Pump cooling issues
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Some of the pumps in our equipment are equipped with cooling water, while others are not. I would like to ask what determines whether a pump needs cooling – are there any standards or regulations for this? Also, is the cooling of the pump proposed by the process engineering team at the design institute, or by the pump manufacturer?
Cooling is essentially required for some large pumps; the specific requirements regarding the amount of coolant are determined by the pump manufacturer, while the design agency is responsible for arranging its supply.
The flushing water or cooling water for the pump is determined by the pump’s sealing and flushing schemes. There is a standard for this. It is generally determined by the pump engineering specialists and manufacturers
Let’s talk about our approach. There should be standards regarding cooling, but with more experience, one naturally develops knowledge in this area. I don’t have that much experience, but among the several types of centrifugal pumps that are commonly used, those used in cooling systems are the most frequent – for example, in situations where the temperature of the fluid is high (around 200 degrees or more), or when the motor has a high power rating. In short, these pumps are used to prevent the pump itself from overheating, thereby protecting the equipment and extending its service life. However, it is the manufacturer who decides whether cooling water protection is necessary; manufacturers that require a cooling water system will supply it as a complete set, and the design institute can then handle the piping.
Whether cooling water is required is determined based on the medium and operating conditions of the pump; there are no standard specifications for this. As for the type of cooling method to be used, however, there are standard regulations in place, and these are quite detailed. One can refer to the Chinese version of API610, which provides thorough explanations on this topic. Of course, centrifugal pumps and reciprocating pumps are also different.
1. Whether cooling water is required for the pump is determined by the pump manufacturer； 2. The design institute provides the manufacturer with the parameters of the medium to be used by the pump, and it is the manufacturer who selects the appropriate model ； 3. The design institute receives the pump manufacturer’s selection results and arranges the piping according to the pump’s structure ； 4. Therefore, whether cooling water is required is ultimately determined by the pump manufacturer; if the design institute fails to make the proper design, it is the design institute that is responsible. Whether such a design is reasonable or not is not decided by the design institute and the client! ! !
When the medium pumped by the pump is above 100 degrees, the bearings need to be cooled. If it is greater than 150, the sealing chamber needs to be cooled. If it is greater than 200, the pump support needs to be cooled. Because: to ensure the bearing does not overheat. Frictional heat is generated when it is transmitted. Improve the operating conditions of mechanical seals. Support for the cooling pump to prevent deviations in shaft alignment.
I think it is determined by the manufacturer; the design institute proposed the conditions regarding the flowing medium and its parameters. Of course, there are precedents in terms of design that can be used to put forward requirements to the manufacturers in advance.
Whether the pump is equipped with cooling water or uses another cooling scheme is determined by the pump manufacturer, based on the operating and design parameters of the pump provided by the process engineering department of the design institute. The pump manufacturer returns the conditions to the design institute, which then confirms them and handles the piping.
As far as I know, pumps can be cooled either by water or by oil, and this depends on the original design of the pump. Nowadays, many pumps have had their cooling methods changed, so water cooling is no longer used.
Both heat pumps and pumps with higher power levels have cooling water. Whether cooling is required is determined by the pump manufacturer.