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Thursday, May 7, 2020 | History

3 edition of Modeling topographic influences on solar radiation found in the catalog.

Modeling topographic influences on solar radiation

Modeling topographic influences on solar radiation

a manual for the SOLARFLUX model

  • 209 Want to read
  • 5 Currently reading

Published by Los Alamos National Laboratory, National Aeronautics and Space Administration, National Technical Information Service, distributor in Los Alamos, N.M, [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Position (Location),
  • Shadows.,
  • Solar position.,
  • Solar radiation.,
  • Geographic information systems.,
  • User manuals (Computer programs),
  • Diffuse radiation.,
  • Computerized simulation.,
  • Insolation.,
  • Sky brightness.

  • Edition Notes

    Other titlesManual for the SOLARFLUX model.
    StatementP.M. Rich, W.A. Hetrick, S.C. Saving.
    SeriesNASA contractor report -- NASA CR-201795.
    ContributionsHetrick, W. A., Saving, S. C., Los Alamos National Laboratory., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15505170M

    C. Determination of Incident Solar Radiation on Tilted Surfaces The incident solar irradiation on a tilted surface is the sum of a set of radiation streams including beam radiation, the three components of diffuse radiation from the sky, and the radiation reflected from the various surfaces seen by the tilted Size: KB.   Calculates the Roberts and Cooper () Solar-radiation Aspect Index Roberts and Cooper () rotates (transforms) the circular aspect to assign a value of zero to land oriented in a north-northeast direction, (typically the coolest and wettest orientation), and a value of one on the hotter, dryer south-southwesterly slopes. The result is a continuous variable between 0 - 1.

    The solar radiations are the primary cause, that is true, not those of light, but of heat. The loss of energy, I have found, is due to the evaporation of the water on that side of the earth which is turned toward the sun, the conducting particles carrying off more or less of the electrical charges imparted to the ground. There are many ways to approximate the solar energy. For example, we can estimate the average solar radiation every hour and add up the averages over the course of the day: Between 9 and 10 am, the solar radiation is around $\frac{W}{m^2}$. So during that 1-hour period, the solar energy generated is approximately $\frac{Wh}{m^2}$.

    1 Solar Radiation Measurement: Progress in Radiometry for Improved Modeling 1 Christian A. Gueymard and Daryl R. Myers 1 Introduction ] 2 Solar Radiation Measurement Fundamentals 1 3 Components of Solar Radiation in the Atmosphere 3 4 Instrumentation: Solar Radiometer 5 5 Radiometric Reference and Calibration Methods 8. Get print book. No eBook available. receiver reflected scattered radiation shown in Fig shows sky radiation Smithsonian Inst solar cell solar constant solar energy solar radiation solar spectrum spectral curves spectral regions strips sunshine temperature thermal thermopile thickness tion tube turbidity factor values variation various.


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Modeling topographic influences on solar radiation Download PDF EPUB FB2

@article{osti_, title = {Modeling topographic influences on solar radiation: A manual for the SOLARFLUX Model}, author = {Rich, P M and Hetrick, W A and Saving, S C}, abstractNote = {SOLARFLUX is a geographical information system (GIS) based computer program (running under ARC/INFO and GRID) that models incoming solar radiation based on surface orientation (slope and.

Modeling topographic influences on solar radiation: A manual for the SOLARFLUX model Article (PDF Available) December with Reads How we measure 'reads'. Modeling Topographic Influences on Solar Radiation: A Manual for the SOLARFLUX Model. Los Alamos. NATIONAL LABORATORY. Los Alamos National Laboratory is operated by the University of California for the United States Department of Energy under contract WENG Get this from a library.

Modeling topographic influences on solar radiation: a manual for the SOLARFLUX model. [P M Rich; W A Hetrick; S C Saving; Los Alamos National Laboratory.; United States. National Aeronautics and Space Administration.]. A clear-sky spectral solar radiation model for direct and diffuse fluxes, combined with topographic calculations from digital terrain data, computes either incident, net, or reflected solar.

Solar radiation energy depends mostly on incidence angle, which is defined by astronomical and surface parameters. Our solar radiation model is based on defining incidence angle by computing normal-to-the-surface tangent plane and direction of the Sun.

If a part of the surface is in the shadow, it receives lesser energy than sunny by: Modeling Topographic Influences on Solar Radiation: a Manual for the SOLARFLUX Model. LAM.

Los Alamos National Laboratory, Los Alamos, New Mexico, Google ScholarCited by: Modelling Solar Irradiation. With planetary movements, processes in the atmosphere and other effects, solar radiation on earth is an intermittent source of energy.

On the earth’s surface the peak solar intensity hovers around 1 kW/m² on a horizontal surface at sea level with the sun in its apex on a clear day. Solar radiation exhibits strong spatial and temporal variations influenced by many factors. For example, basic patterns of seasonal and daily variations given by astronomic factors are modified by actual atmospheric conditions influencing absorption, scattering, and solar radiation spectrum.

Solar Radiation Modeling and Measurements for Renewable Energy Applications: Data and Model Quality. Preprint. D.R. Myers. To be presented at the International Expert Conference on Mathematical Modeling of Solar Radiation and Daylight—Challenges for the st.

Century Edinburgh, Scotland September 15–16, National Renewable Energy File Size: KB. Solar radiation takes a long journey until it reaches Earth’s surface.

So when modelling solar radiation, various interactions of extra-terrestrial solar radiation with the Earth’s atmosphere, surface and objects are to be taken into account.

The component that is neither reflected nor scattered, and which directly reaches the surface, is. Topographic solar radiation models for CIS Figure 3. Topographic corrections are a function of atmospheric conditions.

These figures of the Grand Canyon are representative of radiation maps under (a) clear sky and (b) cloudy sky conditions. (a) is a map.

But the radiation reaching some point on Earth surface is random in nature. The main cause is the fact that various gases within the atmosphere absorb solar radiation at different wavelengths, and clouds and dust also affect it. There are two ways to obtaining solar radiation data at ground level: by measurement and by modelling.5/5(1).

Solar Radiation Modeling. Brett Gilman & Karen Mulcahy The modeling of incident solar energy is significant in the field of Geographic Information Systems (GIS) and image processing systems. The topography of an area expressed as elevation, slope, and slope orientation create strong variations in the radiation incident upon the earth and hence.

Solar Radiation Budget The radiation from the Sun travels in the space as electromagnetic wave. Above the earth’s atmosphere, sunlight carries watts of power per square meter.

This is known as solar constant. We define solar constant as the amount of solar radiation receivedFile Size: 1MB. GIS-Based Solar Radiation Modeling. Ralph Dubayah and Paul M. Rich. Incident solar radiation at the earth’s surface is the result of a complex interaction of energy between the atmosphere and the surface.

Recently much progress has been made toward the creation of accurate, physically based solar radiation. spatially distributed topographic solar radiation, from the simplest ones (proxies based on slope, and sine or cosine transformed values of aspect) to more elaborate ones using a GIS program suited to calculations of monthly clear sky and overcast solar radiation.

radiation calculated for a particular location or area is given as global radiation. The calculation of direct, diffuse, and global insolation are repeated for each feature location or every location on the topographic surface, producing insolation maps for an entire geographic area.

Solar Radiation Equations Global radiation (Global tot. The book contains fundamentals of solar radiation, its ecological impacts, applications, especially in agriculture, architecture, thermal and electric energy.

Chapters are written by numerous experienced scientists in the field from various parts of the world. Apart from chapter one which is the introductory chapter of the book, that gives a general topic insight of the book, there are 24 more. evaluation of solar radiation but is seldom a viable option on a large scale.

As a result, modeling approaches are used either without benefit of any measured data or as a tool to extrapolate measured results from a nearby site. Modeling the radiation environment is an attractive alternative because the cost of obtaining information is Cited by: 4.

Climatology models of the Earth’s natural trapped radiation environment are undergoing revolutionary change in response to new requirements from the satellite industry, new data sources, and new modeling techniques.

It has been clear for. Near-Earth Space Radiation Models. Michael A. File Size: KB.Energy is considered as a key source for the future and plays a pivotal role in its socioeconomic development by raising the standard of living and the quality of life, not only for India but also for the world.

In view of the scarce fossil fuel reserves, solar energy is one of the important sources of renewable energy used in India because of the suitable climate conditions. It receives about Cited by: Plane of Array Radiation 9 POA irradiance is from three sources: DNI, DHI and solar radiation reflected by land surface.

An isotropic model assumes all diffuse radiation is uniformly distributed over the sky. Anisotropic models such as the Perez model accounts for the non-uniformity of diffuse light.