Analysis of an integrated solar combined cycle with steam and organic Rankine cycles as bottoming cycles

Shaaban, S.

doi:10.1016/j.enconman.2016.08.075

Cited by 37 publications

(18 citation statements)

References 39 publications

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“…In addition, several authors have studied different ORC-based configurations with different organic fluids. Thus, the R1234ze presented better thermal performance than the other organic fluids in an ORC as a waste heat recovery system from the compressed air line of a Brayton S-CO 2 [ 26 ]. However, the study does not consider an operational optimization of the thermal system involving economic criteria.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

Gutiérrez

Ochoa

Forero

2020

Heliyon

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This paper presents a comparative study on the energy, exergetic and thermo-economic performance of a novelty thermal power system integrated by a supercritical CO 2 Brayton cycle, and a recuperative organic Rankine cycle (RORC) or a simple organic Rankine cycle (SORC). A thermodynamic model was developed applying the mass, energy and exergy balances to all the equipment, allowing to calculate the exergy destruction in the components. In addition, a sensitivity analysis allowed studying the effect of the primary turbine inlet temperature (T IT, P HIGH , r P and T C ) on the net power generated, the thermal and exergy efficiency, and some thermo-economic indicators such as the payback period (PBP), the specific investment cost (SIC), and the levelized cost of energy (LCOE), when cyclohexane, acetone and toluene are used as working fluids in the bottoming organic Rankine cycle. The parametric study results show that cyclohexane is the organic fluid that presents the best thermo-economic performance, and the optimization with the PSO method conclude a 2308.91 USD/kWh in the SIC, 0.22 USD/kWh in the LCOE, and 9.89 year in the PBP for the RORC system. Therefore, to obtain technical and economic viability, and increase the industrial applications of these thermal systems, thermo-economic optimizations must be proposed to obtain lower values of the evaluated performance indicators.

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Section: Introductionmentioning

confidence: 99%

A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

Gutiérrez

Ochoa

Forero

2020

Heliyon

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“…In addition, several novel ORC systems and analysis methods have been proposed by other authors. Shaaban [11] used the ORC to recover the heat of compressed air in the Brayton cycle. The results shown that the R1234ze had a better performance than any other organic fluids.…”

Section: Literaure Reviewmentioning

confidence: 99%

Thermodynamic Investigation of an Integrated Solar Combined Cycle with an ORC System

Wang

2019

Entropy

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An integrated solar combined cycle (ISCC) with a low temperature waste heat recovery system is proposed in this paper. The combined system consists of a conventional natural gas combined cycle, organic Rankine cycle and solar fields. The performance of an organic Rankine cycle subsystem as well as the overall proposed ISCC system are analyzed using organic working fluids. Besides, parameters including the pump discharge pressure, exhaust gas temperature, thermal and exergy efficiencies, unit cost of exergy for product and annual CO2-savings were considered. Results indicate that Rc318 contributes the highest exhaust gas temperature of 71.2℃, while R113 showed the lowest exhaust gas temperature of 65.89 at 800 W/m2, in the proposed ISCC system. The overall plant thermal efficiency increases rapidly with solar radiation, while the exergy efficiency appears to have a downward trend. R227ea had both the largest thermal efficiency of 58.33% and exergy efficiency of 48.09% at 800W/m2. In addition, for the organic Rankine cycle, the exergy destructions of the evaporator, turbine and condenser decreased with increasing solar radiation. The evaporator contributed the largest exergy destruction followed by the turbine, condenser and pump. Besides, according to the economic analysis, R227ea had the lowest production cost of 19.3 $/GJ.

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“…87,88 Brayton cycles efficiency can be improved by combining them with Rankine cycles and reduce the cost of generated electricity. [89][90][91][92] In addition, by combining Brayton cycle with Rankine, lower pressure ratio is required; as a consequence, solar receiver design and operation will be facilitated. 93 Combined Rankine-Brayton cycle uses rejected heat from the Brayton cycle to run a lower temperature Rankine cycle; however, there is increase in capital cost due to requirement of new additional component installation.…”

Section: Brayton-rankinementioning

confidence: 99%

A review on solar‐assisted gas turbines

Ahmadi

Nazari

Ghasempour

et al. 2018

Energy Science & Engineering

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The thermal energy of the sun can be used for electricity generation. Solar thermal energy can be applied with fossil fuels or independently in order to reduce the cost of generated electricity and CO2 emission. Several cycles are introduced to extract solar thermal energy to be used in power plants. Brayton cycles, Rankine‐Brayton cycles, and supercritical Brayton cycles are among the most conventional ones. Based on the reviewed researches, using solar energy in addition to fossil fuels results in lower carbon dioxide emission and lower levelized cost of the generated electricity. Moreover, thermodynamic and economic analyses of the cycles revealed that heat recovery leads to higher efficiency while increase capital cost. The efficiency of solar‐assisted gas turbines depend on various parameters including pressure ratio, turbine inlet temperature, heat absorber geometry and the performance of the components. The enhancement in the efficiency of the cycles by applying each method depends on the configuration, operating condition. For instance, results have shown that 10% increase in turbine efficiency can led to 6%‐12% improvement in the efficiency of a closed‐Brayton cycle.

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Analysis of an integrated solar combined cycle with steam and organic Rankine cycles as bottoming cycles

Cited by 37 publications

References 39 publications

A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

Thermodynamic Investigation of an Integrated Solar Combined Cycle with an ORC System

A review on solar‐assisted gas turbines

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