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Solar Air Collectors for Space Heating and Ventilation Applications—Performance and Case Studies under Romanian Climatic Conditions

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  • Sanda Budea

    (Hydraulics, Hydraulic Machinery and Environmental Engineering Department, Power Engineering Faculty, University Politechnica of Bucharest, 313 Spl. Independentei, District 6, Bucharest 060042, Romania)

Abstract

Solar air collectors have various applications: on the one hand, they can be used for air heating in cold seasons; on the other hand they can be used in summer to evacuate the warm and polluted air from residential, offices, industrial, and commercial buildings. The paper presents experimental results of a solar collector air, under the climatic conditions of the Southeastern Europe. The relationships between the direct solar irradiation, the resulting heat flow, the air velocity at the outlet, the air flow rate, the nominal regime of the collector and the efficiency of conversion of solar energy into thermal energy are all highlighted. Thus, it was shown that after a maximum 50 min, solar air collectors, with baffles and double air passage can reach over 50% efficiency for solar irradiation of 900–1000 W/m 2 . The article also presents a mathematical model and the results of a computational program that allows sizing solar collectors for the transfer of air, with the purpose of improving the natural ventilation of buildings. The article is completed with case studies, sizing the area to be covered with solar collectors, to ensure ventilation of a house with two floors or for an office building. In addition, the ACH (air change per hour) coefficient was calculated and compared.

Suggested Citation

  • Sanda Budea, 2014. "Solar Air Collectors for Space Heating and Ventilation Applications—Performance and Case Studies under Romanian Climatic Conditions," Energies, MDPI, vol. 7(6), pages 1-12, June.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:6:p:3781-3792:d:37195
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    References listed on IDEAS

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    1. Sandberg, Mats & Moshfegh, Bahram, 1998. "Ventilated-solar roof air flow and heat transfer investigation," Renewable Energy, Elsevier, vol. 15(1), pages 287-292.
    2. Chan, Hoy-Yen & Riffat, Saffa B. & Zhu, Jie, 2010. "Review of passive solar heating and cooling technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(2), pages 781-789, February.
    3. Lanjewar, Atul & Bhagoria, J.L. & Sarviya, R.M., 2011. "Heat transfer and friction in solar air heater duct with W-shaped rib roughness on absorber plate," Energy, Elsevier, vol. 36(7), pages 4531-4541.
    4. Hachemi, A., 1999. "Technical note Comparative study on the thermalperformances of solar air heater collectors with selectiveand nonselective absorber-plate," Renewable Energy, Elsevier, vol. 17(1), pages 103-112.
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    Cited by:

    1. Salma Benzaria & Ekaterina Mamontova & Yannick Guari & Joulia Larionova & Jérôme Long & Philippe Trens & Fabrice Salles & Jerzy Zajac, 2021. "Heat Release Kinetics upon Water Vapor Sorption Using Cation-Exchanged Zeolites and Prussian Blue Analogues as Adsorbents: Application to Short-Term Low-Temperature Thermochemical Storage of Energy," Energies, MDPI, vol. 14(12), pages 1-18, June.
    2. Sergio L. González-González & Ana Tejero-González & Francisco J. Rey-Martínez & Manuel Andrés-Chicote, 2017. "Alternative for Summer Use of Solar Air Heaters in Existing Buildings," Energies, MDPI, vol. 10(7), pages 1-15, July.
    3. Qader, Bootan S. & Supeni, E.E. & Ariffin, M.K.A. & Talib, A.R. Abu, 2019. "RSM approach for modeling and optimization of designing parameters for inclined fins of solar air heater," Renewable Energy, Elsevier, vol. 136(C), pages 48-68.
    4. Junichiro Matsunaga & Koki Kikuta & Hideki Hirakawa & Keita Mizuno & Masaki Tajima & Motoya Hayashi & Akira Fukushima, 2021. "An Assessment of Heating Load Reduction by a Solar Air Heater in a Residential Passive Ventilation System," Energies, MDPI, vol. 14(22), pages 1-12, November.
    5. Víctor Echarri-Iribarren & Carlos Rizo-Maestre & Fernando Echarri-Iribarren, 2018. "Healthy Climate and Energy Savings: Using Thermal Ceramic Panels and Solar Thermal Panels in Mediterranean Housing Blocks," Energies, MDPI, vol. 11(10), pages 1-32, October.

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