Thermal Radiation Absorption by Water Curtains

2013 ◽  
Vol 21 (7) ◽  
pp. 73-82 ◽  
Author(s):  
A.G. VINOGRADOV ◽  
Keyword(s):  
Thermal Radiation ◽  
Radiation Absorption

scholarly journals Thermal Radiation Absorption in Rectangular-Groove Cavities

1963 ◽  
Vol 30 (2) ◽  
pp. 237-244 ◽  
Author(s):  
E. M. Sparrow ◽  
V. K. Jonsson
Keyword(s):  
Thermal Radiation ◽  
Incident Energy ◽  
Radiation Absorption ◽  
External Radiation ◽  
Energy Distributions ◽  
Surface Conditions ◽  
Incoming Radiation ◽  
Wide Range ◽  
Cavity Opening ◽  
Rectangular Groove

The amount of energy absorbed when a stream of external radiation enters a rectangular-groove cavity has been calculated for a variety of surface conditions, cavity depths, and incident energy distributions. The surfaces of the cavity are either diffuse reflectors or specular reflectors, and a wide range of reflectivity values has been considered. The incoming radiation is either diffusely distributed across the cavity opening or else arrives in a bundle of parallel rays. The results show that for diffuse incoming radiation, a specular cavity absorbs more effectively than does a diffuse cavity. For incoming radiation in a parallel ray bundle, the comparison depends on the angle of inclination of the rays.

scholarly journals HOURLY CALCULATION METHOD OF BUILDING ENERGY DEMAND FOR SPACE HEATING AND COOLING BASED ON STEADY-STATE HEAT BALANCE EQUATIONS

2012 ◽  
Vol 18 (3) ◽  
pp. 356-368 ◽  
Author(s):  
Edmundas Monstvilas ◽  
Vytautas Stankevicius ◽  
Juratė Karbauskaitė ◽  
Arunas Burlingis ◽  
Karolis Banionis
Keyword(s):  
Absorption Coefficient ◽  
Thermal Radiation ◽  
Thermal Energy ◽  
Calculation Method ◽  
Energy Flow ◽  
Energy Demand ◽  
Radiation Energy ◽  
Short Wave ◽  
Radiation Absorption ◽  
Heating And Cooling

Correct evaluation of solar heat gains through fenestration into the rooms has a great impact on energy demand calculations for buildings. This article presents an hourly energy demand calculation method for heating and cooling, which considers the fact that the solar radiation flow passed through the transparent fenestration into the rooms is not adequate to the thermal energy flow. This method considers that the thermal energy flow in the rooms transformed from solar thermal radiation depends on the short-wave thermal radiation absorption coefficient of internal surfaces of the rooms. The value of short-wave thermal radiation absorption coefficient forms a considerable impact on the flow of thermal energy gains in the room. The presented method differs from others on that score that it considers additionally physical lows, according to which the solar short-wave thermal radiation energy admitted into the room is converted into the thermal energy. This hourly method enables precise calculating the hourly mean of indoor temperature and energy demand for heating and cooling of the buildings during the day.

Thermal Radiation Absorption by Metals

1960 ◽  
pp. 224-229 ◽  
Author(s):  
M. M. Fulk ◽  
M. M. Reynolds ◽  
O. E. Park
Keyword(s):  
Thermal Radiation ◽  
Radiation Absorption
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