luminous exitance


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Related to luminous exitance: Luminous emittance

luminous exitance

n
(Units) the ability of a surface to emit light expressed as the luminous flux per unit area at a specified point on the surface. Symbol: Mv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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At each time step, the daylighting module calculated the luminous exitance of the shaded and non-shaded window areas depending on the position of the shading device(s).
where, [M.sub.i] was the final luminous exitance of a Lambertian surface 'i' [lm/[m.sup.2] (lm/[ft.sup.2])], [M.sub.oi] was the initial luminous exitance of surface 'i' [lm/[m.sup.2] (lm/[ft.sup.2])], [[rho].sub.i] was the diffuse light reflectance of surface 'i', [M.sub.j] represented the final exitance of all other surfaces in the room [lm/[m.sup.2] (lm/[ft.sup.2])] and [F.sub.ij] was the form factor between surface 'i' and all other enclosing surfaces in the room.
Daylighting and Thermal Assessment of Combined Dynamic Shading Systems on Energy Consumption in Educational Buildings
where, [E.sub.p] was the total horizontal illuminance at point 'p' [lx (fc)], [C.sub.pj] is the configuration factor from point 'p' to a surface room 'j', [M.sub.j] is the luminous exitance of surface 'j' after infinite inter-reflections [lm/[m.sup.2](lm/[ft.sup.2])], [C.sub.pls] is the configuration factor from a point to the light shelf and [M.sub.ls] is the light flux transmitted through the shelf per unit area [lm/[m.sup.2] (lm/[ft.sup.2])].
Daylighting and thermal assessment of combined dynamic shading systems on energy consumption in educational buildings

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