I Iune, 2018, ʻO kekahi o kā mākou mea kūʻai aku ma Pakistan, Karachi, pono lākou i ka rotameter tube metala no ke ana ʻana i ka oxygen.
ʻO kā lākou kūlana hana e like me lalo:
Paipu:φ70*5，Max. Kahe 110m3/h，Mini.flow 10m3/h，ke kaomi hana 1.3MPa，hana wela 30℃，ke kaomi barometric kūloko 0.1MPa.
ʻO kā mākou helu helu ma lalo nei:
①Oxygen density:
Ma lalo o ke kūlana maʻamau:ρ20=1.331kg/m3
Ma lalo o ke kūlana hana:ρ1=ρ20*(P1T20/PNT1Z)=1.331*{(1.3+0.1)*(27*+20)/[0.1013*(27*+30)*0.992]｝=17.93kg/ m3
②Ke kahe maoli:
QS=Q20ρ20/ρ
QSmax=Q20maxρ20/ρ1=110*1.331/17.93=8.166
QSmin=Q20minρ20/ρ1=10*1.331/17.93=0.742
③ ʻO ke ʻano o ke kūlana hana maoli ka pahu metala rotameter:
QNmax=QSmax/0.2696=8.166/0.2696=30.29
QNmin=QSmax/0.2696=0.742/0.2696=2.75
Ma lalo o kā mākou helu ʻana, ka hana maikaʻi loa a me ka mana maikaʻi loa, ma hope o ka hoʻokomo ʻana, hana maikaʻi ia, hoʻomaikaʻi ia i ka hana o ka mea hoʻohana hope, ʻike nui ʻia ka maikaʻi o nā huahana e kā mākou mea kūʻai.
