Isishintshi sokushisa sifinyelela kanjani ukudluliswa kokushisa kwe-convection?
Izishintshisi zokushisa ze-plate ikakhulukazi zisebenzisa i-convection phakathi kwemidiya emibili ebandayo neshisayo ukuze zithole ukushintshana kokushisa, futhi ukushintshisana okuwuketshezi-kungenye yezindlela ezisetshenziswa kakhulu zokushintshisana kokushisa.
Ukudlulisa ukushisa kwe-convection kungenye yezindlela ezivame kakhulu neziyisisekelo zokudlulisa ukushisa. Phakathi nenqubo yokudlulisa ukushisa, i-liquid medium ihlale ithintana nodonga lwesishintshi sokushisa. Ngakho-ke, ukudluliswa kokushisa kufinyelelwa ngokugeleza okuqhubekayo okuphambene noketshezi. Ukushisa bese benana ngokusebenzisa umehluko lokushisa phakathiisishintshi sokushisaudonga kanye noketshezi. Yilokhu esikhuluma ngakho namuhla: ukudluliswa kokushisa kwe-convection.
Izishintshisi zokushisa ze-Plate zifinyelela ukushintshaniswa kokushisa kwe-convection okusebenzayo phakathi kwamanzi amabili anamazinga okushisa ahlukene (ngokuvamile uketshezi olubandayo noketshezi olushisayo) esimweni esingasodwa ngomklamo okhethekile wesakhiwo sepuleti, ukuqhutshwa koketshezi okuphoqelekile kanye nendlela yokudlulisa ukushisa ephumelelayo.Isimiso saso esiyinhloko singahlukaniswa sibe izixhumanisi ezintathu ezibalulekile: ukwakheka kwesakhiwo → ukugeleza koketshezi → ukudluliswa kokushisa. Inqubo ethile yokuqalisa imi kanje:
Amandla okudlulisa ukushisa kwesishintshi sokushisa kwepuleti ancike ngokuyinhloko ekwakhiweni okukhethekile kwamapuleti okushintshanisa ukushisa. Lezi zakhiwo zinquma ngokuqondile iphethini yokugeleza nendawo yokudlulisa ukushisa yoketshezi, futhi iyisisekelo sokudluliswa kokushisa okuguquguqukayo:
Ingqikithi yokudluliswa kokushisa okuguquguqukayo yinhlanganisela "yokugeleza okukhulu-kokugeleza kwe-fluid + i-molecular micro{2}}yokudlulisa ukushisa". Izishintshisi zokushisa ze-plate zisebenzisa amandla angaphandle (amaphampu, amafeni) ukuphoqa ukugeleza koketshezi, ukushayela inqubo yokudlulisa ukushisa ngezinyathelo ezimbili:
Iqhutshwa amaphampu angaphandle, uketshezi olubandayo nolushisayo lungena eziteshini ezizimele zokugeleza:
Uketshezi olubandayo lungena kwelinye iqoqo leziteshi zokugeleza lisuka "ekungeneni koketshezi olubandayo," nalo lugeleza ngephethini enyakazayo, lushintshanisa ukushisa namapuleti.
Ngenxa yezikhala ezincane kakhulu phakathi kwamashaneli okugeleza (imvamisa engu-2-5 mm), uketshezi " luyacindezelwa" phakathi nokugeleza, kuthuthukise ukugeleza okuneziyaluyalu futhi kuvimbele ukuma koketshezi lwasendaweni okungase kwehlise ukusebenza kahle kokudlulisa ukushisa.
I-Architectural design & planning cepteur sint occaecat cupidatat proident, taken possession of my soul all, njengalezi zikhathi ezimnandi zasekuseni zasentwasahlobo engizijabulela ngawo wonke...I-Architectural design & planning cepteur sint occaecat cupidatat proident, taken possession od my whole soul, njengalezi zinsuku ezimnandi zasentwasahlobo engizijabulela ngaso sonke isikhathi, elit, sed do eiusmod tempor incididunt labore et dolore magna aliqua. it enim ad minim veniam.
Umnyombo wokudluliswa kokushisa okuguquguqukayo "ukudlulisa ukushisa kusuka kuketshezi olushisayo kuya oketshezini olubandayo". Ipuleti lisebenza njengendlela yokuzihlukanisa kanye nokudlulisa ukushisa, idlala indima ebalulekile ekudluliseni ukushisa. Iqedwa ngezinyathelo ezintathu:
Okokuqala: Uketshezi olushisayo → Ipuleti (Ukudluliswa kokushisa kwe-Convection)
Uma uketshezi olushisayo lugeleza ngamandla,-ama-molecule ezinga lokushisa eliphezulu ashayisana ngamandla nengaphezulu lepuleti, adlulisele ukushisa epuletini “nge-convection” (ngalesi sikhathi, izinga lokushisa lohlangothi lwepuleti eliseduze kakhulu noketshezi olushisayo liyenyuka).
Okwesibili: ngaphakathi kwepuleti (i-heat conduction)
Amapuleti enziwe ngensimbi (anokuhamba okuphezulu kwe-thermal, njengensimbi engagqwali (cishe 16W/(m・K) ne-titanium alloy (cishe 17W/(m・K))). Ukushisa kudluliselwa ngokushesha kusuka-kuhlangothi oluphezulu lwezinga lokushisa (uhlangothi loketshezi olushisayo) ukuya endaweni ephansi{4}}yezinga lokushisa eliphakathi nendawo "ehlangothini olubandayo lwemolekyuli."
Isikhathi sesithathu: Ipuleti → Uketshezi olubandayo (ukudluliswa kokushisa kwe-convection):
Uhlangothi oluphansi-lwezinga lokushisa lepuleti luthinta uketshezi olubandayo, futhi ngokungqubuzana kwama-molecule oketshezi olubandayo ekugelezeni okuyaluzayo, ukushisa kudluliselwa oketshezini olubandayo futhi ngokusebenzisa "i-convection" (ngalesi sikhathi izinga lokushisa loketshezi olubandayo liyakhuphuka futhi izinga lokushisa loketshezi olushisayo liyehla).
Ngaphezu kwezimiso eziyinhloko, imininingwane elandelayo yokuklama yepuletiisishintshi sokushisafuthi inikeza iziqinisekiso zokudlulisa ukushisa okuguquguqukayo: Isakhiwo esikhiphekayo: sigcina inhlanzeko.
Ngokuvamile, ngenxa yokuthi imidiya emibili esetshenziswayo ihlukile, ukugeleza kwayo okugeleza ngaphakathi kwemishini nakho kuhlukile, okungaholela ekuhlukeni okuphawulekayo ekudlulisweni kokushisa kwe-convective.Ukudlulisa ukushisa kwe-Convective ngokuvamile kuhlukaniswe ngezimo ezimbili. Okokuqala ukudluliswa kokushisa kwe-convection yemvelo, okuwukudlulisa ukushisa okugelezayo okukhiqizwa amazinga okushisa ahlukene nokuminyana kwemidiya emibili ngodonga. Okwesibili ukudluliselwa kokushisa kwe-convection okuphoqelekile, okuwukugeleza kokushisa okugelezayo okukhiqizwa amandla aphoqelelwe angaphandle (njengamaphampu, abalandeli kanye nezinye izinto zokusebenza) .Endabeni yokuguqulwa okuphoqelekile, izinga lokugeleza kwe-liquid ngokwalo liyoba phezulu kunezinga lokugeleza esimweni semvelo, futhi ukusebenza kahle kokudluliselwa kokushisa kwe-convective kuzophinde kube phezulu. Isibonelo, i-coefficient yokudlulisa ukushisa komoya ekugelezeni kwemvelo ingu-5~25W/(m2.℃kuphela), kodwa uma ukugeleza okuphoqelekile kwenziwa, i-coefficient yokudlulisa ukushisa yomoya ikhuphuka ibe ngu-10~100W(m2. degree).
Kunezici eziningi ezithinta ukusebenza kahle kokudlulisa ukushisa kwendawo ephakathi, njengezakhiwo ezibonakalayo ze-fluid medium ngokwayo: ukuminyana, umthamo wokushisa othize, ukuguquguquka kwe-thermal, njll., kanye nomklamo wemishini yokushintsha ukushisa ngokwayo: usayizi wepuleti lokushintshanisa ukushisa, ukuma kwepuleti, njll., kanye nendlela yokugeleza kwendawo ephakathi emishinini, konke okuzothinta ukusebenza kahle kwangempela kokudluliswa kokushisa kwe-convective.