Ithuluzi lemoya eliphezulu lihlala libalulekile kumkhakha wokwakhiwa kwemizila ejulile, linikela ngempahla ephephuliwe yokumba ngogesi, ukwenza iziphuzo, kanye nezinhlelo zokuphuma kwamanzi eziyisisekelo ekwakhiweni kwamadishi we-diaphragm, izigubhu zokukhwabanisa, kanye nezinye izinhlelo zokuvikela eziphansi. Emkhakheni wezindonga zomhlaba nezokukhwabanisa, imishini yemoya ihlinzeka ngemoto yokusebenza kumathuluzi wokumba kanye nemishini yokufaka impahla, okuyenza ibaluleke kakhulu empumelelweni yephrojekthi lapho izinqubo ezincike kumfutho ziphumelela. Ekukwakhiweni kwezimbozo ze-diaphragm, imishini yemoya inikeza umoya ophumayo kumathuluzi wokumba angogesi, izinhlelo zokubuyisela ukuhamba, kanye nezinsiza zokumba eziphakamisayo ezisetshenziselwa ukuqhubekisela phambili ukumba nokuthola udoti ezindaweni ezinzulu. Ekufakweni kwezigubhu zokukhwabanisa, ikakhulukazi ezinhlelweni zokwenza iziphuzo ezinamandla nezokuxuba umhlaba, imishini yokucindezela ivumela umoya ophakeme ukuze kwenziwe kube lula umhlaba nokufaka izinto zokwakha ezishintshiwe ngokuqondile nangomdlandla wokuxuba. Ngaphezu kwalokho, ekwakhiweni kuka-secant kanye no-tangent, abashintshi bendiza bomoya nezinsiza zomthethosivivinywa zisebenzisa ukuhlinzekwa komoya okuqhubekayo ukuze kuqhube izinqubo zokubeka ama-pile ezilandelanayo. Imishini yemoya futhi isetshenziselwa ukuhluza amanzi ezitokisini zesikhashana, ukususa ithusi legesi, nokucindezela imishini ngesikhathi sokufakwa kwezingxenye zokuvikela. Umqondo wokusebenza usekelwe kumadayisi wokuthola umoya noma imishini yama-screw enza umoya wamazinga, iyawavumelanisa ukuze afike kumafutha adingekayo (ngokuvamile 6–25 bar kumisebenzi eminingi yesisekelo esijulile), futhi ilethwa ngokuqhubekayo ngezinethiwekhi zokwabelana kumathuluzi angogesi. Abaphakeli bemfutholuki kanye nezihlahla zokuhlukanisa amanzi zikhuthaza imishini futhi zigcine ukunemba kwezinqubo. Ezinhlakeni zokumba nezokuphumula, ukunemba kwefutha kubalulekile; ukuze kuhlangane nezokuphuma kwamanzi kanye nemisebenzi yamathuluzi, ukuhlinzekwa kwenani (okuhlanganiswa ngemikhono eyindilinga) kuwukugcina okujolile. Umshini kumele uhlinzeke ukuhamba okwanele ukuze uvimbele ukuvuleka kwamathuluzi futhi ugcine izinga lokumba noma lokwenza iziphuzo eliqokwa ngababoni bokwakha. Ukulandelela izimo zemishini kusho ukusethwa okuvela kumayunithi aphakathi nendawo (70–600 kW) aqiniswa kumathrekhi noma kumabha omithombo ukuze kusebenze ezindaweni ezikude, kuya kumishini yokuhlinzeka ngogesi ezindaweni zasemadolobheni. Ama-screw compressors ahamba phambili ngenxa yokusebenza okuhle, ukuhlinzekwa okuqhubekayo, nokusebenza kahle ngokwezimali uma kuqhathaniswa nemiklamo yokuphinda. Ukuze kusebenze okuphelele, izinhlelo eziningi zifaka ama-inline singlestage units ukuze zisebenze kumafutha aphakathi nendawo kanye nezindawo ezimbili ukuze zisebenze kumsebenzi wokuphumula ophakeme. Umthamo wetanki (ngokuvamile 500–3,000 amalitha) uyawugequgquzela ukufuduka okufutha ngesikhathi sokungena kumjikelezo ophakeme, unciphisa imfuno yokuphinda umoya. Izimo zokukhetha zifaka umoya odingekayo, isikhala sokuphuma (esilingana nezincazelo zemishini ezitholakele), ukutholakala kwezinsiza zamandla, ukufinyelela endaweni, izinhlelo zokuphuma kwezwi, kanye nokusebenza kahle kokusetshenziswa kukaphethiloli. Ochwepheshe bahlola ama-ratio wamandla-ukuphuma ukuze bathuthukise izindleko zokusebenza futhi baqinisekise ukuthi izimboni zifinyelela izidingo zokusebenza zeziphuzo ezihlanganyelwe noma eziphumayo. Izimo zemvelo—ukushisa, ukuphakama, umswakama—zithinta ukusebenza kahle futhi kufanele zithathwe zifakwe kuzincazelo zemishini ukuze kuqinisekiswe umkhiqizo ophumelelayo. Amastandadi alawula ukusebenza kwemishini yokucindezela ahlanganisa i-ISO 1217 (ukuhlola kokwamukela kanye nezilinganiso zomthamo), i-ISO 2789 (ukuhlukaniswa kwemishini yokucindezela), kanye nemigomo efanele yokusebenza kwezinsizakusebenza ukuze kuqinisekiswe ukuphepha. Abakhi bama-Euro bacela i-DIN 6271 ukuze bahlolisise ukusebenza kwe-screw compressor, ngenkathi izitshalo zomfutho zihlangabezana nezidingo ze-PED (Pressure Equipment Directive) 2014/68/EU.
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