A detailed parametric analysis of a solar dish collector

Stefanović, Velimir; Pavlović, Saša; Bellos, Evangelos; Tzivanidis, Christos

doi:10.1016/j.seta.2017.12.005

Cited by 50 publications

(43 citation statements)

References 35 publications

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“…The mathematical background of the study has been discussed in detail in Loni et al (2018c); Pavlovic et al 2017; Stefanovic et al (2018). In this study, only the main equations for the D cr are presented.…”

Section: Basic Mathematical Backgroundmentioning

confidence: 99%

Experimental investigation of the receiver of a solar thermal dish collector with a dual layer, staggered tube arrangement, and multiscale diameter

Dulaimi

2020

Energy Exploration & Exploitation

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A new experimental model is proposed and tested to enhance the ability of receivers of solar thermal dish collectors in absorbing solar energy. An innovative model consisting of a dual layer, staggered arrangement, and multiscale diameter tubes is established. The enhancement augments the capability of the solar receiver of the collector to transform solar energy to thermal energy within the heat transfer fluid. The new design depends on the exploitation of the dead regions of the solar receiver, that is, surfaces with weak solar energy absorption which include the space between the pipes and the terminal sides of the pipes. The surface areas of the circular pipes in these regions are almost parallel to the solar energy radiation, which leads to a reduction in the ability of the tube to absorb solar energy. The design was validated through five receiver ([Formula: see text]) models for solar thermal dish collectors, in addition to the model base (which has single layer). Each model consists of a two-layer staggered arrangement and tubes with four different staggered diameter ratios [Formula: see text] between the two layers. Each of them has an octagonal shape and consists of three serial paths of copper tubes; each path consists of a bank of parallel tubes. The results show a noteworthy increase in the ability of the receiver to absorb solar energy and greater with model ([Formula: see text]) which [Formula: see text]equal (0.269) than for a plain tube collector. The enhancement leads to an increase in the thermal efficiency [Formula: see text]and exergetic performance [Formula: see text], that equal (78.8%) and (19.8%) respectively at (0.07 kg/s). Furthermore, the pressure difference, and efficiency evaluation criterion was estimated to evaluate dish collector receivers.

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Section: Basic Mathematical Backgroundmentioning

confidence: 99%

Experimental investigation of the receiver of a solar thermal dish collector with a dual layer, staggered tube arrangement, and multiscale diameter

Dulaimi

2020

Energy Exploration & Exploitation

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“…The solar collectors divided into flat plate collectors and concentrated collectors. In the recent years, the research works have increased on the concentrated solar energy systems [2][3][4]. Dish concentrator is a kind of the concentrator collectors.…”

Section: Introductionmentioning

confidence: 99%

Thermal Evaluation of Cavity Receiver Using Water/Pg as the Solar Working Fluid

Kasaeian¹

2019

Journal of Thermal Engineering

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In this study, a parabolic dish concentrator with a cavity receiver was investigated. Water/ Propylene Glycol (PG) was used as the solar heat transfer fluid. Thermal numerical modelling was developed for prediction of the cavity receiver performance. The water/PG in different volume fractions (VF) of the PG was examined consist of 0%, 25%, 50%, and 55%. The working fluid inlet temperature is investigated in ranging 0 o C to 100 o C. The results revealed that the thermal efficiency and the cavity heat gain decreased by increasing the GP volume fraction. The pressure drop and pumping work demand decreased by increasing the working fluid inlet temperature as well as decreasing the PG volume fraction in the pure water. Consequently, the pure water had the lowest amount of the pressure drop among the investigated working fluids. The cavity surface temperature increased by increasing the working fluid inlet temperature as well as increasing the PG volume fraction in the pure water. Consequently, the application of the higher amount of PG is recommended for the Bryton cycle.

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“…It was found that exergetic efficiency of 12.29% was obtained for Cu oil–based nanofluid with the corrugated absorber. Velimir Stefanovic et al investigated detailed parametric analysis of various factors such as inlet temperature, flow rate absorber emittance, optical efficiency, wind velocity, and ambient temperature for solar dish collector with spiral coil absorber tube . It was stated that the thermal and exergetic efficiency of 49.83% and 21.42% is obtained for optimum temperature and flow rate of 212.3°C and 314.6 L/h, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Velimir Stefanovic et al investigated detailed parametric analysis of various factors such as inlet temperature, flow rate absorber emittance, optical efficiency, wind velocity, and ambient temperature for solar dish collector with spiral coil absorber tube. 21 It was stated that the thermal and exergetic efficiency of 49.83% and 21.42% is obtained for optimum temperature and flow rate of 212.3°C and 314.6 L/h, respectively. Walter Nsengiyumva et al reviewed commonly used solar tracking systems and highlighted their benefits in terms of efficiency, tracking accuracy, easy installation, and cost.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of a two-axis tracking system for solar parabolic dish collector

Natarajan¹,

Thampi²,

Shaw³

et al. 2018

Int J Energy Res

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Summary In this paper, an attempt has been made to develop a two‐axis tracking system for solar parabolic dish concentrator and experimentally evaluated the performance of the tracking system. In this proposed design, the sensor design uses the illumination produced by the convex lens on the apex of a pyramid to align the dish in‐line with the sun. The change in incident angle of the solar rays on the lens surface shifts the area of illumination from the apex of the pyramid towards its faces. Photodiodes placed on the faces of the pyramid are used as the sensitive elements to detect the movement of the sun. The sensor output is fed to a microcontroller‐based system to drive the stepper motor on the basis of the programmed algorithm such that it receives normal incidence of sunlight on the sensor. To evaluate the performance of the proposed system, a conventional available 1‐W photovoltaic (PV) panel is placed at the focal point to measure the short circuit current and open circuit voltage. With respect to the conventional solar PV panel, it is observed that the positioning accuracy of the proposed tracking system enhances the short circuit current of 0.11 A by 86%. Thus, the proposed tracking system can be used in a stand‐alone parabolic dish with concentrating PV module as the focal point for further studies.

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A detailed parametric analysis of a solar dish collector

Cited by 50 publications

References 35 publications

Experimental investigation of the receiver of a solar thermal dish collector with a dual layer, staggered tube arrangement, and multiscale diameter

Experimental investigation of the receiver of a solar thermal dish collector with a dual layer, staggered tube arrangement, and multiscale diameter

Thermal Evaluation of Cavity Receiver Using Water/Pg as the Solar Working Fluid

Experimental analysis of a two-axis tracking system for solar parabolic dish collector

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