Can ethylene glycol be used as a heating medium?
Thread Content
Ethylene glycol solution is most commonly used as a refrigerant, but can it be used as a heating medium at the same time? condition: when refrigerant: Temperature -10 degrees ； when hot media: Temperature 150 degrees ； Need to be used alternately within equipment jackets or coils. Friends with experience in using it can give me some advice. If there are other media that can be used under the above conditions, please provide them.
It is not recommended to use. Ethylene glycol has certain toxicity, relatively active chemical properties, and a relatively low boiling point. You can look for a certain brand of heat transfer oil, or directly ask the manufacturer. Ethylene glycol is a colorless viscous liquid.； Melting point -11.5°C, boiling point 198°C, relative density 1.1088 (20/4°C). Its chemical properties are similar to ethanol. It can mainly react with inorganic or organic acids to form esters. Generally, only one hydroxyl group reacts first. By raising the temperature and increasing the amount of acid, both hydroxyl groups can form esters. toxicity: It is of low toxicity. acute toxicity: LD508.0～15.3g/kg (orally administered to mice) ； 5.9～13.4g/kg (rat oral) ； 1.4ml/kg (human oral, lethal) Subacute and chronic toxicity: After rats inhaled 12 mg/m3 (several times) for eight days, 2/15 animals had corneal opacity and blindness. ； 9/28 people suffered temporary fainting after inhaling a 40% ethylene glycol mixture ； When people inhaled a 40% ethylene glycol mixture heated to 105°C and inhaled repeatedly, 14/38 people had nystagmus and 5/38 people had lymphocytosis. Hazardous properties: In case of open flame, high heat or contact with oxidants, there is a risk of combustion and explosion. If exposed to high heat, the internal pressure of the container will increase and there is a risk of cracking and explosion.