Iwo makuru ma paramita, maitiro kune fan, ari mana muhuwandu: Kugona (V) Kudzvanya (p) Kubudirira (n) Kumhanya kwekutenderera (n min.-1)
Kugona ndiko kuwanda kwemvura inofambiswa nefeni, muhuwandu, mukati mechikamu chenguva, uye inowanzoratidzwa mu m.3/h, m3/min.,m3/sec.
Iyo yakazara dzvinyiriro (pt) ndiyo uwandu hweiyo static pressure (pst), kureva simba rinodiwa kuti rimire kune zvinopesana kubva muhurongwa, uye simba remagetsi (pd) kana kinetic simba rinopihwa kune inofamba fluid (pt = pst + pd). )Simba resimba rinoenderana nekumhanya kwemvura (v) uye chaiyo giravhiti (y).
Kupi:
pd= dynamic pressure (Pa)
y=kukweva kwemvura chaiyo(Kg/m3)
v = kumhanya kwemvura pakuvhurwa kwe fan kunoshandiswa nesystem (m/sec)
Kupi:
V= kugona (m3/sec)
A= geji yekuvhura yakashandiswa nehurongwa (m2)
v= kumhanya kwemvura pakuvhurwa kwe fan kunoshandiswa nesystem (m/sec)
Iko kunyatsoita chiyero pakati pesimba rinoburitswa nefeni uye simba rekuisa kune fan inotyaira mota
Kupi:
n= kushanda zvakanaka (%)
V= kugona (m3/sec)
pt = simba rakanyura (KW)
P = kumanikidzwa kwese (daPa)
Iko kumhanya kwekutenderera huwandu hwemarevolutions iyo fan impeller inofanirwa kumhanya kuitira kuti isangane nekuita zvinodiwa.
Sezvo huwandu hwemabhindauko hunosiyana (n), nepo mvura chaiyo inokwevera pasi ichiramba yakatsiga (?), misiyano inotevera inoitika:
Iyo simba (V) yakanyatso kuenderana nekumhanya kwekutenderera, saka:
Kupi:
n= kumhanya kwekutenderera
V= kugona
V1 = hutsva hutsva hunowanikwa pakusiyana kwekumhanya kwekutenderera
n1= kumhanya kutsva kwekutenderera
Kupi:
n= kumhanya kwekutenderera
pt = kumanikidzwa kwese
pt1= kudzvanywa kutsva kwakawanikwa pakusiyana kwekumhanya kwekutenderera
n1= kumhanya kutsva kwekutenderera
Simba rakanyura (P) rinosiyana necube yekutenderera reshiyo, saka:
Kupi:
n= kumhanya kwekutenderera
P= abs.simba
P1= magetsi matsva anowanikwa pakusiyana kwekumhanya kwekutenderera
n1= kumhanya kutsva kwekutenderera
Iyo chaiyo giravhiti (y) inogona kuverengerwa neinotevera formula
Kupi:
273= zero yakakwana(°C)
t= tembiricha yemvura (°C)
y= simba rinokwevera mhepo pa t C(Kg/m3)
Pb = barometric pressure (mm Hg)
13.59= mercury chaiyo giravhiti pa0 C(kg/dm3)
Kuti zvive nyore kuverenga, huremu hwemhepo patembiricha dzakasiyana uye kureba asl zvakaverengerwa patafura pazasi:
Tembiricha | ||||||||||||
-40°C | -20°C | 0°C | 10°C | 15°C | 20°C | 30°C | 40°C | 50°C | 60°C | 70°C | ||
Urefu kumusoro mwero wegungwa mumamita | 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 |
Tembiricha | ||||||||||||
80°C | 90°C | 100°C | 120°C | 150°C | 200°C | 250°C | 300°C | 350°C | 400°C | 70C | ||
Urefu kumusoro mwero wegungwa mumamita | 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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