Kusankha m'mimba mwake mwa njira yolowera mpweya mumgodi (2)

1. Kutsimikiza kwa mainchesi a njira yolowera mpweya mumgodi

1.1 Mtengo wogulira njira yolowera mpweya

Pamene kukula kwa njira yolowera mpweya mu migodi kumawonjezeka, zinthu zofunika zimakweranso, motero mtengo wogulira njira yolowera migodi umakweranso.Malinga ndi kusanthula kwa ziwerengero za mtengo woperekedwa ndi wopanga ma duct olowera mpweya mu mgodi, mtengo wa ngalande yolowera mpweya mu migodi ndi m'mimba mwake wa ngalande yolowera mpweya mu migodi ndi mizere motere:

C1 = (a + bd) L( 1 )

Kumeneko,C1- mtengo wogula wa mgodi wolowera mpweya wabwino, CNY; a- kuchuluka kwa mtengo wa njira yolowera mpweya mu mgodi pa kutalika kwa unit, CNY/m;b- mtengo woyambira wautali wagawo ndi mainchesi ena a njira yolowera mpweya mu mgodi;d- awiri a migodi mpweya mpweya ngalande, m;L- Kutalika kwa njira yogulitsira mpweya wabwino wamigodi, m.

1.2 Mtengo wopangira migodi wolowera mpweya wabwino

1.2.1 Kusanthula kwa magawo a mpweya wabwino

Kukaniza kwa mphepo kwa mayendedwe a mpweya wa mine kumaphatikizapo kukana kwa mphepoR_fvza njira yolowera mpweya mu mgodi komanso kukana kwa mphepo komwekoR_ev, kumene kukana mphepo yam'deraloR_evkumaphatikizapo kukana kwa mphepoR_jo, kulimbana ndi mphepo yamkunthoR_bendi migodi mpweya wodutsa ngalande outlet kukana mphepoR_ou(kusindikiza-mu mtundu) kapena kukana mphepo yoloweraR_in(mtundu wochotsa).

Mphepo yonse yolimbana ndi makina osindikizira mu mgodi ndi:

(2)

Mphamvu yonse yolimbana ndi mphepo ya exhaust mine ventilation duct ndi:

(3)

Kumene:

Kumene:

L- kutalika kwa njira yolowera mpweya mu mgodi, m.

d- m'mimba mwake mwa njira yolowera mpweya wabwino, m.

s- gawo laling'ono la mgodi wolowera mpweya wabwino, m².

α- Coefficient of frictional resistance of mine ventilation duct, N · s²/m⁴.The roughness wa mkati khoma la zitsulo mpweya wabwino ngalande ndi pafupifupi yemweyo, kotero ndiαmtengo umangogwirizana ndi m'mimba mwake.Ma coefficients olimbana ndi ma ducts oyenda bwino komanso ma ducts opumira okhala ndi mphete zolimba amakhudzana ndi kuthamanga kwa mphepo.

ξ_jo- gawo la kukana kwa malo olumikizirana ndi mpweya wabwino wa mgodi, wopanda mawonekedwe.Pamene aliponMalunji muutali wonse wa njira yopumira mpweya wa mgodi, kuchuluka kwa kukana kwamaloko kumawerengedwa molingana ndin ndi_jo.

 n- chiwerengero cha mfundo za mgodi mpweya wabwino ngalande.

ξ_bs- coefficient kukana m'deralo pa kutembenuka kwa mgodi mpweya mpweya ngalande.

ξ_ou- kukana kokwanira komweko potuluka panjira yolowera mpweya wa mgodi, tenganiξ_ou= 1.

ξ_in- coefficient kukana kwanuko polowera kwa mgodi wolowera mpweya wabwino,ξ_in= 0.1 pamene cholowera chazunguliridwa kwathunthu, ndiξ_in= 0.5 - 0.6 pamene cholowera sichikuzunguliridwa pakona yoyenera.

ρ- kachulukidwe ka mpweya.

M'malo opumira am'deralo, mphamvu yonse ya mphepo yamkuntho ya mgodi wolowera mpweya imatha kuyerekezedwa kutengera kulimba kwa mphepo yonse.Nthawi zambiri amakhulupirira kuti kuchuluka kwa kukana kwa mphepo yam'deralo komwe kumalumikizana ndi njira yolowera mpweya, kukana kwa mphepo yam'deralo, komanso kukana kwa mphepo potulukira (mtundu wa makina osindikizira) kapena kukana mphepo yolowera (mtundu wochotsa) Njira yolowera mpweya mu mgodi ndi pafupifupi 20% ya mphamvu yonse yolimbana ndi mphepo yamkuntho ya ngalande yolowera mpweya mumgodi.Mphamvu yonse ya mphepo yamkuntho ya mpweya wabwino wa migodi ndi:

(4)

Malingana ndi zolembazo, mtengo wa friction resistance coefficient α wa fan duct ukhoza kuonedwa ngati wokhazikika.Theαmtengo wa zitsulo mpweya mpweya ngalande akhoza kusankhidwa malinga ndi Table 1;Theαmtengo wa JZK mndandanda FRP mpweya ngalande akhoza kusankhidwa malinga Table 2;The frictional resistance coefficient of the flexible ventilation duct and flexible ventilation duct yokhala ndi chigoba cholimba chimagwirizana ndi kuthamanga kwa mphepo pakhoma, frictional resistance coefficient.αmtengo wa flexible ventilation duct ukhoza kusankhidwa molingana ndi Table 3.

Table 1 Frictional resistance coefficient of metal ventilation duct

Table 2 Frictional resistance coefficient of JZK series FRP centilation duct

Table 3 The coefficient of frictional resistance of the flexible ventilation duct

Zipitilizidwa…