An investigation on organic Rankine cycle incorporating a ground-cooled condenser: Working fluid selection and regeneration

Mahmoud, Montaser; Alkhedher, Mohammad; Ramadan, Mohamad; Naher, Sumsun; Pullen, Keith

doi:10.1016/j.energy.2022.123742

Cited by 22 publications

(6 citation statements)

References 40 publications

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“…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. And according to the estimate of the energy required for this work, it requires the installation of 8 solar collectors.…”

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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“…Energy efficiency for the overall system can be calculated by ratio net power from ORC and the capacity of the evaporator to the total heat entering the overall 27 :…”

Section: Modelsmentioning

confidence: 99%

“…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: Introductionmentioning

confidence: 99%

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

Alshahrany

Hassan

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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“…It was reported in Ref. [38] that the ground-cooled condenser can enhance the net output power of the cycle by 7.35%, 12.13% and 8.77% for R123, R124 and R245fa, respectively at an expander inlet pressure of 3 MPa.…”

mentioning

confidence: 95%

“…One of the latest developments of GE systems is the use of a ground-cooled condenser as shown in Figure 1 [37,38]. This has shown a great potential to use shallow geothermal energy for cooling power cycles and especially in case of low-grade energy sources.…”

mentioning

confidence: 99%

Experimental investigation into the potential of using a shallow ground-cooled condenser in Lebanon

Mahmoud

Alkhedher

Ramadan

et al. 2022

Energy Conversion and Management

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An investigation on organic Rankine cycle incorporating a ground-cooled condenser: Working fluid selection and regeneration

Cited by 22 publications

References 40 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

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

Experimental investigation into the potential of using a shallow ground-cooled condenser in Lebanon

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