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Sa se proiecteze instalatia de iluminat interior a unei sali de lectura, avand urmatoarele date de
proiectare:
L= 10 [m];
L = 8 [m];
H = 3.4 [m];
1) Calculul de dimensionare a sistemului de iluminat:
Fluxul luminos necesar:
nec=EmS
Mfu =50080
0.80.68 =73!"lm;
#m ni$elul de iluminare;
%& &actor de mentinere;
' su(ra&ata;
m ales cor(uri de iluminat *ira 11+!8 ! , 8 cu = 00 - cu
dimensiunile L =1!7mm l = 0.7 mm / = 110 mm.
Indicele incaperii:
i =L x l
hutil(L+l) =108
2.6 (10+8) = 1.71;
eulta &actorul de utiliare u = 0.28
umarul de cor(uri de iluminat:
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n =nec
1 l =73529
5500 = 13.32 lam(i (rin rotunire
n0 = 14 =
7cor(uri de iluminat.
*lu,ul luminos 5nal:
nec= 6 1l= 14 , 00 = 77000 lm.
Lam(ile uorescente au &ost am(lasate (e ! randuri de cate 4 res(ecti$ 3
cor(uri cele ! randuri 5ind (aralele cu (eretele care are su(ra&ete $itrate.
2) Verifcarea sistemului de iluminat
%etoda insumarii curelor iolu,:
9. 'tailire (uncte;99. a=0; =0.; c=1; d=1.; e=!; &=!.; =3; /=3.;
999. arctg
a
h;
9. (I)CDILELBA;
. I=(I)CDILnl
1000;
9. k=MfIh
a
2
+b2
;
99. e
1, e
2lL=e1+e2 ;
999.
1,2=
l1,2
a2+h2;
9
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%etoda (unct cu (unct:
9luminarea medie directa:
E!i=118779[ lx]
Em!=1
n E!i=
1
320118779=371[lx]
9luminarea medie reectata:
Emr=
Mf"u12#1c
S(1#(1u12 )) [ lx]
-
Mf=0.8
-
"=1!c
=0.61 ;
-
!=S
n Ei=
80
320118779=29694 [lm];
-
c
=77000 [lm ] ;
-
u12= St
St+Sp=0.4 ;
-
S t=80 [m2 ];
-
Sp=122.4 [m2 ] ;
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-
#1=
#pSp+#tStSp+St
=0.58
Emr=145 [lx ] ;
C1=
Emin!+EmrEm!+Emr
=0.35 ;
C2=Emin!
$ +Emr
Emax!$ +Emr
=0.78;
E!=Em!+Emr=371+145=316[ lx]
9#'9>># >#H9C ?# [email protected]'>C>99
AC#'>9Facultatea de Inginerie a Instalatiilor
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#c/i(amente (entru alimentarea cu enerie
electrica
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