The most awesome startup I have ever seen.

Re:The most awesome startup I have ever seen. by DaniFong on Monday March 12, 2012 @12:26PM (#3694145)

Dude, I like your analysis and eager attempts to calibrate but you messed up your calculation somehow.

I'm pretty sure your problem is that your formula misestimates the amount of gas stored. It is compressed, you know. You of off by about a factor of 200 - we use 200 atm air. It's 1.1 MWHr per high-boy shipping container

The energy stored is

efficiencyOutgoing * P_top * V_tank * (ln pressure ratio - 1 + 1/pressure ratio) -- you can look at our patents for more detail.

[ Parent | on HN ]

Re:The most awesome startup I have ever seen. by drostie on Monday March 12, 2012 @08:13PM (#3696350)

Sorry, you're pretty much right. The equation I wrote is correct, but I naively plugged in a bad number: yes, P₀ V₀ = n R T = P₁ V₁, but I used the known number for V₁ (the final air in the container) as V₀. The proper formula is indeed P₁ V₁ ln(P₁ / P₀).

You have my apologies for my confusion.

[ Parent | on HN ]