1. Kutsunga kwedhayamita yehupfumi mugodhi wemhepo wemhepo
1.1 Mutengo wekutenga mugodhi wekufemesa mweya
Sezvo dhayamita yemugodhi wemhepo yekufefetera ichiwedzera, zvinhu zvinodiwa zvinowedzerawo, saka mutengo wekutenga wemugodhi wemhepo unokwira zvakare.Zvinoenderana nekuongorora kwehuwandu hwemutengo wakapihwa nemugadziri wepamugodhi wemhepo inofefetera, mutengo wemugodhi wekufemesa mhepo uye dhayamita remugodhi wekufemesa mhepo zvine mutsetse sezvinotevera:
C1 = (a + bd) L( 1)
Kupi,C1- mutengo wekutenga wemugodhi wemhepo yekufefetera, CNY; a- yakawedzera mutengo wemugodhi wemhepo yekufefetera pahurefu hweyuniti, CNY/m;b- yakakosha mutengo coefficient yehurefu hweyuniti uye imwe dhayamita yemugodhi wekufema wemhepo;d- dhayamita yemugodhi wekufambisa mhepo, m;L- Kureba kweyakatengwa migodhi yekufemesa duct, m.
1.2 Migodhi yekufemesa duct mhepo mutengo
1.2.1 Ongororo yenzvimbo yekufefetera paramita
Kupokana nemhepo kwemugodhi wekufemesa mhepo kunosanganisira kukwesha kwemhepoRfvyemugodhi wekufefetera mhepo uye kudzivirira kwemhepo yemunoRev, uko kupikisa kwemhepo yemunharaundaRevzvinosanganisira kubatana kwemhepo kudziviriraRjo, mhepo yegokoraRbeuye migodhi yekufefetera duct outlet wind resistanceRou(press-in type) kana kuti inlet wind resistanceRin(kubvisa mhando).
Kupokana kwemhepo kweiyo press-in mine ventilation duct ndeye:
(2)
Kupokana kwemhepo kweiyo exhaust mine ventilation duct ndeye:
(3)
Kupi:
Kupi:
L- kureba kwemugodhi wekufema wemhepo, m.
d- dhayamita yemugodhi wemhepo yekufefetera, m.
s- nzvimbo yemuchinjikwa-chikamu chemugodhi wemhepo yemhepo, m2.
α– Coefficient of frictional resistance ye mine ventilation duct, N · s2/m4.Kushata kwemukati memadziro esimbi yekufemesa duct inenge yakafanana, saka iyoαkukosha kunongoenderana nedhayamita.Iyo frictional resistance coefficients yezvose zviri zviviri flexible ventilation ducts uye flexible ventilation ducts ane mhete dzakaoma ane hukama nemhepo.
ξjo- iyo yenharaunda yekudzivirira coefficient yemugodhi wemhepo inopinza duct joint, isina dimension.Kana variponmajoini muhurefu hwese hwemugodhi wekufema wemhepo, iyo yakazara yenzvimbo yekupikisa coefficient yemajoini inoverengerwa zvinoenderana nenξjo.
n- nhamba yemajoini emugodhi wekufema wemhepo.
ξbs- nharaunda yekupikisa coefficient pakutendeuka kwemugodhi wemhepo wemhepo.
ξou- nharaunda yekupikisa coefficient pakubuda kwemugodhi wemhepo yekufema, toraξou= 1.
ξin- yenzvimbo yekupikisa coefficient pakupinza kwemugodhi wemhepo yekufema,ξin= 0.1 kana inlet yakatenderedzwa zvachose, uyeξin= 0.5 – 0.6 kana chinopinza chisina kutenderedzwa pakona chaipo.
ρ- kusimba kwemhepo.
Mukufefetedza kwenzvimbo, kurwiswa kwemhepo kwemugodhi wekufemesa kwemugodhi kunogona kufungidzirwa zvichibva pakupokana kwemhepo.Zvinowanzotendwa kuti huwandu hwekupokana nemhepo yemuno yejoint ye mine ventilation duct, mhepo yemuno inopokana nekutendeuka, uye kuramba kwemhepo kwekubuda (press-in type) kana inlet mhepo kuramba (kubvisa mhando) emugodhi wekufemesa mhepo inosvika makumi maviri kubva muzana yekupokana kwemhepo yese yemugodhi wekufemesa mugodhi.Kupokana kwemhepo kwemhepo yemugodhi ndiko:
(4)
Maererano nezvinyorwa, kukosha kwe frictional resistance coefficient α ye fan duct inogona kuonekwa sechinhu chinogara chiripo.Theαkukosha kwesimbi yekufambisa duct inogona kusarudzwa maererano neTafura 1;Theαkukosha kweJZK series FRP ventilation duct inogona kusarudzwa maererano neTafura 2;Iyo frictional resistance coefficient ye flexible ventilation duct uye flexible ventilation duct ine rigid skeleton ine hukama nekumanikidza kwemhepo kumadziro, frictional resistance coefficient.αkukosha kweiyo flexible ventilation duct inogona kusarudzwa maererano neTafura 3.
Tafura 1 Frictional resistance coefficient of metal ventilation duct
| Kubvisa dhayamita (mm) | 200 | 300 | 400 | 500 | 600 | 800 |
| α× 104/( N·s2·m-4 ) | 49 | 44.1 | 39.2 | 34.3 | 29.4 | 24.5 |
Tafura 2 Frictional resistance coefficient yeJZK series FRP centilation duct
| Ducting type | JZK-800-42 | JZK-800-50 | JZK-700-36 |
| α× 104/( N·s2·m-4) | 19.6-21.6 | 19.6-21.6 | 19.6-21.6 |
Tafura 3 The coefficient of frictional resistance of the flexible ventilation duct
| Kubvisa dhayamita (mm) | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 |
| α× 104/N·s2·m-4 | 53 | 49 | 45 | 41 | 38 | 32 | 30 | 29 |
Zvichaenderera mberi…
Nguva yekutumira: Jul-07-2022
