Multi-objective optimization of a solar-driven polygeneration system based on CO2 working fluid

Georgousis, Nikolaos; Lykas, Panagiotis; Bellos, Evangelos; Tzivanidis, Christos

doi:10.1016/j.enconman.2021.115136

Cited by 28 publications

(5 citation statements)

References 44 publications

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“…An ORC driven by flat plate solar collectors tested by Pinerez et al 20 gives a maximum efficiency of 14.6%. Tzivanidis et al 21 used ORC with equivalent solar collectors and they concluded that an investment payback period is close to nine years and the annual system efficiency is 15.1%, these results agree with the experimental data of Georgousis et al 22 Guangli et al 23 have tested a two-stage ORC that is being proposed for the recovery and utilization of low-grade heat from single flash geothermal power plant exhaust flue fluids using working fluids R227ea and R116. The results show that [24][25][26][27][28][29] the thermal efficiency and amount of electricity produced by a solar ORC system can be increased by lowering the condensing temperature.that work with different solar collectors.…”

Section: Tionsupporting

confidence: 55%

Experimental and Theoretical Study to Increase the Solar-Organic Rankin Cycle Efficiency

Alshahrany¹,

Hassan²

2023

Yanbu Journal of Engineering and Science

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Under conditions of high climate temperature and environmental pollution, scientists are turning to the use of new and renewable energy. The solar Organic Rankin Cycle (ORC) is greatest technology for converting low or medium-temperature energy sources into electricity. For the purpose of generating steam from solar energy to power the organic Rankin cycle a system consists of solar pond, flat plate collector and parabolic dish was designed, implemented, and tested to use in organic Rankin cycle (ORC). The novelty in the present work is the use of the solar pond as storage of heat that does not lose because the salinity gradient middle layer in the pond does not allow heat to pass through it, as well as the use of reheating to enhance the thermodynamic efficiency. Also, an analytical model has been made to enhance the output power and efficiency of the solar thermal ORC according to some organic control criteria. A Cycle of solar thermal power plants (ORC) is simulated with four refrigerants, R144a, R123, R124 and R245fa of working fluid’s performance. The cycle net-specific work can be verified at the highest efficiency as a function of turbine extraction numbers, over-temperature, and evaporation temperature. Superheated steam was obtained at a temperature of 327 °C to be used in the Rankin cycle of the solar energy system which is generated in this work. The maximum output power improvement is 9% when using the working fluid R123 for R124, 5.5% for R245fa, and approximately 2.8 for R144a. And the thermal efficiency of ORC is higher with R123 compared to 144a by about 2.2%. Furthermore, it also concluded that both inlet and outlet temperatures of a turbine are very important factors that affect the operational performance of organic Rankin cycle power generation systems.

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Section: Tionsupporting

confidence: 55%

Experimental and Theoretical Study to Increase the Solar-Organic Rankin Cycle Efficiency

Alshahrany¹,

Hassan²

2023

Yanbu Journal of Engineering and Science

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“…An assumption of this work is the selection of the solar field area at 300 m 2 and the storage tank at 5 m 3 . Moreover, It is critical to say that the thermodynamic model for simple ORC has been validated in our previous works [28]. However, it is important to again provide validation evidence in order to be clear about the accuracy of the developed model.…”

Section: Simulation Of the Developed Modelsmentioning

confidence: 99%

Investigation of a Solar-Driven Organic Rankine Cycle with Reheating

2022

Self Cite

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The purpose of this simulation study is the examination of a solar-driven power cycle that is driven by collectors with evacuated tubes. The power cycle is an organic Rankine cycle (ORC) that works with cyclopentane. The novelty of the cycle is the use of reheating in order to enhance its thermodynamic efficiency, while the cycle also has a recuperator. Moreover, the cycle is compared with the conventional ORC in order to determine the performance enhancement with the examined idea. The analysis is done with a developed program in Engineering Equation Solver and both in steady-state and transient conditions for a typical year. The analysis was conducted in terms of energy and economic performance. According to an optimization procedure for maximizing the net present values of the investment, it is found that the novel design leads to a net present value of 68 k€, a simple payback of 10 years, and a yearly energy efficiency of 7.0%, while the respective values for the conventional ORC are 44 k€, 10.8 years, and 5.1% for its optimal design according to the net present values maximization. Thus, it is obvious that the suggested design increases both energy and financial performance, compared to the usual design.

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“…The solar system is designed based on the location of Jazan city, KSA, and all-weather information of the temperatures. And to obtain the highest thermal energy, the values of the temperature between 150 o C to 240 o C were used from 8 am to 17 pm, and the working hours vary according to the year seasons [57][58][59][60][61][62][63][64][65][66][67]. According to the results of some researchers [18,34,58,[68][69][70][71][72], at an air temperature of 35, the system gives a heat concentration of up to 403 degrees Celsius, produced by one equivalent dish, equivalent to 4576 watts.…”

Section: Components and Alternative Of Orc Working Fluidsmentioning

confidence: 99%

Optimal Organic Working Fluid for the Rankine Cycle Operating by Parabolic Trough Solar Collector

Hassan

2024

Preprint

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This paper investigates finding the best working fluid to improve the giving of the solar organic Rankine cycle. A parabolic trough solar complex was designed to focus the sun rays on a vicious cylinder to produce sufficient steam to operate the ORC. The steam is collected in an isolated tank filled with molten salt called an evaporator. The heat gained in this evaporator is transferred to feed the power generation turbine. Ten different working fluids of R123, R143a, R433A, R290, R40, R22, R600a, R601, RC318 and R1270 were tested at a boiling temperature from 150°C to 240°C. The results showed that using R601 as a working fluid for ORC gave the highest thermal efficiency compared to other organic liquids tested at temperatures from 150 to 240 °C. R601 gives a gain in cycle thermal efficiency by about 24.6% relative using R600a. While R 290 gave an improvement in the power produced by the turbine estimated at 10% higher than that used at higher temperatures above 240° C.

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Multi-objective optimization of a solar-driven polygeneration system based on CO2 working fluid

Cited by 28 publications

References 44 publications

Experimental and Theoretical Study to Increase the Solar-Organic Rankin Cycle Efficiency

Experimental and Theoretical Study to Increase the Solar-Organic Rankin Cycle Efficiency

Investigation of a Solar-Driven Organic Rankine Cycle with Reheating

Optimal Organic Working Fluid for the Rankine Cycle Operating by Parabolic Trough Solar Collector

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