Thermal Efficiency of a Hybrid Photovoltaic-thermal Chimney Integrated into a Building
American Journal of Modern Physics
Volume 8, Issue 4, July 2019, Pages: 50-65
Received: Aug. 12, 2019;
Accepted: Sep. 2, 2019;
Published: Sep. 19, 2019
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Yawovi Nougbléga, Laboratory on Solar Energy, Group of Energetic and Transfer Phenomenon, University of Lomé, Lomé, Togo
Kodjo Kpode, Laboratory on Solar Energy, Group of Energetic and Transfer Phenomenon, University of Lomé, Lomé, Togo
Kokou N’Wuitcha, Laboratory on Solar Energy, Group of Energetic and Transfer Phenomenon, University of Lomé, Lomé, Togo
Malgolmèèna Banna, Laboratory on Solar Energy, Group of Energetic and Transfer Phenomenon, University of Lomé, Lomé, Togo
The solar photovoltaic-thermal energy, it is a combination of Photovoltaic (PV) and solar thermal components integrated into one system and enables to generate electricity and heat simultaneously. The solar chimney can generate air flow through the living space of the building to provide cooling. Hence, there is a greater interest to study the mixed convection in the hybrid Photovoltaic-Thermal chimney integrated into buildings for natural room ventilation for thermal comfort. The thermal efficiency has been studied by analysing numerically the mixed convection in the hybrid photovoltaic-thermal chimney integrated into the building in the present paper. The stream fucntion-vorticity formulation with a finite difference numerical discretization solution scheme have been adopted. The system of algebraic governing equations is solved by Thomas algorithm method. The aim of the present paper is to study and to predict the dynamic fields and particularly of the mass flow rate of the air thermosiphon drawing in the hybrid Photovoltaic-Thermal chimney integrated into a building for passive cooling in the room. The effects of the governing parameters, particularly Grashof number (103 ≤ Gr ≤ 106), that depends of the solar radiation intensity in the region, the mass flow rate of the inlet fresh air (0.001 Kg.s-1 ≤ Dm ≤ 0.3Kg.s-1), the integrated chimney width on fluid flow and the heat transfer characteristics are studied in detail. Passive cooling and the electrical efficiency of the PV solar cells are increasing function of the intensity of the inlet air flow. Due to the possible reduction of cooling loads with the insertion of the photovoltaic cells plate into the chimney integrated into the building. The numerical simulation has been conducted to determine heat transfer, mass flow rate trough the chimney exit, solar cells PV efficiency and the effect of design parameters of the room and the integrated hybrid Photovoltaic-Thermal chimney to make the bioclimatic building energy autonomy. The outlet velocity, streamlines, isotherms, Nusselt number along the active walls, and the mass flow rate are plotted versus the above controlling parameters.
Thermal Efficiency of a Hybrid Photovoltaic-thermal Chimney Integrated into a Building, American Journal of Modern Physics.
Vol. 8, No. 4,
2019, pp. 50-65.
Byrne P, Miriel J, Lenat Y (2012). Modelling and simulation of a heat pump for simultaneous heatingand cooling. Building Simulation, 5: PP 219–232.
Nougblega, Ya. M. Banna, K. Napo, Thermal performances of hybrid photovoltaic/thermal collector designed for natural air updraught cooling into buildings in tropics, International Scientific Journal for Alternative Energy and Ecology № 11 (91) 2010, PP, 52-59.
Hussain F., M. Y. H. Othman, K. Sopian, B. Yatim, H. Ruslan, H. Othman, Design development and performance evaluation of photovoltaic/thermal (PV/T) air base solar collector, Renewable and Sustainable Energy Reviews 25 (2013) 431–441.
Brinkworth, B. J., Cross, B. M., Marshall, R. H., and Yang, H. X. (1997) Thermal Regulation of Photovoltaic Cladding, Solar Energy, 61 (3), pp. 169-178.
Yang, H. X., Marshall, R. H. and Brinkworth, B. J. (1996) Validated Simulation for Thermal Regulation of Photovoltaic Wall Structures, 25th PVSC, May 13-17, Washington, D. C., pp. 1453-1456.
Raji, A., Hasnaoui, M., 1998a. Mixed convection heat transfer in a rectangular cavity ventilated and heated from the side. Numer. Heat Transer part A 33, PP 533, 548.
Chen, Z. D., P. Bandopadhayay, J. Halldorsson, C. Byrjalsen, P. Heiselberg and Y. Li, 2003. An experimental investigation of solar chimney model with uniform wall heat flux. Building and Environment 38, pp. 893-906.
Nougblega Ya., H. A. Samah, M. Banna K. Napo (2011). Numerical investigation of mixed convection from a heat generating PV cells in ventilated hybrid photovoltaic/thermal collector. International Scientific Journal for Alternative Energy and Ecology № 12 (92) 2010. PP 15-24.
Santamouris M., Kolokotsa D. (2013). Passive cooling dissipation techniques for buildings and other structures: The state of the art. Energy and Buildings, 57: PP 74–94.
Mohammad Sameti, Alibakhsh Kasaeian, (2015). Numerical simulation of combined solar passive heating and radiative cooling for a building, BUILD SIMUL (2015) 8: 239–253.
Oosthuizen, P. H., Paul, J. T., 1985. Mixed convective heat transfer in a cavity. ASME HTD 42, PP 159-169.
Raji, A., Hasnaoui, M., 1998b. Corrélations en convection mixte dans les cavités ventilées. Revue Générale de Thermique 37, PP 874-884.
Raji, A., Hasnaoui, M., 2000. Mixed convection heat transfer in ventilated cavities with opposing and assisting flows. Eng. Comput. Int. J. Co mput. – Aided Eng. Softw. 17, PP 556-572.
Manca, O., Nardini, S., Khanafer, K., Vafai, K., 2003. Effect of heated wall position on mixed convection in a channel with an open cavity. Numer. Heat Transfer part A 23, 463-484
Singh, S. Sharif, M. A. R., 2003. 2003. Mixed convective cooling of a rectangular cavity with inlet and exit openings on differentially heated side walls. Numer. Heat transfer Part A 44, PP 223-253.
Chan HY, Riffat SB, Zhu J (2010). Review of passive solar heating and cooling technologies. Renewable and Sustainable Energy Reviews, 14: PP 781–789.
Hegazy A. A., Comparative study of the performances of four photovoltaic/thermal solar air collectors, Energy Conversion and Management 41 (2000) 861–881.
Huang B. J., T. H. Lin, W. C. Hung, F. S. Sun, Performance evaluation of solar photovoltaic/thermal systems, Solar Energy 70 (5) (2001) 443–448.
Henning HM, Doll J (2012). Solar systems for heating and cooling of buildings. Energy Procedia, 30: PP 633–653.
Mousavi S. S., and Hooman K. (2006). Heat and fluid flow in entrance region of a channel with staggered baffles. Energ Conversion and management 47, PP 2011-2019.
Sameti M. (2014). Electrical energy efficient building through distributed generation. International Journal of Renewable Energy Research, 4: PP 777–783.
Tripanagnostopoulos, Y. T. H.. Nousia, M. Souliotis, P. Yianoulis, Hybrid photovoltaic/thermal solar systems, Solar Energy 72 (3) (2002) 217–234.
Bergene, T., O. Lovik, Model calculations on a flat-plate solar heat collector with integrated solar cells, Solar Energy 55 (6) (1995) 453–462.
Krauter S., R. Hanitshch. Actual optical and thermal performance of PV-modules Solar Energy materials and Solar Cells 41-42, (1996). PP 557-574.
Woods L. C., A note of numerical solution of fourth differential equations, Aero. Q. 5 (1954) 176-184.
Wam, D. C., B. S. U. Patmaik and G. W. Wei (2001). A new benchmark quality solution for the buoyancy driven cavity by discrete singular convolution. Numerical Heat Transfert, Part B. 40. PP 199-228.
Sandberg M., Mosfegh, B. (1996b). Investigation of fluid flow and Heat Transfer in a Vertical Channel heated from one side by PV elements, part 1. Numerical study, Renewable Energy, PP. 248-53.
Mei, L. David Infield, Eicker, U, Fuxv. (2002). Thermal modeling of a building with an integrated ventilated PV façade. Energy and Buildings, Vol. 35, PP 605-617.
Manca O., S. Nardini, (2007). Experimental investigation on natural convection in horizontal channels with the upper wall at uniform heat flux. International Journal of heat and mass Transfer, Vol. 50, pp. 1075-1086.
Bilgen, E., T. Yamane, conjugate heat transfer in enclosures with openings for ventilation. Heat and Mass Transfer, Vol. 40, pp. 401-4011, 2004.