Exergy analysis of an integrated solar combined cycle system

Baghernejad, A.; Yaghoubi, M.

doi:10.1016/j.renene.2010.02.021

Cited by 141 publications

(57 citation statements)

References 10 publications

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“…The PTC model results were validated against the experimental result for exergy delivered and exergy loss as shown in Table 2 [22]. This validation showed good agreement and the values compared had a maximum difference of 3.03% for receiver exergy loss.…”

Section: Parabolic Trough Collector (Ptc)mentioning

confidence: 91%

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Exergetic Analysis of an Integrated Tri-Generation Organic Rankine Cycle

Mathkor

Agnew

Al-Weshahi³

et al. 2015

Energies

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This paper reports on a study of the modelling, validation and analysis of an integrated 1 MW (electrical output) tri-generation system energized by solar energy. The impact of local climatic conditions in the Mediterranean region on the system performance was considered. The output of the system that comprised a parabolic trough collector (PTC), an organic Rankine cycle (ORC), single-effect desalination (SED), and single effect LiBr-H2O absorption chiller (ACH) was electrical power, distilled water, and refrigerant load. The electrical power was produced by the ORC which used cyclopentane as working fluid and Therminol VP-1 was specified as the heat transfer oil (HTO) in the collectors with thermal storage. The absorption chiller and the desalination unit were utilize the waste heat exiting from the steam turbine in the ORC to provide the necessary cooling energy and drinking water respectively. The modelling, which includes an exergetic analysis, focuses on the performance of the solar tri-generation system. The simulation results of the tri-generation system and its subsystems were produced using IPSEpro software and were validated against experimental data which showed good agreement. The tri-generation system was able to produce about 194 Ton of refrigeration, and 234 t/day distilled water.

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Section: Parabolic Trough Collector (Ptc)mentioning

confidence: 91%

“…An aperture (W0) of 5 m and a length (L) of 49 m were the design parameters used for each collector. It is assumed that the fluid enters the collector at a temperature of 298 °C and a mass flow rate of 218 kg/s [22]. The outlet collector fluid temperature was found to be 337 °C.…”

Section: Thermal Analysismentioning

confidence: 99%

Exergetic Analysis of an Integrated Tri-Generation Organic Rankine Cycle

Mathkor

Agnew

Al-Weshahi³

et al. 2015

Energies

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“…Regarding the exergy efficiency, there are a couple of commonly accepted definitions in previous research that have been summarized [21]. In this paper, the exergy efficiency is defined as the ratio of the exergy obtained by the energy consumed to achieve the desired output.…”

Section: Methodsmentioning

confidence: 99%

Exergetic and Parametric Study of a Solar Aided Coal-Fired Power Plant

Zhai

Zhu

Yang

et al. 2013

Entropy

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Abstract:A solar-aided coal-fired power plant realizes the integration of a fossil fuel (coal or gas) and clean energy (solar). In this paper, a conventional 600 MW coal-fired power plant and a 600 MW solar-aided coal-fired power plant have been taken as the study case to understand the merits of solar-aided power generation (SAPG) technology. The plants in the case study have been analyzed by using the First and Second Laws of Thermodynamics principles. The solar irradiation and load ratio have been considered in the analysis. We conclude that if the solar irradiation was 925 W/m 2 and load ratio of the SAPG plant was 100%, the exergy efficiency would be 44.54% and the energy efficiency of the plant (46.35%). It was found that in the SAPG plant the largest exergy loss was from the boiler, which accounted for about 76.74% of the total loss. When the load ratio of the unit remains at 100%, and the solar irradiation varies from 500 W/m 2 to 1,100 W/m 2 , the coal savings would be in the range of 8.6 g/kWh to 15.8 g/kWh. If the solar irradiation were kept at 925 W/m 2 while the load ratio of the plant changed from 30% to 100%, the coal savings could be in the range of 11.99 g/kWh to 13.75 g/kWh.Keywords: solar-aided coal-fired power plant; exergy; efficiency; solar energy

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“…Baghernejad et al, [12] and Al-Sulaiman [13] estimated and analyzed the energy and exergy destruction of an ISCC plant and demonstrated that around 71-73% of the destroyed exergy (i.e. waste heat) occurs in the solar collectors.…”

Section: Literature Reviewmentioning

confidence: 99%

Integrated Solar Combined Cycle Power Plants: Paving the way for thermal solar

Alqahtani

Patiño‐Echeverri

2016

Applied Energy

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Integrated Solar Combined Cycle Power Plants (ISCCs), composed of a Concentrated Solar Power (CSP) plant and a Natural Gas-fired Combined Cycle (NGCC) power plant, have been recently introduced in the power generation sector as a technology with the potential to simultaneously reduce fossil fuel usage and the integration costs of solar power. This study quantifies the economic benefits of an ISCC power plant relative to a stand-alone CSP with energy storage, and a NGCC plant. A combination of tools is used to estimate the levelized cost of electricity (LCOE) and the cost of carbon abatement (CoA) for CSP, NGCC and ISCC technologies under different natural gas prices, and at several locations experiencing different ambient temperatures and solar resources. Results show that an ISCC with up to 10-15% of nameplate capacity from solar energy can be cost effective as a dispatchable electricity generation resource.Integrating the CSP into an ISCC reduces the LCOE of solar-generated electricity by 35-40% relative to a stand-alone CSP plant, and provides the additional benefit of dispatchability. An ISCC also outperforms a CSP with energy storage in terms of LCOE and CoA. The current LCOE of an ISCC is lower than that of a stand-alone NGCC when fuel price reaches 13.5 $/MMBtu, while its CoA is lower at a fuel price of 8.5 $/MMBtu.Although, under low to moderate natural gas price conditions an NGCC generates electricity and abates carbon emissions at a lower cost than an ISCC; small changes in v the capacity factor of an ISCC relative to the NGCC, or capital cost reductions for the CSP component have great impact tilting the balance in the ISCC's favor.

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Exergy analysis of an integrated solar combined cycle system

Cited by 141 publications

References 10 publications

Exergetic Analysis of an Integrated Tri-Generation Organic Rankine Cycle

Exergetic Analysis of an Integrated Tri-Generation Organic Rankine Cycle

Exergetic and Parametric Study of a Solar Aided Coal-Fired Power Plant

Integrated Solar Combined Cycle Power Plants: Paving the way for thermal solar

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