Mono Ethylene Glycol (MEG, chemical formula C₂H₆O₂) yog lub ntsiab active tivthaiv nyob rau hauv automotive thiab industrial coolants, muab kev tiv thaiv khov, siab boiling point kev ua tau zoo, thiab kev tiv thaiv corrosion los ntawm nws lub cev thiab cov qauv tsim ntau yam.
MEG ua haujlwm li cas hauv Cav Coolant Systems?
MEG nyob rau hauv lub tshuab coolant muab kev tiv thaiv khov, kub taw tes nce, corrosion inhibition, thiab tso nyiaj tswj, ua rau nws tus thawj thermal stability nyob rau hauv niaj hnub cav txias loops.
- Lub freezing point ntawm ntshiab MEG: -12.9 degree
- Kub taw tes ntawm Mono Ethylene Glycol: 197℃(1 atm)
- Cov dej txias ua haujlwm ntau: 40-60% MEG hauv dej
Mono Ethylene Glycol (MEG) stabilizes engine thermal systems los ntawm kev txo qis cov ntsiab lus khov rau hauv qab -40℃ntawm qhov kev xav tau zoo thiab ua kom kub kub ua haujlwm siab tshaj 110℃nyob rau hauv siab, ua kom muaj kev tiv thaiv txhua xyoo tiv thaiv ob qho tib si khov thiab kub dhau.
MEG Yuav Ua Li Cas Tiv Thaiv Kev Kho Mob thiab Kev Puas Tsuaj Rau Lub Cav?
MEG tiv thaiv kev ua kom txias txias los ntawm kev cuam tshuam kev sib txuas ntawm hydrogen hauv dej, txo qis qhov khov thiab tiv thaiv kev puas tsuaj rau cov dej khov hauv cov cua txias.
- 50% MEG freezing point: -37 degree
- 60% MEG freezing point: -48 degree
- Dej expansion siab los ntawm khov: nce mus txog 9% ntim
Monoethylene Glycol tiv thaiv kev ua haujlwm tsis ua haujlwm los ntawm kev txo qhov chaw txias txias kom deb li deb ntawm lub caij ntuj no txias, tshem tawm cov dej khov uas tuaj yeem nthuav dav thiab tawg cov cav thaiv, radiators, thiab cov kav dej hlau.
Yuav ua li cas MEG nce Boiling Point thiab Thaum tshav kub kub stability?
MEG ua kom cov dej txias ua kom kub kub los ntawm kev ua kom cov thermal stability nyob rau hauv siab, txo cov vapor tsim thiab tiv thaiv overheating nyob rau hauv siab -load engine ua hauj lwm.
- 50% Mono Ethylene Glycol boiling point: 108-110 degree
- Pressurized system boiling point: 120-130 degree
- Cov dej kub npau npau: 100 degree
Mono Ethylene Glycolelevates coolant boiling thresholds nyob rau hauv pressurized systems, tiv thaiv vapor lock thiab boil- dhau tej yam kev mob, tshwj xeeb tshaj yog nyob rau hauv siab - kub engine khiav hauj lwm siab tshaj 110℃nyob rau hauv hnyav load los yog lub caij ntuj sov tej yam kev mob.
Dab tsi yog Cov Lus Qhia Tshwj Xeeb rau Coolant -Qib MEG?
Coolant-qib MEG yuav tsum ua kom tau raws li cov purity nruj, noo noo, thiab impurity txwv kom ntseeg tau tias thermal efficiency, corrosion stability, thiab ntev - lub sij hawm system cia siab rau.
- Purity yuav tsum tau: ntau dua los yog sib npaug rau 99.9% (qib fiber ntau)
- Cov ntsiab lus dej: Tsawg dua lossis sib npaug rau 0.02%
- Hlau impurity txwv: Tsawg dua los yog sib npaug rau 0.1 ppm
High-purity MEG kom ruaj khov ua haujlwm los ntawm kev txo qis ionic contamination thiab oxidation txaus ntshai, ncaj qha txhim kho corrosion tsis kam thiab tswj kev ua haujlwm khov thiab kub kub hauv lub sijhawm ntev - lub cav ua haujlwm.
Vim li cas MEG nyiam dua lwm cov Glycols hauv Coolant Systems?
MEG kua tseem yog lub ntiaj teb no tus qauv coolant puag vim nws superior txias point depression efficiency, nqi -effectiveness, thiab thermal stability piv rau lwm glycols.
- Kev pab lub neej nrog OAT inhibitors: mus txog 5 xyoo / 240,000 km
- Kev ua tau zoo ntawm qhov chaw txias txias vs PG: ~ 10-15% kev ua haujlwm zoo dua
- Kev sib xyaw ua kom txias: 40-60% MEG + additives
MEG dominates coolant systems vim hais tias nws ua tau zoo thermal tiv thaiv ntawm tus nqi qis thiab siab efficiency dua lwm glycols, thaum tuav lub neej ntev kev pab cuam nyob rau hauv tsheb thiab industrial txias daim ntaub ntawv.
Dab tsi yog qhov kev nyab xeeb thiab tsim kev phom sij ntawm MEG Coolants?
Kev tsis zoo MEG concentration, kev sib kis, lossis kev sib xyaw tuaj yeem ua rau txo qis kev ua haujlwm thermal thiab ua rau muaj kev pheej hmoo ntawm kev ua haujlwm tsis zoo.
- Pom zoo concentration: 40-60%
- Kev siv tau siab tshaj plaws: Tsawg dua lossis sib npaug li 70% (kev ua haujlwm poob)
- Toxicity threshold: ingestion is highly toxicity (kev lag luam txaus ntshai kev faib tawm)
Monoethylene Glycol (MEG) coolant kev ua tau zoo nyob ntawm qhov tseeb concentration thiab purity tswj; Qhov sib txawv ua rau txo qis kev hloov pauv hluav taws xob, kev nrawm nrawm, thiab qhov system tsis ruaj khov hauv qhov tiag - ntiaj teb lub cav ib puag ncig.
