direct solar radiation

direct solar radiation

[də¦rekt ¦sō·lər rād·ē′ā·shən]
(astrophysics)
That portion of the radiant energy received at the actinometer direct from the sun, as distinguished from diffuse sky radiation, effective terrestrial radiation, or radiation from any other source.
References in periodicals archive ?
As shown in Figure 13, the extraterrestrial direct solar radiation belonging to a particular location varies throughout the year.
The absorbed direct solar radiation heat flux is shown as [15]
Three layers of construction materials were used to offset the effect of sol-air temperature resulting from direct solar radiation. In addition, an extra floor was modeled on top of the first floor to eliminate the impact of geothermal heat.
(A) The direct solar radiation component to the room is sensitive to the geometry of the rooms, zones and building.
The parameters include direct solar radiation, ambient temperature, wind velocity, water temperature, air humidity, and mass flow rate.
According to ASHRAE, the new version incorporates seven published addenda to the 2013 edition and includes a new requirement to calculate the impact of direct solar radiation on the thermal comfort of building occupants.
A combination of shading devices and clear type of glass provides the admission of daylight through the clear glass more than any other special type of glass, and protection for the window glass from any direct solar radiation that might cause excessive solar heat gain.
Note also that a decrease in beam coefficient is often accompanied by an increase in diffuse coefficient due to enhanced scattering of incoming direct solar radiation. Also, embedded in the representation of optical depth is the influence of elevation: higher locations tend to see less scattering and thus more direct solar radiation.
The main services are: Manufacture, supply and installation of a sun protection system consisting of vertical sun protection louvres for the reduction of direct solar radiation, consisting of reflective and absorbing perforated lamellas.
They depend directly on the amount of direct solar radiation for two air flow rates.
Figure 1(b) indicates that the diffuse solar radiation in Lhasa is similar to that in Beijing, while its direct solar radiation is much higher than that in Beijing, causing the total solar radiation to be much higher than that in Beijing.

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