Expansion vessel sizing

[Dannypipe]

I was working out the expansion vessel required for a CH system the other day with the known formula, when the guy I was working with produced an 'app' on his iPhone that did it for you.

He downloaded it for free, and we both arrived at the same result.
I don't have an iphone, but handy for those that do, and if anyone wants to produce one that I can download for my notebook, I'm sure it would be popular.

Here's a link of it I found. Expansion Vessel Size Calculator iPhone application - AppStoreHQ

Like many things, we can work them out ourselves but sometimes it pays to let technology do the brain work for you! I have lots of stuff on my handy notebook and would like one on it.

 

[tamz]

I don't have an iPhone and no doubt it is am infinitley useful thing for many but i still like using my brain.

 

[solarCH]

I was working out the expansion vessel required for a CH system the other day with the known formula, when the guy I was working with produced an 'app' on his iPhone that did it for you.

could you post the "known formula"? I have one here based constants based on the water temp. For water at 70, it is V * 0,025/ 0,35. So for 110L of water, the vessel should be 8L.

I have also seen other formulas based on system pressure (system loss in this case is 93mBar)

thanks