1. Isiphi isimiso esiyisisekelo sokusebenza sesishintshi sokushisa?Incazelo Yemikhiqizo
Umgomo oyisisekelo wesishintshi sokushisa uwukudlulisa ukushisa kusuka-kuketshezi olunezinga lokushisa eliphezulu kuya oketshezini-lokushisa okuphansi{2}}ngokujwayelekile ngaphandle kokuthintana okuqondile phakathi kwakho{3}}ngokusebenzisa ukuqhutshwa kokushisa nokuhamba.
Uketshezi oluphakeme-lwezinga lokushisa lukhipha ukushisa, okudluliselwa ngodonga lokushintshanisa ukushisa.
Ukushisa kwenziwa ngodonga lwensimbi (noma i-heat exchange medium).
Uketshezi lwezinga lokushisa eliphansi-lumunca ukushisa, okuholela ekukhuphukeni noma ekwehleni kwezinga lokushisa.
Yonke le nqubo ihambisana nomthetho wesibili we-thermodynamics, lapho ukushisa kugeleza ngokuzenzekelayo kusuka kumazinga okushisa aphezulu kuya ezingeni lokushisa eliphansi.
II. Izishintshisi zokushisa zikudlulisa kanjani ukushisa?
Izishintshisi zokushisa zifinyelela ngokuyinhloko ukudluliswa kokushisa okuphumelelayo ngokusebenzisa izindlela ezimbili: ukuqhutshwa kanye ne-convection.
• Ukuqhuba: Ukushisa kudluliselwa ngodonga lwensimbi ukusuka-kuhlangothi lwezinga lokushisa eliphezulu ukuya ohlangothini{1}}lezinga lokushisa eliphansi.
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• I-Convection: Uketshezi olugeleza nhlangothi zombili zodonga ngokuqhubekayo luthwala ukushisa noma ukululetha.
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• Umthelela ohlanganisiwe: Ukuhlangana kwe- conduction kanye ne-convection kuthuthukisa ukusebenza kahle kokudlulisa ukushisa.
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Ukudluliswa kokushisa okushisayo kungase kwenzeke kwezinye izinto zokusebenza, nakuba kudlala indima encane kuzishintshisi zokushisa zezimboni.
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3. Yiziphi izinhlelo zokugeleza ezivamile kuma-heaters?
Ngokusekelwe ohlangothini lokugeleza koketshezi, kunamaphethini amathathu ayinhloko okugeleza kwezishintshi zokushisa:
Co-ukugeleza kwamanje (ukugeleza okuhambisanayo): Uketshezi olubili lugeleza luye ohlangothini olufanayo, futhi umehluko wezinga lokushisa uyehla kancane kancane.
Ikhawunta-yamanje yokugeleza (ikhawunta-): Uketshezi olubili lugeleza lubheke ezinhlangothini eziphambene, lunikeza ukusebenza kahle okuphezulu kakhulu kokudlulisa ukushisa.
-ukugeleza: Uketshezi olubili lugeleza ngokuqondana; lokhu kumisa kuhlangene futhi kusetshenziswe kabanzi.
Phakathi kwalokhu, ikhawunta{0}}ilungiselelo lamanje lisetshenziswa kakhulu ezinhlelweni zezimboni lapho kudingeka ukusebenza kahle okuphezulu.
4. Isakhiwo sangaphakathi sesishintshi sokushisa siyithinta kanjani inqubo yokudlulisa ukushisa?
Idizayini yesakhiwo inquma ngokuqondile indawo yokudlulisa ukushisa, ukusatshalaliswa kwesivinini sokugeleza, nokusebenza kahle.
Indawo yokudlulisa ukushisa enkudlwana ibangela umthamo omkhulu wokudlulisa ukushisa ngeyunithi ngayinye yesikhathi.
Isakhiwo sesiteshi esigelezayo sinomthelela ezingeni lokunyakaza koketshezi; isiyaluyalu esiphezulu siholela ekudluliseni ukushisa okusebenzayo.
I-thermal conductivity ephakeme yezinto zodonga kubangela ukumelana nokushisa okuphansi.
Ukulungiselela okujwayelekile kufaka igobolondo-kanye-nezinhlobo zeshubhu, ipuleti, ne-spiral, ngayinye enezici ezihlukile zokudlulisa ukushisa.
5. Imaphi amafomula ayisihluthulelo asebenza ngesikhathi sokusebenza kwesishintshi sokushisa?
Izinqubo zokudlulisa ukushisa ngokuvamile zingachazwa kusetshenziswa i-equation eyisisekelo yokudluliswa kokushisa.
Isibalo esiyisisekelo sokudlulisa ukushisa:
Q=U × A × ΔTlm
Kuphi:
Q: Izinga lokudlulisa ukushisa (W)
U: I-coefficient yokudlulisa ukushisa sekukonke (W/m²·K)
A: Indawo yokudlulisa ukushisa (m²)
ΔTlm: I-Logarithmic isho umehluko wezinga lokushisa
Amanothi ezibalo:
Ukwenyusa u-U noma u-A kungathuthukisa kakhulu umthamo wokudlulisa ukushisa.
Umehluko omkhulu wezinga lokushisa uphumela kumandla okushayela anamandla okudlulisa ukushisa.
6. Yiziphi izici eziyinhloko ezithinta ukusebenza kahle kokushintshanisa ukushisa?
Ukusebenza kahle kokudlulisa ukushisa kuthonywa ngokuhlanganyela izici ezihlukahlukene zobunjiniyela.
Izakhiwo ze-Fluid: Umthamo wokushisa othize, ukuqhutshwa kwe-thermal, i-viscosity, njll.
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Isivinini sokugeleza: Isivinini sokugeleza esiphezulu ngokuvamile sithuthukisa ukudluliswa kokushisa kodwa futhi andisa ukumelana nokugeleza.
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I-Fouling factor: I-Fouling inyusa ukumelana nokushisa futhi inciphisa ukusebenza kahle.
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Indawo yokudlulisa ukushisa: Indawo enganele ikhawulela umthamo wokudlulisa ukushisa.
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Uma ufuna ukwazi okwengeziwe ngamayunithi esishintshisi sokushisa noma unentshisekelo yokuthenga, sicela uthumele i-imeyili ku-9988xiaoshuai@gmail.com, sizokuphendula ngokuhamba kwesikhathi ngemva kokubona umlayezo!
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