How can I determine the headloss through a hydropneumatic tank for a given timestep?
There is no direct way to report it, but it can be derived from the text report. First, enter a number in the “report period” field of the hydropneumatic tank, which represents the increment of timesteps at which some extended data will be reported. Then, re-compute the transient simulation. Go to reports > transient analysis reports > transient analysis detailed report. Scroll down (likely very close to the bottom) and you’ll see a table starting with ” ** Gas vessel at node X ** “, including “time”, “volume”, “head-gas”, “head-pipe” and “inflow”. To determine the headloss, look at the difference between the values for “head-pipe” and “head-gas”. When the value for “inflow” is positive, that means the tank is filling, so the head in the tank (head-gas) may be less than the head in the pipe (head-pipe) due to inflow headlosses. When the “inflow” is negative, that means the tank is draining, so the head-pipe may be less than the head-gas due to outflow headlosses.
