Jump to content

water air composite pressure system

Recommended Posts

Hi all,

I,m plannig to conduct one experiment, but before that I wanted it confirm whether my idea has got some scence.

My query is lets consider we have 3 types of system


1.Closed air tank at 10 bar pressure.

It will have pressure* volume = 10*105*1= 1000 KJ energy.


2. Water tank of volume 1 cum and height of water 1 m.

It will have 5.04*h2 = 5.04 KJ (h= water head pressure)


3. Now lets say we have 2 cum of closed volume containing water of 1 cum and 1 cum air at 10 bar.

can I say we have energy in water= 5.01*1002 = 50400 KJ (10 bar=100 m of water)

plus when water is out of tank volume of air will be 2 cum at 5 bar.

then energy stored in air (considering isothermal expansion)= 500 KJ

so total 50900 KJ.


Am I doing wrong some where/ everywhere then where is it wrong?

If not why there is so diffrence in energy?

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.