Pump selection issue
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I’m new to chemical engineering design. I have a question for everyone: I need to use a water pump to supply 4 condensers, each with a surface area of 30 square meters. How many pumps should I use in the system?
The conditions are not sufficient; the height of the condenser and whether pipes already exist must all be specified.
In simple terms, the flow rate of a water pump is determined by the heat transfer capacity of the condenser, while the head is determined by parameters such as the height difference between the two ends of the equipment, pressure, flow velocity, and pressure loss. There are examples in chemical engineering principles that can be used as references.
Oh, there are pipes, and the height of the condenser is 12 meters. . . It’s quite difficult to calculate the heat transfer amount; we only know the heat transfer area. Please help us out
Based on the local climate, a value is determined for the temperature at the inlet and outlet of the condenser; the temperature difference is then calculated. This is something covered in the principles of chemical engineering. Once the amount of heat that needs to be removed is determined, the water flow rate can be calculated
The conditions provided by the poster are not sufficient. First, you need to know the inlet and outlet temperatures of the material being cooled, as well as the temperature of the cooling water entering the system. Using the heat exchange formula, you can then calculate the flow velocity; subsequently, the flow rate can be determined based on the pipe diameter ； If the flow rate meets the requirements, then calculate the resistance to determine the range.
Based on some of the parameters provided by the original poster, my understanding isn’t entirely accurate: the total amount of water required is likely less than 200 cubic meters. A head of around 22–25 should be sufficient. As for deciding how many pumps to use, that’s up to the original poster – whether to use one pump with one backup, or two pumps with one backup (in this case, the flow rate for each pump could be set at 130 cubic meters). Be sure to consult a textbook on chemical engineering principles for calculations: lol
It’s too general, but you can refer to textbooks on chemical engineering principles or process design; they contain relevant information