Estimating clear-day solar radiation: An evaluation of three models

Tracy, C. Richard; Hammond, K.A.; Lechleitner, Richard A.; Smith, W.J.; Thompson, Daniel; Whicker, April D.; Williamson, Sarah

doi:10.1016/0306-4565(83)90003-7

Cited by 8 publications

(4 citation statements)

References 10 publications

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“…Although models exist to obtain an estimate of direct radiation on a clear day based on temporal variables and spatial coordinates [39], these models cannot predict the diffuse radiation, due to its dependency on, and the uncertainty of, local weather conditions. Instead, one can use typical meteorological year (TMY) data collected by the National Renewable Energy Lab (NREL) for locations throughout the United States [40].…”

Section: Solar Radiation and Photovoltaics Modelmentioning

confidence: 99%

“…Then, for heading ψ and pitch angle θ p , where ψ = 0 indicates north and θ p = 0 indicates a horizontal surface, I G is rotated as shown in Figure 9a,b. These rotations are carried out using the two rotation matrices R ψ and R θ , given in Equations (39) and (40), to obtain the direct radiation vector in the vehicle coordinate system, I V . I I denotes the direct radiation vector in the intermediate coordinate system between the global and vehicle coordinate systems: The unit normal vectors for the PV module surfaces are then defined for each surface of the bus.…”

Section: Module Sizingmentioning

confidence: 99%

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Analysis of On-Board Photovoltaics for a Battery Electric Bus and Their Impact on Battery Lifespan

Mallon

Assadian

2017

Energies

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Heavy-duty electric powertrains provide a potential solution to the high emissions and low fuel economy of trucks, buses, and other heavy-duty vehicles. However, the cost, weight, and lifespan of electric vehicle batteries limit the implementation of such vehicles. This paper proposes supplementing the battery with on-board photovoltaic modules. In this paper, a bus model is created to analyze the impact of on-board photovoltaics on electric bus range and battery lifespan. Photovoltaic systems that cover the bus roof and bus sides are considered. The bus model is simulated on a suburban bus drive cycle on a bus route in Davis, CA, USA for a representative sample of yearly weather conditions. Roof-mounted panels increased vehicle driving range by 4.7% on average annually, while roof and side modules together increased driving range by 8.9%. However, variations in weather conditions meant that this additional range was not reliably available. For constant vehicle range, rooftop photovoltaic modules extended battery cycle life by up to 10% while modules on both the roof and sides extended battery cycle life by up to 19%. Although side-mounted photovoltaics increased cycle life and range, they were less weight-and cost-effective compared to the roof-mounted panels.

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Section: Solar Radiation and Photovoltaics Modelmentioning

confidence: 99%

Section: Module Sizingmentioning

confidence: 99%

Analysis of On-Board Photovoltaics for a Battery Electric Bus and Their Impact on Battery Lifespan

Mallon

Assadian

2017

Energies

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“…Unfortunately, for spectral models, geograph ically representative data are not readily available. Conceptually, as a more practical alternative, clear sky adaptations of single-atmosphericlayer broadband radiative transfer routines (generally, .3 -3.0 similar to those of Atwater and Ball (1976) or should do but their use has also been limited because they require input data that have been scarce or unavailable and had to be estimated in various, often indirect, ways (e.g., see Suckling aind Hay, 1976;Meyers and Dale, 1983;or Tracy et al, 1983). all on an hourly basis, for 56 primary sites and 183 secondary sites (NREL, 1992; .…”

Section: Introductioamentioning

confidence: 99%

“…Their scaling of the maximiim amplitude was arbitrary and the daily global solar radiation data selected did not come from the maximum daily value over a 30 year span. The WHO (1967) recommends a 30 year record for 13 determining normals euid variation Tracy et al (1983). compared three, not completely physically comprehensive, broadband-radiative-transfer models.…”

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confidence: 99%

Progress toward the better estimation of regional evapotranspiration

Meek

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This manuscript has been reproduced from the microfilm master. TJMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer.The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction.In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion.Oversize materials (e.g., m^s, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continuing from left to right in equal sections with small overlaps. Each original is also photographed in one oqiosure and is included in reduced form at the back of the book.

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The influence of bipedalism on the energy and water budgets of early hominids

Wheeler

1991

Journal of Human Evolution

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Estimating clear-day solar radiation: An evaluation of three models

Cited by 8 publications

References 10 publications

Analysis of On-Board Photovoltaics for a Battery Electric Bus and Their Impact on Battery Lifespan

Analysis of On-Board Photovoltaics for a Battery Electric Bus and Their Impact on Battery Lifespan

Progress toward the better estimation of regional evapotranspiration

The influence of bipedalism on the energy and water budgets of early hominids

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