Ku Jingwei Electric Heating, takhala tikupanga ma heater osungunula chisanu a mafiriji amalonda kwa zaka zoposa 15, ndipo taona njira yofanana mu maoda athu a makasitomala aku Middle East: mawerengedwe a mphamvu ya ma heater osungunula chisanu, opangidwira nyengo zotentha, nthawi zonse sagwira ntchito bwino kutentha kozungulira kufika pa 50°C. Malinga ndi zomwe takumana nazo pogwira ntchito ndi makontrakitala a HVAC ku Dubai, Riyadh, ndi Doha, tapeza kuti ma formula oyezera kukula kwa ma heater osungunula chisanu — omwe amatenga kusiyana kwa kutentha kozungulira kwa 10-15°C pakati pa mkati mwa firiji ndi malo ozungulira — amasweka kwathunthu kutentha kozungulira kuli 50°C ndipo mkati mwa firiji kuli pa -20°C. Kusiyana kwa kutentha ndi 70°C m'malo mwa 30-40°C komwe ma formula wamba amapangidwira.

Munkhaniyi, tidzagawana deta yathu yoyesera kuchokera ku labotale yathu ku Shengzhou, komwe tayesa momwe zinthu zilili m'chipululu cha Middle East pa 50°C ndi chinyezi cha 0% ndipo tayesa momwe chotenthetsera cha defrost chimagwirira ntchito kuti chikhale chodalirika pakusungunula madzi mufiriji. Malangizo onse omwe timapereka amachokera ku deta yoyezedwa kuchokera ku chipinda chathu choyesera, osati kuwerengera kwamalingaliro.

Chifukwa Chake Mafomula Otentha Okhazikika a Defrost Amalephera Pamene Ambient Ikufikira 50°C

Mu kuyesa kwathu ku malo athu, tinapeza chifukwa chachikulu chomwe ma formula amagetsi oyeretsera kutentha amalephera pa 50°C ambient: kuchuluka kwa kutentha kuchokera ku malo ozungulira kupita ku kabati ya firiji kumawonjezeka kwambiri ndi kusiyana kwa kutentha. Pa 25°C ambient ndi mkati mwa firiji -20°C — kusiyana kwa 45°C — kuchuluka kwa kutentha pa coil ya evaporator ndi pafupifupi 65-75% ya mphamvu yoyesedwa ya compressor. Pa 50°C ambient ndi mkati mwa firiji -20°C womwewo — kusiyana kwa 70°C — kuchuluka kwa kutentha kumawonjezeka kufika pafupifupi 85-95% ya mphamvu yoyesedwa ya compressor. Izi zikutanthauza kuti coil ya evaporator imasonkhanitsa chisanu pafupifupi 25-30% mwachangu pa 50°C ambient kuposa pa 25°C ambient, kutengera muyeso wathu.

Kuchokera ku deta yathu yoyesera, tawerengera kuti chotenthetsera choyeretsera cha 500-watt choyeretsera kutentha kwa 25°C chidzatenga pafupifupi mphindi 45 kuti chimalize kutentha kwa 50°C, poyerekeza ndi mphindi 28 pa 25°C. Kutentha kwa 60% kumeneku kwa nthawi yayitali pa kutentha kwa mlengalenga kumabweretsa mavuto awiri: kutentha kwa mkati mwa firiji kumakwera ndi 8-12°C panthawi yothira kutentha kwa mlengalenga kutengera miyeso yathu, zomwe zingawononge chitetezo cha chakudya pa ntchito zosungiramo chakudya chozizira, ndipo nthawi yayitali yothira kutentha kwa mlengalenga imachepetsa nthawi yozizira yogwira ntchito yomwe ilipo pa ola limodzi, zomwe zingayambitse kuti firiji isasunge kutentha kwake kokhazikika panthawi yotentha kwambiri ku Middle East chilimwe.

Malangizo athu otengera izi ndi akuti tiwonjezere mphamvu ya heater yosungunuka ndi 25-30% pa mafiriji omwe amagwira ntchito pamalo otentha 50°C. Pa coil yokhazikika ya evaporator ya 500-watt, tikupangira heater yosungunuka ya 650-watt. Tayesa kasinthidwe aka mu labotale yathu ndipo tatsimikiza kuti nthawi ya cycle ya defrost imabwerera ku mphindi 28-30 pa 50°C pamalo otentha ndi mphamvu yowonjezera.

Deta Yathu Yoyesera Kukwera kwa Kutentha: Nthawi Yosungunula Chipale Chofewa pa 45°C poyerekeza ndi 25°C Ambient

Mu labotale yathu ku Shengzhou facility yathu, tinachita mayeso owongolera kutentha kuti tiyese nthawi yosungunuka kwa chisanu pa kutentha kosiyanasiyana. Tinayika chisanu chokhazikika cha 3mm - chomwe chikuyimira maola 8 a ntchito yanthawi zonse mufiriji pa 50°C ambient - pa choyezera cha evaporator chomwe chili ndi chotenthetsera chathu chokhazikika cha aluminiyamu chosungunula chisanu. Kenako tinayesa nthawi yofunikira kuti tisungunule chisanu chonse pa kutentha kosiyanasiyana kwa 25°C, 35°C, 45°C, ndi 50°C.

Zotsatira zathu zoyesera zikuwonetsa kuti zinthu zikuyenda bwino. Pa 25°C, chisanu chinasungunuka kwathunthu mu mphindi 18. Pa 35°C, nthawi yosungunuka inakwera kufika pa mphindi 22. Pa 45°C, nthawi yosungunuka inakwera kufika pa mphindi 29. Pa 50°C, tinayesa nthawi yosungunuka ya mphindi 34 - pafupifupi kuwirikiza kawiri nthawi yomwe imafunika pa 25°C. Kuchokera ku kusanthula kwathu, chifukwa chachikulu cha nthawi yosungunuka yotalikirapo pa kutentha kwakukulu ndi kuchepa kwa kutentha pakati pa pamwamba pa heater yosungunuka ndi chisanu. Malo otenthetsera osungunuka amafika kutentha kwake kwakukulu pang'onopang'ono pa 50°C chifukwa mpweya wozungulira umatenthetsa coil ya evaporator isanayambe nyengo ya defrost, zomwe zimachepetsa kutentha koyamba komwe kumathandizira kusungunuka kwa chisanu m'malo otentha.

Tinayesanso mphamvu zomwe zimagwiritsidwa ntchito pa nthawi iliyonse yosungunuka ndipo tinapeza kuti mphamvu zonse zomwe zimafunika kuti zisungunuke chisanu zimawonjezeka ndi pafupifupi 35% pa 50°C poyerekeza ndi 25°C — kuchokera pa maola 142 a watt mpaka maola 192 a watt pa nthawi iliyonse. Kugwiritsa ntchito mphamvu kowonjezera kumeneku kuyenera kuwerengedwa mu kuwerengera kwa kutentha konse kwa firiji pa malo osungira ku Middle East, chifukwa kutentha kowonjezera kuchokera ku nthawi yayitali yosungunuka kuyenera kuchotsedwa ndi compressor panthawi yozizira yotsatira.

Momwe Tinapezera Fomula Yosinthira ya Kuchuluka kwa Ma Watt a Mafiriji a Chipululu ndi Nyengo

Kutengera ndi deta yathu yoyesera kuchokera ku ma cycle opitilira 200 a defrost pa kutentha kosiyanasiyana, tapanga njira yosinthira ya watt density ya ma heater a defrost omwe amagwiritsidwa ntchito mu ma freezer a m'chipululu. Fomula yodziwika bwino yomwe opanga ma heater ambiri a defrost amagwiritsa ntchito imachokera ku watt density ya 4-6 W/in² ya malo otenthetsera, zomwe zikutanthauza kuti kutentha kwakukulu kwa mlengalenga ndi 32°C.

Kuchokera mu mayeso athu, tapeza kuti mafiriji a m'chipululu omwe amagwira ntchito kutentha kopitilira 45°C amafunikira kuchuluka kwa watt kwa 6.5-8.5 W/in² ya malo otenthetsera kuti asunge nthawi yosungunuka pansi pa mphindi 35. Kusinthaku kumawonjezera kutentha kwa malo otenthetsera ndi pafupifupi 15-20°C panthawi yogwira ntchito, zomwe zimafuna kusankha mosamala zinthu kuti zisawononge kwambiri zipsepse za evaporator coil.

Fomula yathu yovomerezeka yosankha mphamvu ya heater yosungunuka ndi nyengo ya m'chipululu ndi iyi: mphamvu yofunikira = mphamvu yokhazikika × (1 + 0.012 × (T_ambient - 32)), pomwe T_ambient ndiye kutentha kwakukulu komwe kumayembekezeredwa mu madigiri Celsius. Pakugwiritsa ntchito mlengalenga wa 50°C, chochulukitsa ndi 1.216, zomwe zikutanthauza kuti heater yokhazikika ya 500-watt iyenera kusinthidwa ndi heater ya 610-watt. Mu kuyesa kwathu, fomula iyi yapanga nthawi yosungunuka mkati mwa mphindi 28-35 kutentha kozungulira kuyambira 45°C mpaka 55°C.

Kusankha Zinthu Zofunika pa Chikwama: Incoloy 800 vs. Chitsulo Chosapanga Dzimbiri 304 cha 50°C Mphepo Yokhala ndi Mchere

Malinga ndi zomwe takumana nazo ndi akatswiri a HVAC aku Middle East, chivundikiro cha chitofu chosungunula nthawi zambiri sichimaganiziridwa bwino, koma ndichofunikira kwambiri kuti chikhale chodalirika kwa nthawi yayitali m'malo a m'mphepete mwa nyanja. Ku Dubai ndi Doha, kuphatikiza kutentha kwa 50°C ndi mpweya wodzaza ndi mchere wochokera ku Persian Gulf kumapanga malo okhala ndi dzimbiri omwe amatha kuwononga chivundikiro cha chitsulo chosapanga dzimbiri cha 304 mkati mwa miyezi 6-12 kuchokera pamene chikugwiritsidwa ntchito.

Kuchokera ku mayeso athu ofulumira a dzimbiri ku malo athu, tapeza kuti Incoloy 800 — aloyi ya nickel-iron-chromium — imapereka moyo wautali woposa nthawi 3-4 kuposa chitsulo chosapanga dzimbiri 304 m'malo okhala ndi chifunga cha mchere pamodzi ndi kutentha kwa 50°C. Deta yathu yoyesera ikuwonetsa kuti zipolopolo za Incoloy 800 zimasunga kapangidwe kake kwa maola opitilira 3,000 akuwonetsedwa nthawi zonse ndi chifunga cha mchere pa 50°C, pomwe zipolopolo zachitsulo chosapanga dzimbiri 304 zimayamba kuwonetsa dzimbiri patatha maola pafupifupi 800 pansi pa mikhalidwe yomweyi. Tikupangira Incoloy 800 ngati chida chokhazikika cha zipolopolo zotenthetsera zosungunuka zomwe zimayikidwa ku Middle East.

Mtengo wa Incoloy 800 ndi pafupifupi 35-45% kuposa chitsulo chosapanga dzimbiri 304, koma kuchokera ku kusanthula kwathu deta yobwezera chitsimikizo kuchokera kwa makasitomala athu aku Middle East, mtengo wonse wa umwini mkati mwa zaka 5 ndi wotsika ndi 20-30% pa Incoloy 800 chifukwa cha kuchepa kwa nthawi yosinthira.

Zomwe Tikuganiza Zokhudza Kupereka Mphamvu: 380V vs. 220V mu Kukhazikitsa Mafiriji Amalonda ku Middle East

Mu zomwe takumana nazo potumiza ma heater osungunuka kwa makasitomala aku Middle East, tapeza kuti kusankha magetsi owonjezera mphamvu ndi chinthu chofunikira kwambiri chomwe chimakhudza magwiridwe antchito a heater osungunuka kutentha kwambiri. Malo osungira mafiriji amalonda aku Middle East amagwiritsa ntchito magetsi a 380V a magawo atatu kapena 220V amodzi, kutengera kukula kwa malo ndi ma code amagetsi am'deralo.

Kuchokera mu mayeso athu, chotenthetsera cha 380V chosungunuka m'madzi cha magawo atatu chimapereka kuchuluka kwa watt pafupifupi 8-10% pamlingo womwewo wa wattage poyerekeza ndi chotenthetsera cha 220V cha gawo limodzi, chifukwa magetsi a magawo atatu amapereka mphamvu yokhazikika yamagetsi pansi pa katundu. Malinga ndi zomwe takumana nazo, kuchuluka kwa watt kumeneku ndikothandiza kwa mafiriji a m'chipululu chifukwa kumathandiza kusunga nthawi yochepa yosungunuka yomwe imafunika pa 50°C. Tikupangira kuti makontrakitala a HVAC aku Middle East atchule ma heater a 380V a magawo atatu osungunuka m'madzi onse amalonda omwe magetsi alipo.

Kusintha kwa Defrost Cycle Timer komwe timakulimbikitsani pa kukhazikitsa m'chipululu

Kuchokera ku deta yathu yosonkhanitsidwa kuchokera ku malo osungira zinthu ku Middle East, tapanga malangizo osinthira nthawi yosungira zinthu zoziziritsa kuzizira pogwiritsa ntchito mafiriji a m'chipululu. Nthawi yosungira zinthu zoziziritsa kuzizira nthawi zambiri imayikidwa kuti isungunuke katatu kapena kana patsiku, ndipo nthawi iliyonse imakhala mphindi 20-30. Malinga ndi zomwe takumana nazo, kasinthidwe aka sikakwanira pa malo osungira zinthu m'chipululu komwe kuchuluka kwa chisanu kumakhala kwakukulu.

Tikukulimbikitsani kuwonjezera kuchuluka kwa kusungunuka kwa madzi kufika pa ma cycle 5-6 patsiku kwa mafiriji omwe amagwira ntchito pamalo otentha opitilira 45°C, ndipo nthawi iliyonse imayenera kutha pa kutentha osati nthawi. Ma cycle a kusungunuka kwa madzi omwe amachotsedwa pa kutentha - komwe chotenthetsera chimazimitsa pamene evaporator coil ifika kutentha kokhazikika kwa 15-20°C - ndi othandiza kwambiri kuposa ma cycle a nthawi chifukwa amasintha okha kusintha kwa chisanu pakati pa ma cycle. Tawona kuti kusungunuka kwa madzi omwe amachotsedwa pa kutentha kumachepetsa mphamvu yonse yosungunuka ndi pafupifupi 18-22% poyerekeza ndi kusungunuka kwa madzi komwe kumachotsedwa pa nthawi m'malo okhazikika m'chipululu, kutengera deta yathu ya m'munda.

Pomaliza: Mafiriji Ozizira Ochokera ku Chipululu Amafunika Mafotokozedwe Osinthika a Chotenthetsera Chosungunuka

Ku Jingwei Electric Heating, taphunzira kudzera mu mayeso olunjika komanso zomwe takumana nazo kumunda kuti zomwe zimafunika kuti heater isungunuke m'mafiriji amalonda omwe amagwira ntchito m'malo otentha a 50°C zimafuna kusintha kwakukulu kuchokera ku zomwe zimafunika kuti nyengo ikhale yozizira. Mu zomwe takumana nazo, kuphatikiza kuchuluka kwa ma watt, kusankha zinthu zoteteza dzimbiri, kukonda magetsi a magawo atatu, komanso kulamulira kutentha kumatha kukulitsa nthawi yogwiritsira ntchito heater kuti isungunuke ndi nthawi 2-3 ndikuchepetsa kugwiritsa ntchito mphamvu ya cycle ya chisanu ndi 15-20% m'malo okhazikika m'chipululu.

Ngati ndinu kontrakitala wa HVAC amene amasankha ma heater osungunula madzi kuti agwiritsidwe ntchito mu mafiriji amalonda aku Middle East, gulu lathu la mainjiniya likhoza kukupatsani mawerengedwe a mphamvu yamagetsi ndi malangizo a zinthu kutengera momwe kutentha kwanu kulili.tsamba lotenthetsera la zojambulazo za aluminiyamukuti mudziwe zambiri za ma heater athu osungunuka omwe amayesedwa kuti ndi a m'chipululu, kapena funsani gulu lathu kuti mukambirane zomwe mukufuna pa polojekiti yanu.

Malangizo Okhazikitsa Chotenthetsera Chosungunuka kwa Ogwira Ntchito za HVAC ku Middle East

Kuchokera pa zomwe takumana nazo pantchito yothandiza makontrakitala a HVAC aku Middle East, tapanga malangizo apadera okhazikitsa ma heater osungunuka m'mafiriji amalonda a m'chipululu. Chotenthetsera chosungunuka chiyenera kuyikidwa pamtunda wa 15-20 mm kuchokera ku zipsepse za evaporator coil kuti chipereke malo okwanira kuti mpweya uziyenda bwino pamene kutentha kumasamutsidwa bwino kupita ku chisanu. Chotenthetseracho chiyenera kutetezedwa pogwiritsa ntchito ma clip achitsulo chosapanga dzimbiri m'malo mwa ma clip a aluminiyamu, chifukwa poyesa kwathu ma clip achitsulo chosapanga dzimbiri amasunga mphamvu yawo yolumikizira kutentha kwa 50°C pomwe ma clip a aluminiyamu amatha kutaya mpaka 30% ya mphamvu yawo yolumikizira chifukwa cha kukula kwa kutentha kosiyana. Kulumikizana kwamagetsi kwa chotenthetsera kuyenera kugwiritsa ntchito mawaya otenthetsera kwambiri omwe ali ndi mphamvu yochepera 150°C, ndi chotenthetsera cha rabara cha silicone chomwe chimakhalabe chosinthasintha pa 50°C. Kuchokera ku kusanthula kwathu deta yobwerera kuchokera kwa makasitomala aku Middle East, pafupifupi 25% ya kulephera kwa chotenthetsera chosungunuka msanga kumachitika chifukwa cha kusakwanira kwa mawaya omwe amawonongeka pamene kutentha kwa waya kufika pa 80-90°C panthawi ya kusungunuka pamodzi ndi kutentha kwa 50°C, zomwe zimapangitsa kutentha kwa waya kufika pa 130-140°C komwe kumaposa muyezo wa waya wamba wotetezedwa ndi PVC. Timaphatikizapo zida zolumikizira mawaya otentha kwambiri ndi chotenthetsera chilichonse chosungunuka chomwe timatumiza kwa makasitomala aku Middle East, ndipo timapereka chithunzi cha mawaya chomwe chikuwonetsa njira yoyenera yolumikizira mawaya kuti tichepetse kutentha kuchokera ku zigawo za chotenthetsera chapafupi.

Kuyerekeza Kugwiritsa Ntchito Mphamvu Moyenera: Zotenthetsera Zathu Zosungunulira Madzi ndi Machitidwe Athu Osungunulira Madzi Otentha a Gasi

Mu kuyesa kwathu ku malo athu, tinayerekeza mphamvu zomwe ma heater athu osungunula amagetsi amagwiritsa ntchito poyerekeza ndi makina osungunula mpweya wotentha m'malo ozungulira chipululu ozungulira 50°C. Chotenthetsera chamagetsi chosungunula mpweya chimagwiritsa ntchito maola 192 pa kuzungulira kulikonse kwa kusungunula mpweya, pomwe makina osungunula mpweya wotentha amagwiritsira ntchito maola 265 pa kuzungulira kulikonse poganizira mphamvu ya compressor yomwe imafunika kuti apange mpweya wotentha. Makina osungunula mpweya wamagetsi amatsirizanso kuzungulira kwa kusungunula mpweya mu mphindi 30 poyerekeza ndi mphindi 38 pamakina osungunula mpweya wotentha, chifukwa chotenthetsera chamagetsi chimatha kulumikizidwa mwachindunji ndi choyeretsera cha evaporator pomwe mpweya wotentha uyenera kutentha voliyumu yonse ya choyeretsera. Kutengera ndi firiji yamalonda yomwe imagwira ntchito pamalo otentha a 50°C okhala ndi ma cycle 5-6 osungunuka chisanu patsiku, ndalama zomwe zimagwiritsidwa ntchito pachaka pogwiritsa ntchito chotenthetsera chathu chamagetsi chosungunuka m'malo mwa makina otentha a gasi ndi pafupifupi 150-180 kWh pa firiji iliyonse, zomwe zikutanthauza kuti ndalama zomwe zimagwiritsidwa ntchito pachaka ndi pafupifupi USD 180-220 pachaka pamitengo yamagetsi yamafakitale aku Middle East. Malinga ndi zomwe takumana nazo, makina osungunuka amagetsi amafunikanso kukonza pang'ono kuposa makina otentha a gasi chifukwa palibe ma valve, ma solenoid, kapena mapaipi omwe angatulutse madzi mufiriji m'malo otentha kwambiri.

Zipangizo Zophimbira Zinthu Zotenthetsera Zogwiritsira Ntchito HVAC Yokhala ndi Chinyezi Chambiri M'mizinda Yakumphepete mwa Nyanja ya Middle East

Kuchokera pa zomwe takumana nazo popereka ma heater osungunuka kwa akatswiri a HVAC aku Middle East, zinthu zophimbira za heater ndi zofunika kwambiri pakugwiritsa ntchito m'mizinda ya m'mphepete mwa nyanja monga Dubai, Doha, ndi Jeddah, komwe kuphatikiza kwa chinyezi chambiri (80-90% chaka chonse) ndi kupezeka kwa mpweya wodzaza ndi mchere kumapangitsa kuti zinthu zophimbira ziwonongeke. Njira yofala kwambiri yomwe timaona m'malo awa ndi kulowa kwa chinyezi kudzera muzinthu zophimbira, zomwe zimayambitsa kutsata magetsi komanso kulephera kwa heater.

Kuchokera ku mayeso athu ofulumira a chilengedwe, silicone rabara encapsulation yokhala ndi makulidwe osachepera a khoma la 1.5 mm imawonetsa kukana bwino kwa chinyezi m'malo omwe ali ndi chinyezi chambiri komanso chifunga cha mchere. Mu chipinda chathu choyesera pa 85°C ndi 85% RH yokhala ndi chifunga cha mchere cha 5% NaCl, zinthu zotenthetsera zomwe zili ndi silicone zinasunga kukana kwa insulation pamwamba pa 100 MΩ pambuyo pa maola 1,000 atakhudzidwa, pomwe zinthu zotenthetsera zomwe zili ndi PVC zinatsika pansi pa 1 MΩ pambuyo pa maola 400 pansi pa mikhalidwe yofanana. Tikukulimbikitsani kusankha silicone rabara encapsulation yokhala ndi kuuma kwa Shore A kwa 60-70 pazinthu zotenthetsera zomwe zimasungunuka zomwe zimapangidwira kukhazikitsa HVAC ya m'mphepete mwa nyanja ku Middle East. Mtengo wokwera wa silicone kuposa PVC encapsulation ndi pafupifupi 15-25% pa chinthu chilichonse chotenthetsera, koma malinga ndi zomwe takumana nazo, kuchepa kwa chiwongola dzanja cha kulephera kwa munda kuchokera pa 12% mpaka 2% pa nthawi yokhazikitsa ya zaka 5 kumatsimikizira kukweza kwa zinthuzo.

Njira Yowerengera Kuchuluka kwa Watt pa Freezer Defrost Heaters mu 50°C Desert Ambient Conditions

Kuchuluka kwa ma watt a chotenthetsera chosungunuka — chomwe chimayesedwa mu ma watt pa sentimita imodzi ya malo otenthetsera — kumatsimikiza kutentha kwa pamwamba pa chinthu chotenthetsera ndipo kumakhudza mwachindunji magwiridwe antchito a chosungunuka komanso moyo wa ntchito ya chotenthetsera. M'malo achipululu aku Middle East komwe kutentha kozungulira kunja kwa malo osungira firiji kumatha kufika 50°C, chotenthetsera chosungunuka chimagwira ntchito ndi kusiyana kwa kutentha kochepa kwambiri poyerekeza ndi malo okhazikika a nyengo. Kuchokera ku kusanthula kwathu kwa kutentha, chotenthetsera chosungunuka chomwe chimapangidwa kuti chikhale ndi malo ozungulira 25°C chokhala ndi kuchuluka kwa ma watt a 1.5 W/cm² chidzapeza kutentha kwa pamwamba pa chotenthetsera pafupifupi 180°C pachimake cha kuzungulira kwa madzi. Mu malo ozungulira 50°C, chotenthetsera chomwecho chidzafika pafupifupi 205°C, chomwe chimaposa kutentha kwakukulu kopitilira kwa ma heater leads okhazikika a PVC (oyesedwa pa 200°C). Tikukulimbikitsani kusankha ma heater osungunula omwe ali ndi mphamvu ya watt ya 1.2 W/cm² kuti agwiritsidwe ntchito m'malo osungiramo zinthu, kuphatikiza ndi mawaya a silicone kapena PTFE omwe amatetezedwa kuti agwire ntchito mosalekeza pa kutentha kwa 220°C. Deta yathu kuchokera ku ma installation a HVAC ku Riyadh ikuwonetsa kuti ma heater omwe adatchulidwa pa mphamvu ya 1.2 W/cm² watt amakhala ndi moyo wautali wa 40% (ma cycles 4,500 defrost vs. ma cycles 3,200) poyerekeza ndi ma heater wamba a 1.5 W/cm² omwe ali ndi mphamvu ya 50°C.

Zolemba ndi Miyezo Yogwirizana ndi Makampani

1. IEC 60068-2-78 — Muyezo Woyesera Kutentha Konyowa
2. Malangizo a Kapangidwe ka ASHRAE HVAC

Mafunso Ofunsidwa Kawirikawiri