Plant engineering calculator · Updated 17 September 2026
Deaerator Storage Sizing Calculator — Hold-Up Time, Working Volume & Tank Capacity
Size deaerator storage from boiler-feedwater demand, required hold-up time, usable tank fraction and design margin. Returns working water volume, minimum gross vessel volume and stored mass.
Inputs
Live results
- Working water volume 20 m³
- Minimum gross storage 32.857143 m³
- Stored working mass 19.2 t
- Gross/working ratio 1.6428571
Formula and method
Vworking=Q×t/60; Vgross=Vworking×margin/usableFraction.
Worked example
At 120 m³/h with 10 minutes hold-up, 20 m³ working water is required before margin and usable-level allowance.
Engineering assumptions and limits
- Flow is the governing feedwater demand during the design case.
- Usable fraction represents the controlled operating volume between practical low and high levels, not total geometric vessel volume.
Frequently asked questions
What does this Deaerator Storage Sizing Calculator calculate?
Size deaerator storage from boiler-feedwater demand, required hold-up time, usable tank fraction and design margin. Returns working water volume, minimum gross vessel volume and stored mass.
Is this a final equipment selection?
No. Use the result for engineering screening, then verify vendor data, controls, operating cases, codes and project design criteria.
Why does the calculator show intermediate values?
Intermediate values expose the governing load and assumptions, making bad units or unrealistic operating conditions easier to spot before selection.