Owokuqala uwukuphakela amanzi, okungukuthi, ukufaka amanzi kubhayela.Ngokuvamile, ifakwe ipompo ekhethekile ukwenza inqubo yokuphambukisa amanzi ibe lula futhi isheshe.Lapho amanzi ethulwa ku-boiler, ngoba abamba ukushisa okukhishwe ukushiswa kwamafutha, umusi ngokucindezela okuthile, izinga lokushisa nokuhlanzeka kubonakala.Ngokuvamile, ukwengeza amanzi ku-boiler kumele kudlule izinyathelo ezintathu zokushisa, okungukuthi: ukunikezwa kwamanzi kuyashiswa ukuze kube amanzi agcwele;amanzi agcwele ayashiswa futhi ahwamuke ukuze abe isitimu esigcwele;isixhumanisi.
Ngokuvamile, amanzi kubhayela wesigubhu kufanele kuqala ashiswe ku-economizer aze afike ezingeni lokushisa elithile, bese ethunyelwa esigubhini ukuze axubane namanzi abhayela, bese efaka i-circulation circuit ngokusebenzisa i-downcomer, futhi amanzi ayafudumala. esikhuphukeni Ingxube yamanzi e-steam ikhiqizwa lapho ifinyelela izinga lokushisa lokugcwala futhi ingxenye yalo iyahwamuka;khona-ke, kuye ngomehluko wokuminyana phakathi kwesikhuphukeli nesiphansi noma iphampu yokujikeleza ephoqelelwe, ingxube yamanzi esitimu ikhuphukela esigubhu.
Isigubhu siwumkhumbi we-cylindrical pressure othola amanzi esishisweni samalahle, ohlinzeka ngamanzi ku-circulation loop futhi ulethe isitimu esigcwele ku-heater, ngakho futhi siyisixhumanisi phakathi kwezinqubo ezintathu zokushisisa kwamanzi, ukuhwamuka kanye nokushisa okuphezulu.Ngemva kokuba ingxube yamanzi esitimu isihlukanisiwe esigubhu, amanzi angena emgudwini wokujikeleza nge-downcomer, kuyilapho isitimu esigcwele singena esimisweni sokushisa kakhulu futhi sishiswa sibe isitimu ngezinga elithile lokushisa okukhulu.