Ivacuum egqibeleleyo yokukhenkcisa{0}}imveliso yokomisa inamanqanaba amabini angundoqo:{1}}ukukhenkceza kwangaphambili kunye nokomisa i-sublimation. Inkqubo ye sublimation isusa iikristale zomkhenkce ngaphakathi kwimathiriyeli, ngelixa {3}ukuqala komkhenkce kumisela uhlobo losasazo kunye nobukhulu beekristale zomkhenkce phambi kokoma. Nokuba isisomisi somkhenkce sisebenza ngokuzinzileyo kwisigaba se-sublimation, iingxaki zomgangatho obangelwa kukukhenkceza okungafanelekanga kwangaphambili{5} kuya kuhlala kwiimveliso ezigqityiweyo ngokusisigxina.
Ukuba iqondo lomkhenkce langaphambili-lingaphezulu kunendawo ye-eutectic okanye ixesha lokubamba i-thermal alanele, amanzi asimahla ngaphakathi kwemathiriyeli ekrwada akanakuguqulwa ngokupheleleyo abe ngumkhenkce oqinileyo. Phantsi kweemeko eziphezulu zokufunxa, amanzi angamanzi angakhenkcezikiyo ayanyibilika aze afuduke, nto leyo ekhokelela ekucuthekeni kwezinto, ukuqina komphezulu kunye nokuwohloka. -iziqhamo zeswekile eziphezulu ezifana namaqunube, iimango ziqhelene nokupholisa okukhulu. Umphezulu ukhangeleka umkhenkce, ngelixa ngaphakathi kusenamalungu angamalwelo, ekunzima ukuwafumana ngokuqwalasela okulula.
Isantya sokukhenkca sikwazisa umahluko ocacileyo kwiimpawu zemveliso. Ultra-umkhenkce okhawulezayo uvelisa inani elikhulu leekristale zomkhenkce ezincinci. Emva kwe-sublimation, iziteshi ze-pore ngaphakathi kwezixhobo zincinci, ezikhokelela kwisantya esicothayo sokubuyisela amanzi emzimbeni kwiimveliso ezigqityiweyo. Umkhenkce ocothayo ngokuphakathi unokwenza iikristale ezinkulu zomkhenkce. Emva kwe-ice sublimates, ii-pores ezibanzi zihlala, ziphucula ngokufanelekileyo umthamo wokubuyisela amanzi. Nangona kunjalo, ukukhenkceza okucothayo ngokugqithisileyo kuya kutshabalalisa iindonga zeseli zemathiriyeli ekrwada, kubangele ukuphuma kwejusi kunye nokulahleka kwezithako ezisebenzayo.
Iimathiriyeli ekrwada ezahlukeneyo ezibandakanya inyama, imifuno enamagqabi, amaqunube kunye nezityalo zengcambu zineendawo ezahlukeneyo ze-eutectic kunye neempawu zethishu. Akukho universal pre{1}}iparamitha yomkhenkce elungele zonke imathiriyeli. Iifektri zobuchwephesha kufuneka zenze uvavanyo lwenkqubo encinci-ngokweendidi zazo zemveliso phambi kokuveliswa kobuninzi, ziphonononge ubushushu obuzinzileyo kunye nokubamba iiparamitha, kwaye ziqinise iigophe ezisele zikhulile{4}}zomkhenkce kwinkqubo yolawulo.
Ubuchwephesha obulungiselelwe ngaphambili{0}} bokukhenkceza bunokunciphisa ngokusebenzayo iziphene eziqhelekileyo eziquka ukwenza mdaka, ukuqhekeka, ukuwa kunye nokubuyisela amanzi emanzini. Iphucula isivuno semveliso egqityiweyo, izinzisa ibhetshi{2}}uku{3}}ukungaguquguquki kwebhetshi, yomeleza ukukhuphisana kwemveliso kwiimarike zaphesheya kweelwandle, kwaye idale indawo yengeniso enkulu yokukhenkceza{4}}amashishini okutya okomileyo.
