太阳辐射（solar radiation）.docVIP

太阳辐射（solar radiation） This article is contributed by danialmre DOC documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. 1. the solar constant 1.. The solar radiation at the average distance between the sun and the sun is called the solar constant. It is defined as the mean distance between the sun and the earth Solar energy flux through the unit cell area perpendicular to the solar beam. It represents the total solar radiation energy reaching the earths surface, which is shown in table 3.1. If the radius of the sun is the radiant energy, the sun at the suns surface is located, In which F represents the suns exit; and the average distance between the sun and the sun, they must be equal between the two, that is, the sun The radiant energy of the sun is So the solar constant is expressed as If the radius of the earth is The solar radiation intercepted by the earth is If this energy is evenly divided On the whole surface, the energy accepted by the atmosphere at the top of the unit per unit time or area is 2. radiation direction 2. radiation direction Mu: cosine of polar angle theta (zenith angle). Relative to the azimuth of the X axis. 3. optical thickness 3. optical thickness refers to the atmospheric thickness under the premise of taking into account the spectral attenuation coefficient and the atmospheric density The Z is a high layer, K lambda is spectral attenuation coefficient, P is the density of the atmosphere. 4. Dirac function 4. Dirac function 5. radiation flux density 5. radiation flux density radiant energy Q: refers to the energy carried by electromagnetic radiation or the total energy emitted by an object whose unit is joule. Radiant flux: the radiant energy that passes through a surface in unit time. It represents the rate at which radiant energy is transmitted Q is the radiant energy, and t is the time. If the radiant energy changes with time, the radiant flu