Difference between nominal volume and effective volume of an expansion tank
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Hello everyone, I would like to ask how the volume of an expansion tank is calculated. I calculated it using the dimensions provided in the manual, but it seems that the result does not match the nominal volume and effective volume specified there Also, I would like to ask if there are any good recommendations for examples or textbooks on the design and calculation of expansion tanks in the closed-loop water systems of power plants Thank you!
The nominal volume refers to the rounded value of the volume calculated based on the dimensions given in the diagram. Effective volume refers to the value obtained by multiplying the total calculated volume by a coefficient of 0.7 to 0.8.
Did you pay attention to the illustrated atlas? The meaning is provided in the diagram booklet, but when I input the data to perform the calculations, the results clearly do not match the stated nominal volume. Therefore, I would like to know: for a circular water tank like this, what data should be used when calculating the nominal volume? Thank you
The nominal volume is the total volume of the container, and it is also the volume used for the hydrostatic test. The effective volume is the capacity of the container at the highest liquid level during normal operation.
The nominal volume should be the rounded value of the total volume. What I would like to know is how to calculate the nominal volume of a water tank. For example, according to the standard catalog, for a circular expansion tank model No. 1 with an inner diameter of 900 and a height of 1000, the calculated volume is 0.64 m3; why is the nominal volume only 0.5, while the effective volume is 0.6?