Exergoeconomic analysis of zeotropic mixture on the new proposed organic Rankine cycle for energy production from geothermal resources

Samadi, Fereshteh; Kazemi, Neda

doi:10.1016/j.renene.2020.01.038

Cited by 22 publications

(5 citation statements)

References 30 publications

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“…To this purpose, the energy content of the organic fluid at the exit of the turbine is exploited (4-4*) to preheat the liquid before the entrance in the evaporator (2-2*). Specifically, centrifugal pumps, radial turbine and shell and tube heat exchangers were selected, according to the literature [19,[88][89][90]. Figure 2b The performances of the geothermal-driven ORC were characterised by adopting a thermodynamic model developed by the authors in the last years [16,29,91].…”

Section: Organic Rankine Cycle (Orc) Unitmentioning

confidence: 99%

“…where p j is the operating pressure. The coefficients b 1,j , b 2,j , c 1,j , c 2,j , c 3,j and the material factors F M,j are shown in Table 2 [19,[88][89][90].…”

Section: Economic Analysismentioning

confidence: 99%

“…where the corresponding bare module factor F BM is in Table 2 [19,[88][89][90]. Finally, the total cost (in euro) of the integrated geothermal system was calculated according to the following equation:…”

Section: Economic Analysismentioning

confidence: 99%

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Integrated Geothermal Energy Systems for Small-Scale Combined Heat and Power Production: Energy and Economic Investigation

Morrone

Algieri

2020

Applied Sciences

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In recent years, an increasing interest in geothermal energy has been registered in both the scientific community and industry. The present work aims to analyse the energy performance and the economic viability of an innovative high-efficiency geothermal-driven integrated system for a combined heat and power (CHP) application. The system consists of a heat exchanger (HEX) and a transcritical organic Rankine cycle (ORC) that work in parallel to exploit a high-temperature geothermal source (230 °C) and satisfy the energy demand of a commercial centre located in Southern Italy. The ORC and HEX sub-units can operate at partial load to increase the system flexibility and to properly react to continuous changes in energy request. A lumped model was developed to find the proper operating conditions and to evaluate the energy production on an hourly basis over the whole year. In particular, a multi-variable optimisation was implemented to find the most suitable configuration and a 101.4 kWel ORC was selected while the HEX nominal power was 249.5 kWth. The economic viability of the integrated system was evaluated in terms of net present value and payback period and different operating strategies were compared: thermal-driven, electric-driven, and a mixed strategy. The latter turned out to be the best solution according to both energy and economic criteria, with electric and thermal self-consumptions larger than 90%, with no heat dumping and a payback time close to five years.

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Section: Organic Rankine Cycle (Orc) Unitmentioning

confidence: 99%

“…where p j is the operating pressure. The coefficients b 1,j , b 2,j , c 1,j , c 2,j , c 3,j and the material factors F M,j are shown in Table 2 [19,[88][89][90].…”

Section: Economic Analysismentioning

confidence: 99%

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Integrated Geothermal Energy Systems for Small-Scale Combined Heat and Power Production: Energy and Economic Investigation

Morrone

Algieri

2020

Applied Sciences

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“…The highest exergy efficiency of 41% was obtained using R600a, which was 9.4% higher when compared with a single-stage cycle. Kazemi and Samadi [112], and Samadi and Kazemi [113] proposed an ORC as shown in Figure 11, using isobutane, R123, and isobutane/isopentane. The maximum energy and exergy efficiencies were obtained using R123, achieving values of 15.31% and 54.25%, respectively.…”

Section: Two-stage Orcmentioning

confidence: 99%

A Comprehensive Review of Organic Rankine Cycles

et al. 2023

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It has been demonstrated that energy systems driven by conventional energy sources like fossil fuels are one of the main causes of climate change. Organic Rankine cycles can help to reduce that impact, as they can be operated by using the industrial waste heat of renewable energies. The present study presents a comprehensive bibliographic review of organic Rankine cycles. The study not only actualizes previous reviews that mainly focused on basic cycles operating on subcritical or supercritical conditions, but also includes the analysis of novel cycles such as two-stage and hybrid cycles and the used fluids. Recuperative and regenerative cycles are more efficient than reheated and basic single-stage cycles. The use of two-stage cycles makes it possible to achieve higher thermal efficiencies and net power outputs of up to 20% and 44%, respectively, compared with those obtained with single-stage cycles. Theoretical studies show that hybrid systems, including Brayton and organic Rankine cycles, are the most efficient; however, they require very high temperatures to operate. Most organic Rankine cycle plants produce net power outputs from 1 kW up to several tens of kW, mainly using microturbines and plate heat exchangers.

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“…Their considered system was an ORC as an upstream cycle, and an absorption chiller as a downstream cycle. Samadi and Kazemi [20] studied a new combined ORC and geothermal cycle with a zeotropic working fluid exergoeconomically. They also optimized the operating parameters of the cycle, and found that increasing the isobutane mole fraction in the isobutane/isopentane mixture causes a reduction in economic return on investment.…”

Section: Introductionmentioning

confidence: 99%

Energy, Exergy, Exergoeconomic and Exergoenvironmental Impact Analyses and Optimization of Various Geothermal Power Cycle Configurations

Shamoushaki

Ehyaei

Rosen

2021

Entropy

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Energy, exergy, and exergoeconomic evaluations of various geothermal configurations are reported. The main operational and economic parameters of the cycles are evaluated and compared. Multi-objective optimization of the cycles is conducted using the artificial bee colony algorithm. A sensitivity assessment is carried out on the effect of production well temperature variation on system performance from energy and economic perspectives. The results show that the flash-binary cycle has the highest thermal and exergy efficiencies, at 15.6% and 64.3%, respectively. The highest generated power cost and pay-back period are attributable to the simple organic Rankine cycle (ORC). Raising the well-temperature can increase the exergy destruction rate in all configurations. However, the electricity cost and pay-back period decrease. Based on the results, in all cases, the exergoenvironmental impact improvement factor decreases, and the temperature rises. The exergy destruction ratio and efficiency of all components for each configuration are calculated and compared. It is found that, at the optimum state, the exergy efficiencies of the simple organic Rankine cycle, single flash, double flash, and flash-binary cycles respectively are 14.7%, 14.4%, 12.6%, and 14.1% higher than their relevant base cases, while the pay-back periods are 10.6%, 1.5% 1.4%, and 0.6% lower than the base cases.

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Exergoeconomic analysis of zeotropic mixture on the new proposed organic Rankine cycle for energy production from geothermal resources

Cited by 22 publications

References 30 publications

Integrated Geothermal Energy Systems for Small-Scale Combined Heat and Power Production: Energy and Economic Investigation

Integrated Geothermal Energy Systems for Small-Scale Combined Heat and Power Production: Energy and Economic Investigation

A Comprehensive Review of Organic Rankine Cycles

Energy, Exergy, Exergoeconomic and Exergoenvironmental Impact Analyses and Optimization of Various Geothermal Power Cycle Configurations

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