The thermal comfort conditions for people in moderate thermal environments are subjected to spatial changes, depending on the radiative exchanges of the human body with the surrounding surfaces. Radiative thermal exchanges are notably accounted for by means of the “view factors” between a person in a given posture and the surface of the enclosure. These important parameters can be evaluated by means of a large set of graphs by Fanger, for rectangular surfaces. But the handling of graphs could lead to reading errors. In this paper a simple algorithm is presented, which is able to compute the required view factors. A validation, by means of a comparison against experimental data, is also reported.
Cannistraro, G., Franzitta, G., Giaconia, C., Rizzo, G. (1992). Algorithms for the calculation of the view factors between human body and rectangular surfaces in parallelepiped environments. ENERGY AND BUILDINGS, 19(1), 51-60 [10.1016/0378-7788(92)90035-F].
Algorithms for the calculation of the view factors between human body and rectangular surfaces in parallelepiped environments
GIACONIA, Carlo;RIZZO, Gianfranco
1992-01-01
Abstract
The thermal comfort conditions for people in moderate thermal environments are subjected to spatial changes, depending on the radiative exchanges of the human body with the surrounding surfaces. Radiative thermal exchanges are notably accounted for by means of the “view factors” between a person in a given posture and the surface of the enclosure. These important parameters can be evaluated by means of a large set of graphs by Fanger, for rectangular surfaces. But the handling of graphs could lead to reading errors. In this paper a simple algorithm is presented, which is able to compute the required view factors. A validation, by means of a comparison against experimental data, is also reported.
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