Hi Paul,
Something isn't adding for the piping losses for molten salt SPT.
In the tower and receiver input page the piping heat loss coefficient is weirdly given in units of Wt/2K. These units are either incorrect or the equation stated further down is incorrect:
"The calculated thermal energy loss due to header piping, applied whenever the receiver is operating.Total Piping Loss (kWt) = Piping Length (m) × Piping Heat Loss Coefficient (Wt/m) ÷ 1000 (kW/W)"
Which is it? Surely it is the latter, but then if it is and you use the default value of 2, the value you calculate manually and that calculated in SAM are TOTALLY different.
If I have a tower height of 90m, use a pipe length multiplier of 2.6, pipe constant of 0 and the default value of 2 (units???) then following the equation I should get an answer in SAM of :
90*2.6*2/1000 = 0.468 kW.
However this doesn't happen, instead I get a value of 367.2 kW within SAM, so something is reeeally off here.
Please could you help urgently?
Thank you
Harry
