unit condenser with liquid carbon dioxide. A gas turbine unit was used as an energy source for the above-mentioned schemes. The possibility of using the resulting liquid carbon dioxide to cool the condenser of a turbine unit on an organic Rankine cycle has been studied. A comparative analysis of two methods of obtaining cold (using a steam compression refrigeration unit and a refrigeration unit with carbon dioxide production) for use in trigeneration schemes has been carried out. The research was based on the method of exergetic analysis, the results of which are presented in the form of enlarged Grassmann – Shargut diagrams. A technical and economic analysis of the use of intermediate overheating in the organic Rankine cycle has been carried out, ozone-safe freon R245FA was used as the working fluid. Recommendations for the application of the studied trigeneration schemes on the organic Rankine cycle are formulated.

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“…Finite time thermodynamics (FTT) [1][2][3][4][5][6][7][8][9][10][11][12][13] has been applied to perform performance analyses and optimizations for various thermodynamic cycles and processes, including multi-stream heat exchange system [14], chemical reactors [15][16][17][18], electrochemical device [19], biological process [20], Novikov engines [21][22][23], Agrawal engine [24], Carnot engines [25,26], solar engine [27], internal combustion engine cycles [28][29][30][31][32], thermoelectric devices [33][34][35][36], cogeneration plants [37][38][39], ocean thermal energy conversion plants [40][41][42], Kalina cycle [43], Rankine cycles [44][45][46], Brayton cycles [47]…”

Section: Introductionmentioning

confidence: 99%

Optimal Configuration of a Gas Expansion Process in a Piston-Type Cylinder with Generalized Convective Heat Transfer Law

Chen

Ma²,

Feng

et al. 2020

Energies

Self Cite

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Optimal configurations for the working fluid expansion process in a piston-type cylinder with maximum work production are studied by applying finite time thermodynamics. The problem is solved by utilizing the modified Lagrangian. The initial and final volumes, initial internal energy and total time are fixed, and the heat transfer between the working fluid and the external heat bath obeys the generalized convective heat transfer law, which can be transformed into Newton’s heat transfer law, the Dulong–Petit heat transfer law and the square convective heat transfer law. The optimal configurations of the expansion process under three different conditions of heat transfer law are provided and compared, respectively. The results show that the heat transfer law has both quantitative and qualitative influences on the optimal configurations of the expansion process.

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Optimal Performance Characteristics of Subcritical Simple Irreversible Organic Rankine Cycle

Cited by 30 publications

References 17 publications

A comparison of using organic Rankine and Kalina cycles as bottom cycles in a solar‐powered steam Rankine cycle

A comparison of using organic Rankine and Kalina cycles as bottom cycles in a solar‐powered steam Rankine cycle

Trigeneration Turbine Units Based on Low Boiling Working Fluids

Optimal Configuration of a Gas Expansion Process in a Piston-Type Cylinder with Generalized Convective Heat Transfer Law

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