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Das, S., S. S. Solomon i A. Saini. "Thermal analysis of paraboloid dish type solar cooker". Journal of Physics: Conference Series 1276 (sierpień 2019): 012055. http://dx.doi.org/10.1088/1742-6596/1276/1/012055.
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Marra, Antonio, Massimo Santarelli i Davide Papurello. "Solar Dish Concentrator: A Case Study at the Energy Center Rooftop". International Journal of Energy Research 2023 (10.08.2023): 1–18. http://dx.doi.org/10.1155/2023/9658091.
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Concentrating solar technology plays a role, albeit a niche role compared to commercial solar systems (photovoltaics and thermal collectors). Within the context of sustainable development and within the green transition phase, it could be a respectable player. The main purpose of this study is to create and validate a model that approximates the temperature trend of a receiver installed in a CSP (concentrated solar plant). A method to approximate optical and thermal performance is discussed. The paraboloid installed in the Energy Center (Turin, Italy) was taken as a reference, creating a model that could simulate real operating conditions. The Monte Carlo (MC) method for ray tracing was adopted developing two models. The first model sets the maximum reflectivity of the paraboloid and neglects the loss of “limb darkening,” while the second one sets a reflectivity of 80%. Once the incident flux was obtained, the optical performance was analytically calculated and compared to the value provided by the manufacturer. The thermal performance was also studied, reproducing the dimensions of the receiver consisting of a sintered alumina tube placed at a focal distance from the paraboloid. Two configurations were analyzed: one neglecting the losses due to radiation and natural convection, the other one including the losses due to radiation and considering the atmospheric wind condition. Finally, the model was validated by comparing the obtained temperatures with those measured by thermocouples placed on the receiver. Analyzing two random days in the year 2020, an average error of 7% and 2% was obtained.
3
Bellos, E., C. Tzivanidis i K. Antonopoulos. "Design and Simulation of a New Solar Paraboloid Dish Collector". Journal of Solar Energy Research Updates 2, nr 2 (21.07.2016): 40–46. http://dx.doi.org/10.15377/2410-2199.2015.02.02.4.
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Alami, Abdul Hai. "Assessment of Using Secondary Concentrators for Nonferrous Material Removal Applications". Advanced Materials Research 939 (maj 2014): 506–13. http://dx.doi.org/10.4028/www.scientific.net/amr.939.506.
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The paper investigates using a secondary solar concentrator to augment the solar energy density focused by a primary concentrator (a paraboloid dish). The secondary concentrator protects the focal point from cooling by convection from wind, and also would harness all the solar rays reflected by the primary concentrator, resulting in reduced losses due to aberration and other errors in finding the focal point. The intended application is the utilization of solar energy for nonferrous material ablation that could potentially replace or assist industrial lasers
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A'laa Taghi Al-Azawi i Ali A. F. Al Hamadani. "The Effect of Different Absorber Configurations On The Exergy and The Energy of Parabolic Solar Dish". Wasit Journal of Engineering Sciences 7, nr 3 (11.04.2020): 1–13. http://dx.doi.org/10.31185/ejuow.vol7.iss3.133.
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Abstract— The solar energy is the most important type of energy. The parabolic dish solar collector (PDSC) is the best type among other solar collectors because it is always tracking the sun movement. The exergy and the energy performances of a PDS were analyzed experimentally and numerically. The effect of different coil geometries and different mass flow rates of heat transfer fluid (HTF) were investigated. The PDS has parabolic dish and receiver with diameter (1.5) m and (0.2) m respectively. Concentration ratio is 56.25. The parabolic polar dish was supported by a tracking system with two axes. The types of the copper absorber were used which are: (spiral –helical) coil (SHC) and spiral-conical coil (SCC). The results showed that the useful energy and thermal efficiency are varying with solar radiation variation. The useful energy varying between (480-765) W for (SHC), the thermal efficiency varying between (35.2-39.8) % for (SHC). Exergy efficiency varying between (6.9 –8.6) %. It was shown that the higher values of useful energy for (spiral – helical) absorber was 0.1L/min flow rate.
REFERENCES
1. T. Taumoefolau , K. Lovegrove ," An Experimental Study of Natural Convection Heat Loss from a Solar Concentrator Cavity Receiver at Varying Orientation. ", Australian National University,, Canberra ACT 0200 AUSTRALIA.2002
2. S. PAITOONSURIKARN and K. LOVEGROVE," On the Study of Convection Loss from Open Cavity Receivers in Solar Paraboloidal Dish Applications ", Australian National University Canberra ACT 0200, AUSTRALIA, pp 154,155,2003
3. Soteris A. Kalogirou*,"Solar thermal collectors and applications", Higher Technical Institute, Progress in Energy and Combustion Science 30 (2004) 231–295, pp237, 240, 241, 2004
4. M. Prakash, S.B. Kedare, J.K. Nayak," Investigations on heat losses from a solar cavity receiver", Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India,2008.
5. Shiva Gorjian1, Barat Ghobadian1, Teymour Tavakkoli Hashjin1, and Ahmad Banak ,"Thermal performance of a Point-focus Solar Steam Generating System ", 21st Annual International Conference on Mechanical Engineering-ISME201 7-9 May, 2013, School of Mechanical Eng., K.N.Toosi University, Tehran, Iran ,1ISME2013-1195,2013
6. Kailash Karunakaran1 Hyacinth J Kennady2 ,"Thermal Analysis of Parabolic Dish Snow Melting Device " ,International Journal for Research in Technological Studies| Vol. 1, Issue 3, February 2014 | ISSN (online): 2348-1439,2014
7. Charles-Alexis Asselineau, Ehsan Abbasi, John Pye "Open cavity receiver geometry influence on radiative losses" Australian National University (ANU), Canberra, ACT 0200 Australia. Solar2014: The 52nd Annual Conference of the Australian Solar Council 2014
8. Vahid Madadi, Touraj Tavakoli and Amir Rahimi First and second thermodynamic law analyses applied to a solar dish collector" DOI 10.1515/jnet-2014-0023 | J. Non-Equilib. Thermodyn. 2014; 39 (4):183–197
9. Yaseen. H. Mahmood , Mayadah K h. Ghaffar " Design of Solar dish concentration by using MATLAB program and Calculation of geometrical concentration parameters and heat transfer" , University of Tikrit , Tikrit , Iraq, Tikrit Journal of Pure Science 20 (4) ISSN: 1813 – 1662, 2015.
10. Vanita Thakkar, Ankush Doshi, Akshaykumar Rana "Performance Analysis Methodology for Parabolic Dish Solar Concentrators for Process Heating Using Thermic Fluid IOSR", Journal of Mechanical and Civil Engineering (IOSR-JMCE) eISSN: 2278-1684,p-ISSN: 2320-334X, Volume 12, Issue 1 Ver. II (Jan- Feb. 2015), PP 101-114
11. Saša R. pavlovi, Evangelos A. bellos, Velimir P. Stefanovi, Christos Tzivanidis and Zoran M. Stamenkovi "Design, Simulation ,and Optimiztion Of A Solar Dish Collector with spiral coil absorber ", , Nis, Serbia, thermal SCIENCE, Vol. 20, No. 4, pp. 1387-1397 1387,2016
12. Flávia V. Barbosa, João L. Afonso, Filipe B. Rodrigues, and José C. F. Teixeir," Development of a solar concentrator with tracking system", University of Minho,Guimarães, 4800-058, Portugal2016
13. O. López, A. Arenas, and A. Baños"Convective Heat Loss Analysis of a Cavity Receiver for a Solar Concentrator" International Conference on Renewable Energies and Power Quality (ICREPQ’17)Malaga (Spain), 4th to 6th April, 2017 ,ISSN 2172-038 X, No.15 April 2017 RE&PQJ, Vol.1, No.15, April 2017
14. D.R.Rajendran,E.GanapathySundaram,P.Jawahar "Experimental Studies on the Thermal Performance of a Parabolic Dish Solar Receiver with the Heat Transfer Fluids Sic water Nano Fluid and Water", Journal of Thermal Science Vol.26,
15. Muhammad Shoaib, Muhammad , Jameel Kabbir Ali ,Muhammad Usman1, Abdul Hannan " Analysis of thermal performance of parabolic dish collectors having different reflective" ,NFC institute of engineering &fertilizer research ,2018 .
16. Sasa PAVLOVIC, Evangelos BELLOS, Velimir STEFANOVIC ,Christos TZIVANIDIS " EXPERIMENTAL AND NUMERICAL INVESTIGATION OF A SOLAR DISH COLLECTOR WITH SPIRAL ABSORBER" A CTA TECHNICA CORVINIENSIS – Bulletin of Engineering Tome XI [2018] .
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Khan, Muhammad Sajid, Muhammad Abid, Khuram Pervez Amber, Hafiz Muhammad Ali, Mi Yan i Samina Javed. "Numerical Performance Investigation of Parabolic Dish Solar-Assisted Cogeneration Plant Using Different Heat Transfer Fluids". International Journal of Photoenergy 2021 (28.04.2021): 1–15. http://dx.doi.org/10.1155/2021/5512679.
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Parabolic dish solar collectors gain higher solar to thermal conversion efficiency due to their maximum concentration ratio. The present research focuses by integrating the parabolic dish solar collector to the steam cycle producing power and rate of process heating. Pressurized water, therminol VP1, and supercritical carbon dioxide are the examined working fluids in the parabolic dish solar collector. The aim of the current research is to observe the optimal operating conditions for each heat transfer fluid by varying inlet temperature and flow rate of the working fluid in the parabolic dish solar collector, and combination of these parameters is predicted to lead to the maximum energy and exergy efficiencies of the collector. The operating parameters are varied to investigate the overall system efficiencies, work output, and process heating rate. Findings of the study declare that water is an efficient heat transfer fluid at low temperature levels, whereas therminol VP1 is effective for a higher temperature range. The integrated system efficiencies are higher at maximum flow rates and low inlet temperatures. The efficiency map of solar collector is located at the end of study, and it shows that maximum exergy efficiency gains at inlet temperature of 750 K and it is observed to be 37.75%.
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A. B, BANDE, GARBA M. M, ALIYU S, HAMZA B.S i SHEHU A. "PERFORMANCE EVALUATION OF PARABOLIC CONCENTRATOR WITH THERMAL STORAGE SYSTEM FOR DOMESTIC APPLICATIONS". BIMA JOURNAL OF SCIENCE AND TECHNOLOGY (2536-6041) 6, nr 01 (30.04.2022): 29–40. http://dx.doi.org/10.56892/bimajst.v6i01.311.
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Solar energy is a free natural resource but its harvesting requires a high capital investment whichprohibits its maximum exploitation. A Parabolic Dish Solar Collector (PDSC) with a thermalstorage system was been constructed and developed to harness solar beam radiation. The thermalstorage system and PDSC were constructed using locally and less cost materials such asgalvanized metal sheet and steel rods curved to obey the equation of a parabola then weldedtogether with circular support rings which was then lined with stainless steel reflector pasted forthe construction of PDSC. The receiver was made of blackened aluminium material incorporatedwith coiled copper tube carrying water as the heat transfer fluid. A parabolic dish which acts of aheat collector is used to track and reflects solar radiation at a single point (focus) on a receiverabsorber. Heat transfer from the solar collector to the storage tank was done by usingthermosyphonic principle to circulate the water (heat transfer fluid) between storage tank andheating system (receiver). The evaluation of thermal storage and analyzing the efficiency oftracking and non-tracking parabolic dish solar collector was carried out during month of June,2020 for the composite climate of Sokoto. According to the finding, the efficiency of trackingPDSC with thermal storage system and non- tracking PDSC with thermal storage tank weredetermined and obtained to be 52.9% and 50% respectively.Keywords: thermal efficiency, parabolic dish collector, solar radiation, storage system andstainless steel reflector.
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Rahimoon, Asif Ahmed, Mohd Noor Abdullah, Dur Muhammad Soomro, Murad Yahya Nassar, Z. A. Memon i P. H. Shaikh. "Design of parabolic solar dish tracking system using arduino". Indonesian Journal of Electrical Engineering and Computer Science 17, nr 2 (1.02.2020): 914. http://dx.doi.org/10.11591/ijeecs.v17.i2.pp914-921.
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This paper demonstrates the designing parameters of a solar parabolic dish prototype for rustic areas with great solar irradiance rate availability, where have no access of electricity services or low-income people survives to buy a stove (electric or gas). The solar parabolic dish prototype intends a solution against these types of remedies and pursues solar light to work. The parabolic dish has a polished surface, where the solar radiations fall and collected at a single concentrated focal point. At this point the collected form of energy is used to derive different thermal applications like as; cooking & heating with single and dual axis schemes. This paper discusses the important stages of dual axis prototype; implementation, solar location strategy, the analysis in terms of theory, structural design & material. The dual axis prototype is implemented through the help of Arduino chipboard that is easily in maintenance, along with that this prototype is configured with anti-lock H-bridge (L298) module to overcome the control circuit complexity and AVR modules. Two rotational motors of 12V are installed on 4*4ft designed aluminum frame with a dual-axis tracking system. The jerks among trackers are also reduced with this prototype which maintains the experimental declination angle about .To finish, this paper results that parabolic solar dish tracker obtains 3.43% improved power efficiency in comparison of photovoltaic panel tracker.
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Liu, Yun, i Hong Zhang. "Selection of Working Fluids for Medium Temperature Heat Pipes Used in Parabolic Trough Solar Receivers". Advanced Materials Research 860-863 (grudzień 2013): 62–68. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.62.
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According to the methods of focusing,the solar thermal generation can be classified to tower system,parabolic trough system and dish-stirling system. The parabolic solar thermal generation system is an important type of solar thermal utilization. Compared to tower and dish-stirling system,the parabolic trough system has many advantages such as the small concentration ratio,the simple process,the low material requirement and the simple tracking device because of many concentrator on-axis tracking. The parabolic trough system is the lowest cost, least close to commercialization,larger potential system optimization,and the most suitable to large operation in this three thermal generation systems [1,. The parabolic trough system is composed of concentrator and receiver,and the receiver is the key component that uses solar energy to heat working fluids in receiver. Therefore,the key problem is how to make the solar energy transfer to subsequent generation system efficiently and stably.
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Alwan, Naseer T., H. M. Milia, S. E. Shcheklein i A. V. Matveev. "Dual axis solar tracking system for a parabolic dish CPU water heater". Journal of Physics: Conference Series 2119, nr 1 (1.12.2021): 012098. http://dx.doi.org/10.1088/1742-6596/2119/1/012098.
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Abstract The solar parabolic dish water heater is highly efficient but has limited hours of work only when sunlight is perpendicular to its surface. Therefore, this work aims to continue the work of the solar parabolic dish in the daytime using a dual tracking system, depending on the geographic location of the system (longitude and latitude angles) and using the C # programming language. To verify the effect of the dual-axis solar tracking system, the current study considered two types of solar parabolic dishes, the first was fixed, and the second was a rotating dish (by the dual tracking system). It was observed that the water temperature at the outlet of the tracking type solar water heater is 22% higher than that for the fixed dish type; this means that the proposed system has improved the temperature of water in the heat exchanger. Therefore, the highest water temperature value of about 51.4ffiC was at the outlet of the heat exchanger for the tracking type at 1:00 pm, while the temperature recorded for the fixed type was about 46.1ffiC. The highest energy gained from the solar heating system was at 1:00 pm for both types, which was about 76.9 W from the tracking type and 54.7 W from the fixed type. It was also observed that in the fixed dish type, most energy losses occurred during the daytime, while for the tracer of the dish type, useful energy was gained during most of the sunny working hours depending on the solar radiation intensity.
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Mancini, Thomas R. "Analysis and Design of Two Stretched-Membrane Parabolic Dish Concentrators". Journal of Solar Energy Engineering 113, nr 3 (1.08.1991): 180–87. http://dx.doi.org/10.1115/1.2930490.
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The state-of-the-art of parabolic dish solar concentrators is the faceted, glass-metal dish. The mass production costs of glass-metal dishes may be high because they do not incorporate the innovations of design and materials developed over the last eight years. Therefore, Sandia National Laboratories has undertaken to develop two stretched-membrane parabolic dish concentrators for the Department of Energy’s Solar Thermal Program. These solar concentrators are being designed for integration with an advanced solar receiver and a Stirling engine/generator in a 25-kWe power production unit. The first dish, which builds on the successful design of the stretched-membrane heliostats, is to be a low risk, near-term commercial solar concentrator. This solar concentrator comprises 12 large, 3.6-m diameter, stretched-membrane facets that are formed into parabolic shapes either with a large vacuum or by performing the thin membranes plastically. The focal length-to-diameter ratios (f/Ds) for the facets are about 3.0, relatively large for a dish but much lower than heliostats where they typically range from 50 to 100. Two contractors are currently fabricating facets for this dish, and a third contractor is designing the facet support structure and pedestal for the dish. The second stretched-membrane concentrator is a single-element monolithic dish with an f/D of 0.6. The dish is shaped into a parabola by plastically yielding the membrane using a combination of uniform and nonuniform loading. Initial measurements of the dish indicate that it has a slope error of 2.6 milliradians (one standard deviation) relative to a perfect parabola. In this paper, the designs of the two stretched-membrane dishes are analyzed using the computer code CIRCE to model the optical performance of the concentrators and a thermal model, which includes conduction, convection, and radiation heat transfer, to calculate the thermal losses from the cavity solar receivers. The solar collector efficiency, defined as the product of the optical efficiency of the collector and the thermal efficiency of the receiver, is optimized for comparing the performance of several solar concentrator configurations. Ten facet arrangements for the faceted stretched-membrane dish and the single-element stretched-membrane dish are modeled and their performances compared with that of a state-of-the-art glass-metal dish. Last, the initial designs of these two stretched-membrane dishes are described along with the results of preliminary performance measurements on their respective optical elements.
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Hosseinzadeh, J., A. Mohhebi i R. Loni. "OPTICAL SIMULATION OF A SOLAR PARABOLIC COLLECTOR AND CAVITY RECEIVERS USING RAY-TRACING SOFTWARE TRACEPRO WITH NATIVE CONDITIONS OF IRAN FOR SOLAR DRYERS". INMATEH Agricultural Engineering 59, nr 3 (20.12.2019): 197–208. http://dx.doi.org/10.35633/inmateh-59-22.
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This paper proposes the design and optical evaluation of a solar dish collector with changeable structure using TracePro software with native conditions of Iran for solar dryers. The designed dish concentrator has a diameter of 1.5m. TracePro's goal is to design and evaluate complex optical systems. Modeling a parabolic concentrator in TracePro can be achieved using several methods. All segments of dish collectors are made of glass (perfect parabolic mirror with a reflection coefficient of 95%). In the ray-tracing simulations, the two cavity receiver model (cylindrical and semi-sphere) is added to study the influence of physical parameters of the cavity. The simulation result shows that semi-spherical receiver is better and it has got better optical performance. Thereby it is highly recommended for various types of solar dryers such as direct drying (solar box dryer), or indirect drying (solar cabinet dryer).
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Hannun, Rafid M., i Raheem M. Koban. "The Use of a Parabolic Solar Concentrator in Nasiriya city, Iraq". Journal of Petroleum Research and Studies 12, nr 1 (20.03.2022): 332–49. http://dx.doi.org/10.52716/jprs.v12i1.606.
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In this paper, it presents a detailed analysis of the use of the parabolic solar concentrator in heating and boiling water, as the parabolic solar concentrator was manufactured with a diameter of (96 cm), the focal length of the dish is (72 cm), and the focus depth of the dish is (8 cm). It was made using a parabolic dish with a diameter of (96 cm) and using glossy aluminum foil as a reflective sun ray after being cut into strips 10 cm wide and glued to the inner surface of the dish. Metal tin cans with two capacities (1L and 2L) were used as the absorbent receiver. Experiments were conducted to boil water from the roof of the house in Nassiriya city. The study calculated the optical efficiency of the equivalent solar concentrator, the amount of heat output as a result of the fall of concentrated solar radiation on the receiver, the amount of useful heat gained, the thermal losses from the receiver, the collector efficiency. Many tests were conducted in Nassiriya city weather conditions.
The results of the experiments showed that the efficiency of the solar center mainly depends on the diameter of the concentrator dish, the quality of the reflector used, the time of heating the water, and the closing to midday. While the high ambient air velocity leads to a decrease in the receiver temperature by increasing the heat loses to ambient air by convection, thus reducing the efficiency of the solar concentrator; as well as the accuracy of directing the dish towards the sun and determining the focus accurately also affects the efficiency of the solar concentrator.
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Shufat, Salem Alaraby Ali, Erol Kurt i Aybaba Hancerlioğulları. "Modeling and Design of Azimuth-Altitude Dual Axis Solar Tracker for Maximum Solar Energy Generation". International Journal of Renewable Energy Development 8, nr 1 (2.02.2019): 7. http://dx.doi.org/10.14710/ijred.8.1.7-13.
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The sun tracking system that lets Parabolic Dish or PV panel orthogonal to the sun radiation during the day, can raise the concentrated sun radiation by up to 40%. The fixed Parabolic Dish cannot generally track the sun trajectory, also the single-axis tracking system can follow the sun in the horizontal direction (azimuth angle), while the two-axis tracker tracks the sun path in both azimuth and altitude angles. Dual axis automated control tracking system, which tracks the sun in two planes (azimuth and altitude) to move a Concentrated Parabolic Dish system to the direction of ray diffusion of sun radiation is studied and designed. The designed tracking system constructed of microcontroller or programmable logic control (PLC) with a digital program that operates sun tracker using driver, gear box to control the angular speed and mechanical torque, supports and mountings. Two steeper motors are modelled to guide the parabolic dish panel perpendicular to the sun's beam. In the present study, simulation scheme of two axis sun tracking system has been developed by operating under Matlab/Simulink. The program models and studies the effectiveness of overall system. The designed tracker has been studied with real data of sun trajectory angles (azimuth and altitude) as well as a Direct Normal Irradiation (DNI) to improve the effectiveness of parabolic dish panel by adding the tracking features to those systems according to the present site.©2019. CBIORE-IJRED. All rights reservedArticle History: Received May 18th 2018; Received in revised form October 8th 2018; Accepted January 6th 2019; Available onlineHow to Cite This Article: Shufat, S.A., Kurt, E, and Hancerlioğulları, A. (2019) Modeling and Design of Azimuth-Altitude Dual Axis Solar Tracker for Maximum Solar Energy Generation. Int. Journal of Renewable Energy Development, 8(1), 7-13.https://doi.org/10.14710/ijred.8.1.7-13
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Singh, Uday Raj, i Anil Kumar. "Exergy Analysis of a Domestic Type Solar Parabolic Dish Cooker". Advanced Science, Engineering and Medicine 12, nr 12 (1.12.2020): 1505–8. http://dx.doi.org/10.1166/asem.2020.2615.
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An experimental investigation of parabolic dish solar cooker for exergy analysis is presented in this study. The experiments were carried out using 3 litres of water as cooking fluid. Commercially available parabolic dish domestic concentrator (SK14) was used to focus the solar radiations whereas a blackened cooking vessel was used as a receiver. The average ambient temperature recorded for the experiment was 305.8 K and the mean ambient velocity of air was recorded as 2.03 m/s. The exergy efficiency varied from 1.79 to 2.47% for average solar radiation of 750 W/m2. The Therefore, performance is acceptable and recommended to use as affordable way of cooking using solar energy.
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Rahimoon, Asif Ahmed, Izhar Ahmed, Ali Abbas Kunbhar i Arslan Ahmed Sohu. "Automatic Positioned Controller Parabolic solar Dish Prototype". Sukkur IBA Journal of Emerging Technologies 1, nr 1 (27.06.2018): 1–6. http://dx.doi.org/10.30537/sjet.v1i1.159.
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This paper discusses the development of dual axis parabolic dish tracker application for automatized position power system. This prototype tackles solar light in solar sterling design system or concentrated photovoltaic design by implementation of digitalize control circuit to enhance CSP and CPV applications. A normally 121.92cm dish is designed with H-bridge controller technique & Slew drive actuator mode to capture solar irradiances. The surface of dish is polished with 12 aluminum bars to concentrate the solar irradiance in one reflective axis. Economic justification for Pakistan’s industries would be possible if these automated based renewable prototypes are promoted in market in compare of single PV panel. This prototype controls the all weather conditions, utilizing real time flexible timing control strategy and photoelectric tracking scheme to provide cost effective product for industrial power generation applications. This locally adaptive material based prototype encouraged the result about 33% efficient with compared to photovoltaic panel.
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Uma Maheswari, C., i R. Meenakshi Reddy. "CFD Analysis of a Solar Parabolic Dish". Applied Mechanics and Materials 787 (sierpień 2015): 280–84. http://dx.doi.org/10.4028/www.scientific.net/amm.787.280.
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Concentrated solar thermal (CST) power has been used for years to help supply power to certain energy markets and has proven to be fairly successful. Unfortunately the high prices of these solar technologies have prohibited them from really making a large impact on the world's energy scene. This study analyses the structural, thermal, and CFD performance of a parabolic dish concept which could be the basis for large scale commercial concentrated solar thermal electricity. Simulation of the structural, thermal and CFDanalysis of the dish with varying metallic properties (Aluminium, Copper and StainlessSteel) under different windconditionswas compared. Computational Fluid Dynamics (CFD) was done to simulate the thermal performance of the dish at two different wind velocities.
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Firak, Mihajlo. "Comparative analysis of the solar dish electricity production". Thermal Science 9, nr 3 (2005): 69–83. http://dx.doi.org/10.2298/tsci0503069f.
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Round parabolic solar mirror is of ten called the solar or sun dish. Even when the dish is faceted into several smaller dishes (facets) which are all focusing the sunlight in the single point (focus), it is called a solar dish. When solar radiation to electricity converter is mounted into the dish focus and the sun-tracking system is provided, it could be named solar dish/converter system. Depending on the sort of the converter, two promising systems which are approaching the commercialization could be mentioned. These are solar dish/Sterling system and solar dish/photo voltaic system. In this paper, majority of the technical and economical aspects of the two systems are examined and compared. Two systems are chosen to represent this: SAIC/STM Sun Dish TM, solar dish with Sterling heat engine/generator, and Solar Systems SS20TM representing solar dish with concentrating photovoltaic converter. It is concluded that solar dish with concentrated photovoltaic converter can have much better cost/performance ratio. It is also concluded that recently introduced thermo acoustical converter and photovoltaic cavity converter, probably des ignites future development of the solar dish systems. World?s potential of in stalling solar dish systems according to geographic and climate conditions wisest mated. Also, the number of solar dishes which could, in stalled in Croatia cover yearly state?s electricity consumption was calculated.
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Santoso, Dany Iman, Bambang Antoko i Djatmiko Ichsani. "Optimizing solar dish performance using analytical flux distribution in focal region". International Journal of Renewable Energy Development 9, nr 1 (4.02.2020): 63–67. http://dx.doi.org/10.14710/ijred.9.1.63-67.
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In this paper, thermal performance analysis of 4 m2 solar dish collector is presented.The focal image characteristics of the solar dish are determined to propose the suitable design of a receiver. A flat plate was used for the receiver to measure flux distribution in the focal region. The measurement had been done in the midday. Intercept factor based on this distribution had been calculated and was obtained to calculate thermal efficiency after total heat loss was described. From the experiment, total heat loss was formed by conductive and radiative in the receiver. The results showed that the increase in total heat loss followed the increase in receiver temperature and it caused a decrease in thermal efficiency. On the peak of the measurement or in midday, receiver temperature can achieve 138°C and it gave around 1200-Watt heat loss and it was dominated by radiative heat loss for around 80%. The thermal efficiency of the system due to flux distribution measurement in the focal region was above 70% and it was classified as high average but we needed to cover this flux up so it did not lose a lot of heat. Cavity aperture would keep around 20% total heat loss and it minimized radiative heat loss from the flux. The design of cavity aperture was the next discussion to insulate thermal heat reflection of the parabolic dish system from high radiative heat loss.©2020. CBIORE-IJRED. All rights reserved
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Pavlovic, Saša R., i Velimir P. Stefanovic. "Ray Tracing Study of Optical Characteristics of the Solar Image in the Receiver for a Thermal Solar Parabolic Dish Collector". Journal of Solar Energy 2015 (29.10.2015): 1–10. http://dx.doi.org/10.1155/2015/326536.
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This study presents the geometric aspects of the focal image for a solar parabolic concentrator (SPC) using the ray tracing technique to establish parameters that allow the designation of the most suitable geometry for coupling the SPC to absorber-receiver. The efficient conversion of solar radiation into heat at these temperature levels requires a use of concentrating solar collectors. In this paper detailed optical design of the solar parabolic dish concentrator is presented. The system has diameter D=3800 mm and focal distance f=2260 mm. The parabolic dish of the solar system consists of 11 curvilinear trapezoidal reflective petals. For the construction of the solar collectors, mild steel-sheet and square pipe were used as the shell support for the reflecting surfaces. This paper presents optical simulations of the parabolic solar concentrator unit using the ray tracing software TracePro. The total flux on the receiver and the distribution of irradiance for absorbing flux on center and periphery receiver are given. The goal of this paper is to present the optical design of a low-tech solar concentrator that can be used as a potentially low cost tool for laboratory scale research on the medium-temperature thermal processes, cooling, industrial processes, polygeneration systems, and so forth.
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Pavlovic, Sasa, Darko Vasiljevic, Velimir Stefanovic, Zoran Stamenkovic i Evangelos Bellos. "Optical analysis and performance evaluation of a solar parabolic dish concentrator". Thermal Science 20, suppl. 5 (2016): 1237–49. http://dx.doi.org/10.2298/tsci16s5237p.
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In this study, the optical design of a solar parabolic dish concentrator is presented. The parabolic dish concentrator consists from 11 curvilinear trapezoidal reflective petals made of polymethyl methacrylate with special reflective coating. The dish diameter is equal to 3.8 m and the theoretical focal point distance is 2.26 m. Numerical simulations are made with the commercial software TracePro from Lambda Research, USA, and the final optimum position between absorber and reflector was calculated to 2.075 m; lower than focus distance. This paper presents results for the optimum position and the optimum diameter of the receiver. The decision for selecting these parameters is based on the calculation of the total flux over the flat and corrugated pipe receiver surface; in its central region and in the peripheral region. The simulation results could be useful reference for designing and optimizing of solar parabolic dish concentrators as for as for CFD analysis, heat transfer and fluid flow analysis in corrugated spiral heat absorbers.
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Yan Jian, 颜健, 刘永祥 Liu YongXiang, 胡耀松 Hu YaoSong i 彭佑多 Peng YouDuo. "相同尺寸抛物/球面镜单元旋转阵列的碟式太阳能聚光器聚焦特性研究". Acta Optica Sinica 42, nr 15 (2022): 1522002. http://dx.doi.org/10.3788/aos202242.1522002.
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Thirunavukkarasu, V., i M. Cheralathan. "Thermal Performance of Solar Parabolic Dish Concentrator with Hetero-Conical Cavity Receiver". Applied Mechanics and Materials 787 (sierpień 2015): 197–201. http://dx.doi.org/10.4028/www.scientific.net/amm.787.197.
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Concentrated solar collectors have high efficiency as compared to flat plate and evacuated tube solar collectors. Cavity receivers are mainly used on the parabolic dish concentrators and tower type concentrator systems. The heat transfer surfaces of cavity receiver are composed by coiled metal tube. Heat transfer fluid flows in the internal spaces of coiled metal tube, and the external surfaces would absorb the highly concentrated solar energy. This paper explains the thermal performance of parabolic dish concentrator system with hetero-conical cavity receiver. The experimental analysis was done during the month of April 2014 on clear sunny days at Chennai [Latitude: 13.08oN, Longitude: 80.27oE] to study its thermal performance.
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Nyandang, Aneurin Nanggar Anak, Baljit Singh, Muhammad Fairuz Remeli, Raihan Abu Bakar i Amandeep Oberoi. "The Effect of Cooling Method in Parabolic Solar Dish Concentrator". Applied Mechanics and Materials 899 (czerwiec 2020): 11–21. http://dx.doi.org/10.4028/www.scientific.net/amm.899.11.
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Power generation from fossil fuels in the recent years causes pollution to the environment, thus renewable energy must be considered as an alternative. Solar energy comes directly from the sun and harnessing this energy is crucial for a sustainable future. In this research, a parabolic solar dish collector was utilized to harness the solar energy. The parabolic dish was hybridized with a thermoelectric generator (TEG) to produce both heat and electricity simultaneously. Since TEG has no moving parts, it requires almost no maintenance, thus making it reliable and robust. This paper presents the experimental investigation performed on the concentrator to convert heat energy from the concentrated solar power using TEGs. The goal of the project was to efficiently generate electricity by using the concentrating dish to concentrate the solar radiation onto the TEG. The TEG was installed on the focal point of the concentrating dish to convert the thermal energy into electricity directly. Air-cooled, fan-cooled and water-cooled cooling method were introduced to cool the generators. At the end of the experiment, it was found out that water-cooled cooling method induced the highest voltage among the other cooling methods.
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Zhan, Wen Bei, Guo Qiang Xu, Yong Kai Quan, Xiang Luo i Ting Ting Li. "Design and Analysis of a Novel Hybrid Solar/Gas Dish Stirling System (HS/GDSS)". Applied Mechanics and Materials 479-480 (grudzień 2013): 575–79. http://dx.doi.org/10.4028/www.scientific.net/amm.479-480.575.
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In this paper, a 20kW design capacity solar parabolic dish concentrator hybrid solar/gas dish Stirling system (HS/GDSS) is proposed. To ensure a steady operation of an electricity power plant, HS/GDSS uses gas as complement when solar radiation is weak. Thermodynamic models were made to conduct design of system parameters. After detail characteristics were chosen, analysis was carried out to evaluate this system. The results show that within design condition, overall efficiency of the system is 27.58% at daytime and 33.94% at night, which has advantages over single-energy solar dish Stirling electricity power plant.
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Lovegrove, K., G. Burgess i J. Pye. "A new 500m2 paraboloidal dish solar concentrator". Solar Energy 85, nr 4 (kwiecień 2011): 620–26. http://dx.doi.org/10.1016/j.solener.2010.01.009.
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Sookramoon, Krissadang, Pracha Bunyawanichakul i Bancha Kongtrakool. "Performance Evaluation of a Paraboloidal Concentrator". Applied Mechanics and Materials 799-800 (październik 2015): 463–67. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.463.
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This research aims are to design, build and analyze the performance of concentrated solar energy onto a simple calorimeter, made of copper and stainless steel. A scrapped yard antenna dish with a diameter of 1.68 meters was lined with aluminum foil reflector sheet. The average dish aperture area of 2.21 m2, the system uses water as a heat transfer fluid distributed from overhead tank. Absorbed energy was investigated at a water flow rate of 0.5 L/min were performed in the experiment and the maximum useful energy was determined. Parabolic dish concentrator displacement angle was adjusted in every 15 degrees per hour, with the used of electric controlled sun tracking system. The experimental tests carried out in Faculty of Industrial Technology, Vallaya Alongkorn Rajabhat University Pathum Thani, under Thailand climatic conditions (14.134°N, 100.611°E) during 2 selected days of the months April 2013. The performance of a paraboloidal concentrator was assessed using open-air experimental measurements including the incoming heat, the energy absorbed by the water, and the concentrator efficiency. The experimental results shown the maximum thermal efficiency was 89.73%. It was also found that copper calorimeter can simply attain during operation relatively high water temperature levels oncoming 97 °C. The concentrated solar flux at the focal point was 442,073.11W/m2 for stainless steel calorimeter and 619,448.66 W/m2 for copper calorimeter, respectively.
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AL-Khateeb, Sara Tahir, i Ahmad Mohammed Sinjari. "Design, Construction, and Control Tracking of Solar Thermal Concentrator by Using PLC in Erbil". Journal of Engineering 29, nr 3 (1.03.2023): 40–62. http://dx.doi.org/10.31026/j.eng.2023.03.04.
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This paper demonstrates the construction designing analysis and control strategies for fully tracking concentrated solar thermal by using programmable logic control in the city of Erbil-Iraq. This work used the parabolic dish as a concentrated solar thermal. At the focal point, the collected form of energy is used for heating a (water) in the receiver, analyzing this prototype in real-time with two different shapes of the receiver and comparing the results. For tracking the parabolic dish, four light-dependent resistors are used to detect the sun's position in the sky so that the tracking system follows it to make the beam radiation perpendicular to the collector surface all of the time during the day for maximum solar power energy. This work discusses the essential stages of a two-axis prototype; implementation, solar-location strategy, the analysis in terms of theory, structural design, and material. For two-axis-prototype is implemented with the help of programmable logic control -Siemens (S7-1200) as a control unit. This study results show that a parabolic dish tracker with a cylindrical conical receiver obtains 15.25% Improved efficiency in comparison to the cylindrical receiver. According to the testing results of the prototype design, both shapes of the receiver are convenient for steam production.
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El-Gamal, Eman H., Mohamed Emran, Osama Elsamni, Mohamed Rashad i Ossama Mokhiamar. "Parabolic Dish Collector as a New Approach for Biochar Production: An Evaluation Study". Applied Sciences 12, nr 24 (10.12.2022): 12677. http://dx.doi.org/10.3390/app122412677.
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The main factors influencing biochar properties are feedstock biomass and pyrolysis operational conditions. A solar parabolic dish collector was proposed as a new green approach to the pyrolysis process. The technique of this reactor was designed to produce biochar from sesame feedstock (SF) by concentrating solar radiation. This research aims to compare the main physical and chemical properties of biochar produced by the solar reactor to those of the conventional reactor (muffle furnace, SB-3). Biochar produced by the parabolic dish collector was a heterogeneous brown color. Depending on color intensity, biochar was divided into the biochar formed around the inner sidewalls of the internal chamber (SB-1) and the biochar formed in the upper part of the internal chamber (SB-2). Generally, the physiochemical properties of the SB-2 biochar were similar to the SB-3 biochar, while SB-1 biochar was similar to SF. This was because the temperature distribution was not uniform in the solar reactor. The proposed solar parabolic dish collector needs some modifications to upgrade the biochar production to be close to that produced by the electric instrument. SB-2 is preferred as a soil amendment depending on its pH, cation exchange capacity (CEC), elemental composition, ion molar ratio (H/C, O/C, and (O+N)/C), and acidic functional groups.
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Al-Farajat, Rabaa K., Mohamed R. Gomaa i Mai Z. Alzghoul. "Comparison Between CSP Systems and Effect of Different Heat Transfer Fluids on the Performance". WSEAS TRANSACTIONS ON HEAT AND MASS TRANSFER 17 (31.12.2022): 196–205. http://dx.doi.org/10.37394/232012.2022.17.21.
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While fossil fuel sources have declined and energy demand has increased, in addition to the climate change crisis, the world turned to using renewable energies to get its energy. Concentrated solar power (CSP) is one of the main technologies used for this purpose. This study aims to compare the different concentrated solar power technologies in terms of their efficiency, cost, concentration ratio, and receiver temperature. Results showed that technologies were arranged according to temperatures from high to low as follows; the parabolic dish reflector, central receiver collector, linear Fresnel reflector, and parabolic trough collector. According to cost, the parabolic dish reflector has the highest price, while the linear Fresnel reflector has the lowest price. Also, the parabolic dish reflector has the highest efficiency among the others, followed by the central receiver collector, then the linear Fresnel reflector, and the parabolic trough collector respectively. Additionally; the study represented that point-focus devices have a high percentage of concentration ratio than line-focus devices. Finally, in order to exploit these sources throughout the day, it is recommended to use phase change materials to store the excess thermal energy as a positive and effective approach to solving the energy problems.
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Nattappan, Anbuchezhian, Suganya Priyadharshini Ganesan, Velmurugan Thiagarajan i Krishnamoorthy Ranganathan. "Design of automation control thermal system integrated with parabolic trough collector based solar plant". Thermal Science, nr 00 (2021): 218. http://dx.doi.org/10.2298/tsci201113218n.
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This paper presents enhanced design for Automation control of processes involved in a solar system which utilizes programmable logic controller to automate tracking system for obtaining maximum solar radiation. Three areas are involved in this proposed multi area system where first and second area considers solar power plant with thermal system based parabolic trough collector with fixed solar isolation and random isolation of solar energy whereas third area comprises of solar thermal system with dish Stirling realistic unit. Energy efficiency can be increased by using solar concentrator along with Stirling engine. Optimization of gain of the controller is by utilizing crow search novel algorithm. Crow search algorithm is an optimization technique, which provides better performance at complex time varying noisy condition and time in-varying noisy condition. The Proposed controller is evaluated by obtaining the optimized parameters of the system whose comparison is done by operating proposed controller with & without renewable sources of energy thereby revealing better performance for both conditions. Testing is done in different areas with fixed solar isolation and random stisolation of solar energy involved in solar thermal power plant based on parabolic trough collector. Gain and parameters of the controller of the solar power plant are optimized by utilizing automation for operation of solar concentrator with parabolic Trough collector. Data acquisition and monitoring is done by human machine interface (HMI) in order to report safe operation. The Simulation results of integrated solar thermal system involving dish Stirling with parabolic trough collector, shows that dynamic response of the proposed controller operating with renewable solar energy is better than that of non-renewable energy source.
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Muthu, Gunalan, Subramaniam Shanmugam i Arunachalam Veerappan. "Mathematical Modeling of Thermoelectric Generator with Solar Parabolic Dish". Applied Mechanics and Materials 699 (listopad 2014): 558–63. http://dx.doi.org/10.4028/www.scientific.net/amm.699.558.
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The use of solar energy in the production of electricity is gaining momentum for obvious reasons. This article presents an analytical model of thermoelectric generator (TEG) driven by a solar parabolic dish collector having open mouth diameter of 3.56 m with focal length of 1.11 m. The focal receiver is embedded by flat thermoelectric modules with an absorber plate and it is enclosed in an acrylic cover. TEG with acrylic cover and without acrylic cover were studied analytically for different solar beam radiation at a constant flow rate of heat transfer fluid of water. TEG with acrylic cover system was able to produce 35.3% improvement in overall efficiency and 55.1% improvement in electrical power output at solar beam radiation of 1100W/m2.
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Ma, Hongcai, Guang Jin, Xing Zhong, Kai Xu i Yanjie Li. "Optical Design of a Solar Dish Concentrator Based on Triangular Membrane Facets". International Journal of Photoenergy 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/391921.
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The design of a solar dish concentrator is proposed based on triangular membrane facets for space power applications. The facet concentrator approximates a parabolic surface supported by a deployable perimeter truss structure, which originates from a large aperture space antenna. For optimizing the number of facets rows and focal-diameter ratio of the concentrator, Monte Carlo ray-tracing method is utilized to determine optical performance of the concentrator, and the system root-mean-square (RMS) deviation is considered in this design procedure. A 600-facet concentrator with focal-diameter ratio of 1.1 will achieve 83.63% of radiative collection efficiency over a 15 cm radius disk located in the focal plane, with a mean solar concentration ratio exceeding 300. The study in this paper is helpful for the development of the membrane facet concentrator.
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Muslim, Jusva Agus, i Laode M. Firman. "Studi Simulasi Pengaruh dari Pitch dan Kecepatan Alir Fluida Kerja Terhadap Koefisien Perpindahan Panas Menyeluruh di Conical Cavity Absorber". Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin 10, nr 3 (10.11.2020): 25–31. http://dx.doi.org/10.35814/teknobiz.v10i3.1760.
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The energy crisis has become a global issue that must be resolved immediately through the use of new and renewable energy sources. Indonesia is geographically benefited because it is on the equator so that it gets a supply of sun throughout the year. This advantage is an added value for the application of solar-based energy systems. Concentrated Solar Power (CSP) system is an energy system based on solar thermal energy to generate electricity. The parabolic dish model in CSP has been shown to have the highest efficiency of up to 32%. The fundamental challenge of improving performance on the parabolic dish model is the design of the cavity receiver used. Cavity receiver functions to absorb heat from the reflector and distribute it to the system through the working fluid (Heat Transfer Fluid). This article specifically discusses the simulation of conical cavity receivers with a focus on the effect of pitch and fluid flow velocity in the system through Computational Fluid Dynamic (CFD) ANSYS. Simulation results on nine different variables show the effect of pitch and flow velocity on the overall transfer coefficient on cavity. The results of this simulation can be used as a basic reference in an effort to improve the heat transfer performance of cavity, which in turn can affect the overall performance of a Concentrated Solar Power Parabolic Dish type system.
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Schubnell, M., J. Keller i A. Imhof. "Flux Density Distribution in the Focal Region of a Solar Concentrator System". Journal of Solar Energy Engineering 113, nr 2 (1.05.1991): 112–16. http://dx.doi.org/10.1115/1.2929954.
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In high temperature solar energy applications highly concentrating optical systems, such as, e.g., parabolic dishes, achieve typical radiation flux densities >2 MW/m2. In order to investigate thermo and photochemical reactions at temperatures >1500 K and radiation flux densities >2 MW/m2 a solar furnace was built at Paul Scherrer Institute (PSI). This furnace is a two-stage concentrator. The first stage is a prefocusing glass heliostat with a focal length of 100 m. The second stage is a highly concentrating parabolic dish with a focal length of 1.93 m. To design experiments to be carried out in the focal region of the parabolic dish, the radiation flux as well as its density distribution have to be known. This distribution is usually measured by radiometric methods. However, these methods are generally rather troublesome because of the high temperatures involved. In this paper we present a simple method to estimate the characteristic features of the radiation flux density distribution in the focal region of a concentrator system. It is well known from solar eclipses that the mean angular diameter of the moon is almost equal to that of the sun (9.1 mrad versus 9.3 mrad). Hence, the lunar disk is well suited to be used as a light source to investigate the flux distribution in a solar furnace. Compared to the sun the flux density is reduced by 4·105 and the flux density distribution can be inspected on a sheet of paper located in the plane of interest, e.g., the focal plane. This distribution was photographed and analyzed by means of an image processing system. The density distribution was also simulated using a Monte Carlo ray tracing program. Based on this comparison, and on further ray tracing computations, we show that the peak flux density decreases from 8.9 MW/m2 in December to values below 4 MW/m2 in June and the net radiation flux from 25 kW to 15 kW, respectively.
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Yaseen. H. Mahmood, Abdl majeed.E.IbrahIm i Omar A .jadan. "Design and installation of (flower sun) a concentration dish and study its parameters". Tikrit Journal of Pure Science 22, nr 11 (3.02.2023): 83–86. http://dx.doi.org/10.25130/tjps.v22i11.919.
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Design and installation of (3m) aperture concentration, by using Six curved pieces in the form of parabola Was covered by Aluminum golden mirror, the (focus) at (1.52 m) from the center of parabolic dish, a receiver (boiler) fixed at focus, the concentration ratio (37), we find the heat loss (29.780 W), and the useful energy (1376.93W) and the efficiency of the concentration 60 % at (500-750W/ ) the solar dish suitable for solar application.
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Journal, Baghdad Science. "Construction and Operation of Solar Energy Dish for Water Heating". Baghdad Science Journal 14, nr 4 (3.12.2017): 797–800. http://dx.doi.org/10.21123/bsj.14.4.797-800.
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Construction and operation of (2 m) parabolic solar dish for hot water application were illustrated. The heater was designed to supply hot water up to 100 oC using the clean solar thermal energy. The system includes the design and construction of solar tracking unit in order to increase system performance. Experimental test results, which obtained from clear and sunny day, refer to highly energy-conversion efficiency and promising a well-performed water heating system.
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Kaushika, N. D. "Viability aspects of paraboloidal dish solar collector systems". Renewable Energy 3, nr 6-7 (wrzesień 1993): 787–93. http://dx.doi.org/10.1016/0960-1481(93)90086-v.
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Aljabair, Sattar, Laith Jaafer Habeeb i Ameer mohammed Ali. "Study the Effect of Diameter and Depth of Parabolic Dish Collector on the Concentration Ratio and Temperature Amount of Solar Tower Receiver". Journal of University of Babylon for Engineering Sciences 27, nr 1 (28.01.2019): 142–56. http://dx.doi.org/10.29196/jubes.v27i1.1977.
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This work introduces three models of parabolic dish collectors with different dimension to study the effect of change diameter and depth of the dish on the position of focus point and concentration ratio and the temperature of outlet hot water or steam by using different receivers. The present work deals with a new system consists of dish and receiver to produce hot water and steam from solar energy. The parabolic dish solar collector fabricated from iron with different dimension the first model with diameter (82 cm) and depth (6 cm), this gives focus length (70cm) and Concentration ratio (25.6). The second model with a diameter (100cm) and depth (3 cm), this give focus length (208cm) and concentration ratio (15). The third model with a diameter (150cm) and depth (12cm), This give focus length (100cm) and concentration ratio (399) and the front side covered by nickel sheet metal to focus the solar radiation upon the receiver for all models . Three different shapes of receiver tanks used with the third model ; namely case one which used rectangular receiver tank (100×50×5) cm3 filled with 25 liter of water. Case two used helical copper coil (12.5 mm× 3 m) inside aluminum cylindrical vessel (0.2 m ×0.6 m). Case three used radiator heat exchanger receiver tank (37×47×4) cm3 filled with 3 liter of water. Use low cost and available materials to manufacture the experimental part. The dish, used as part of the solar reflector, covered by several strips of nickel sheet metal. When the parabolic dish collector was operational, the temperature of water was 60 oC in rectangular receiver tank, 75 0C within the copper coil and 125 oC in radiator device receiver. For rectangular receiver tank, hot water obtained within time (2 h), for copper coil receiver tank, hot water obtained within time (30 min) and for radiator heat exchanger receiver, steam obtained within time (20 min).
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Deitz, Don. "FEA Finds a Place in the Sun". Mechanical Engineering 120, nr 08 (1.08.1998): 81–82. http://dx.doi.org/10.1115/1.1998-aug-10.
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This article reviews that finite-element analysis (FEA) is helping engineers optimize emerging solar-energy technologies, so they can meet market demand for lower installation costs and increased production. As producers of electricity investigate ways to meet new and existing demand for power without increasing pollution, more and more utilities—especially those in areas of high solar insolation—are looking more seriously at renewable energy sources, such as solar power. Engineers at Science Applications International Corp.(SAIC), headquartered in San Diego, have developed a parabolic dish system for distributed-receiver applications and central-receiver (power tower) systems, which use a large field of mirrored heliostats. The parabolic dish system is projected to be a promising option worldwide, especially in remote areas that are currently without electricity. The testing at Solar Two will help engineers gain insight into the heliostat’s design, fabrication, installation, performance, and reliability. According to SAIC, this is a key step toward the first 50-megawatt electric power tower plant to be located in the national solar enterprise zone in the southwest desert.
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Cordy, C. "A Strong, Low-Cost Mount for Parabolic Dish Solar Collectors". Journal of Solar Energy Engineering 117, nr 3 (1.08.1995): 205–9. http://dx.doi.org/10.1115/1.2847786.
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This paper presents the design of a cradle for mounting solar energy concentrator dishes. The cradle is strong and provides unobstructed space to mount a well braced dish. It will survive high winds without being driven to a stow position. The axes of rotation of the dish pass near the plane of the edge of the dish to reduce wind-induced torques in the drive system. Large radius tracks are attached to both the dish and cradle so the gear train on the drive motors can be simple and inexpensive. The cradle is a strong gimbal mount built of 12 structural members in the form of three tetrahedra. It provides a polar axis mount for the concentrator dish. All forces parallel to the polar axis are delivered to the earth at the end of the cradle closest to the equator.
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Shanmugam, S., i W. Christraj. "The Tracking of the Sun for Solar Paraboloidal Dish Concentrators". Journal of Solar Energy Engineering 127, nr 1 (1.02.2005): 156–60. http://dx.doi.org/10.1115/1.1824103.
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Paraboloidal dish concentrators need tracking the sun in the east-west and north-south direction continuously throughout the year. But this paper explains the method of intermittent tracking of the sun in the north-south direction with no tracking in the east-west direction for less energy yield. The frequency of tracking in the north-south direction is determined by the relationship between the variation in solar altitude angle and the size of the absorber in the Paraboloidal dish concentrator. A computer program in Visual BASIC is written to enable the detailed calculations of data for the analysis.© 2004 American Institute of Physics.
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Schubnell, M. "Sunshape and Its Influence on the Flux Distribution in Imaging Solar Concentrators". Journal of Solar Energy Engineering 114, nr 4 (1.11.1992): 260–66. http://dx.doi.org/10.1115/1.2930015.
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Imaging solar concentrators, such as a parabolic dish, image the sun to their focal plane. Thus, the flux distribution is basically an image of the angular distribution of the direct incident solar radiation. This distribution, referred to as sunshape, is determined by solar limb darkening and by small angle scattering in the atmosphere. In this paper we present measurements of the sunshape and investigate its influence on the flux distribution in the solar furnace at Paul Scherrer Institute (PSI) and in parabolic concentrators, both experimentally and by a ray tracing procedure. Analyzing the influence of the spectral dependence of the sunshape we find that the characteristic width of the focal spot increases with longer wavelengths. In contrary, the mean concentration ratio is higher at shorter wavelengths. Although these effects are rather small, they can be important in radiometric measurement techniques to determine the emissivity and the temperature distribution of an irradiated sample as well as in designing solar pumped lasers. Comparing various sunshapes with the corresponding flux distributions in the two-stage solar furnace at PSI, we show that the influence of the circumsolar radiation on the flux distribution is usually negligible as compared to the distortion due to astigmatism. However, in more accurate optical systems, such as highly concentrating parabolic dishes, the flux distribution is a fairly accurate image of the sunshape. We find, that due to sunshape, the mean concentration ratio in a parabolic dish is decreased by about ten percent. As an example we subsequently estimate the mean annual conversion efficiency of an ideal solar converter operated in the Swiss mountains.
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Eswaramoorthy, M., S. Shanmugam i AR Veerappan. "Experimental Study on Solar Parabolic Dish Thermoelectric Generator". International Journal of Energy Engineering 3, nr 3 (5.06.2013): 62–66. http://dx.doi.org/10.5963/ijee0303001.
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Eswaramoorthy, M., i S. Shanmugam. "Solar Parabolic Dish Thermoelectric Generator: A Technical Study". Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 35, nr 5 (marzec 2013): 487–94. http://dx.doi.org/10.1080/15567036.2010.504945.
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Eswararmoorthy, M., i S. Shanmugam. "Thermodynamic analysis of solar parabolic dish thermoelectric generator". International Journal of Renewable Energy Technology 1, nr 3 (2010): 348. http://dx.doi.org/10.1504/ijret.2010.032188.
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Muthu, G., S. Shanmugam i A. R. Veerappan. "Solar Parabolic Dish Thermoelectric Generator with Acrylic Cover". Energy Procedia 54 (2014): 2–10. http://dx.doi.org/10.1016/j.egypro.2014.07.244.
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Dai, Qing Hui, i Jin Jiang. "Material and Manufacturing of the Key Part of Dish Solar Thermal Power Generation Device". Advanced Materials Research 630 (grudzień 2012): 260–64. http://dx.doi.org/10.4028/www.scientific.net/amr.630.260.
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The solar thermal power generation is an important direction in the use of new energy. With the parabolic dish as the object of research, we analyzed its structure,material and forming method. According to the TRIZ theory, we researched and designed its processing technique. The parabolic dish’s manufacturing and processing scheme is showed in the end.
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Al-Tahaineh, Hamza. "Performance Investigation of a Concentrated Solar Dish for Heating Applications". Issue 1 6, nr 1 (1.04.2023): 1–6. http://dx.doi.org/10.48103/jjeci612023.
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Concentrated collectors offer a broad variety of solar energy uses, including heating, cooling, power production, and water desalination. This study was conducted to construct and test a concentrated parabolic solar dish water heater. The aperture size of the dish is 4.556m2 , and a copper absorber has a surface area of 0.2278m2 , a volume of 0.015m3 , and a concentrating ratio of 20. The water is heated up to 120°C at a solar radiation intensity of 700W/m2 and a 20°C ambient temperature. The absorber's stagnation temperature reached 246°C in roughly 1500 seconds. The thermal efficiency of the system was found to be 46%.
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Loganathan, Vijayaraja, Dhanasekar Ravikumar, Rupa Kesavan, Kanakasri Venkatesan, Raadha Saminathan, Raju Kannadasan, Mahalingam Sudhakaran, Mohammed H. Alsharif, Zong Woo Geem i Junhee Hong. "A Case Study on Renewable Energy Sources, Power Demand, and Policies in the States of South India—Development of a Thermoelectric Model". Sustainability 14, nr 14 (20.07.2022): 8882. http://dx.doi.org/10.3390/su14148882.
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This work aims to perform a holistic review regarding renewable energy mix, power production approaches, demand scenarios, power policies, and investments with respect to clean energy production in the southern states of India. Further, a thermoelectric-generator model is proposed to meet rural demands using a proposed solar dish collector technology. The proposed model is based on the idea of employing a parabolic concentrator and a thermoelectric (TE) module to generate electricity directly from the sun’s energy. A parabolic dish collector with an aperture of 1.11 m is used to collect sunlight and concentrate it onto a receiver plate with an area of 1.56 m in the proposed TE solar concentrator. The concentrated solar thermal energy is converted directly into electrical energy by using a bismuth telluride (BiTe)-based TE module mounted on the receiver plate. A rectangular fin heatsink, coupled with a fan, is employed to remove heat from the TE module’s cool side, and a tracking device is used to track the sun continuously. The experimental results show considerable agreement with the mathematical model as well as its potential applications. Solar thermal power generation plays a crucial part in bridging the demand–supply gap for electricity, and it can be achieved through rural electrification using the proposed solar dish collector technology, which typically has a 10 to 25 kW capacity per dish and uses a Stirling engine to generate power. Here the experimentation work generates a voltage of 11.6 V, a current of 0.7 A, and a power of 10.5 W that can be used for rural electrification, especially for domestic loads.