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شبیه‌‌سازی عددی استخر خورشیدی گرادیان نمک با استفاده از تابع تخمین شدت تابش خورشیدی به همراه اثر سایه دیوارها | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| مقاله 18، دوره 53، شماره 5 (Special Issue)، مرداد 1400، صفحه 3385-3400 اصل مقاله (1.94 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2020.17286.6563 | ||
| نویسندگان | ||
| جواد امینی فروشانی1؛ علی اکبر عباسیان آرانی* 1؛ محمد گندمکار2 | ||
| 1دانشکده مهندسی مکانیک، دانشگاه کاشان، کاشان، ایران | ||
| 2مجتمع دانشگاهی مکانیک، دانشگاه صنعتی مالک اشتر، اصفهان، ایران | ||
| چکیده | ||
| در این تحقیق تابع تخمین تابش خورشیدی بر اساس جرم هوا و آمار روزهای آفتابی و ابری جهت استفاده در مدل‌‌سازی عددی استخرهای خورشیدی معرفی شده است. استخرهای خورشیدی یکی از روش‌‌های جذب تابش خورشیدی و ذخیره‌سازی آن به صورت حرارت با دوره‌‌های ذخیره طولانی‌‌مدت می‌‌باشند. این تحقیق با کد شبیه‌‌سازی یک‌بعدی، نسبت به تحلیل عملکرد حرارتی استخرهای خورشیدی گرادیان نمک اقدام می‌‌نماید. در مدل‌‌سازی عددی با حذف فرضیات معمول، شرایط محیطی به صورت واقعی‌‌تر لحاظ شده‌‌اند. این شرایط دمای محیط متغیر برحسب روز و ساعت، تابعیت خواص محلول آب و نمک از دما و غلظت، متغیر شدت تابش بر حسب زاویه فراز خورشید و تاثیر سایه دیوارها در استخر بوده است. تحلیل گذرا انجام شده و شرایط روز و شب لحاظ شده‌‌اند. نوآوری روش مورد استفاده، مربوط به تخمین شدت تابش خورشیدی با استفاده از مفهوم جرم هوا و مقدار ابری‌بودن آسمان بوده است. رابطه‌‌ای نوین جهت محاسبه فاکتور پوشش ابر ارائه نموده، که از آمار روزهای ابری و نیمه ابری محل وقوع استخر استخراج گردیده و شدت تابش با میزان اندازه‌‌گیری‌شده تجربی مقایسه شده است. شدت تابش بدست‌آمده در مدل‌‌سازی عددی استخر خورشیدی مورد تحقیق با نتایج تجربی موجود تطابق خوبی دارد. | ||
| کلیدواژه‌ها | ||
| استخر خورشیدی؛ شبیه‌‌سازی عددی؛ تخمین شدت تابش؛ سیستم ذخیره انرژی؛ انرژی خورشیدی | ||
| عنوان مقاله [English] | ||
| Numerical simulation of salt gradient solar pond by employing the solar radiation estimating function considering wall-shading effects | ||
| نویسندگان [English] | ||
| Javad Amini Froshani1؛ Ali Akbar Abbasian Arani1؛ Mohammad Gandomkar2 | ||
| 1Mechanical Engineering Department, University of Kashan, Kashan, Iran | ||
| 2Faculty of Mechanics, Malek Ashtar University of Technology, Iran | ||
| چکیده [English] | ||
| In this study, a function for estimating solar radiation has been proposed using air mass effects and annual statistics of daylight conditions. A new relation for calculating the cloud cover factor has been provided by using the annual statistics of clear sky, partially cloudy, and overcast days. Estimated solar radiations have been compared with the measured experimental ones for two cities in Iran, and a good agreement has been observed. The proposed function can be used at places where the facilities and required instruments for solar radiation measurement are not available. As an illustration, the function has been used in numerical simulations of salt gradient solar ponds. One dimensional thermal analyses of the salt gradient solar ponds have been performed through an in-house code, which models the various parameters. Variation of environmental temperature, solar radiation intensity based on zenith angle of the sun, saline properties as a function of temperature and concentration, and wall-shading effects are among those parameters. A fair agreement has been observed between the results of the slat gradient solar pond numerical simulations and the experimentally measured temperatures, which shows the capability of the proposed function for estimating the solar radiation correctly. | ||
| کلیدواژه‌ها [English] | ||
| Solar radiation, Solar energy, Solar pond, Air mass, Cloud cover factor | ||
| مراجع | ||
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[1] K. Sukhatme, S.P. Sukhatme, Solar energy: principles of thermal collection and storage, Tata McGraw-Hill Education, 1996. [2] A. Rabl, C.E. Nielsen, Solar ponds for space heating, Solar Energy, 17(1) (1975) 1-12. [3] J. Andrews, A. Akbarzadeh, Enhancing the thermal efficiency of solar ponds by extracting heat from the gradient layer, Solar Energy, 78(6) (2005) 704-716. [4] H. Tabor, Solar ponds, Solar Energy, 27(3) (1981) 181-194. [5] H. Tabor, Solar ponds as heat source for low-temperature multi-effect distillation plants, Desalination, 17(3) (1975) 289-302. [6] H. Tabor, R. Matz, A status report on a solar pond project, Solar Energy, 9(4) (1965) 177-182. [7] A. Akbarzadeh, G. Ahmadi, Computer simulation of the performance of a solar pond in the southern part of Iran, Solar Energy, 24(2) (1980) 143-151. [8] Y. Wang, A. Akbarzadeh, A parametric study on solar ponds, Solar Energy, 30(6) (1983) 555-562. [9] F. Zangrando, On the hydrodynamics of salt-gradient solar ponds, Solar Energy, 46(6) (1991) 323-341. [10] F. Zangrando, A simple method to establish salt gradient solar ponds, Solar Energy, 25 (1980) 467-470. [11] C. Angeli, E. Leonardi, A one-dimensional numerical study of the salt diffusion in a salinity-gradient solar pond, International journal of heat and mass transfer, 47(1) (2004) 1-10. [12] J.R. Hull, Computer simulation of solar pond thermal behavior, Solar Energy, 25(1) (1980) 33-40. [13] M. Karakilcik, I. Dincer, I. Bozkurt, A. Atiz, Performance assessment of a solar pond with and without shading effect, Energy conversion and management, 65 (2013) 98-107. [14] I. Bozkurt, M. Karakilcik, The effect of sunny area ratios on the thermal performance of solar ponds, Energy Conversion and Management, 91 (2015) 323-332. [15] M.R. Jaefarzadeh, Thermal behavior of a small salinity-gradient solar pond with wall shading effect, Solar Energy, 77(3) (2004) 281-290. [16] M. Aramesh, A. Kasaeian, F. Pourfayaz, D. Wen, Energy analysis and shadow modeling of a rectangular type salt gradient solar pond, Solar Energy, 146 (2017) 161-171. [17] P.P.P.T.A. SOLAR, S. ONE-DIMENSIONAL, Dehghan A.A., Amini J., in: Fourth Int. Conf. on Energy Research & Development, Kuwait, 2008. [18] M. Khalilian, Experimental and numerical investigations of the thermal behavior of small solar ponds with wall shading effect, Solar Energy, 159 (2018) 55-65. [19] R. Brinsfield, M. Yaramanoglu, F. Wheaton, Ground level solar radiation prediction model including cloud cover effects, Solar energy, 33(6) (1984) 493-499. [20] A.A. Dehghan, A. Movahedi, M. Mazidi, Experimental investigation of energy and exergy performance of square and circular solar ponds, Solar energy, 97 (2013) 273-284. [21] I. Bozkurt, M. Karakilcik, Exergy analysis of a solar pond integrated with solar collector, Solar Energy, 112 (2015) 282-289. [22] M. Khalilian, Exergetic performance analysis of a salinity gradient solar pond, Solar Energy, 157 (2017) 895-904. [23] K. Ranjan, S. Kaushik, Exergy analysis of the active solar distillation systems integrated with solar ponds, Clean Technologies and Environmental Policy, 16(5) (2014) 791-805. [24] M. Mazidi, M.H. Shojaeefard, M.S. Mazidi, H. Shojaeefard, Two-dimensional modeling of a salt-gradient solar pond with wall shading effect and thermo-physical properties dependent on temperature and concentration, Journal of Thermal Science, 20(4) (2011) 362-370. [25] A.A. Sabziparvar, H. Shetaee, Estimation of global solar radiation in arid and semi-arid climates of East and West Iran, Energy, 32(5) (2007) 649-655. [26] J. Almorox, C. Hontoria, Global solar radiation estimation using sunshine duration in Spain, Energy Conversion and Management, 45(9-10) (2004) 1529-1535. [27] F. Kasten, A.T. Young, Revised optical air mass tables and approximation formula, Applied optics, 28(22) (1989) 4735-4738. [28] A.T. Young, Air mass and refraction, Applied optics, 33(6) (1994) 1108-1110. [29] T. Muneer, M. Gul, Evaluation of sunshine and cloud cover based models for generating solar radiation data, Energy Conversion and Management, 41(5) (2000) 461-482. [30] S. Owczarek, Vector model for calculation of solar radiation intensity and sums incident on tilted surfaces. Identification for the three sky condition in Warsaw, Renewable Energy, 11(1) (1997) 77-96. [31] K. Kimura, D.G. Stephenson, Solar radiation on cloudy days, ASHRAE J., 75 (1969). [32] D. Cano, J.-M. Monget, M. Albuisson, H. Guillard, N. Regas, L. Wald, A method for the determination of the global solar radiation from meteorological satellites data, Solar energy, 37(1) (1986) 31-39. [33] S. Rangarajan, M. Swaminathan, A. Mani, Computation of solar radiation from observations of cloud cover, Solar Energy, 32(4) (1984) 553-556. [34] M. Mohandes, A. Balghonaim, M. Kassas, S. Rehman, T. Halawani, Use of radial basis functions for estimating monthly mean daily solar radiation, Solar Energy, 68(2) (2000) 161-168. [35] J. Sabbagh, A. Sayigh, E. El-Salam, Estimation of the total solar radiation from meteorological data, Sol. Energy;(United States), 19(3) (1977). [36] J.E. Hay, Calculation of monthly mean solar radiation for horizontal and inclined surfaces, Solar energy, 23(4) (1979) 301-307. [37] H. Ögelman, A. Ecevit, E. Tasdemiroǧlu, A new method for estimating solar radiation from bright sunshine data, Solar Energy, 33(6) (1984) 619-625. [38] J.A. Duffie, W.A. Beckman, Solar energy thermal processes, University of Wisconsin-Madison, Solar Energy Laboratory, Madison, WI, 1974. [39] R. Burlon, S. Bivona, C. Leone, Instantaneous hourly and daily radiation on tilted surfaces, Solar Energy, 47(2) (1991) 83-89. [40] W.C. Dickinson, P.N. Cheremisionoff, Solar energy technology, Handbook Part A, 498 (1980). [41] H. Bryant, I. Colbeck, Solar pond for London.[For space heating of houses], Sol. Energy;(United States), 19(3) (1977). [42] P. Würfel, U. Würfel, Physics of solar cells: from basic principles to advanced concepts, John Wiley & Sons, 2009. [43] E. Schoenberg, Theoretische Photometrie, in: Grundlagen der Astrophysik, Springer, 1929, pp. 1-280. [44] E. Laue, The measurement of solar spectral irradiance at different terrestrial elevations, Solar Energy, 13(1) (1970) 43-57. [45] K.Y. Kondretyev, Radiation in the Atmospheres, Using results of Berland, Academic Press, New York, 1969. [46] M.A. Atwater, J.T. Ball, A surface solar radiation model for cloudy atmospheres, Monthly weather review, 109(4) (1981) 878-888. [47] F. Kasten, G. Czeplak, Solar and terrestrial radiation dependent on the amount and type of cloud, Solar energy, 24(2) (1980) 177-189. [48] M. Atwater, J. Ball, Effects of clouds on insolation models, Solar Energy, 27(1) (1981) 37-44. [49] F. Quinlan, SOLMET Volume 2: Hourly Solar Radiation—Surface Meteorological Observations, National Oceanic and Atmospheric Administration, Asheville, NC, (1979). [50] IRIMO, I.R. Iran, Meteorologiacal Organizationm, in, https://www.irimo.ir/eng/index.php, 2018. [51] J. Amini, A.A. Dehghan, The Influence of Shape and Orientation on Thermal Performance of a Salt Gradient Solar Pond, in: 16rd Annual international conference of mechanical engineering (ISME2008), Kerman, Iran., 2008. (in persian) [52] J.A. Duffie, W.A. Beckman, Solar engineering of thermal processes, John Willey & Sons, New York, (1980). [53] J.S. Hsieh, Solar energy engineering, (1986). [54] P. Cooper, The absorption of radiation in solar stills, Solar energy, 12(3) (1969) 333-346. [55] R. Kayali, S. Bozdemir, K. Kiymac, A rectangular solar pond model incorporating empirical functions for air and soil temperatures, Solar Energy, 63(6) (1998) 345-353. [56] D.W. Kaufmann, Sodium chloride: the production and properties of salt and brine, (1960). [57] J.H. Perry, Chemical engineers' handbook, in, ACS Publications, 1950. | ||
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