3. Ukukhetha imishini yokukhipha umoya
3.1 Ukubalwa kwemingcele efanele ye-ducting
3.1.1 Ukumelana nomoya wokudonsa umoya womhubhe
Ukumelana komoya komgudu wokungenisa komoya womhubhe ngokwethiyori kuhlanganisa ukumelana komoya wokungqubuzana, ukumelana komoya okuhlanganyelwe, ukumelana komoya kwendololwane komgudu wokungenisa umoya, ukumelana komoya womhubhe we-ventition outlet (ukungena komoya wokucindezela) noma ukumelana komoya womhubhe wokungenisa umoya. (ukukhipha umoya omncane), futhi ngokwezindlela ezihlukene zokungenisa umoya, kukhona amafomula okubala anzima ahambisanayo.Kodwa-ke, ekusebenzeni okungokoqobo, ukumelana komoya komgudu wokungenisa umoya womhubhe akuhlobene nje kuphela nezinto ezingenhla, kodwa futhi kuhlobene eduze nekhwalithi yokuphatha njengokulenga, ukugcinwa, nokucindezela komoya komgudu wokungenisa umoya womhubhe.Ngakho-ke, kunzima ukusebenzisa ifomula yokubala ehambisanayo ukuze ubale olunembile.Ngokwesilinganiso esilinganisiwe sokumelana komoya esingamamitha ayi-100 (okuhlanganisa ukumelana komoya wendawo) njengedatha yokukala ikhwalithi yokuphatha kanye nomklamo womgudu wokungenisa umoya womhubhe.Isilinganiso sokumelana komoya esingamamitha angu-100 sinikezwa umenzi encazelweni yemingcele yomkhiqizo wefekthri.Ngakho-ke, ifomula yokubala yokumelana nomoya womhubhe wepayipi:
R=R100•L/100 Ns2/m8(5)
Kuphi:
R - Ukumelana komoya komgudu wokungenisa umoya womhubhe,Ns2/m8
R100- Isilinganiso sokumelana komoya komhubhe wokungenisa umoya wamamitha ayi-100, ukumelana komoya ku-100m okwesikhashana,Ns2/m8
L - Ubude be-Ducting, m, L/100 buhlanganisa i-coefficient yeR100.
3.1.2 Ukuvuza komoya epayipini
Ngaphansi kwezimo ezijwayelekile, ukuvuza komoya kwensimbi nepulasitiki yokungena komoya okunokungena komoya okuncane kwenzeka ikakhulukazi endaweni yokuhlangana.Uma nje ukwelashwa okuhlangene kuqiniswa, ukuvuza komoya kuncane futhi kunganakwa.Imigudu yokungenisa umoya ye-PE inokuvuza komoya hhayi emalungeni kuphela kodwa nasezindongeni zamapayipi kanye namaphinifa obude obugcwele, ngakho ukuvuza komoya kwemigudu yokufaka umoya yomhubhe kuyaqhubeka futhi akulingani.Ukuvuza komoya kubangela umthamo womoyaQfekugcineni kokuxhuma komgudu wokungenisa umoya kanye nefeni ukuze ihluke kumthamo womoyaQeduze nendawo yokuphuma yomgudu wokungenisa umoya (okungukuthi, umthamo womoya odingekayo emhubheni).Ngakho-ke, incazelo yejometri yevolumu yomoya ekuqaleni nasekupheleni kufanele isetshenziswe njengomthamo womoyaQaUkudlula emgudwini we-ventilation, bese:
(6)Ngokusobala, umehluko phakathi kwe-Qffuthi i-Q iwumzila wokungenisa umoya womhubhe kanye nokuvuza komoyaQL.okusho ukuthi:
QL=Qf-Q(7)
QLihlobene nohlobo lomgudu wokungenisa umoya womhubhe, inani lamalunga, indlela kanye nekhwalithi yokuphatha, kanye nobubanzi bomzila wokungenisa umoya womhubhe, ingcindezi yomoya, njll., kodwa ikakhulukazi ihlobene kakhulu nokugcinwa nokuphathwa i-tunnel ventilation duct.Kunezinhlaka ezintathu zenkomba ezikhombisa izinga lokuvuza komoya komgudu wokungenisa umoya:
a.Ukuvuza komoya komgudu wokungenisa umoya womhubheLe: Iphesenti lokuvuza komoya kusukela epayipini lokungenisa umoya likamhubhe ukuya kuvolumu yomoya osebenzayo wefeni, okungukuthi:
Le=QL/Qfx 100%=(Qf-Q)/Qfx 100%(8)
Nakuba Leingabonisa ukuvuza komoya komgudu othile wokungenisa umoya womhubhe, ayikwazi ukusetshenziswa njengenkomba yokuqhathanisa.Ngakho-ke, izinga lokuvuza komoya elingamamitha ayi-100Le100ngokuvamile isetshenziselwa ukuveza:
Le100=[(Qf-Q)/Qf•L/100] x 100%(9)
Izinga lokuvuza komoya elingamamitha ayi-100 lomgudu wokungenisa umoya womhubhe linikezwa umkhiqizi wamapayipi encazelweni yepharamitha yomkhiqizo wefekthri.Ngokuvamile kudingeka ukuthi izinga lokuvuza komoya elingamamitha ayi-100 lomgudu wokungenisa umoya oguquguqukayo kufanele lihlangabezane nezidingo zethebula elilandelayo (bona Ithebula 2).
Ithebula 2 Izinga lokuvuza komoya elingamamitha ayi-100 lomgudu wokungenisa umoya oguquguqukayo
| Ibanga lokungenisa umoya(m) | <200 | 200-500 | 500-1000 | 1000-2000 | >2000 |
| Le100(%) | <15 | <10 | <3 | <2 | <1.5 |
b.Izinga levolumu yomoya elisebenzayoEfwomgudu wokungenisa umoya womhubhe: okungukuthi, iphesenti lomthamo womoya womhubhe wobuso obudonsayo ukuya kuvolumu yomoya osebenzayo wefeni.
Ef=(Q/Qf) x 100%
=[(Qf-QL)/Qf] x 100%
=(1-Le) x 100%(10)
Kusuka esilinganisweni (9):Qf=100Q/(100-L•Le100) (11)
Faka isibalo (11) endaweni yezibalo (10) ukuze uthole:Ef=[(100-L•Le100)] x100%
=(1-L•Le100/100) x100% (12)
c.Ukuvuza komoya i-coefficient yendawo yokufaka umoya yomhubheΦ: Okusho ukuthi, okuhambisana nezinga lomthamo womoya osebenzayo womgudu wokungenisa umoya womhubhe.
Φ=Qf/Q=1/Ef=1/(1-Le)=100/(100-L•Le100)
3.1.3 Ububanzi bomhubhe wokungenisa umoya womhubhe
Ukukhethwa kobubanzi bomgudu wokungenisa umoya womhubhe kuncike ezintweni ezifana nevolumu yokuphakelwa komoya, ibanga lokuphakelwa komoya kanye nobukhulu besigaba somhubhe.Kuzinhlelo zokusebenza ezingokoqobo, ububanzi obujwayelekile ngokuvamile bukhethwa ngokuya ngesimo esifanayo nobubanzi be-outlet yabalandeli.Ngokuthuthuka okuqhubekayo kobuchwepheshe bokwakha umhubhe, imihubhe eyengeziwe futhi emide imbiwa ngezigaba ezigcwele.Ukusetshenziswa kwamapayipi amakhulu obubanzi bokungena komoya wokwakha kungenza kube lula kakhulu inqubo yokwakha umhubhe, ovumela ukugqugquzelwa nokusetshenziswa kokumbiwa kwesigaba esigcwele, kusiza ukwakheka kwemigodi ngesikhathi esisodwa, konga inqwaba yabasebenzi nezinto zokwakha, futhi kwenza kube lula kakhulu. ukuphathwa kwe-ventilation, okuyisixazululo semigudu emide.Imigudu yokuphefumula yomhubhe enobubanzi obukhulu iyindlela eyinhloko yokuxazulula umoya omude wokwakhiwa komhubhe.
3.2 Nquma imingcele yokusebenza yefeni edingekayo
3.2.1 Thola umthamo womoya osebenzayo wefeniQf
Qf=Φ•Q=[100/(100-L•Le100)]•Q (14)
3.2.2 Thola umfutho womoya osebenzayo wefenihf
hf=R•Qa2=R•Qf•Q (15)
3.3 Ukukhetha izinto zokusebenza
Ukukhethwa kwezinto zokungenisa umoya kufanele kuqala kucabangele imodi yokukhipha umoya futhi kuhlangabezane nezidingo zemodi yokukhipha umoya esetshenziswayo.Ngasikhathi sinye, lapho kukhethwa imishini, kuyadingeka futhi ukuthi kubhekwe ukuthi umthamo womoya odingekayo emhubheni uhambisana nemingcele yokusebenza yemigudu engenhla ebalwe ngenhla yomhubhe wokungenisa umoya kanye namafeni, ukuze kuqinisekiswe ukuthi imishini yokukhipha umoya nemishini ifinyelela izinga eliphezulu. ukusebenza kahle kanye nokunciphisa ukuchithwa kwamandla.
3.3.1 Ukukhetha abalandeli
a.Ekukhethweni kwabalandeli, abalandeli be-axial flow basetshenziswa kabanzi ngenxa yobukhulu babo obuncane, isisindo esincane, umsindo ophansi, ukufakwa okulula nokusebenza kahle okuphezulu.
b.Umthamo womoya osebenzayo wefeni kufanele uhlangabezane nezidingo zeQf.
c.Umfutho womoya osebenzayo wefeni kufanele uhlangabezane nezidingo zehf, kodwa akufanele ibe mkhulu kunokucindezela okuvumelekile okusebenzayo kwefeni (amapharamitha wefekthri wefeni).
3.3.2 Ukukhetha umgudu wokungenisa umoya womhubhe
a.Imigudu esetshenziselwa ukumba umoya womhubhe ihlukaniswe yaba imigudu yokukhipha umoya engenazimbotshana, imigudu evumayo yokukhipha umoya enamathambo aqinile kanye nemigudu yokuphefumula eqinile.I-frameless flexible ventilation duct inesisindo esincane, kulula ukuyigcina, ukuyiphatha, ukuxhuma nokumisa okwesikhashana, futhi inezindleko eziphansi, kodwa ifaneleka kuphela ukungena komoya ngokucindezela;Emshinini wokudonsa umoya, kungasetshenziswa kuphela imigudu yokufaka umoya eguquguqukayo futhi eqinile enamathambo aqinile angasetshenziswa.Ngenxa yezindleko zayo eziphakeme, isisindo esikhulu, akulula ukugcina, ukuthutha nokufakwa, ukusetshenziswa kokucindezela kudlule kuncane.
b.Ukukhethwa komgudu wokungenisa umoya kubheka ukuthi ububanzi bomzila wokungenisa umoya buhambisana nobubanzi bokuphuma kwefeni.
c.Uma ezinye izimo zingahluka kakhulu, kulula ukukhetha ifeni enokumelana komoya ophansi kanye nezinga eliphansi lokuvuza komoya elingamamitha ayi-100.
Kuzoqhutshwa......
Isikhathi sokuthumela: Apr-19-2022
