Numerical study of an air plane solar collector with the baffle in zigzag form

• Autorzy: Guendouz N. , Bibi-Triki N. , Didi F. , Zidani C.

Identyfikatory

DOI

10.1515/aoter-2018-0034

• Języki publikacji: EN

Abstrakty

EN

The production of thermal energy from solar energy by flat collectors finds nowadays many applications due to their innumerable economic and environmental interests. Currently, conservation of energy resources has become a global priority. On the other hand, given the dizzying demand for energy, has led specialists to find new techniques, such as renewable energies (solar, wind and geothermal). The present work is a contribution, by numerical simulation, to the study of heat transfer in flat solar collectors. On the basis of some experimental data, several simulation calculations have been carried out in order to determine the influencing parameters allowing better performance of the sensors and ensuring a good homogeneity of the temperature distributions. Based on the observation that, due to the low thermophysical properties of the air used as heat transfer fluid, solar air collectors rather give poor yields. It has been found very useful to have ‘baffling’ obstacles of various shapes and forms in the solar collector duct. This increases the thermal transfer of a coolant, which clearly improves the thermal efficiency of the solar air collector. This article consists mainly of studying the effects on heat transfer of turbulent forced convection by baffles of zigzag shapes, placed in a rectangular channel, using the finite volume method. The pressure-velocity coupling has been processed by the SIMPLEC algorithm. The results are presented in terms of the average Nusselt number and temperature field for different positions.

Słowa kluczowe

EN

turbulent flow; forced convection; rectangular pipe; baffle; heat transfer

PL

przepływ turbulentny; konwekcja wymuszona; przegroda; wymiana ciepła

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2018
• Tom: Vol. 39, no 4
• Strony: 141–--156
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Guendouz N.

• Unit of Research on Materials and Renewable Energies, Department of Physics, Faculty of Sciences, Abou Bekr Belkaïd University, BP 119-13000- Tlemcen, Algerie

autor

Bibi-Triki N.

• Unit of Research on Materials and Renewable Energies, Department of Physics, Faculty of Sciences, Abou Bekr Belkaïd University, BP 119-13000- Tlemcen, Algerie

autor

Didi F.

• Unit of Research on Materials and Renewable Energies, Department of Physics, Faculty of Sciences, Abou Bekr Belkaïd University, BP 119-13000- Tlemcen, Algerie

autor

Zidani C.

• Unit of Research on Materials and Renewable Energies, Department of Physics, Faculty of Sciences, Abou Bekr Belkaïd University, BP 119-13000- Tlemcen, Algerie

Bibliografia

• [1] Tandiroglu A.: Effect of flow geometry parameters on transient heat transfer for turbulent flow in a circular tube with baffle insert. Int. J. Heat. Mass Tran. 49(2006), 9, 1559–1567.
• [2] Molki M., Mostoufizadeh A.R.: Turbulent Heat transfer in rectangular ducts with repeated-baffle blockages. Int. J. Heat. Mass Tran. 32(1989), 8, 1491–1499.
• [3] Choudhury C., Garg H.P.: Performance of air heating collectors with packed air flow passage. Sol. Energy 505(199), 205–221.
• [4] Parkpoom Sriromreun, Chinaruk Thianpong, Pongjet Promvonge: Experimental and numerical study on heat transfer enhancement in a channel with Zshaped baffles. Int. Commun. Heat Mass 39(2012), 7, 945–952.
• [5] Kelkar K.M., Patankar S.V.: Numerical prediction of flow and heat transfer in parallel plate channel with staggered fins. J. Heat Transfer 109(1987), 1, 25–30.
• [6] Foued Chabane, Nesrine Hatraf: Experimental study of heat transfer coefficient with rectangular baffle fin of solar air heater. Front. Energ. 8(2014), 2, 160–172.
• [7] Menasria F., Moummi A.: Modélisation des échanges convectifs dans le conduit utile dñun capteur solaire plan à air muni de rugosités artificielles de formes rectangulaires . Rev. Energ. Renouv. 14(2011), 3, 369–379.
• [8] Rajendra K., Maheshwarib B.K., Karwac N.: Experimental study of heat transfer enhancement in an asymmetrically heated rectangular duct with perforated baffles. Int. Commun. Heat Mass 32(2005), 1-2, 275–284.
• [9] Molki M., Mostoufizadeh A.R.: Turbulent heat transfer in rectangular ducts with repeated-baffle blockages. Int. J. Heat Mass Transfer 32(1989), 8, 1491–1499.
• [10] Nasiruddin M.H., Kamran Siddiqui: Heat transfer augmentation in a heat exchanger tube using a baffle. Int. J. Heat Fluid Fl. 28(2007), 2, 318–328.
• [11] Ward S.: Optimization of the forms and provisions of obstacles in the mobile air vein of solar air collectors at two air layers for the maximization of the couple efficiency-rise in temperature. MSc thesis, University of Valenciennes, France, 1989.
• [12] Dermatni L.C., Vielmo H.A., Moller S.V.: Numeric and experimental analysis of the turbulent flow through a channel with baffle plates. J. Braz. Soc. Mech. Sci. & Eng. 26(2004), 2.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).