Babban ma'auni, halayen fan, sune lambobi huɗu: Ƙarfi (V) Matsi (p) Ƙarfi (n) Saurin juyawa (n min.-1)
Ƙarfin shine adadin ruwan da fan ya motsa, a cikin girma, a cikin raka'a na lokaci, kuma yawanci ana bayyana shi a cikin m3/h, m3/min., m3/sec.
Jimlar matsa lamba (pt) ita ce jimlar matsa lamba (pst), watau makamashin da ake buƙata don jure jure rashin jituwa daga tsarin, da matsa lamba mai ƙarfi (pd) ko kuzarin motsa jiki da aka ba da ruwa mai motsi (pt = pst + pd). ).Matsi mai ƙarfi ya dogara da saurin ruwa (v) da takamaiman nauyi (y).
Inda:
pd= matsa lamba mai ƙarfi (Pa)
y= takamaiman nauyi na ruwa (Kg/m3)
v= saurin ruwa a buɗaɗɗen fan da tsarin ke aiki (m/sec)
Inda:
V= iya aiki (m3/sec)
A= ma'aunin buɗewar da tsarin ya yi aiki (m2)
v= saurin ruwa a buɗaɗɗen fan da tsarin ya yi (m/sec)
Ingancin shine rabo tsakanin makamashin da fan ya samar da kuma shigar da kuzari zuwa injin tuki fan
Inda:
n= iya aiki (%)
V= iya aiki (m3/sec)
pt = ikon sha (KW)
P= jimlar matsa lamba (daPa)
Gudun jujjuyawa shine adadin jujjuyawar da mai kunna fan zai gudana don biyan buƙatun aiki.
Kamar yadda adadin juyin juya halin ya bambanta (n), yayin da takamaiman nauyin ruwa ke ci gaba da tsayawa (?), bambance-bambance masu zuwa suna faruwa:
Ƙarfin (V) kai tsaye ya yi daidai da saurin juyawa, don haka:
Inda:
n= gudun juyawa
V= iya aiki
V1= sabon ƙarfin da aka samu akan bambancin saurin juyawa
n1= sabon gudun juyawa
Inda:
n= gudun juyawa
pt= jimlar matsa lamba
pt1= sabon jimlar matsa lamba da aka samu akan bambancin saurin juyawa
n1= sabon gudun juyawa
Ƙarfin da aka sha (P) ya bambanta da kube na juyi, don haka:
Inda:
n= gudun juyawa
P= ba.iko
P1= sabon shigar da wutar lantarki da aka samu akan bambancin saurin juyawa
n1= sabon gudun juyawa
Ana iya ƙididdige takamaiman ƙarfin nauyi (y) tare da dabara mai zuwa
Inda:
273= cikakkiyar sifili(°C)
t= zafin jiki (°C)
y = ƙayyadaddun ƙarfin iska a t C (Kg/m3)
Pb= matsa lamba barometric (mm Hg)
13.59 = takamaiman nauyi na mercury a 0 C (kg/dm3)
Don sauƙin lissafi, nauyin iska a yanayin zafi daban-daban da tsayin asl an haɗa su a cikin teburin da ke ƙasa:
Zazzabi | ||||||||||||
-40°C | -20°C | 0°C | 10°C | 15°C | 20°C | 30°C | 40°C | 50°C | 60°C | 70°C | ||
Tsayi a sama matakin teku a cikin mita | 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 |
Zazzabi | ||||||||||||
80°C | 90°C | 100°C | 120°C | 150°C | 200°C | 250°C | 300°C | 350°C | 400°C | 70C | ||
Tsayi a sama matakin teku a cikin mita | 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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