Performance analysis of combined Brayton and inverse Brayton cycles and developed configurations

Alabdoadaim, Mohamed; Agnew, Brian; Potts, Ian

doi:10.1016/j.applthermaleng.2006.01.003

Cited by 40 publications

(18 citation statements)

References 4 publications

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“…A thermodynamic model for combined regenerative Brayton and inverse Brayton cycles is established in this paper by considering the pressure drops of the working fluid along the flow processes using thermodynamic optimization theory based on the first law analysis of [42]. The analytical formulae for the relations between power output, thermal efficiency, and the compressor pressure ratio of the top cycle are derived.…”

Section: Resultsmentioning

confidence: 99%

“…The system proposed in [42] is shown in Figure 1. It is constructed from a top cycle (regenerative Brayton cycle) and a bottom cycle (inverse Brayton cycle).…”

Section: Physical Modelmentioning

confidence: 99%

“…The exergy analysis and optimization of the combined Brayton and inverse Brayton cycles were performed by Zhang et al [39]. Based on the combined Brayton and inverse Brayton cycles, Alabdoadaim et al [40][41][42] proposed its developed configurations including regenerative cycle and reheat cycle, and using two parallel inverse Brayton cycles as bottom cycles. They found that the system with regeneration attains higher heat efficiency than that of the base system, but with smaller work output based on the first law analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, they studied the performance of the combined Brayton and two parallel inverse Brayton cycles [45,46]. A further step of this paper beyond [37,42,[44][45][46] is to analyze and optimize the performance of the combined regenerative Brayton and inverse Brayton cycles proposed in [42] with consideration of the pressure drops and the size constraints by using similar principles and methods as used in [25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Modeling for Open Combined Regenerative Brayton and Inverse Brayton Cycles with Regeneration before the Inverse Cycle

Chen

Zhang

Sun

2012

Entropy

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A thermodynamic model of an open combined regenerative Brayton and inverse Brayton cycles with regeneration before the inverse cycle is established in this paper by using thermodynamic optimization theory. The flow processes of the working fluid with the pressure drops and the size constraint of the real power plant are modeled. There are 13 flow resistances encountered by the working fluid stream for the cycle model. Four of these, the friction through the blades and vanes of the compressors and the turbines, are related to the isentropic efficiencies. The remaining nine flow resistances are always present because of the changes in flow cross-section at the compressor inlet of the top cycle, regenerator inlet and outlet, combustion chamber inlet and outlet, turbine outlet of the top cycle, turbine outlet of the bottom cycle, heat exchanger inlet, and compressor inlet of the bottom cycle. These resistances associated with the flow through various cross-sectional areas are derived as functions of the compressor inlet relative pressure drop of the top cycle, and control the air flow rate, the net power output and the thermal efficiency. The analytical formulae about the power output, efficiency and other coefficients are derived with 13 pressure drop losses. It is found that the combined cycle with regenerator can reach higher thermal efficiency but smaller power output than those of the base combined cycle at small compressor inlet relative pressure drop of the top cycle.

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Section: Resultsmentioning

confidence: 99%

“…The system proposed in [42] is shown in Figure 1. It is constructed from a top cycle (regenerative Brayton cycle) and a bottom cycle (inverse Brayton cycle).…”

Section: Physical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermodynamic Modeling for Open Combined Regenerative Brayton and Inverse Brayton Cycles with Regeneration before the Inverse Cycle

Chen

Zhang

Sun

2012

Entropy

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“…Specific cycle deigns have been discussed by Dincer et al [5] and Tuo [6] for reheat cycles, by le Roux et al [7] for integrated solar BCs, and by Kribus et al [8] for combined cycles (BC combined with RCs). Later, the combined cycles have also been proposed and analyzed by many other groups [9,10], and it is identified to have the potential for high performance with low installed cost. Those results revealed that the hybrid system is superior to the simple gas turbine cycle over the whole chosen range of cycle pressure ratios (PRs).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of representative power generation cycles for low-to-medium temperature applications

Chen

Zhao

et al. 2014

Int. J. Energy Res.

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SUMMARY This study is focused on the analysis of representative thermodynamic cycles for power generation at low‐to‐medium temperatures (with the highest cycle temperature from 450 to 700 K). The natural working fluid of carbon dioxide is selected for the current tests and comparisons with suitable operation ranges. Energy balance and exergy loss models are established and applied to 10 selected representative thermodynamic cycles. One modified efficiency parameter is also defined for better comparison of performances, which has considered the effects of both specific thermodynamic process and cycle complexity. Based on the modified efficiency parameter, it is found that Rankine cycle yields the highest performance at 450–500 K among the 10 representative cycles, while regenerative Brayton cycle shows better behavior for 550–700 K. Detailed behaviors and optimal principals of regenerative Brayton cycles are also identified and compared in this study. Also, a new cycle is also proposed in this study, which combines the advantages of Rankine cycle and Brayton cycle. The new cycle is proved to have better work output potential but higher system complexity factor. In addition, based on the thermodynamic analysis, possible future directions of low‐to‐medium temperature power cycles are summarized. It is hoped that the results can be of help for related power generation system designs. Copyright © 2014 John Wiley & Sons, Ltd.

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Thermal Design and Optimization of Power Cycles

Patel

Savsani

Tawhid

2019

Thermal System Optimization

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Performance analysis of combined Brayton and inverse Brayton cycles and developed configurations

Cited by 40 publications

References 4 publications

Thermodynamic Modeling for Open Combined Regenerative Brayton and Inverse Brayton Cycles with Regeneration before the Inverse Cycle

Thermodynamic Modeling for Open Combined Regenerative Brayton and Inverse Brayton Cycles with Regeneration before the Inverse Cycle

Thermodynamic analysis of representative power generation cycles for low-to-medium temperature applications

Thermal Design and Optimization of Power Cycles

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