Concurrent optimization and 4E analysis of organic Rankine cycle power plant driven by parabolic trough collector for low-solar radiation zone

Arslan, Oğuz; Kılıç, Damla Çoksert

doi:10.1016/j.seta.2021.101230

Cited by 23 publications

(6 citation statements)

References 48 publications

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“…[7][8][9][10] On the basis of dynamic conditions in low solar radiation zone (with radiation intensity lower than 400W/m 2 ), the maximum energy efficiency of the PTSCbased ORC system was 11.05%. 11 Utilization of R245fa/ R500 pair as the working fluid of PTSC-based cascaded ORCs resulted in a higher energy efficiency of 12.76%. 12 The Kalina cycle system (KCS) is a practical bottoming cycle that augments the energy conversion efficiency of hybrid systems.…”

Section: Introductionmentioning

confidence: 99%

Energetic/exergetic study of Kalina and refrigeration bottoming cycles on different solar‐driven organic Rankine cycles

Dehghan,

Akbari,

Montazerin

et al. 2024

Energy Science & Engineering

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Combination of different power cycle scenarios is of prime importance in achieving maximum energy utilization from solar‐driven multigeneration systems. To fulfill such objective, the present article proposes a novel energy distribution system, leveraging a combination of direct‐fed organic Rankine cycle (ORC) and a bottom‐cycled arrangement of Kalina cycle system (KCS) and double‐effect absorption refrigeration cycle (DEARC) within a parabolic trough solar collector powered trigeneration system. The study explores three different ORC configurations: simple ORC; ORC equipped with internal heat exchanger (ORC‐IHE) and regenerative ORC (RORC). It is shown that although higher efficiencies are achievable from a larger portion of PTSC energy absorbed by the ORC, the ORC energy absorption is limited by ORC evaporator temperature differences, and there is unused energy that can be recovered by the KCS, based on the proposed energy system. The results indicate that the addition of bottoming KCS leads to a considerable increase in the exergy efficiency of ORC, ORC‐IHE and RORC‐based systems by 11.7%, 30.7% and 32.6%, respectively. The impact of different ORC configurations, key ORC parameters and various organic working fluids on the energetic/exergetic efficiencies is also examined to find the optimal configuration. In terms of overall energetic/exergetic efficiencies, the highest performance belongs to ORC (78.4%/30.4%) while the lowest energetic and exergetic efficiencies belong to ORC‐IHE and RORC, respectively (56.3% and 25.65%). On the basis of a comparative study with the available literature, these values are higher than what is already reported for similar solar‐driven multigeneration systems. Appropriate thermal match and lower exergy destruction in the KCS, and bottoming cycle arrangement of the DEARC are the main reasons for such enhanced performance. This research not only contributes valuable insights into efficient solar‐driven systems but also sets a new benchmark for performance metrics in the existing literature.

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Section: Introductionmentioning

confidence: 99%

Energetic/exergetic study of Kalina and refrigeration bottoming cycles on different solar‐driven organic Rankine cycles

Dehghan,

Akbari,

Montazerin

et al. 2024

Energy Science & Engineering

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“…It can result in more than (10%) more increased solar exergy. Arslan et al 25 investigated the lower solar region in the Rankine loop. they assessed several parameters such as R600a, toluene, and cyclopentane.…”

Section: Introductionmentioning

confidence: 99%

A novel dual feedwater circuit for a parabolic trough solar power plant

Al-Maliki

Alsaedi

Khafaji

et al. 2023

Sci Rep

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The validated dynamic model of a parabolic trough power plant (PTPP) is improved by the combination of a new feedwater circuit (feedwater/HTF circuit) and a reference feedwater circuit (feedwater/steam circuit) as well as the development of the steam turbine model. Such design represents the first effort of research to utilize a dual feedwater circuit inside the PTPP to increase the power output in the daylight from 50 to 68 MWel and raise night operating hours at a lower cost. The purpose of increasing the operating night hours at a power (48 MWel) as in the reference PTPP is to get rid of the fossil fuel backup system and rely only on the absorbed solar energy and the stored energy in the molten salt. During daylight hours, the feedwater circuit is operated using Feedwater/HTF. In the transient period, the feedwater/HTF circuit will gradually be closed due to a decrease in solar radiation. Furthermore, the rest of the nominal feedwater mass flow rate (49 kg/s) is gradually replenished from the feedwater/steam circuit. After sunset, the entirety of the feedwater is heated based on the steam extracted from the turbine. The purpose of this improvement is to raise the number of nightly operational hours by reducing the nominal load from 61.93 to 48 MWel as a result of low energy demand during the evening hours. Therefore, a comparison study between the reference model and this optimization (optimization 2) is conducted for clear days (26th–27th/June and 13th–14th/July 2010) in order to understand the influence of dual feedwater circuit. The comparison indicates that the operational hours of the power block (PB) will be obviously increased. Moreover, this improvement reduces based on the fossil fuel system at night. As the last step, an economic analysis was performed on the costs of the referenced and the optimized PTPP as a function of the levelized energy cost (LEC). The results illustrate that the specific energy cost of a PTPP with 7.5 h of storage capacity is lowered by about 14.5% by increasing the output of the PTPP from 50 to 68 MWel.

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“…Because of the sensitivity of the DAPTC performance to the aforementioned variables, determining its best performance without advanced optimization techniques can be difficult 18 . Furthermore, applying these optimization techniques will result in lower greenhouse gas emissions and lower cost of energy 19 …”

Section: Introductionmentioning

confidence: 99%

“…18 Furthermore, applying these optimization techniques will result in lower greenhouse gas emissions and lower cost of energy. 19 Energy and exergy analysis of PTC has been done by Ehyaei et al 20 The maximum performance of PTC and the minimum cost of heat production were determined by the multi-objective swarm optimization algorithm. According to the results, the optimum estimates were 29.22%, 35.55%, and 0.0142 $/kWh for exergy efficiency, energy efficiency, and heat cost, respectively.…”

Section: Introductionmentioning

confidence: 99%

Multi‐objective assessment of a DAPTC based on 4E analysis: Water‐energy‐environment nexus

Saray

Heyhat

2022

Intl J of Energy Research

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Summary This study aims to thermodynamic analysis and optimizes the performance of a nanofluid‐based direct absorption parabolic trough collector (DAPTC) using a non‐dominated sorting genetic algorithm (NSGA‐II). For this purpose, silicon carbide (SiC) and copper oxide (CuO) at three different volume fractions (0.01%, 0.05%, and 0.1%) are used as the nanoparticles and water as the base fluid. The results obtained using the method presented in the current study are verified through experimental results, which are in good agreement with those. A comprehensive analysis is conducted to determine the effect of operating conditions and geometric dimensions on the energy and exergy efficiencies and economic performance of the DAPTC. In addition, an environmental investigation is performed to determine the effect of using nanofluids on CO2, NOx, and SOx reduction. Under the operating conditions, the cost of energy production, when SiC/water and CuO/water nanofluids are utilized instead of the base fluid, is reduced by 31.08% and 47.92%, respectively. The use of SiC/water and CuO/water nanofluids can reduce CO2 emissions by 216.18 and 332.55 kg and also water consumption by 968.1 and 1489.1 m3, respectively. The optimum energy and exergy efficiencies are 65.53% and 38.97%, respectively. Also, the SiC/water and CuO/water nanofluids have a 35% and 67.35% environmental impact, respectively. Highlights Multi‐objective optimization of a DAPTC using the NSGA‐II algorithm. The energy, exergy, economic, and environment of solar collectors were analyzed. The 547.86 MJ energy and 1489.1 m3 water were saved by the exploitation of CuO/water nanofluid. The 316.15 MJ energy and 968.1 m3 water were saved by the exploitation of SiC/water nanofluid. CO2 emissions decreased by 332.55 and 216.18 kg using CuO/water and SiC/water.

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Concurrent optimization and 4E analysis of organic Rankine cycle power plant driven by parabolic trough collector for low-solar radiation zone

Cited by 23 publications

References 48 publications

Energetic/exergetic study of Kalina and refrigeration bottoming cycles on different solar‐driven organic Rankine cycles

Energetic/exergetic study of Kalina and refrigeration bottoming cycles on different solar‐driven organic Rankine cycles

A novel dual feedwater circuit for a parabolic trough solar power plant

Multi‐objective assessment of a DAPTC based on 4E analysis: Water‐energy‐environment nexus

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