1.진공펌프의 용량 계산방법

예를들면진공용기중의임의의흡입GAS(Mw=50,SUCTIONTEMP.=40C)
15Kg/Hr를운전진공도5Torr에서배기시키려면

S(m3/hr)=Wtx[{22.4x760x(273+T1)}/(MwxP2x273)]----fomular(1)
=15x[{22.4x760x(273+40)}/(50x5x273)]=1,171m3/hr=19.5m3/min

S(L/Sec)=V/P-----fomular(2)
V(TorrL/Sec)=17.3x(273+T1)/MwxWt----fomular(3)
V=17.3x(273+40)/50x15=1,624.47(TorrL/Sec)
운전진공도(P2)5Torr베서배기시키고자하면
S=V/P=1,624.47/5=324.8(L/Sec)=19.49m3/min

위식에서알수있듯이처리하고자하는물질이1가지일경우에는(1)식을이용하는것이좋고,반응중처리하고자물질이여러가지일경우에는(2),(3)식을이용하면간단히용량계산이가능합니다.

2.진공하에서최소관경의계산

A(cm²)=Wt/(0.210xP2)/√(T1/Mw)
=15/(0.210x5)/√{(273+40)/50}=35.74cm2
D=√(A/0.7854)=6.7cm=67mm이상의관경을설치해야한다.