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Correction published on 25 September 2014, see Energies 2014, 7(9), 6223.
Open AccessArticle

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

Hydraulics, Hydraulic Machinery and Environmental Engineering Department, Power Engineering Faculty, University Politechnica of Bucharest, 313 Spl. Independentei, District 6, Bucharest 060042, Romania
This paper was previously presented at the 1st International e-Conference on Energies 2014, c016, doi:10.3390/ece-1-c016, available online: http://www.sciforum.net/conference/ece-1/paper/2344.
Energies 2014, 7(6), 3781-3792; https://doi.org/10.3390/en7063781
Received: 9 April 2014 / Revised: 12 June 2014 / Accepted: 13 June 2014 / Published: 18 June 2014
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/m2. 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. View Full-Text
Keywords: solar air collector; performances; space heating; cooling; case studies solar air collector; performances; space heating; cooling; case studies
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Budea, S. Solar Air Collectors for Space Heating and Ventilation Applications—Performance and Case Studies under Romanian Climatic Conditions. Energies 2014, 7, 3781-3792.

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