INCIDENCE ANGLE MODIFIERS: A GENERAL APPROACH FOR ENERGY CALCULATIONS
The calculation of the energy (power) delivered by a given solar collector, requires special care in the consideration of the way it handles the incoming solar radiation. Some collectors, e.g. flat plate types, are easy to characterize from an optical point of view, given their rotational symmetry with respect to the incident angle on the entrance aperture. This in contrast with collectors possessing a 2D (or cylindrical) symmetry, such as collectors using evacuated tubes or CPC collectors, requiring the incident radiation to be decomposed and treated in two orthogonal planes. Analyses of incidence angle modifier (IAM) along these lines were done in the past for parabolic through, evacuated tube (ETC) or compound parabolic concentrator (CPC) collectors 1-6. The present paper addresses a general approach to IAM calculation, treating in a general, equivalent and systematic way all collector types. This approach will allow the proper handling of the solar radiation available to each collector type, subdivided in its different components, folding that with the optical effects present in the solar collector and enabling more accurate comparisons between different collector types, in terms of long term performance calculation.
Maria Jo(a)o Carvalho Pedro Horta Jo(a)o Farinha Mendes Manuel Collares Pereira Wildor Maldonado Carbajal
INETI -Instituto Nacional de Engenharia Tecnologiae Inova(c)(a)o, IP Estrada do Pa(c)o do Lumiar, 22 AO SOL, Energias Renováveis, S.A .P.Industrial do Porto Alto, Sesmaria Limpa, 2135-402 Samora Correi
国际会议
2007世界太阳能大会(Proceedings of ISES Solar World Congress 2007)
北京
英文
2007-09-18（万方平台首次上网日期，不代表论文的发表时间）