Variation trend of direct and diffuse radiation in China over recent 50 years. Acta Physica Sinica, 60, 859-872. (in Chinese with English ab- stract) [马金玉, 梁宏, 罗勇, 李世奎 (2011). 中国近50 年太阳直接辐射和散射辐射变化趋势特征. 物理学报, 60, 859-872.]...
Definition of direct and diffuse radiation Description of direct and diffuse parts of global radiation Direct horizontal radiation (Bh) Shortwave radiation (0.2 - 3.0μm) arising from a narrow solid angle (5° aperture) centered around the sun's disk impinging on a horizontal surface. ...
Our solar resource comes to us in two primary forms: direct and diffuse radiation. A third source, reflected sunlight, is often overlooked and hard to predict but can add a significant gain to a solar energy system's production.rnDirect-beam radiation is often associated with desert environments...
"Diffuse radiation", on the other hand, describes the sunlight that has been scattered by molecules and particles in the atmosphere but that has still made it down to the surface of the earth.Direct radiation has a definite direction but diffuse radiation is just going any which way. Because...
Diffuse radiationModel validationHong KongThe paper studies the horizontal global, direct-beam and sky-diffuse solar radiation data measured in Hong Kong from 2008 to 2012, reports some of the general findings, evaluates mathematical model for predicting direct-normal solar radiation and computes ...
In a preceding paper, a method was presented to estimate the diurnal courses of total, direct and diffuse radiation from total daily radiation only. In the... JT C.,Spitters - 《Agricultural & Forest Meteorology》 被引量: 1265发表: 1986年 Consistency tests applied to the measurement of tota...
For these determinations, it is necessary to have, either from actual measurements or estimates, a knowledge of the total (direct plus diffuse) radiation on a horizontal surface-its measurement is now regularly made at 98 localities in the United States and Canada. For localities where only an...
Alternatively, we can compare the surface downward solar radiation of the 43 models against 38 sites from the BSRN network as used in Wild et al. (2013a). These sites can provide climatologies of surface downward solar radiation determined as the sum of the direct and diffuse radiation, measur...
A new, simple model for calculating clear sky direct and diffuse spectral irradiance on horizontal and tilted surfaces is presented. The model is based on previously reported simple algorithms and on comparisons with rigorous radiative transfer calculations and limited outdoor measurements. Equations for...
Hatfield, Correlations of total, diffuse and direct solar radiation with the percentage of possible sunshine for Davies, California. Solar Energy 27, 357-360 (1981).R.D. Shears, R.G Flocchini, and J.L. Hatfield ."Technical note on Correlation of Total, Diffuse and Direct Solar Radiation ...