Queries, comments, suggestions? Please contact us.



Area Lighting / Lighting technology and daylighting

IEV ref 845-29-093

Symbol
c21
c12

en
configuration factor, <between two surfaces>
quotient of the irradiance or illuminance, E2 (or E1), at a point on surface S2 (or S1) due to the flux received from surface S1 (or S2) and the radiant exitance or luminous exitance, M1 (or M2), of surface S1 (or S2)

c 21 = E 2 M 1 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aadogadaWgaaWcbaGaaGOmaiaaigdaaeqaaOGaeyypa0ZaaSaaaeaa caWGfbWaaSbaaSqaaiaaikdaaeqaaaGcbaGaamytamaaBaaaleaaca aIXaaabeaaaaaaaa@3E3A@

or

c 12 = E 1 M 2 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aadogadaWgaaWcbaGaaGymaiaaikdaaeqaaOGaeyypa0ZaaSaaaeaa caWGfbWaaSbaaSqaaiaaigdaaeqaaaGcbaGaamytamaaBaaaleaaca aIYaaabeaaaaaaaa@3E39@

Note 1 to entry: The relation between the configuration factor, c, and the (mutual) exchange coefficient, g, is

A 2 c 21 d A 2 = A 2 E 2 d A 2 M 1 = Φ 2 M 1 =g = Φ 1 M 2 = A 1 E 1 d A 1 M 2 = A 1 c 12 d A 1 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaam aapefabaGaam4yamaaBaaajeaybaGaaeOmaiaabgdaaSqabaGccaqG KbGaamyqamaaBaaaleaacaqGYaaabeaakiabg2da9maalaaabaWaa8 quaeaacaWGfbWaaSbaaKqaGfaacaqGYaaaleqaaOGaaeizaiaadgea daWgaaqcbawaaiaabkdaaeqaaaWcbaGaamyqamaaBaaajiaybaGaaG OmaaqabaaaleqaniabgUIiYdaakeaacaWGnbWaaSbaaKqaGfaacaqG XaaabeaaaaGccqGH9aqpdaWcaaqaaiaadA6adaWgaaqcbawaaiaabk daaeqaaaGcbaGaamytamaaBaaajeaybaGaaGymaaqabaaaaOGaeyyp a0Jaam4zaaWcbaGaamyqamaaBaaajiaybaGaaeOmaaqabaaaleqani abgUIiYdGccqGH9aqpdaWcaaqaaiaadA6adaWgaaqcbawaaiaabgda aeqaaaGcbaGaamytamaaBaaajeaybaGaaeOmaaWcbeaaaaGccqGH9a qpdaWcaaqaamaapefabaGaamyramaaBaaajeaybaGaaeymaaqabaGc caqGKbGaamyqamaaBaaajeaybaGaaeymaaqabaaaleaacaWGbbWaaS baaKGaGfaacaqGXaaabeaaaSqab0Gaey4kIipaaOqaaiaad2eadaWg aaqcbawaaiaabkdaaeqaaaaakiabg2da9maapefabaGaam4yamaaBa aajeaybaGaaeymaiaabkdaaSqabaGccaqGKbGaamyqamaaBaaajeay baGaaeymaaqabaaaleaacaWGbbWaaSbaaKGaGfaacaqGXaaabeaaaS qab0Gaey4kIipaaaa@72DC@

where Φ2 (or Φ1) is the flux received over surface S2 (or S1) from surface S1 (or S2) and A2 (or A1) is the area of surface S2 (or S1)

Note 2 to entry: The configuration factor has unit one.

Note 3 to entry: This entry was numbered 845-09-72 in IEC 60050-845:1987.


fr
facteur de configuration, <entre deux surfaces> m
quotient de l'éclairement énergétique ou de l'éclairement lumineux E2 (ou E1), en un point d'une surface S2 (ou S1) dû au flux reçu de la surface S1 (ou S2) par l'exitance énergétique ou lumineuse, M1 (ou M2), de la surface S1 (ou S2)

c 21 = E 2 M 1 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aadogadaWgaaWcbaGaaGOmaiaaigdaaeqaaOGaeyypa0ZaaSaaaeaa caWGfbWaaSbaaSqaaiaaikdaaeqaaaGcbaGaamytamaaBaaaleaaca aIXaaabeaaaaaaaa@3E3A@

ou

c 12 = E 1 M 2 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aadogadaWgaaWcbaGaaGymaiaaikdaaeqaaOGaeyypa0ZaaSaaaeaa caWGfbWaaSbaaSqaaiaaigdaaeqaaaGcbaGaamytamaaBaaaleaaca aIYaaabeaaaaaaaa@3E39@

Note 1 à l'article: La relation entre le facteur de configuration, c, et coefficient d'échange mutuel, g, est

A 2 c 21 d A 2 = A 2 E 2 d A 2 M 1 = Φ 2 M 1 =g = Φ 1 M 2 = A 1 E 1 d A 1 M 2 = A 1 c 12 d A 1 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaam aapefabaGaam4yamaaBaaajeaybaGaaeOmaiaabgdaaSqabaGccaqG KbGaamyqamaaBaaaleaacaqGYaaabeaakiabg2da9maalaaabaWaa8 quaeaacaWGfbWaaSbaaKqaGfaacaqGYaaaleqaaOGaaeizaiaadgea daWgaaqcbawaaiaabkdaaeqaaaWcbaGaamyqamaaBaaajiaybaGaaG OmaaqabaaaleqaniabgUIiYdaakeaacaWGnbWaaSbaaKqaGfaacaqG XaaabeaaaaGccqGH9aqpdaWcaaqaaiaadA6adaWgaaqcbawaaiaabk daaeqaaaGcbaGaamytamaaBaaajeaybaGaaGymaaqabaaaaOGaeyyp a0Jaam4zaaWcbaGaamyqamaaBaaajiaybaGaaeOmaaqabaaaleqani abgUIiYdGccqGH9aqpdaWcaaqaaiaadA6adaWgaaqcbawaaiaabgda aeqaaaGcbaGaamytamaaBaaajeaybaGaaeOmaaWcbeaaaaGccqGH9a qpdaWcaaqaamaapefabaGaamyramaaBaaajeaybaGaaeymaaqabaGc caqGKbGaamyqamaaBaaajeaybaGaaeymaaqabaaaleaacaWGbbWaaS baaKGaGfaacaqGXaaabeaaaSqab0Gaey4kIipaaOqaaiaad2eadaWg aaqcbawaaiaabkdaaeqaaaaakiabg2da9maapefabaGaam4yamaaBa aajeaybaGaaeymaiaabkdaaSqabaGccaqGKbGaamyqamaaBaaajeay baGaaeymaaqabaaaleaacaWGbbWaaSbaaKGaGfaacaqGXaaabeaaaS qab0Gaey4kIipaaaa@72DC@

Φ2 (or Φ1) est le flux reçu sur la surface S2 (ou S1) en provenance de la surface S1 (ou S2) et A2 (ou A1) est l'aire de la surface S2 (ou S1)

Note 2 à l'article: L'unité de facteur de configuration est un.

Note 3 à l'article: Cet article était numéroté 845-09-72 dans l'IEC 60050-845:1987.


ar
عامل النكوين, <بين سطحين>

de
Konfigurationsfaktor, <zwischen zwei Flächen> m

it
fattore di configurazione, <tra due superfici>

ko
입체각 투사율, <두 표면 S1 과 S2 사이>

ja
立体角投射率

pl
współczynnik konfiguracji, <między dwiema powierzchniami> m

pt
fator de configuração, <entre duas superfícies>

zh
构造系数, <两表面之间的>

Publication date: 2020-12
Copyright © IEC 2021. All Rights Reserved.