5. Ishlab chikarish xonalarida yoritish vositalarini xisoblash Asboblar: lyuksometr, ruletka, sekundomer, eksperiment kismi . Xamma ishlab
chikarish xonalarida kunduzi tabiiy yoritish sistemalari ishlashi zarur.
Uch xil tabiiy yoritish sistemalari mavjud:
--- yon tomondan
--- yukoridan
--- aralash
Me’yoriy ulchov bulib yoritish koeffitsienti olinadi va foizlarda ulchanadi. U
kuyidagi formula bilan aniklanadi :
E=E
A
/Ei*100% (1)
E
A
– bino ichidagi A- nuktaning yoritilganligi;
Ei – bino tashkarisidagi yoritilganlik;
E
A
va Ei- lyuksometr yordamida aniklanadi;
Lyuksometrning elektr sxemasi
356
Bu erda Ro- obmotkaning karshiligi;
R1- balastning karshiligi
R2, R3, R4 – ulchov oraligidagi karshiliklar
Ulchash natijalari kuyidagi jadvalga kiritiladi
N.Nukta
Lyuksometrning kursatishi
Bino ichida
1
2
3
55 lyuks
50 lyuks
60 lyuks
Kuchada
1
2
2200 lyuks
900
lyuks
Urtacha yoritilganlik bino ichida 55 lyuks, kuchada 1520 lyuks ni tashkil kiladi
E= Ed/En*
100 =55/(1520 *2)*100 =1,77%
YOritish teshiklarining yuzasi kuyidagi formula bilan aniklanadi
So= e*h0*Ka*Sn*Kc/T0*R*100 (2)
Bu erda e=en* m*s
e
N
yoruglik iklimi buyicha tabiiy yoritilganlik koeffitsientining me`yoriy kiymati
(laborotoriyalar uchun en =1,77)
M-yoritish iklimi buyicha koefitsent (Toshkent uchun m=0,8)
S-kuyoshli kunlar koeffitsienti (Toshkent uchun s= 0,7)
h0 – derazaning yoruglik tasnifi
Ka –karshi binolarning soya kilish koeffitsienti
Sn – laboratoriyaning yuzasi, m
2
Kc – chang kontsentratsiyalarining extiyot koeffitsienti
T0 - yoruglik utkazish koeffitsienti
357
R –YOn tomonidan yoritishda yoruglikning kaytish koeffitsienti
So = (0,84*45*1*42*1,2)/(0,8+0,9+0,8)*1,5*100=5,99m
2