Effect of the Ratio of Specific Heats on a Small Scale Solar Brayton Cycle

Riazi, Hamed; Ahmed, Noor A.

doi:10.1016/j.proeng.2012.10.136

Cited by 16 publications

(6 citation statements)

References 30 publications

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“…By comparing and considering three different gases, Riazi and Ahmed [28] presented an analysis on the effect of the ratio of specific heats ( k ) of a closed regenerative solar Brayton cycle. They found that a fluid with a high ratio of specific heats, for example air ( k = 1.4), has peak efficiencies at lower compressor pressure ratios while a fluid with a low ratio of specific heats, for example CF 4 (k = 1.14), has peak efficiencies at higher compressor pressure ratios.…”

Section: Optimisation Results and Influencing Factorsmentioning

confidence: 99%

A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle

Roux

Bello‐Ochende

Meyer

2013

Renewable and Sustainable Energy Reviews

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Many studies have been published on the performance and optimisation of the Brayton cycle and solar thermal Brayton cycle showing the potential, merits and challenges of this technology. Solar thermal Brayton systems have potential to be used as power plants in many sun-drenched countries. It can be very competitive in terms of efficiency, cost and environmental impact. When designing a system such as a recuperative Brayton cycle there is always a compromise between allowing effective heat transfer and keeping pressure losses in components small. The high temperatures required in especially the receiver of the system presents a challenge in terms of irreversibilities due to heat loss. In this paper, the authors recommend the use of the total entropy generation minimisation method. This method can be applied for the modelling of a system and can serve as validation when compared with first-law modelling. The authors review various modelling perspectives required to develop an objective function for solar thermal power optimisation, including modelling of the sun as an exergy source, the Gouy-Stodola theorem and turbine modelling.With recommendations, the authors of this paper wish to clarify and simplify the optimisation and modelling of the solar thermal Brayton cycle for future work. The work is applicable to solar thermal studies in general but focuses on the small-scale recuperated solar thermal Brayton cycle.2

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Section: Optimisation Results and Influencing Factorsmentioning

confidence: 99%

A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle

Roux

Bello‐Ochende

Meyer

2013

Renewable and Sustainable Energy Reviews

View full text Add to dashboard Cite

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“…The main function of the recuperator is to preheat the incoming air which is normally cold before pass into the heat source. The power required by the compressor can be calculated using the following equation [30]:…”

Section: -Brayton Cyclementioning

confidence: 99%

“…The efficiency of the thermal Brayton cycle ( ) is: Equation 10 can also be written in terms of pressure ratio, turbine efficiency, compressor efficiency, recuperator effectiveness and temperatures to be as following [30]:…”

Section: -Brayton Cyclementioning

confidence: 99%

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Numerical analysis of small scale axial and radial turbines for solar powered Brayton cycle application

Daabo

Mahmoud

Al-Dadah

et al. 2017

Applied Thermal Engineering

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“…[5]. Riazi and Ahmed [6] studied the effect of specific heat ratios for three different working fluids and for air, helium and tetrafluoromethane, on the efficiency of small scale solar energy. A regenerative closed Brayton cycle was analysed in terms of the influence of temperature ratio and the minimum to maximum gas temperature.…”

Section: -Introductionmentioning

confidence: 99%

Development of three-dimensional optimization of a small-scale radial turbine for solar powered Brayton cycle application

Daabo

Jubori

Mahmoud

et al. 2017

Applied Thermal Engineering

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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Effect of the Ratio of Specific Heats on a Small Scale Solar Brayton Cycle

Cited by 16 publications

References 30 publications

A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle

A review on the thermodynamic optimisation and modelling of the solar thermal Brayton cycle

Numerical analysis of small scale axial and radial turbines for solar powered Brayton cycle application

Development of three-dimensional optimization of a small-scale radial turbine for solar powered Brayton cycle application

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