Weekly Topic 2.21, Issue 15: Types of Synthetic Water Coolers
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This post was last edited by Qingfeng Liushui on 2011-2-20 at 21:15. Let’s discuss the different types of synthetic water coolers used in various companies, as well as their operating conditions and analysis. This is just a starting point; for example: Synthesis process: Casali. Water cooler type: Horizontal type, with water flowing through the shell side. Operating conditions: The temperature on the side where the process materials are handled is relatively high, reaching up to 62 degrees. Reason: It’s not clear; during minor maintenance, only the cover was opened, and no obvious problems were found； Casali also failed to provide a reasonable explanation
Reply to 1# wawjia: This issue might be caused by scale on the circulating water side, which reduces the heat exchange efficiency, or by an increased circulation rate that increases the cooling load.
Reply to 2# Qingfeng Liushui: No, after opening the water cooler, it was found that scaling on the water side wasn’t very noticeable, and the pressure of the circulating water was also normal. According to the people from the design institute, it might be due to a small heat exchange area, but it’s not necessarily that the reason.
Has there been any change in the pressure difference of the system? The tube side of the water cooler might have wax buildup!
Reply to 4# 654262293: The pressure difference is not much different from normal, and the waxing phenomenon is not very severe either! So it feels really strange!
Is the temperature of the circulating water too high, or are there other branches?
Reply to 6# lxy8207: There isn’t any either; all the process conditions are quite normal! It feels strange, so I’m asking everyone about the performance of their water coolers – have they encountered the same issue?
Synthesis process: Ruchi type. Water cooler type: Horizontal, with water flowing in the tube side. Operating condition: The temperature on the side of the process materials is normal, around 40 degrees generally -
Here, when there is no wax formation, the temperature of the circulating air at the outlet of the water cooler is at least in the 30s degrees; as time goes by, this temperature gradually rises to over 50 degrees. Wax needs to be heated online regularly. Does the temperature rise as soon as you start the vehicle? If the temperature rises as soon as the vehicle starts running, it’s likely that the heat exchange area is too small.
Reply to 9# 654262293: Yes, the load is low when the vehicle just starts running, and the temperature is normal； Later, when the load was increased, the temperature exceeded the limit. It is likely that the heat exchange area is too small, or there were issues with the process parameters specified during the design of the heat exchanger.
Could you tell me about your flow rate? What are the temperatures of the gas entering and leaving the system? What is the designed heat exchange area? What is the temperature of the inlet water, and what about the outlet water? What is the diameter of the pipes? Is there any leakage in the bypass valve? If the outlet water temperature is high and the bypass valve isn’t leaking, then it’s likely that the heat exchange area is too small; try lowering the water temperature