Amapharamitha ayinhloko, isici kufeni, anezinombolo ezine: Amandla (V) Ukucindezela (p) Ukusebenza kahle (n) Isivinini sokuzungezisa (n min.-1)
Umthamo inani loketshezi olunyakaziswa yisiphepho, ngevolumu, phakathi neyunithi yesikhathi, futhi ngokuvamile luvezwa ngo-m.3/h, m3/min., m3/isekhondi.
Ingqikithi yokucindezela (pt) iyisamba sengcindezi emile (pst), okungukuthi amandla adingekayo ukuze amelane nokungqubuzana okuphambene nesistimu, kanye nokucindezela okuguquguqukayo (pd) noma amandla e-kinetic anikezwa uketshezi olunyakazayo (pt = pst + pd ).Ingcindezi eguquguqukayo incike kukho kokubili isivinini soketshezi (v) kanye namandla adonsela phansi athile (y).
Kuphi:
pd= ingcindezi enamandla (Pa)
y=isisindo esithile soketshezi(Kg/m3)
v= isivinini soketshezi ekuvuleni kwefeni okusetshenzwe isistimu (m/sec)
Kuphi:
V= umthamo(m3/sec)
A= igeji yokuvula esetshenziswe uhlelo (m2)
v= isivinini soketshezi ekuvuleni kwefeni okusetshenzwe isistimu(m/sec)
Ukusebenza kahle isilinganiso phakathi kwamandla atholwa ifeni kanye nokokufaka kwamandla enjini yokushayela ifeni
Kuphi:
n= ukusebenza kahle (%)
V= umthamo (m3/sec)
pt= amandla amuncwa (KW)
P= isamba sokucindezela (daPa)
Isivinini sokuzungezisa inombolo yokuguquguquka okufanele i-impeller yabalandeli ikwazi ukuhlangabezana nezidingo zokusebenza.
Njengoba inani lama-revolution lihluka (n), kuyilapho amandla adonsela phansi oketshezi ehlala azinzile (?), ukuhluka okulandelayo kwenzeka:
Umthamo (V) ulingana ngokuqondile nesivinini sokuzungezisa, ngakho-ke:
Kuphi:
n= isivinini sokuzungeza
V= umthamo
V1= umthamo omusha otholwe ngokuhlukahluka kwejubane lokuzungezisa
n1= isivinini esisha sokuzungezisa
Kuphi:
n= isivinini sokuzungeza
pt= ingcindezi ephelele
pt1= isamba sokucindezela esisha esitholwe ekuhlukeni kwejubane lokuzungezisa
n1= isivinini esisha sokuzungezisa
Amandla amuncwa (P) ayahlukahluka nge-cube yokujikeleza isilinganiso, ngakho-ke:
Kuphi:
n= isivinini sokuzungeza
P = abs.amandla
P1= okokufaka kukagesi okusha okutholwe ngokuhlukahluka kwejubane lokuzungezisa
n1= isivinini esisha sokuzungezisa
Amandla adonsela phansi athile (y) angase abalwe ngefomula elandelayo
Kuphi:
273= uziro ngokuphelele(°C)
t= izinga lokushisa loketshezi(°C)
y= amandla adonsela phansi athize komoya ku-t C(Kg/m3)
Pb= ingcindezi ye-barometric (mm Hg)
13.59= amandla adonsela phansi e-mercury ku-0 C(kg/dm3)
Ukuze kube lula ukubala, isisindo somoya emazingeni okushisa ahlukahlukene nokuphakama kwe-asl sifakiwe kuthebula elingezansi:
| Izinga lokushisa | ||||||||||||
| -40°C | -20°C | 0°C | 10°C | 15°C | 20°C | 30°C | 40°C | 50°C | 60°C | 70°C | ||
| Ubude ngenhla izinga lolwandle ngamamitha | 0 | 1,514 | 1,395 | 1,293 | 1,247 | 1,226 | 1,204 | 1,165 | 1,127 | 1,092 | 1,060 | 1,029 |
| 500 | 1,435 | 1,321 | 1,225 | 1,181 | 1,161 | 1,141 | 1,103 | 1,068 | 1,035 | 1,004 | 0,975 | |
| 1000 | 1,355 | 1,248 | 1,156 | 1,116 | 1,096 | 1,078 | 1,042 | 1,009 | 0,977 | 0,948 | 0,920 | |
| 1500 | 1,275 | 1,175 | 1,088 | 1,050 | 1,032 | 1,014 | 0,981 | 0,949 | 0,920 | 0,892 | 0,866 | |
| 2000 | 1,196 | 1,101 | 1,020 | 0,984 | 0,967 | 0,951 | 0,919 | 0,890 | 0,862 | 0,837 | 0,812 | |
| 2500 | 1,116 | 1,028 | 0,952 | 0,919 | 0,903 | 0,887 | 0,858 | 0,831 | 0,805 | 0,781 | 0,758 | |
| Izinga lokushisa | ||||||||||||
| 80°C | 90°C | 100°C | 120°C | 150°C | 200°C | 250°C | 300°C | 350°C | 400°C | 70C | ||
| Ubude ngenhla izinga lolwandle ngamamitha | 0 | 1,000 | 0,972 | 0,946 | 0,898 | 0,834 | 0,746 | 0,675 | 0,616 | 0,566 | 0,524 | 1,029 |
| 500 | 0,947 | 0,921 | 0,896 | 0,851 | 0,790 | 0,707 | 0,639 | 0,583 | 0,537 | 0,497 | 0,975 | |
| 1000 | 0,894 | 0,870 | 0,846 | 0,803 | 0,746 | 0,667 | 0,604 | 0,551 | 0,507 | 0,469 | 0,920 | |
| 1500 | 0,842 | 0,819 | 0,797 | 0,756 | 0,702 | 0,628 | 0,568 | 0,519 | 0,477 | 0,442 | 0,866 | |
| 2000 | 0,789 | 0,767 | 0,747 | 0,709 | 0,659 | 0,589 | 0,533 | 0,486 | 0,447 | 0,414 | 0,812 | |
| 2500 | 0,737 | 0,716 | 0,697 | 0,662 | 0,615 | 0,550 | 0,497 | 0,454 | 0,417 | 0,386 | 0,758 | |
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