In chemical engineering processes, what does \"cold water at -35°C\" mean?
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A question from a beginner: For example, in chemical processing, the labeling on equipment pipes indicates \"-35°C cold water\". But I see that the actual temperature gauge shows -25°C (the temperature gauge is working properly, and the actual temperature is indeed -25°C); so why is it still indicated as -35°C cold water? I asked the veteran workers, and they told me that it has always been called that way. May I ask which expert can offer some guidance?
It should be frozen saline for industrial use, or a low-temperature coolant. It would be best for the poster to describe both the medium in that pipeline and its role in the manufacturing process.
This post was last edited by Xiaoxin_ZVYyp on 2020-10-20 at 11:28. The label indicates -35°C for the frozen saline, and the actual temperature is also that of frozen saline, which is actually -25°C. It could also be a designation based on the -35°C operating temperature of the refrigerant.
This post was last edited by qugd on 2020-10-20 at 14:57. Since it is indicated as frozen saline, why was cold water mentioned in the first post? Did you come here on purpose to be annoying?
This post was last edited by Xiaoxin_ZVYyp on 2020-10-20 at 15:34. My question arose because the information provided on site was unclear and inaccurate. The sign on site read “-35°C cold water”; I confirmed with the process engineers that the medium in question was chilled brine. If this expert really has experience or can help clarify things, I would be very welcome to that. But getting pedantic has nothing to do with your level of expertise in chemical engineering. Furthermore, forums are platforms for communication. There is a difference between frozen saltwater and cold water, but that has nothing to do with nonsense; whether something is nonsense or not depends on whether it comes from a professional. Even chatting with experts can be rewarding
The person upstairs is truly an expert; take a look at some of the problems he analyzed in the past. As for why it is called -35-degree chilled water, it is likely that the designed temperature is -35 degrees, which represents the lowest temperature level that can be achieved.