## Accumulators sizing for energy storage apps.

This week I worked on an accumulator sizing calculator for BOPs, so I have recovered my thermodynamic knowledge and just would like to note somewhere the materials summary and my thoughts about generic accumulator sizing for energy storage applications.

## Let’s get generic formula

First of all, all accumulator calculations based on a generic formula of the polytropic process (Ideal Gas Law):

##pV^{n}=const \hspace{35pt} (1)##

Where the specific value of #n# corresponds to particular cases:

#n=0# for isobaric process

#n=+\infty# for isochoric process

#n=1# for isothermal process

#n=\gamma# for adiabatic process

Now, take a look at the image and apply this formula for the accumulator’s 3 major work stages: