64
5-Jadval
Havoning
harorati S
Turli haroratda va barometrik bosimlarda havoning zichligi J* (kg/ m3)
725
730
735
740
745
750
755
760
765
770
-10
1,280 1,289 1,292 1,307 1,316 1,325 1,333 1,342 1,351 1,360
-8
1,271 1,280 1,288 1,297 1,306 1,315 1,323 1,332 1,341 1,350
-6
1,261 1,270 1,279 1,287 1,296 1,305 1,313 1,322 1,331 1,340
-4
1,252 1,261 1,269 1,278 1,286 1,295 1,304 1,312 1,321 1,330
-2
1,243 1,251 1,260 1,268 1,277 1,286 1,294 1,303 1,311 1,320
0
1,234 1,242 1,251 1,259 1,268 1,276 1,285 1,193 1,302 1,310
+2
1,225 1,233 1,242 1,250 1,258 1,267 1,276 1,284 1,298 1,301
+4
1,216 1,224 1,233 1,241 1,249 1,258 1,266 1,274 1,283 1,291
+6
1,207 1,215 1,224 1,232 1,240 1,249 1,257 1,265 1,274 1,282
+8
1,198 1,107 1,215 1,223 1,232 1,240 1,248 1,256 1,265 1,273
+10
1,190 1,198 1,106 1,215 1,223 1,231 1,239 1,247 1,256 1,264
+12
1,182 1,190 1,198 1,206 1,214 1,222 1,231 1,239 1,247 1,255
+14
1,173 1,181 1,190 1,198 1,206 1,214 1,222 1,230 1,238 1,246
+16
1,165 1,173 1,81
1,197 1,205 1,197 1,213 1,222 1,230 1,238
+18
1,157 1,165 1,73
1,181 1,189 1,193 1,205 1,213 1,221 1,229
+20
1,149 1,157 1,165 1,173 1,181 1,189 1,197 1,205 1,213 1,221
Avto ta`mirlash zavodning issiqlik (termilcheskom ) sexida PN- 15 G
tipidagi uchta elektropechlar o`rnatilgan. Har kaysi pech sexining
atmosferasiga 4500kkal/soat issiqlik beradi. Agar shamollatgich bo`lmasa,
unda bunday issiqlik ajratishi natijasida sexdagi harorat+26
0
S gacha
ko`tariladi. Agarda tashqi havo +15
0
S ni tashkil etsa. Sexdagi havoharoratini
pasaytirish uchun shamollatgichni ish unumdorligini hisoblash kerak .
yuqoridagiformulaga
va
22-jadval
asosan
shamollatgichning
ish
unumdorligini topamiz :
L= Q
ortiqcha
/ C(t
ichki
– t
tashki
)*
tashki
= 4500*3/ 0/24(26-15)*1.226=4179
m3/soat
Ayrim ishlab chiqarish xonalarida katta miqdordagi suv bug’lari ajralib
chiqadi, natijada havoni namligi oshadi. Agarda bunday xonalardagi havo
shamollatgich bilan surilsa,unda namlikni me`yoriy chegarasida saqlab turish
mumkin.
Xonadagi havoning namlik holati absolyut va nisbiy namlik bilan
harakterlanadi.
Absolyut namlik, belgilangan haroratda 1kg havoni tajribada qancha
miqdorda suv bug’lari grammlarda borligini ko`rsatadi. Havoning tarkibidagi
suv bug’larining maksimal bo`lishi 22-jadvalda keltirilgan .
Nisbiy namlik
- bu berilgan haroratda havoni tarkibidagi xaqiqiy suv
bug’larining , maksimal mumkin bo`lgan miqdordagi suv bug’lariga
foizli nisbati.
=qf/qt *100 (16)
65
Bu erda
- havoni nisbiy namligi, %;
qf -xonaning berilgan haroratida havotarkibidagi suv bug’larining miqdori ,
g/m3;
qt- xonaning berilgan haroratida havo tarkibida maksimal mumkin bo`lgan
suv bug’larining miqdori, g/m3;
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