Cavitation of the pump
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In a certain renovation project, the water in the heat exchanger is close to the boiling point; a pump is connected to the outlet. Due to space constraints, the pump’s inlet pipeline has to run under the floor, which results in the formation of air pockets. The operating conditions on site are not very stable, and cavitation occurs occasionally. How should this be addressed? The pump inlet pipeline was originally insulated, but it has now been modified to be heat-resistant. What other solutions are available?
This post was last edited by altpage on 2016-6-12 at 10:43. First, determine whether the water temperature rises in the heat exchanger In that case, 1. change the pump’s extraction location to draw from in front of the heat exchanger and send the fluid to the heat exchanger; the rest of the process remains unchanged. 2. If the heat exchanger has a bypass, use it to slightly reduce the heat exchange temperature, resulting in a slight loss of recovered thermal energy. 3. Add an appropriate amount of cold water to the pump inlet and mix it with this hot water; it is necessary to ensure a good mixture without causing water hammer, while also reducing the temperature of the hot water as much as possible. 4. What is the quality of this water? If not controlled properly, such high temperatures can prevent scaling.
Thank you; there is a plan to implement the third option on site, and it is currently under discussion.