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Energy and Exergy Analysis and Optimization of a Heat Sink Collector Equipped with Rotational Obstacles | ||
| AUT Journal of Mechanical Engineering | ||
| مقاله 4، دوره 2، شماره 1، شهریور 2018، صفحه 39-50 اصل مقاله (1.47 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2017.12960.5486 | ||
| نویسندگان | ||
| A.A. Abbasian Arani* 1؛ S. Sadripour2؛ S. Kermani1 | ||
| 1Department of Mechanical Engineering, University of Kashan, Kashan, Iran | ||
| 2Department of Mechanical Engineering, University of Kashan, Kashan, Iran Faculty of Mechanical Engineering, University of Shahreza, Shahreza, Iran | ||
| چکیده | ||
| In this paper, the forced convection flow in a heat sink collector equipped with stationary and rotational obstacles is studied numerically. Three-dimensional governing equations are solved by control volume approach based on the SIMPLE algorithm and k.. turbulence model. Reynolds numbers are considered in the laminar-turbulent range of 50 < Re < 12,000. The optimization was carried out by variation of related parameters. It is concluded that using heat sink, instead of a customary instrument, increases the outlet temperature from the collector and exergy efficiency due to longer installing of the fluid inside the collector. Also, it is realized that using the stationary and rotational obstacles enhance the outlet fluid temperature (about 2.5°C), energy efficiency and exergy efficiency. Nevertheless, using the rotational obstacles is more effective than the stationary obstacles. While the trend of exergy efficiency variation with effective parameters is increasing, applying the obstacles precipitates the efficiency increment (from 4% to 5.3%). In addition, for the case that the trend of exergy efficiency variation by changing these parameters is decreasing, the decreasing trend gets slow. There is a unique mass flow rate (0.005 kg/s) that the exergy efficiency gets a maximum value and for the higher mass flow rates, the efficiency decreases slightly and then remains unchanged. | ||
| کلیدواژه‌ها | ||
| Heat sink collector؛ Rotational obstacles؛ Exergy optimization؛ forced convection؛ Radiation | ||
| مراجع | ||
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[1] S. A. Kalogirou, Solar thermal collectors and applications. Progress in Energy and Combustion Science, 30(3) (2004) 31-95. [2] M. Ansari, M. Bazargan, Optimization of Heat transfer and Pressure Drop in a Solar Air Heater with Ribbed Surface. Amirkabir Journal of Mechanical Engineering, 49(1) (2017) 137-146. [3] Z. Poolaei Moziraji, A. Azimi, S. Kazemzadeh Hannani, M. Najafi, Simultaneous Estimation of Thermophysical Properties and Convective Boundary Conditions of a Sample Room in Tehran Using Inverse Analysis. Amirkabir Journal of Mechanical Engineering, 49(1) (2017) 147-160. [4] H. Jahani, A. Abbassi, M. Kalteh, M. Azimifar, Semi-Analytic Solution of Nanofluid and Magnetic Field Effects on Heat Transfer from a Porous Wall. Amirkabir Journal of Mechanical Engineering, 49(1) (2017) 161-170. [5] H. Khorasanizadeh, A. Aghaei, H. Ehteram, A. Azimi, Study and Exergy Optimization of a Flat Plate Solar Collector in a Closed Circuit Utilized with Reflectors and Lenses Using Experimental Results. Journal of Energy Engineering Management, 3(1) (2013) 40-51. [6] M. A. Leon, S. Kumar, Mathematical modeling and thermal performance analysis of unglazed transpired solar collectors. Solar Energy, 81 (2007) 62-75. [7] S. Motahar, A. A. Alemrajabi, An analysis of unglazed transpired solar collectors based on exergetic performance criteria. International Journal of Thermodynamics, 13(4) (2010) 153-160. [8] C. F. Kutscher, C. B. Christensen, G. M. Barker, Unglazed transpired solar collectors: heat loss theory. Journal of Solar Energy Engineering, 115 (1993) 182-188. [9] C. Yildiz, I. T. Torgrul, C. Sarsilmaz, D. Pehlivan, Thermal efficiency of an air solar collector with extended absorption surface and increased convection. International Communication in Heat and Mass Transfer, 29(6) (2002) 831-840. [10] P. T. Tsilingiris, Heat transfer analysis of low thermal conductivity solar energy absorbers. Applied Thermal Engineering, 20 (2000) 1297-1314. [11] N. M. Khattab, Evaluation of perforated plate solar air heater. International Journal of Solar Energy, 21 (2000) 45-62. [12] D. Njomo, M. Daguenet, Sensitivity analysis of thermal performances of flat plate solar air heaters. Heat and Mass Transfer, 42 (2006) 1065-1081. [13] A. Sarreshtedari, A. Zamani Aghaee, Investigation of the thermo-hydraulic behavior of the fluid flow over a square ribbed channel. Journal of Heat and Mass Transfer Research, 1(2) (2014) 101-106. [14] Z. Baniamerian, R. Mehdipour, F. Kargar, A numerical investigation on aerodynamic coefficients of solar troughs considering terrain effects and vortex shedding. International Journal of Engineering (IJE), Transactions C: Aspects, 28(6) (2015) 940-948. [15] B. M. Ziapour, F. Rahimi, Numerical study of natural convection heat transfer in a horizontal wavy absorber solar collector based on the second law analysis. International Journal of Engineering (IJE), Transactions A: Basics, 29(1) (2016) 109-117. [16] K. Ajay, L. Kundan, Performance evaluation of nanofluid (Al2O3/H2O–C2H6O2) based parabolic solar collector using both experimental and CFD techniques. International Journal of Engineering (IJE), Transactions A: Basics, 29(4) (2016) 572-580. [17] I. Luminosu, L. Fara, Determination of the optimal operation mode of a flat solar collector by exergetic analysis and numerical simulation. Energy, 30(12) (2005) 731-747. [18] E. Shojaeizadeh, F. Veysi, Development of a correlation for parameter controlling using exergy efficiency optimization of an Al2O3/water nanofluid based flat-plate solar collector. Applied Thermal Engineering, 98 (2016) 1116-1129. [19] Z. Said, R. Saidur, N. A. Rahim, Energy and exergy analysis of a flat plate solar collector using different sizes of aluminum oxide based nanofluid. Journal of Cleaner Production, 133 (2016) 518-530.
[20] S. M. Vanaki, H. A. Mohammed, A. Abdollahi, M. A. Wahid, Effect of nanoparticle shapes on the heat transfer enhancement in a wavy channel with different phase shifts. Journal of Molecular Liquids, 196 (2014) 32-42.
[21] D. D. Gray, A. Giorgini, The validity of the Boussinesq approximation for liquids and gases. International Journal of Heat and Mass Transfer, 19(5) (1976) 545-551.
[22] A. Bejan, Convection heat transfer. Wiley-Interscience (1984).
[23] ANSYS Fluent-Solver Theory Guide, Release 14.0 (2011) 351-353.
[24] J. A. Duffie, W. A. Beckman, Solar engineering of thermal processes. New York, John Wiley & Son (2006).
[25] Mechanical Agitator Power Requirements for Liquid, www.pdhonline.com/courses/k103/k103content.pdf
[26] A. Suzuki, General theory of exergy balance analysis and application to solar collectors. Energy, 13(2) (1988) 123-160.
[27] A. Bejan, D. W. Keary, F. Kreith, Second law analysis and synthesis of solar collector systems. Journal of Solar Energy Engineering, 103(1) (1981) 23-28.
[28] A. Bejan, 1Advanced Engineering Thermo-dynamics. New York, Wiley Inter science (1988).
[29] K. K. Dutta Gupta, S. Saha, Energy analysis of solar thermal collectors. Renewable energy and environment, 33(1) (1990) 283-287.
[30] A. Kahrobaian, H. Malekmohammadi, Exergy optimization applied to linear parabolic solar collectors. Journal of Faculty of Engineering, 42(1) (2008) 131-144.
[31] A. A. Abbasian Arani, S. Sadripour, S. Kermani, Nanoparticle shape effects on thermal-hydraulic performance of boehmite alumina nanofluids in a sinusoidal–wavy mini-channel with phase shift and variable wavelength. International Journal of Mechanical Sciences, 128–129 (2017) 550-563.
[32] S. Sadripour, M. Adibi, G. A. Sheikhzadeh, Two Different Viewpoints about using Aerosol-Carbon Nanofluid in Corrugated Solar Collectors: Thermal-Hydraulic Performance and Heating Performance, Global Journal of Researches in Engineering A: Mechanical and Mechanics, 17(5) (2017) 19-36.
[33] H. Khorasanizadeh, S. Sadripour, A. Aghaei, Numerical Investigation of Thermo-Hydraulic Characteristics of Corrugated Air-Heater Solar Collectors, Modares Mechanical Engineering, 16(13) (2016) 42-46. | ||
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