Page 34 - Website 128

vKŽ NT WL?O� b?L²?FðË
ÃUłe� WOzu?C�« W¹–UHM�«
b?I?� q�UF?�Ë …c?�UM�«
Èdš√ q�«uŽ Í√Ë ¡uC�«
¡uC�« W?OL?� vKŽ dŁRð
ÆW�dG�« v�≈ qš«b�«
q�U??F??� 5O??Fð ≠≥
Coefficient …œUH?²Ýô«
ÆÆof Utilization (CU)
5Ð W³?�M�« wDF¹ u¼Ë
W?OKš«b�« …¡U{ù« …b?ý
…¡U??{ù« …b??ýË (Ei)
Æ(Ex) WOł—U)«
…b??ý »U??�??Š ≠¥
sŽ W?O?Kš«b�« …¡U?{ù«
U?OLJ�« »d?{ o¹dÞ
∫Í√ ÆÆWIÐU��« Àö¦�«
Ei = Ex.NT. CU (1)
WO?I�_« …¡U{ù« …býË —ËUM*« W?ŠU�� s� q� W�d?F� ∫Toplighting WO�uH�« …¡U{û� ¢s�uK�«¢ WI¹dÞ ≠ jÝu²?� WLO� 5O?F²� (1) r�— W�œU‡F*« Âb�?²�ð
W�œUF*« fH½ s� …œUH² ?Ýô« sJ1 ÆÆfJF�UÐË ÆWOł—U)« w� WOI?�√ Uײ� ‰öš s� WO?�uH�« …¡U{ù« wðQð W�UŠ w� qL?F�« Èu²�?� vKŽ W¹—UNM�« …¡U?{ù« …bý
W�“ö�« W?OI?�_« WO?�uH�« W×?²H�« W?ŠU�� 5?OFð w� Ác¼ ÷d²HðË ÆW�UH?A�« nIÝ_«Ë —ËUM*« q¦� nI��« ÂœUI�« ¡uCK?� W³�M�UÐ U�√ ÆnI��« s?� ÂœUI�« ¡uC�«
«–≈ qLF�« Èu²�� vKŽ WMOF� …¡U{≈ …bý vKŽ ‰uB×K� pKð ‰öš s� W?�dG�« v�≈ qš«b�« ¡u?C�« Ê√ ÆÆWI¹dD�« …bý 5O?F²� W�œU?F*« fH½ oO³D?ð r²O� ÆÆc?�«uM�« s�
ÆWOł—U)« WOI�_« …¡U{ù« …býË …bA�« Ác¼ U²LO� rKÔŽ r²¹Ë ÆWײH�« pKð vKŽ U�½U−²� UF¹“uð Ÿ“u� UײH�« t½UOÐ wðQ?OÝ UL� W?OFłd� jI½ fL?š bMŽ …¡U{ù«
w� (2) W�œUF*« oO³Dð w� WO�?Ozd�« WÐuFB�« q¦L²ð Èu²�� v?KŽ WOI�_« …¡U{ù« …bý jÝu?²� »U�Š nI?��« s� —UN?M�« ¡u{ ‰u?šœ W�U?Š w�Ë ÆUI?Šô
q� WLO� vKŽ bL² ?Fð YOŠ ÆÆW�u³I� W�bÐ ST WLO� 5OFð ∫WOðü« (2) W�œUF*« «b�²ÝUÐ wI�_« qLF�« lLł r²¹ r?Ł ÆÆ…bŠ vKŽ W×?²� q� o³D²?� ÆÆc�«uM�«Ë
(TD) d?ýU³*« fL?A�« ¡u?C� WB�U?)« W¹–U?HM�« s� Ei = Exh . ST . CU . (As / Aw) (2) WOKJ?�« …¡U{ù« …bý vKŽ ‰u?B×K� …¡U?{ù« vðbý
l½UB� wDFðË Æ© Td® ¡UL��« ¡uC� WB�U)« W¹–UHM�«Ë qL?F�« Èu²?�� v?KŽ …¡U{ù« …b?ý jÝu²?� ∫Ei ÆW�dG�« qš«œ
…bO?ŠË WLO� p?O²Ýö³�«Ë ÃU?łe�« q¦� W�U?HA�« œ«u*«
W?×?²?H�« s� WD�U?��«
W¹Ë«“ l� TD W?LO?� d?O?Gð 5³¹ vM×M�Ë Td W¹–U?HMK� Æ©f�u�® WO�uH�« WO³½U'« W¹—UNM�« …¡U{ô« v� …œUH²Ýô« ö�UF� ∫©¥® r�— ‰Ëbł
qO�UHð w� ‰ušbK� ‰U ?:« l�²¹ ôË ÆfLA�« ◊uIÝ (IES) vł—U)« —UNM�« ¡u{ v²³�d� ÈËU�ð bMŽ
…¡U??{ù« …b?ý ∫ Exh
w� WBB�?²*« lł«d*« v�≈ Ÿułd�« sJ1Ë ÆWDIM�« pKð W?O?ł—U?)« W?O?I?�_« Room Window Width / Window Height Infenite
"The IESNA lłd*« v�≈ Ë√ W�UH?A�« `DÝ_« UŽUM� Depth / Percent
Âb?�?²?�¹Ë ÆÆLighting Handbook , Ninth Edition” —uM*« v?KŽ WD�U???��« Window D* .5 1 2 3 4 6 8
Height
Æ(1) W�œUF*« w� CU WLO� 5OFð w� ©≥® r�— ‰Ëb'« Æ©f�u�® 10 .671 .704 .711 .715 .717 .726 .726 .728
∫WO³½U'« …¡U{ö� ¢s�uK�«¢ WI¹dÞ ≠ WO�UL?łù« WŠU�*« ∫ As 30 .458 .595 .654 .668 .672 .682 .683 .625
vKŽ —ËU?M*« lO??L??' 1 50 .313 .462 .563 .589 .598 .607 .608 .610
W¹—U?OF?� W?�dG?� ©∑® r�— qJA�« IES b?L²?Ž« 70 .227 .362 .478 .515 .527 .530 .532 .534
Æ©≤® wI�_« Èu²�*«
wKŽ WMO?³*« ”UJF½ô« ö�U?F�Ë œU?FÐ_UÐ UÐU�?×K� 90 .186 .306 .424 .465 .481 .468 .471 .472
r�— ‰Ëb'« «b ?�²ÝUÐ CU WLO?� d¹bIð r²¹Ë ÆqJA�« Èu²?�� WŠU?�� ∫ AW 10 .545 .636 .658 .660 .661 .665 .666 .672
W?³�M�« V�?% YOŠ ÆÆW?MO³*« jI½ fL?)« bMŽ ©¥® Æ©≤® qLF�« 2 30 .239 .367 .459 .484 .491 .499 .501 .506
.203
.286
.121
.355
.348
.351
.320
.335
50
∫W�œUF*« s� RCR W�dGK� W¹u−H�« WB�U?)« W¹–UHM�« ∫ ST 70 .074 .128 .192 .226 .243 .259 .264 .267
RCR = 5H [(L+W) / LW] (3) b�«uH�« WMLC²� —ËUMLK� 90 .058 .101 .156 .188 .207 .215 .221 .223
.613
.607
.561
.614
.615
.616
10
.631
.431
…¡U{ù« …bý »U�Š w� (4) r�— W�œUF*« Âb�²�ðË …e?N?ł√ sŽ W??¾?ýUM�« 30 .133 .223 .306 .337 .348 .357 .357 .366
W??O?ł—U??)« …¡U?{ù« …b??ý W�ôbÐ Ei W?OKš«b�« ÆbIH�« ö�UF�Ë V−(« 3 50 .058 .103 .155 .183 .197 .211 .213 .218
.037
.119
.064
70
.150
.132
.147
.098
.154
©NT® ÃU?łeK� W?B�U?)« W¹–U?HM�«Ë ©Exv®WO?Ý√d�« Æ…œUH²Ýô« q�UF� ∫ CU 90 .030 .051 .079 .098 .110 .122 .126 .129
ÆCU …œUH²Ýô« q�UF�Ë Â«b?�??²?Ý« sJ1Ë 10 .339 .482 .549 .560 .563 .566 .565 .593
Ei = Exv . NT . CU (4)…bý 5O?F²� (2) W�œUF*« 4 30 .078 .139 .204 .234 .247 .258 .260 .272
.126
50
.060
.114
.094
.139
.033
.150
.143
w� Âb�²?�*« …œUH²Ýô« q�U?F� WLO?� 5OFð r²¹Ë vKŽ W¹—U??NM�« …¡U?{ù« 70 .022 .039 .061 .074 .083 .095 .099 .104
Æ©¥® r�— ‰Ëb'« s� (4) W�œUF*« W�UŠ w� qLF�« Èu ?²�� 90 .019 .032 .050 .061 .070 .080 .084 .089
10 .211 .343 .433 .453 .458 .461 .461 .518
30 .033 .065 .103 .123 .135 .145 .148 .167
6 50 .015 .029 .047 .057 .064 .073 .077 .086
70 .011 .021 .033 .040 .045 .051 .054 .060
90 .010 .019 .028 .034 .038 .044 .046 .052
10 .135 .238 .326 .353 .362 .366 .367 .452
8 30 .016 .034 .058 .072 .080 .090 .094 .116
.048
.059
.017
.045
.027
.008
.039
50
.034
70 .006 .013 .021 .026 .028 .032 .035 .043
90 .005 .012 .019 .023 .025 .029 .031 .038
10 .090 .165 .244 .272 .283 .290 .291 .395
10 30 .009 .020 .036 .045 .052 .060 .064 .087
.033
.044
.010
50
.005
.026
.030
.019
.023
70 .004 .009 .015 .018 .020 .023 .025 .033
90 .003 .008 .014 .016 .018 .020 .022 .030
W�dG�« oLF� W³�M�UÐ …c�UM�« vKŽ W¹œuLF�« W�U�*« ∫ D*