Design, simulation and optimization of a solar dish collector with spiral-coil thermal absorber

Pavlović, Saša; Bellos, Evangelos; Stefanovic, P Velimir; Tzivanidis, Christos; Stamenkovic, M Zoran

doi:10.2298/tsci160213104p

Cited by 50 publications

(26 citation statements)

References 16 publications

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“…More details about this system can be found in our previous studies. [23][24][25] The thermal efficiency of the solar collector has been found experimentally in other studies. 24,25 Moreover, a detailed numerical model has been developed in these studies, and it has been validated with the experimental results.…”

Section: The Examined Solar Collectormentioning

confidence: 60%

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Parametric analysis and yearly performance of a trigeneration system driven by solar‐dish collectors

et al. 2019

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Summary Solar‐driven polygeneration systems are promising technologies for covering many energy demands with a renewable and sustainable way. The objective of the present work is the investigation of a trigeneration system, which is driven by solar‐dish collectors. The examined trigeneration system includes an organic Rankine cycle (ORC), which operates with toluene, and an absorption heat pump, which operates with LiBr/H2O. The absorption heat pump is fed with heat by the condenser of the ORC, which operates at medium temperature levels (120°C to 150°C). The absorption heat pump produces both useful heat at 55°C and cooling at 12°C. The ORC produces electricity, and it is fed by the solar dishes. The examined ORC is a regenerative cycle with superheating. The total analysis is performed with a developed model in Engineering Equation Solver (EES). The system is investigated parametrically for different ORC heat‐rejection temperatures, different superheating levels in the turbine inlet, and various solar‐beam irradiation levels. Furthermore, the system is investigated on a yearly basis for the climate conditions of Athens (Greece) and for Belgrade (Serbia). It is found that the yearly system energy and exergy efficiencies are 108.39% and 20.92%, respectively, for Athens, while 111.38% and 21.50%, respectively, for Belgrade. The values over 100% for the energy efficiency are explained by the existence of a heat pump in the examined configuration. For both locations, the payback period is found close to 10 years and the internal rate of return close to 10%. The final results indicate that the examined configuration is a highly efficient and viable system, which operates only with a renewable energy source.

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Section: The Examined Solar Collectormentioning

confidence: 60%

“…This is a low‐cost system, which can have an acceptable efficiency. More details about this system can be found in our previous studies …”

Section: Methodsmentioning

confidence: 93%

Parametric analysis and yearly performance of a trigeneration system driven by solar‐dish collectors

et al. 2019

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“…The experimental results were recorded every 1 hour and the thermal performance was presented in Figs. (8)(9)(10)(11)(12)(13)(14) for different days at the same flow rate of water. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The results in Figs. (9)(10)(11) show that when using the helical tube, the output temperature, useful heat gain and thermal efficiency increase by 27.3%, 29.6% and 35.2%, respectively as compared with the straight tube. Therefore, it can be concluded that the helical tube with tracking system is more efficient than the straight tube.…”

Section: Resultsmentioning

confidence: 99%

“…The hot water generated by this technique could be beneficial in agricultural, domestic, and industrial process heat applications. Pavlovic, et al, 2016 [10] presented an analysis for the optical and thermal performance of a parabolic dish solar concentrator containing a spiral coil receiver. The dish reflector contains eleven curvilinear trapezoidal reflective petals built by PMMA with silvered mirror layer and has a 3.8m diameter and 2.26m focal distance.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Performance Analysis of Parabolic Trough Solar Concentrator with Helical Tube Receiver

Hamidi

Mohammed

Reda

2018

NJES

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In this paper, the experimental thermal performance for a parabolic trough solar concentrator (PTSC) combined with helical tube receiver and directed by two axes solar tracking system at different amount of water flow rates has been analyzed. The experimental test results of thermal performance with regard to temperature rise of water, useful heat gain and collector thermal efficiency for the PTSC prototype at controlled water flow rates (2.3, 22.5 and 29.4 L/h) are collected. The results show that the increase of water mass flow rates causes decrease in the average water output temperature as (120.8, 63.82 and 46.08oC), respectively, the maximum outlet temperature becomes (160.5, 76, 47) oC, respectively, and thus, the average useful heat gain will be (1249.4, 732, 732.5W), respectively and the average thermal efficiency decreases as (73.021, 49.51 and 44.31 %), respectively. The experimental results show that decrease the water mass flow rate by 74.4%, causes an increase in the thermal efficiency of the PTSC by 64.7%.

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Cogeneration system driven by solar dish concentrators

Pavlović¹,

Bellos

Said

2021

Env Prog and Sustain Energy

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The objective of this study is the investigation of a cogeneration system for heating and electricity production, which is driven by solar dish concentrators. There is an organic Rankine cycle (ORC) driven by the solar field and produces electricity with its turbine and heating from its condenser. The solar field includes 100 m 2 of solar dish concentrators with spiral absorber and an insulated storage tank of 4 m 3 storage volume. The system is examined parametrically for different pressure levels in the turbine inlet and superheating degree. The system exergy efficiency is maximized for a superheating of 30 K and a maximum pressure equal to 70% of the toluene critical pressure. In this case, the system produces 12.41 kW electricity, 28.55 kW heating, while the energy efficiency is 51.20%, and the exergy efficiency is 20.69%. Moreover, the system is examined for a typical sunny day, and it is found that the electricity production is 125.6 kWh, the heating production 288.86 kWh, the energy efficiency 48.96%, and the exergy efficiency 19.77%. In the end, the simple payback period of the examined system is found at 6.28 years, which is a good value. K E Y W O R D Scogeneration, combined heat and electricity, organic Rankine cycle, solar dish collector, toluene | INTRODUCTIONSolar irradiation is a promising energy source to cover a significant part of the human energy needs cleanly and sustainably. 1,2 Solar concentrating power is a valuable tool to exploit properly solar irradiation and to gain a significant exergy part from it. 3,4 Solar dish concentrators are focal point solar devices that can be used in high-temperature applications to lead to high exergy system efficiency. 5 Solar dishes can be used in numerous applications for power production, cooling, heating, cogeneration, and trigeneration. 6,7

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Design, simulation and optimization of a solar dish collector with spiral-coil thermal absorber

Cited by 50 publications

References 16 publications

Parametric analysis and yearly performance of a trigeneration system driven by solar‐dish collectors

Parametric analysis and yearly performance of a trigeneration system driven by solar‐dish collectors

Thermal Performance Analysis of Parabolic Trough Solar Concentrator with Helical Tube Receiver

Cogeneration system driven by solar dish concentrators

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