Menene Coolant?

Coolant shine kayan da ke gudana cikin fakitin baturin ku yana kiyaye sel daga dafa kansu. Kyakkyawan ra'ayi mai sauƙi amma mutane da yawa suna samun kuskure.

A cikin aikace-aikacen EV da ESS muna magana ne game da cakuda ruwa glycol{0} da ke yawo ta cikin faranti masu sanyi ko tashoshi masu sanyaya da aka ƙera cikin tsarin fakitin. Ruwan yana ɗaukar zafi daga sel, ya ɗauke shi zuwa injin sanyaya ko radiator, yana zubar da zafi, ya dawo don ƙarin. Loop yana ci gaba da gudana muddin fakitin yana aiki.

Ruwan da Kansa

Manta da duk abin da kuka sani game da sanyaya mota. Wannan koren Prestone daga AutoZone zai lalata fakitin baturi. Masu hana lalata a cikin maganin daskarewa na al'ada sune mahadi na ionic{2}}suna gudanar da wutar lantarki. Kuna gudanar da hakan ta fakitin 400V, kuna neman kurakuran ƙasa.

Mai sanyaya baturi dole ne ya cika buƙatu guda biyu waɗanda maganin daskare na yau da kullun bai damu da su ba:

Electrical resistivity above 100 kΩ·cm minimum. Most OEMs spec 150 kΩ·cm or higher. Tesla's spec calls for >200 kΩ·cm akan sabon cika.

Ion abun ciki a kasa 25 ppm. Wasu ƙayyadaddun bayanai sun ce 10 ppm. Wannan shine dalilin da ya sa ba za ku iya amfani da ruwa mai narkewa ba kawai ku haxa naku - glycol da kansa ya zama ultra{5}} tsarki.

BASF Glysantin G40 da Arteco Havoline XLC su ne biyun da za ku gani sau da yawa a fagen. Chevron kuma yana yin ƙayyadaddun tsarin baturi{2}. Waɗannan suna gudana kusan $40-60 akan galan akan $12-15 don sanyaya OAT na yau da kullun. Ya cancanta.

Mix Ratio

50/50 ethylene glycol zuwa deionized ruwa daidai ne. Wasu samarin suna gudu 60/40 a cikin yanayin sanyi. Yin sama da kashi 60% na glycol a zahiri yana cutar da ku{7}} dankowa yana hauhawa, canjin zafi yana raguwa, famfo yana aiki tukuru.

Math ɗin daskarewa:

Haɗin 50/50 yana daskarewa a kusa da -37 digiri

60/40 yana ba ku damar zuwa -52 digiri

glycol mai tsafta yana daskarewa a -12 digiri (eh, ƙara ruwa yana rage maƙasudin daskarewa, ilmin sunadarai abu ne mai ban mamaki)

Ga yawancin Arewacin Amurka 50/50 yana da kyau. Idan kuna tura fakiti a Minnesota ko Alberta, yi magana da injiniyan zafi game da samun wadata.

Yawan kwarara

Anan na fi ganin rudani. Mutane ko dai suna yin girman famfo ko rage girman su.

Lissafin ba shi da wahala. Kuna buƙatar sanin abubuwa uku: yawan zafin da fakitin ke haifarwa, wane irin zafin da za ku iya jurewa a cikin kewaye, da takamaiman zafi na coolant ku.

Don haɗuwar EG/ruwa 50/50, takamaiman zafi yana kusan 3.3 kJ/kg·K. Matsakaicin nauyin 1.07 kg / l.

Ka ce kuna da fakitin 75 kWh yana fitar da 2C. Wannan shi ne 150 kW fitarwa. Hoto na 5 -6% na samar da zafi a wannan adadin{9}}kira shi 8kW lodin thermal. Idan kuna son ci gaba da shigar da hanyar shiga delta a ƙarƙashin digiri 4:

8000 W ÷ (1.07 kg/L × 3300 J/kg·K × 4 K) × 60=34 L/min

Wannan shine ainihin lamba daga aikin gaske. Ainihin famfon da muka ƙididdige an ƙididdige 40 L/min don ba mu ɗakin kai.

Yawancin fakitin EV fasinja suna gudu 8-15 L/min a nauyin tuki na yau da kullun. Haɗawa yayin caji mai sauri ko ci gaba mai ƙarfi.

Menene Ba daidai ba

An ga wasu hanyoyin gazawa a cikin shekaru.

Nau'in sanyaya mara kyau.Babban siyayya tare da maganin daskare na al'ada yayin sabis. Haɓaka haɓakawa. BMS yana ganin laifin keɓewa, fakitin ya ƙare. Idan kun yi sa'a kawai yana jefa lambobi. Idan ba ka yi sa'a ba za ka sami arcing na ciki.

Gurbata.Abubuwan ingancin ruwa. Ɗayan rukunin yanar gizon da na yi aiki ya yi amfani da ruwan famfo don cikawar farko saboda "yana tafiya ta hanyar deionizer ta wata hanya." Sai dai sun ketare deionizer. Abubuwan da ke cikin chloride ya kasance 180 ppm. Dole ne a goge gabaɗayan tsarin kuma a maye gurbin farantin sanyi{5}}$40k aikin akan shigarwar $200k.

Lalacewa akan lokaci.Glycol oxidizes. Yana samar da glycolic acid, sannan oxalic acid. pH saukad. Ana amfani da masu hana lalata. OEMs sun ce tazarar sabis na shekara 4{6}} amma na ga coolant ya yi kyau a cikin shekaru 2 a cikin yanayin zafi mai zafi. Gwaji kowace shekara.

Iska a cikin tsarin.Jinin EV sanyaya madaukai yana da ƙarfi. Aljihun iska suna haifar da wurare masu zafi. Tantanin halitta kai tsaye a ƙarƙashin kumfa yana aiki da digiri 8-10 fiye da maƙwabta. Gaggauta tsufa, iya aiki ya ɓace, a ƙarshe da'awar garanti.

Gwajin Yanayin Sanyi

Kuna buƙatar ma'auni uku:

pH -sabon coolant yana gudanar da 7.8 zuwa 8.5 dangane da tsari. A ƙasa 7.0 yana nufin kunshin inhibitor ya ƙare. Canza shi.

Resistivity{0}mitoci masu ɗaukar nauyi sun wanzu amma suna da tsada. Aika samfurin zuwa lab idan ba ku da ɗaya. Duk wani abu da ke ƙasa da 50 kΩ·cm yana samun ƙaranci.

Glycol maida hankali -refractometer yana aiki. $30 kayan aiki, daukan 10 seconds. Kuna bincika dilution daga narkar da ruwa ko wani yana ƙara ruwa madaidaiciya.

Wasu jiragen ruwa suna yin shirye-shiryen salon nazarin mai, aika samfurori zuwa Labs na Polaris ko Blackstone kowane watanni 6. Ƙarfafawa don yawancin aikace-aikacen amma yana da ma'ana ga manyan shigarwa.

Immersion kai tsaye vs sanyayawar kai tsaye

Duk abin da ke sama yana ɗaukar sanyaya kai tsaye{0}ruwa yana gudana ta tashoshi, baya taɓa sel. Wannan shine kashi 95% na abin da ke waje.

Nitsewa kai tsaye daban. Kwayoyin suna zaune a cikin wanka na ruwan dielectric. Babu faranti mai sanyi, babu kayan mu'amalar zafi, lambobin ruwa na iya kai tsaye. Canja wurin zafi ya fi kyau. Complexity yana da ƙasa a wasu hanyoyi, mafi girma a wasu.

Ruwayoyin sun bambanta kuma{0}M Novec da Solvay Galden sune manyan sunaye. Waɗannan su ne mahadi masu fluorinated, ƙananan ƙarancin aiki, inert chemically. Hakanan tsada sosai{3}$300-400 akan kowace lita don wasu ƙira.

Nutsuwa kai tsaye yana nunawa a cikin ma'ajin grid da wasu manyan aikace-aikacen abin hawa-. Ba na al'ada ba tukuna amma aikin thermal yana da wuyar jayayya da shi.

Takaddun Taɗi

Magana mai sauri don abin da za a nema lokacin samo mai sanyaya baturi:

Sami MSDS da takardar bayanan fasaha daga mai ba da ku. Idan ba za su iya samar da bayanan tsayayya ba, nemo mai kaya daban.