Izinzuzo zama-Microchannel Heat Exchangers (MCHEs) Uma kuqhathaniswa Nezishintshi Zokushisa Zendabuko (I-Copper Tube Aluminium Fin Heat Exchangers)
I-Superior Heat Transfer Ngempumelelo
Ama-MCHE afaka amashaneli amakhulu kakhulu-okugeleza kwangaphakathi amancane (ngokuvamile angu-0.1–2 mm ububanzi) kanye nendawo ephezulu{3}}kuya{4}}kwesilinganiso sevolumu. Lo mklamo ukhulisa ukuxhumana phakathi kwendawo yokudlulisa ukushisa (njengeziqandisi ezifana ne-R134a noma i-R404A) nendawo yokushintsha ukushisa, okuvumela ukusebenza kahle kokudluliselwa kokushisa kukhuphuke ngo-42% noma ngaphezulu uma kuqhathaniswa namamodeli e-copper{9}}endabuko. Ukunyakaziswa okuthuthukisiwe koketshezi kuma-microchannel kunciphisa kakhulu ukumelana nokushisa, okwenza ama-MCHE alungele izimo zokonga{11}njengamafriji entengiso namakhabethe esibonisi.
Usayizi Ohlangene kanye Nesisindo Esilula
Akhiwe ngazo zonke-izinto ze-aluminium kanye ne-fin edidiyelwe{1}}isakhiwo seshubhu eliyisicaba (nge-welding engenamthungo), ama-MCHE aminyene kakhulu futhi alula. Ngokwesilinganiso, athatha isikhala esingaphansi ngo-32–51% futhi anesisindo esingaphansi ngo-42–61% kunezishintshi zokushisa ezisekelwe kukhopha{7}ezisekelwe kumthamo wokushisa ofanayo. Le nzuzo ibalulekile esikhaleni{9}}ezinhlelo zokusebenza ezibambekile, ezifana ne-automotive air conditioning, compact refrigeration units, noma amasistimu e-HVAC asendlini.
Izinto Eziphansi Nezindleko Zokusebenza
I-Aluminium, into eyinhloko yama-MCHEs, ibiza kakhulu-isebenza kahle kunethusi (ingxenye ebalulekile yabashintshi bendabuko), yehlisa izindleko zempahla eluhlaza ngo-20–30%. Ukwengeza, ama-MCHE adinga ukushajwa kwesiqandisi okuncane kakhulu (kufika ku-50–70% ngaphansi) ngenxa yevolumu yawo yangaphakathi encane, ehlisa{6}izindleko zokusebenza zesikhathi eside futhi ahambisane nemithetho yemvelo yomhlaba wonke (isb, F{9}}imithetho yegesi) ekhawulela ukusetshenziswa ngokweqile kwesiqandisi.
Ukwethenjwa Kwesakhiwo Okuthuthukisiwe
Izinqubo zokukhiqiza ezithuthukisiwe (isb, i-vacuum brazing yazo zonke-izingxenye ze-aluminium) zidala ukuxhumana okungenamthungo phakathi kwama-fin namashubhu ayisicaba kuma-MCHEs, kuqedwe izikhala ezibangela ukumelana nokushisa noma ukuvuza kwesiqandisi kumashubhu omdabu{3}}ama-fin exchangers. Lesi sakhiwo esingenamthungo siphinde sithuthukise ukumelana nokudlidliza nokuhamba ngebhayisikili okushisayo, kunwebe impilo yesevisi ezindaweni eziguquguqukayo (njengamaloli efriji eselula).
Ububi be-Microchannel Heat Exchangers (MCHEs) Uma kuqhathaniswa Nezishintshi Zokushisa Zendabuko
I-Inferior Corrosion Resistance
I-aluminiyamu, nakuba ingasindi, inokumelana nokugqwala okuphansi kunethusi-ikakhulukazi ezindaweni ezinokhahlo (isb, izilungiselelo zasolwandle,{3}}izindawo ezinomswakama ophezulu, noma izinhlelo zokusebenza ezinoketshezi olune-asidi/alkaline). Ngaphandle kwama-anti{5}}engeziwe ama-anti-corrosion coatings (isb., ama-phenolic resin coatings), ama-MCHE angase ahlupheke ngenxa ye-aluminium oxidation noma i-pitting, edinga ukunakekelwa okuphindaphindiwe noma ukushintshwa kwezimo ezibolayo.
Ubunzima Bokulungisa Okuphezulu kanye Nezindleko
Idizayini edidiyelwe, ehlangene yama-MCHE yenza ukulungisa kube inselele. Ngokungafani namashubhu avamile-ama-fin exchanger (lapho amashubhu alimele noma amaphiko angashintshwa ngamanye), ukukhubazeka okukodwa kuma-microchannels we-MCHEs kuvame ukudinga ukushintshwa kweyunithi yonke. Lokhu kwandisa izindleko zokunakekela kanye nesikhathi sokuphumula, ikakhulukazi{3}}ezinhlelweni zokusebenza zezimboni ezinkulu.
Utshalomali Lokuqala Oluphakeme Lokukhiqiza
Ama-MCHE adinga ubuchwepheshe bokukhiqiza obunembayo (isb, i-micro-extrusion yamashubhu ayisicaba,{3}}i-vacuum brazing ephezulu) nezisetshenziswa ezikhethekile. Nakuba izindleko zezinto ezibonakalayo ziphansi, ukutshalwa kwezimali kwangaphambili emigqeni yokukhiqiza kuphakeme ngokuphindwe izikhathi ezingu-2-3 kunaleyo yezishintshisi zokushisa ezivamile. Lokhu kwenza ama-MCHE angongi kangako-ekukhiqizweni kwenqwaba noma{9}}amaphrojekthi ebhajethi aphansi.
Ukusebenza Okukhawulelwe{0}Kwezinga Lokushisa Okulinganiselwe
Iphuzu lokuncibilika le-Aluminium (cishe amadigri angu-660) kanye nokuzinza kokushisa kuphansi kunethusi (iphuzu elincibilikayo ~1085 degree). Ezimeni-zezinga lokushisa eliphezulu (isb., ama-boilers wezimboni,{6}}ukuthola ukushisa kwemfucumfucu yezinga lokushisa eliphezulu), ama-MCHE angase ahlangabezane nokuncipha kobuqotho besakhiwo noma ukusebenza kahle kwe-thermal, kuyilapho ama-exchanger asekelwe ekhopha{7}}asekelwe ngokwesiko agcina ukusebenza okungcono ngaphansi kwezimo ezinjalo.
Ukuzwela Kokukhetha Okubalulekile
Uma usayizi wesiteshi ungu-< 0.5 mm, umehluko ekusebenzeni kokudlulisa ukushisa phakathi kwezinto ezifana nethusi nensimbi engagqwali ungafinyelela ku-20%. Imikhawulo yedizayini eyinhloko kufanele icatshangelwe ngokugcwele ngokuhambisana nezidingo zokumelana nokugqwala.
Ukuzuzwa Komumo Wesiteshi
Izakhiwo zamashaneli eziyinkimbinkimbi (isb., inyoka/i-serrated) zikhuphula ukusebenza kahle kokudluliswa kokushisa izikhathi ezingu-1.2 kuya kwezingu-1.4 uma kuqhathaniswa namashaneli aqondile, kodwa kuyadingeka ukulinganisela ukuhweba{4}}kwenyuke ngo-15% -25% ekwehleni kwengcindezi.
Amashadi ashisayo: i-mche micro-i-evaporator yesiteshi, i-China mche micro-abakhiqizi be-evaporator yesiteshi, abahlinzeki, imboni
