Upload
tanasescu-marius
View
813
Download
23
Embed Size (px)
Citation preview
Fisier propriu pentru calcule rapide-Marius TanasescuTHE POWER OF SCIENCE
1.Stabilire debite masice/volumice de apa in functie de fluxul de caldura transportat la tevi PPR+AL:
Q,[
W]
θt,[
˚C]
θr,[
˚C]
100000 90 70 20 80 971.72 4185.85 1.194501 1.229264 4.425351100000 70 50 20 60 983.21 4174.98 1.197611 1.218062 4.385022100000 60 40 20 50 988.063 4170 1.199041 1.213527 4.368696100000 7 12 5 9.5 999.7704 4193 4.769855 4.77095 17.17542
207000 7 12 5 9.5 999.7704 4193 9.873599 9.875866 35.55312
2.Calcul densitate apa in functie de temperatura:
θm-3
,986
3
(θm
-3,9
863)
↑2
θm+
288,
94
θm+
68,1
2963
5089
29,2
*(θm
+68
,129
63)
Δθ=
θt-θ
r,[˚
C]
Tem
pera
tura
med
ie a
pa:
θ
m=
(θt
+θr
)/2,
[˚C
]
Den
sita
tea
apei
la
tem
pera
tura
m
edie
:ρm
[Kg/
m³]
Cal
dura
spe
cific
a a
apei
la
tem
pera
tura
med
ie
J/kg
x°C
Deb
it m
asic
Gh,
[Kg/
sec]
Deb
it vo
lum
ic
Gh,
[L/s
ec]
Deb
it vo
lum
ic
Gh,
[m³/
h]
Tem
pera
tura
med
ie a
pa:
θm=
(θt
+θr
)/2,
[˚C
]
(θm
+28
8,94
) x
(θm
-3,
9863
)↑2
Den
sita
tea
apei
la
tem
pera
tura
m
edie
:ρm
[Kg/
m³]
60 56.01 3138 348.94 128.12963 1094811 65208910 983.2107
Caldura specifica a apei la diferite temperaturi:
0 5 10 15 18 20 25 304218 4200.9 4188.4 4180 4176 4175.57 4170.8 4168.71
Tabel 1Unitati de masura pentru presiune si valoarea lor echivalenta in [Pa]:
1 bar 1 torr 1 psi
9.81 98100 133,32 9.81
1 bar 100000 Pa y x
x= 9807y= 0.0981
Temperatura,[˚C}:Caldura specifica J / kg x˚C:
1 kgf/m²1 kgf/cm²(at) 1 mmH2O 1 ft H2O
Pa(N/m²) 10⁵ 3,34 / 10⁴ 1,45 / 10⁴
psi=pounds/inch²
10197.2 mmH2O 10.1972 mH2O1 mH2O
.=> 1mH2O=9806.6 Pa
.=> 1mH2O=0.098066 bari=98.066 mbari
Viteza de circulatie a apei , in [m/s],prin conducta de PPR cu insertie de aluminiu:
0.0144 0.0180 0.0230 0.0288 0.0362 0.0456 0.0542 0.0650
0.0002074 0.000324 0.000529 0.000829 0.00131044 0.002079 0.002938 0.004225
0.00122926 7.5518014 4.8331529 2.9601919 1.88795 1.1949738558 0.753088 0.533061 0.3706370.00121806 7.4829816 4.7891082 2.9332156 1.870745 1.1840840202 0.746225 0.528203 0.3672590.00121353 7.4551206 4.7712772 2.9222945 1.86378 1.179675378 0.743447 0.526237 0.3658920.00477095 29.309622 18.758158 11.488929 7.327406 4.6378645511 2.922843 2.068886 1.438495
0.00987587 60.670918 38.829387 23.782082 15.16773 9.6003796208 6.050285 4.282595 2.977686
Φ20
(Φin
t=14
,4m
m)
Φ25
(Φin
t=18
mm
)
Φ32
(Φin
t=23
mm
)
Φ40
(Φin
t=28
,8m
m)
Φ50
(Φin
t=36
,2m
m)
Φ63
(Φin
t=45
,6m
m)
Φ75
(Φin
t=54
,2m
m)
Φ90
(Φin
t=65
,0m
m)
Deb
it vo
lum
ic
Gh,
[m³/
s]
Viteze recomandate in [m/s] pentru circulatia apei prin conducte din otel negre,conform I13/2002,tabel 17.2
pag 88
3/8" 0,2…..0,35 x1/2" 0,2…..0,4 x3/4" 0,3…..0,45 x1" 0,3…..0,6 0,4…..0,7
11/4" 0,5…..0,65 0,5…..0,7511/2" 0,5…..0,7 0,5…..0,82" 0,5…..0,8 0,55…..163…..76 0,5…..0,9 0,6…..1,1083…..95 0,65…..1,10 0,7…..1,15102…..127 0,7…..1,15 0,9…..1,35133…..152 0,9…..1,35 1,2…..1,7168…..219 1,2…..1,7 1,4…..2,0
35 40 45 55 60 65 70 75 804167.88 4167.88 4168.71 4172.48 4174.98 4177.49 4180.49 4182.93 4185.85
Diametrul nominal (inch sau mm)
Retele interioare
Retele exterioare
Viteza de circulatie a apei , in [m/s],prin conducta de PPR cu insertie de aluminiu:
0.07960
0.006336
0.2471440.2448910.243980.9592
1.985544
Φ110(
Φin
t=79
,6m
m)
854188.75