How can water be kept at 40°C or -8°C continuously?
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We need to conduct a corrosion test, requiring the corrosion solution to be maintained at 40°C and -20°C for 24 hours. How can this be achieved?
Is it between 40°C and -20°C? Use corrosion-resistant heat exchangers.
No, it’s 40°C or -8°C; it’s not within that range. I’m not sure if there’s any good solution.
At 40°C, it’s a bit easier to handle; a temperature control valve can be installed. -8 is a bit more difficult.
40 degrees means heating; minus 8 degrees – can’t the refrigerator be used?
If it’s a proper experiment, it wouldn’t be appropriate to keep it in a refrigerator, right? The accuracy of the temperature would be uncertain. Besides, would that company actually set up a refrigerator there for conducting experiments?
Are you referring to the device similar to the one on the low-temperature tank of an impact testing machine? I just don’t know if there are any larger ones.
What should I do with the temperature control valve? I’ve never seen it; can the temperature be kept constant?
You need to learn both processes and instrumentation*.
You just need to buy a set of water bath or oil bath equipment with constant temperature control. Low-temperature liquids can be salt solutions or ethylene glycol solutions. Furthermore, pure water cannot stably maintain a temperature of -8 degrees under normal pressure.