3. Kusarudzwa kwemidziyo yemhepo
3.1 Kuverengera kweakakodzera ma parameter eiyo ducting
3.1.1 Mhepo kuramba kwetunnel yekufefetera ducting
Kupokana kwemhepo kwemugero wekufemesa kwemhepo kunosanganisira kupokana kwemhepo, kupindirana kwemhepo, kupikisa kwemhepo kwegokora remhepo yekufemesa, mugero weventilation duct kubuda mhepo kuramba (press-in ventilation) kana mugero wemhepo wekupinda mukati. (kubvisa kufefetedza), uye zvinoenderana nenzira dzakasiyana dzekufemesa, kune anoenderana akaomesesa ekuverenga mafomula.Zvisinei, mukushandiswa kunoshanda, kupikisa kwemhepo yetunnel ventilation duct haisi kungoenderana chete nezvinhu zviri pamusoro apa, asiwo zvakanyatsoenderana nehutano hwehutungamiri hwakadai sekurembera, kuchengetedza, uye kudzvinyirira kwemhepo kwemugero wemhepo.Naizvozvo, zvinonetsa kushandisa inoenderana calculation formula yekuverenga chaiko.Zvinoenderana neavhareji yakayerwa kupikisa kwemhepo ye100 metres (kusanganisira yemuno mhepo kuramba) sedata rekuyera kunaka kwehutungamiriri uye magadzirirwo emugero wekufemesa.Ivhareji yemhepo inopikisa mamita 100 inopiwa nemuiti mutsanangudzo yezvigadzirwa zvefekitari.Naizvozvo, iyo tunnel ventilation duct mhepo inopikisa kuverenga formula:
R=R100•L/100 Ns2/m8(5)
Kupi:
R - Mhepo inopokana netunnel ventilation duct,Ns2/m8
R100- Avhareji yemhepo inopokana neye tunnel ventilation duct 100 metres, mhepo inopikisa mu100m kwenguva pfupi,Ns2/m8
L - Kutora kureba, m, L / 100 inoumba coefficient yeR100.
3.1.2 Kubuda kwemhepo kubva pamukoto
Mumamiriro ezvinhu akajairwa, kudonha kwemhepo kwesimbi uye epurasitiki madhiraini ekufema ane kushoma kwemhepo kupinza kunowanzo kuitika pajoini.Chero bedzi kurapwa kwakabatana kuchisimbiswa, kubuda kwemhepo kuduku uye kunogona kuregererwa.Iyo PE ventilation ducts ine mhepo inodonha kwete chete pamajoini asiwo pamadziro edhiza uye pinhole yehurefu hwakazara, saka kubuda kwemhepo kwetunnel ventilation ducts kunoenderera uye hakuna kuenzana.Kudonha kwemhepo kunokonzeresa kuwanda kwemhepoQfpamucheto wekubatanidza wevheti yemhepo uye fan kuti ive yakasiyana nemhepo yemhepoQpadhuze nemagumo ekubuda kweiyo ventilation duct (kureva, huwandu hwemhepo hunodiwa mumugero).Nokudaro, iyo geometric inoreva yehuwandu hwemhepo pakutanga uye pakupedzisira inofanira kushandiswa sehuwandu hwemhepoQaichipfuura nepamhepo yemhepo duct, zvino:
(6)Zviripachena, mutsauko pakati peQfuye Q ndiyo tunnel ventilation duct uye kubuda kwemhepoQL.zvinova:
QL=Qf-Q(7)
QLine hukama nemhando yetunnel ventilation duct, huwandu hwemajoini, nzira uye manejimendi emhando, pamwe nedhayamita remugero wemhepo yekufefetera, kumanikidza kwemhepo, nezvimwewo, asi inonyanya kuenderana nekuchengetedza uye manejimendi. iyo tunnel ventilation duct.Kune matatu index paramita kuratidza dhigirii rekudonha kwemhepo kweiyo ventilation duct:
a.Kubuda kwemhepo kwetunnel ventilation ductLe: Iyo muzana yekudonha kwemhepo kubva mugero rekufefetera duct kune inoshanda mhepo vhoriyamu ye fan, iyo inoti:
Le=QL/Qfx 100%=(Qf-Q)/Qfx 100%(8)
Kunyange zvazvo Leinogona kuratidza kubuda kwemhepo kweimwe tunnel ventilation duct, haigone kushandiswa seyekuenzanisa index.Naizvozvo, iyo 100 metres mhepo yekudonha chiyeroLe100rinonyanya kushandiswa kutaura:
Le100=[(Qf-Q)/Qf•L/100] x 100%(9)
Iyo 100 metres yemhepo yekuvuza mwero weiyo tunnel ventilation duct inopihwa nemugadziri we duct mune paramende tsananguro yechigadzirwa chefekitori.Zvinowanzodiwa kuti iyo 100 metres yemhepo yekudonha kwemhepo yeino flexible ventilation duct inofanirwa kusangana nezvinodiwa patafura inotevera (ona Tafura 2).
Tafura 2 Iyo 100 mita yemhepo yekudonha mwero weiyo inochinjika kufefetera duct
| Chinhambwe chemhepo (m) | <200 | 200-500 | 500-1000 | 1000-2000 | >2000 |
| Le100(%) | <15 | <10 | <3 | <2 | <1.5 |
b.Iyo inoshanda yemhepo vhoriyamu mweroEfyemugero wekufemesa mhepo: ndiko kuti, chikamu chemugero wekufefetera vhoriyamu yechiso chinotenderera kusvika kumhepo inoshanda yefeni.
Ef=(Q/Qfx 100%
=[(Qf-QL)/Qf] x 100%
=(1-Le) x 100%(10)
Kubva pakuenzanisa (9):Qf=100Q/(100-L•Le100) (11)
Tsiva equation (11) kuita equation (10) kuti uwane:Ef=[(100-L•Le100)] x100%
=(1-L•Le100/100) x100% (12)
c.Air leakage reserve coefficient ye tunnel ventilation ductΦ: Kureva, kudzokororwa kweiyo inoshanda yemhepo vhoriyamu mwero we tunnel ventilation duct.
Φ=Qf/Q=1/Ef=1/(1-Le)=100/(100-L•Le100)
3.1.3 Tunnel kufefetedza dhayamita
Kusarudzwa kwedhayamita yetunnel ventilation duct kunoenderana nezvinhu zvakaita sehuwandu hwemhepo, kureba kwemhepo uye ukuru hwechikamu chemugero.Mumashandisirwo anoshanda, iyo dhayamita yakajairwa inonyanya kusarudzwa zvichienderana nemamiriro ekufananidza nedhayamita yeiyo fan yekubuda.Nekuenderera mberi kwekuvandudza tekinoroji yekuvaka tekinoroji, migero yakawanda uye yakareba inocherwa nezvikamu zvizere.Kushandiswa kwemadhayamita madhayamita ekugadzira mhepo yekuvaka kunogona kurerutsa zvakanyanya nzira yekuvaka mugero, iyo inobatsira kusimudzira uye kushandiswa kwechikamu-chakazara chekuchera, inogonesa kuumbwa kweimwe-nguva yemakomba, inochengetedza akawanda manpower uye zvinhu, uye inorerutsa zvakanyanya. kufefetera manejimendi, inova mhinduro kumatanho marefu.Yakakura-diameter tunnel ventilation ducts ndiyo nzira huru yekugadzirisa refu tunnel yekuvaka ventilation.
3.2 Sarudza maitiro ekushanda efani inodiwa
3.2.1 Sarudza huwandu hwemhepo inoshanda yefeniQf
Qf=Φ•Q=[100/(100-L•Le100)]•Q (14)
3.2.2 Sarudza kushanda kwemhepo yemhepo ye fanhf
hf=R•Qa2=R•Qf•Q (15)
3.3 Kusarudzwa kwemidziyo
Sarudzo yemidziyo yekufemesa inofanira kutanga yafunga nzira yekufemesa uye inosangana nezvinodiwa zvemhepo yemhepo inoshandiswa.Panguva imwecheteyo, pakusarudza michina, inofanirwawo kufunga kuti huwandu hwemhepo hunodiwa mumugero hunoenderana nematanho ekuita eiyo yakaverengerwa pamusoro petunnel ventilation ducts uye mafeni, kuitira kuti ive nechokwadi chekuti michina yekufemesa nemidziyo inosvika pakakwirira. kushanda zvakanaka uye kuderedza kupera kwesimba.
3.3.1 Sarudzo yefani
a.Mukusarudzwa kwemafeni, axial kuyerera mafeni anoshandiswa zvakanyanya nekuda kwehukuru hwavo hudiki, huremu huremu, ruzha rwakaderera, kuisirwa nyore uye kugona kwakanyanya.
b.Iko kushanda kwemhepo yemhepo ye fan inofanira kusangana nezvinodiwa zveQf.
c.Kushanda kwemhepo kudzvinyirirwa kwe fan kunofanira kusangana nezvinodiwa zvehf, asi haifanirwe kuve yakakura kudarika inobvumirwa kushanda kumanikidza kwe fan (iyo fekitori paramita ye fan).
3.3.2 Sarudzo yemugero wekufemesa mweya
a.Madhaivhi anoshandiswa pakuchera mugero wekufemesa akakamurwa kuita madhiri asina kuchinjika anofemesa, madhaivhi anofefetera ane skeleton dzakasimba uye madhaidhi ekufemesa akaomarara.Iyo frameless flexible ventilation duct ine huremu huremu, nyore kuchengeta, kubata, kubatanidza uye kumisa, uye ine mutengo wakaderera, asi inokodzera chete kudzvanya-mumhepo;Muchikamu chekufemesa mhepo, madhaivhi anochinjika uye akaomarara emhepo ane skeleton yakaoma anogona kushandiswa.Nekuda kwemutengo wayo wakakwira, uremu hukuru, kwete nyore kuchengeta, kutakura uye kuisirwa, kushandiswa kwekumanikidza kupinda mupasi kushoma.
b.Kusarudzwa kwemugero wemhepo inofunga kuti dhayamita yemhepo inopinza inopindirana nedhayamita yekubuda kwe fan.
c.Kana mamwe mamiriro asina kunyanya kusiyana, zviri nyore kusarudza feni ine yakaderera mhepo inopikisa uye yakaderera mhepo yekudonha chiyero che 100 metres.
Zvichaenderera mberi......
Nguva yekutumira: Kubvumbi-19-2022
