Investigation of a Solar-Driven Organic Rankine Cycle with Reheating

Bellos, Evangelos; Lykas, Panagiotis; Tzivanidis, Christos

doi:10.3390/app12052322

Cited by 14 publications

(4 citation statements)

References 31 publications

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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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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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“…The specific cost for the solar thermal collectors was taken at (k col = 130 EUR /m 2 ) [56] and the specific cost of the storage tank at (k tank = 500 EUR /m 3 ) [57].…”

Section: Net Present Costmentioning

confidence: 99%

Dynamic Energy Analysis of Different Heat Pump Heating Systems Exploiting Renewable Energy Sources

et al. 2023

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Renewable energy source-fed heat pumps (HPs) may perform up to very high-efficiency standards, offering a promising tool in the wider residential heat decarbonization effort. In this context, this paper investigates different heating configurations utilizing various renewable thermal sources in conjunction with an HP-based system in order to determine the optimal configuration in terms of efficiency, using an existing, fully functioning residential building in Zaragoza, Spain, as our case study, comprising 40 dwellings. Four different HP configurations are investigated:, (i) an air-source system, (ii) a ground-source system, (iii) a dual-source system with solar thermal collectors, and (iv) a triple-source system based on solar, geothermal, and ambient sources. For the purpose of such investigation, detailed dynamic energy simulations are conducted through the use of the INTEMA.building tool (developed in Modelica), applying a multi-objective optimization process that aims at minimizing both the annual electricity consumption and the net present cost. It is demonstrated that the renewable thermally driven HPs are more efficient than the conventional, air-source ones, with the seasonal coefficient of performance increasing by 9.98% (ground source), 4.57% (dual source), and 17.40% (triple source), compared to the air-source heat pump system. Finally, it is revealed (via integrated techno-economic analyses) that the most effective and economical design is the dual source system, while the most expensive is the ground-source configuration. These findings can guide the ongoing design efforts on green residential heat solutions at both research and commercial implementation level.

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“…Operating ORC by solar energy is more cost-effective compared to generating energy by other methods in addition to the ability to store energy in PCM storage. ORC 17 has also been used in gas-cooled nuclear reactors to improve thermal efficiency. ORC is similar to the steam cycle in respect to the working fluid, whereby water is replaced by a high molecular mass liquid with a lower boiling temperature compared to water which makes the characteristics of the ORC liquid favorable for low heat recovery applications below 400°C.…”

Section: Tionmentioning

confidence: 99%

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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Investigation of a Solar-Driven Organic Rankine Cycle with Reheating

Cited by 14 publications

References 31 publications

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

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

Dynamic Energy Analysis of Different Heat Pump Heating Systems Exploiting Renewable Energy Sources

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

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