Design analysis factors and specifications of solar dish technologies for different systems and applications

Hafez, A.Z.; Soliman, A.; El-Metwally, K.A.; Ismail, Ibrahim

doi:10.1016/j.rser.2016.09.077

Cited by 104 publications

(26 citation statements)

References 92 publications

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“…Some advantages of the dish-Stirling system are that it has high cycle thermal efficiency, fewer moving parts than other systems of similar dimensions, and a smooth-running, quiet engine [13]. The greatest developments in parabolic dish systems have taken place since the 70s through continuous research aimed at optimising their components [10], [14], [15]. This is demonstrated in a number of works dedicated to: the optimisation of the absorber temperature [16], [17], [18]; the influence of the solar collector design parameters on engine efficiency [19]; energy and exergetic analyses [20], [21] and the multi-objective optimisation [22], [23] of dish-Stirling systems.…”

Section: Introductionmentioning

confidence: 99%

A validated energy model of a solar dish-Stirling system considering the cleanliness of mirrors

Buscemi¹,

Brano²,

Chiaruzzi³

et al. 2020

Applied Energy

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Solar systems based on the coupling of parabolic concentrating collectors and thermal engines (i.e. dish-Stirling systems) are among the most efficient generators of solar power currently available. This study focuses on the modelling of functioning data from a 32 kWe dish-Stirling solar plant installed at a facility test site on the University of Palermo campus, in Southern Italy. The proposed model, based on real monitored data, the energy balance of the collector and the partial load efficiency of the Stirling engine, can be used easily to simulate the annual energy production of such systems, making use of the solar radiation database, with the aim of encouraging a greater commercialisation of this technology. Introducing further simplifying assumptions based on our experimental data, the model can be linearised providing a new analytical expression of the parameters that characterise the widely used Stine empirical model. The model was calibrated against datacorresponding to the collector with clean mirrors and used to predict the net electric production of the dish-Stirling accurately. A numerical method for assessing the daily level of mirror soiling without the use of direct reflectivity measures was also defined. The proposed methodology was used to evaluate the history of mirror soiling for the observation period, which shows a strong correlation with the recorded sequence of rains and dust depositions. The results of this study emphasise how desert dust transport events, frequent occurrences in parts of the Mediterranean, can have a dramatic impact on the electric power generation of dish-Stirling plants.

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Section: Introductionmentioning

confidence: 99%

A validated energy model of a solar dish-Stirling system considering the cleanliness of mirrors

Buscemi¹,

Brano²,

Chiaruzzi³

et al. 2020

Applied Energy

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“…And public lighting is an important part of current energy consumption. 13 Solar dish systems are applied widely to collect solar radiation for photovoltaic 14,15 and thermal energy employing [16][17][18][19] as a result of their high concentrated radiation intensity 20,21 to make solar energy utilized efficiently. Sunlight optical fiber lighting was proposed in 1980, 8 which has become an important way of implementation.…”

Section: Introductionmentioning

confidence: 99%

“…The system presented in this paper can greatly obtain and concentrate solar radiation by applying a large dish. 13 Solar dish systems are applied widely to collect solar radiation for photovoltaic 14,15 and thermal energy employing [16][17][18][19] as a result of their high concentrated radiation intensity 20,21 to make solar energy utilized efficiently. 14,22 By the surface of dish concentrator coated with beam split thin film 23 and coupled with thin film solar cells, 24 accounting for 38.9% of the total radiant energy of sunlight, the visible (VIS) light (400-760 nm) 25 is split into 2 equal parts by beam split thin film, of which the first 50% VIS light beam is reflected and concentrated onto a secondary reflector and then reflected into fiber-optic bundle (FOB), while the rest 50% VIS light and other spectral radiation (300-400 nm and 760-1800 nm) will be transmitted through the beam split thin film and absorbed and transformed into electricity by thin-film solar cells underneath the beam split thin film.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a large dish-type concentrator solar lighting system for underground car park

Song

Liao

et al. 2018

Int J Energy Res

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Summary To utilize solar energy more efficiently and reduce lighting power consumption in underground public spaces such as car park, a large dish‐type concentrator solar lighting system is put forward along with its evaluation, which is a unique design to apply a laminated layer of beam split thin‐film coating and thin‐film solar cells onto the dish reflector. The collected sunlight is split into 2 parts, one being reflected into a fiber optical bundle and transmitted for daylighting, while the rest being absorbed by solar cells for electricity generation as the other way to replenish daylighting. A set of 4 solar lighting systems using 3.28‐m diameter dish are designed to meet the lighting requirement in a 1771‐m2 underground car park. A mathematical model is adopted to calculate the output power and conversion efficiency of solar cells distributed on the parabolic dish surface. The indoor illuminance distribution is given by lighting simulation. The results indicate that the average daylight illuminance in the car park can vary between 62.7 and 284 lx on February 25, 2016 and between 62.7 and 353 lx on August 17, 2016 for 2 chosen days, respectively. For the presented design, the electricity produced by solar cells is just enough to power light‐emitting diodes for lighting meeting a criterion at night. Considering about 19% conversion efficiency of solar cells and the efficacy of 129.5 lm/W of light‐emitting diodes, the hybrid solar lighting system can have about 40% utilization ratio of solar energy, so it can be concluded that a sufficient lighting provision can be provided by the proposed large dish‐type concentrator solar lighting system for applications in underground car park.

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“…Presently, the following four methods are used to concentrate the solar thermal power such as linear Fresnel system, solar dish system, parabolic trough system, solar tower systems. The performance of the solar dish concentration is strongly depending on the design, sizing the aperture and diameter of the receiver, diameter of the dish, azimuth and elevation angle [1][2]. In order to track the sun a photosensitive sensor and coordinate calculation algorithm is used.…”

Section: Introductionmentioning

confidence: 99%

Real Time Clock based Energy Efficient Automatic Dual Axis Solar Tracking System

Kumar.N¹,

Subramaniam²

2018

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This paper describes the design, implementation and performance of a real time clock (RTC) based dual axis solar tracking system and asymmetric solar dish concentrator. Numerous algorithm and functional program methodologies are implemented in order to optimizing the energy efficiency of the RTC based simple electromechanical dual axis solar energy tracking system. In this presented work, a RTC (Real Time Clock) based dual axis solar tracking system and solar dish concentrator is designed, implemented and tested based on current time and photodiode sensor based daily tracking method. In daily morning, the photo diode sensor in solar tracking system is used to align the solar concentrator for the initial position. The developed solar tracking system can follow the sun at various days, months and seasons. So, the solar tracking system needs a RTC (Real Time Clock) in order to leading the solar tracking system in finding sun's position for the daily, monthly and seasonal movement. So, the combination of both RTC and sensor based tracking system gives the designed solar tracking system as an efficient one. Time based algorithm is successfully performed to various months in order to track the sun. An entire asymmetric solar dish concentrator is covered by 1 x 1 inch glass mirrors. The solar dish concentrator has reached maximum solar concentration with the help of this continuous RTC tracking method. The experiment was conducted in the month of March, April and May 2017. The maximum temperature of 415 o C was recorded at the time of experiment. It is found that thermal power gain of RTC based dual axis solar tracking system is 75% compared to the fixed solar concentrator system. of the photosensitive sensor [3]. Six photo-transistor feedbacks are used to control an automated solar concentrator system. It is two axis tracking system both elevation and azimuth angle controlled by six photo transistor sensors covered with lens [4]. PLC based open loop two axis tracking system is used for solar dish concentrator (SDP) [5]. The efficiency of the manual tracking will be less than the automatic solar tracking system. The efficiency will be increased when the solar irradiation is perpendicular to the receiver. It is done by the automatic tracking system [6][7]. The path of the sun was found with the help of analog and digital techniques along with phototransistors [8]. The PLC based software programming method of two axes solar tracking is used to increase the energy of 41.34% than the fixed system [9]. Portable Dish Concentrator with solar tracking system was increased efficiency to 30% [10]. Spherical solar cooker with automatic PLC and frequency control tracking system produced temperature to 93oC [11]. MPPT algorithm in solar tracking system has produced in 12 to 30% percentage of energy than the fixed system [12]. The combination of electronics and mechanical solar tracking system is used for aligning the solar concentrators. The maximum energy can be yield from this electro-mechanical system [13][14]. FPGA (Field progra...

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Design analysis factors and specifications of solar dish technologies for different systems and applications

Cited by 104 publications

References 92 publications

A validated energy model of a solar dish-Stirling system considering the cleanliness of mirrors

A validated energy model of a solar dish-Stirling system considering the cleanliness of mirrors

Evaluation of a large dish-type concentrator solar lighting system for underground car park

Real Time Clock based Energy Efficient Automatic Dual Axis Solar Tracking System

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