Ukufakela: Isifakeli silingana nokusebenza kakubi kokuhamba komoya kwimibhobho ebhetyebhetye. Ufakelo olukhulu lulingana nokusebenza okukhulu kokuhamba komoya ukusuka kwimibhobho eguquguqukayo. Uthatha isigqibo sokuba imveliso yakho iya kusebenza njani. (ngenkxaso kaDavid Richardson)
Abaninzi kwishishini lethu bakholelwa ukuba imathiriyeli yebhobho esetyenziswa kufakelo imisela isakhono senkqubo ye-HVAC yokuhambisa umoya. Ngenxa yale ngqondo, i-flexible ducting ihlala ifumana i-rap embi. Ingxaki asilohlobo lwempahla. Kunoko, sifaka imveliso.
Xa uvavanya iinkqubo ezingasebenziyo ezisebenzisa i-flexible ducting, uya kudibana neengxaki zofakelo eziphindaphindiweyo ezinciphisa ukuhamba komoya kunye nokunciphisa induduzo kunye nokusebenza kakuhle. Nangona kunjalo, ngokunikela ingqalelo kwiinkcukacha, unokulungisa ngokulula kwaye uthintele iimpazamo eziqhelekileyo. Makhe sijonge iingcebiso ezintlanu zokukunceda ufake ngcono i-flexible ducting ukuze ugcine inkqubo yakho isebenza kakuhle.
Ukuphucula umgangatho wofakelo, gwema ukujika okubukhali kombhobho ogobileyo kuzo zonke iindleko. Inkqubo isebenza kakuhle xa ubeka imibhobho ngokuthe tye kangangoko kunokwenzeka. Ngemiqobo emininzi kumakhaya anamhlanje, oku akusoloko kulukhetho.
Xa umbhobho kufuneka ujike, zama ukuwagcina ubuncinci. Ukujika okude, okubanzi kusebenza kakuhle kwaye kuvumela umoya ukuba udlule ngokulula. I-Sharp 90 ° igoba ityhubhu eguquguqukayo ngaphakathi kwaye inciphisa ukuhamba komoya okunikezelwayo. Njengoko ukujika okubukhali kuthintela ukuhamba komoya, uxinzelelo lwe-static kwinkqubo luyanda.
Ezinye iindawo eziqhelekileyo apho ezi zithintelo zenzeka khona kuxa imibhobho idityaniswe ngokungafanelekanga nokusuka kunye neebhutsi. Amalungu ahlala ejika ngokuqinileyo okuphazamisa ukuhamba komoya. Lungisa oku ngokunika umbhobho inkxaso eyaneleyo yokutshintsha indlela okanye ngokusebenzisa i-elbows yentsimbi.
Ukuqulunqwa kolwakhiwo yenye ingxaki eqhelekileyo oya kuyifumana kwiiattics ezininzi. Ukulungisa oku, unokufuna ukubuyisela umbhobho okanye ufumane enye indawo ukuphepha ukujika okubukhali.
Omnye unobangela oqhelekileyo wokungenwa komoya kakubi kunye nezikhalazo zokuthuthuzela kukudodobala ngenxa yokungonelanga kwenkxaso yemibhobho. Abafakeli abaninzi baxhoma imibhobho kuphela yonke i-5-6 yeenyawo, ezinokubangela ukuchithwa okukhulu kumbhobho. Le meko iba mandundu kubomi bombhobho kwaye iyaqhubeka nokunciphisa ukuhamba komoya. Ngokufanelekileyo, umbhobho oguquguqukayo akufuneki ugxumeke ngaphezu kwe-intshi e-1 kubude beenyawo ezi-4.
Ukugoba kunye nemibhobho egobileyo ifuna inkxaso eyongezelelweyo. Xa usebenzisa izinto ezixhonywe emxinwa ezifana neteyiphu yokuncamathelisa okanye ucingo, umjelo unokuvaleka kweli nqanaba. Kwiimeko ezinzima, iingcingo zinokunqunyulwa zibe yimibhobho, ebangela ukuba umoya uvuze kwiindawo ezingenakunqandwa zesakhiwo.
Xa oku kungafezeki kukho, umoya uvaliwe kwaye ucothiswe. Ukuphelisa ezi ngxaki, fakela izixhaso ngamaxesha aqhelekileyo, njengazo zonke iinyawo ezi-3 endaweni yeenyawo ezi-5, ezi-6, okanye ezisi-7.
Njengoko ufaka iinkxaso ezininzi, khetha izinto zakho zokubopha ngobulumko ukuthintela ukuzibamba ngokungeyonjongo. Sebenzisa ubuncinane ii-intshi ezi-3 ezibambayo okanye iintsimbi zentsimbi ukuxhasa umbhobho. Iisali zemibhobho ziyimveliso esemgangathweni engasetyenziselwa ukuxhasa ngokukhuselekileyo imibhobho eguquguqukayo.
Esinye isiphene esiqhelekileyo esibangela ukuhamba komoya okungahambi kakuhle kwenzeka xa undoqo oguquguqukayo wombhobho uye wankqonkqozwa xa uncanyathiselwe kwi-boot okanye xa ususiwe. Oku kunokwenzeka ukuba awuwoluli undoqo kwaye unqumle ubude. Ukuba awukwenzi oku, ingxaki yokuncamathela iya kwenziwa mandundu ngokucinezela undoqo ngokukhawuleza nje ukuba utsale i-insulation phezu kwe-boot okanye ikhola.
Xa silungisa i-ductwork, siqhele ukususa ukuya kuthi ga kwi-3 yeenyawo ze-core eyongezelelweyo enokuthi ziphoswe kuhlolo olubonakalayo. Ngenxa yoko, silinganise ukunyuka komoya okuma-30 ukuya kwi-40 cfm xa kuthelekiswa ne-6″ duct.
Ngoko qiniseka ukutsala umbhobho ngokungqongqo kangangoko. Emva kokudibanisa umbhobho kwi-boot okanye ukuyisusa, qinisa kwakhona ukusuka kwelinye icala ukuze ususe i-core excess. Qeda uqhagamshelo ngokuqhagamshela kwelinye icala kwaye ugqibezele ukufakela.
Amagumbi akude eplenum ziibhokisi ezixande okanye oonxantathu abenziwe ngemibhobho yofakelo olusezantsi kwe-attic. Badibanisa umbhobho omkhulu oguquguqukayo kwigumbi, elondla imibhobho emininzi emincinci ephuma kwigumbi. Lo mbono ujongeka uthembisa, kodwa banemiba ekufuneka uyazi.
Ezi zixhobo zinoxinzelelo oluphezulu kunye nokungabikho kwendlela yokuhamba komoya njengoko i-airflow izama ukushiya isilinganisi. Umoya ulahlekile kwiplenum. Oku kubangelwa ikakhulu ngenxa yokulahlekelwa ukukhawuleza kwi-fitting xa umoya onikezelwa kumbhobho ukuya kwi-fitting uyanda kwindawo enkulu. Nasiphi na isantya somoya siya kuhla apho.
Ke ingcebiso yam kukunqanda ezi zixhobo. Endaweni yoko, qwalasela inkqubo yokunyusa eyandisiweyo, umtsi omde, okanye inkwenkwezi. Iindleko zokufakela ezi zilinganisi ziya kuba phezulu kancinci kunokufaka i-plenum ekude, kodwa ukuphuculwa kokuhamba komoya kuya kubonakala ngokukhawuleza.
Ukuba ulinganisa umbhobho ngokwemigaqo yakudala yobhontsi, ungenza into enye njengangaphambili kwaye inkqubo yakho yokubhobhoza isaqhuba kakubi. Xa usebenzisa iindlela ezifanayo ezisebenza kwimibhobho yentsimbi ukuya kubungakanani bemibhobho ebhetyebhetye, oko kukhokelela kumoya ophantsi kunye noxinzelelo oluphezulu olumileyo.
Ezi zixhobo zombhobho zinezakhiwo ezimbini ezahlukeneyo zangaphakathi. Icwecwe lesinyithi linomphezulu ogudileyo, ngelixa isinyithi esithambileyo sinondoqo ojikelezayo ongalinganiyo. Lo mahluko udla ngokukhokelela kumazinga ahlukeneyo okuhamba komoya phakathi kwezi mveliso zimbini.
Okuphela komntu endimaziyo onokwenza i-flexible ducting njengeshiti lentsimbi nguNeil Comparetto weComfort Squad eVirginia. Usebenzisa iindlela zokufakela ezintsha ezivumela inkampani yakhe ukuba ifezekise ukusebenza kombhobho ofanayo kwizinto zombini.
Ukuba awukwazi ukuvelisa kwakhona isifakeli sikaNeal, inkqubo yakho iya kusebenza ngcono ukuba uyila umbhobho omkhulu oguqukayo. Abantu abaninzi bathanda ukusebenzisa i-friction factor ye-0.10 kwi-calculator yabo yombhobho kwaye bacinge ukuba i-intshi ezi-6 zombhobho ziza kunika ukuhamba kwe-100 cfm. Ukuba oku kukulindela kwakho, ngoko umphumo uya kukuphoxa.
Nangona kunjalo, ukuba kufuneka usebenzise i-Metal Pipe Calculator kunye namaxabiso angagqibekanga, khetha ubungakanani bombhobho kunye ne-coefficient ye-friction ye-0.05 kwaye ulandele imiyalelo yokufakela apha ngasentla. Oku kukunika ithuba elingcono lokuphumelela kunye nenkqubo esondeleyo kwinqanaba.
Ungaxoxa imini yonke malunga neendlela zokuyila umbhobho, kodwa ude uthathe imilinganiselo kwaye uqiniseke ukuba ufakelo luhambisa umoya owufunayo, yingqikelelo yonke. Ukuba uyazibuza ukuba uNeil wayesazi njani ukuba angafumana iimpawu zetsimbi zetyhubhu ejiyileyo, kungenxa yokuba wayilinganisa.
Ixabiso lokuhamba komoya elilinganisiweyo ukusuka kwidome yokulinganisa kulapho irabha idibana khona nendlela yalo naluphi na ufakelo lombhobho obhetyebhetye. Usebenzisa ezi ngcebiso zingasentla, ungabonisa isifakeli sakho ukuhamba komoya okwandisiweyo okuzisiweyo. Bancede babone indlela ebaluleke ngayo ingqalelo yabo kwiinkcukacha.
Yabelana ngezi ngcebiso kunye nesifakeli sakho kwaye ufumane isibindi sokufakela ngokufanelekileyo inkqubo yakho yokufaka imibhobho. Nika abasebenzi bakho ithuba lokufumana umsebenzi ngokufanelekileyo okokuqala. Abathengi bakho baya kuyixabisa kwaye kuya kuba lula ukuba ubuyele.
UDavid Richardson nguMphuhlisi weKharityhulam kunye noMyaleli weShishini weHVAC kwiNational Comfort Institute, Inc. (NCI). I-NCI igxile kuqeqesho lokuphucula, ukulinganisa kunye nokuqinisekisa ukusebenza kwe-HVAC kunye nezakhiwo.
If you are an HVAC contractor or technician and would like to learn more about high precision pressure measurement, please contact Richardson at davidr@ncihvac.com. The NCI website, www.nationalcomfortinstitute.com, offers many free technical articles and downloads to help you grow professionally and strengthen your company.
Umxholo oXhasiweyo licandelo elikhethekileyo elihlawulweyo apho iinkampani zoshishino zibonelela ngeziqulatho ezikumgangatho ophezulu, ezingakhethi cala, ezingasorhwebo kwizihloko ezinomdla kubaphulaphuli beendaba be-ACHR. Yonke imixholo exhasiweyo inikezelwa ziinkampani zentengiso. Unomdla wokuthatha inxaxheba kwicandelo lethu lomxholo oxhaswe ngemali? Qhagamshelana nommeli wendawo yakho.
KwiMfuno Kule webinar, siya kufunda malunga nohlaziyo lwamva nje lwe-R-290 yefriji yendalo kunye nendlela eya kuba nefuthe ngayo kwishishini le-HVACR.
Ixesha lokuposa: Apr-19-2023