the manufacturer said it's acceptable and we are reevaluating efficiency (and power consumption),
My questions concern the evaluation of polytropic efficiency in case of wet gas,
we have measured pressures, temperatures etc. and calculated the polytropic efficiency with Prode Properties (selecting the procedure for polytropic solution with phase equilibria), at the new operating condition the value is close to the original number (0.76) for dry gas (that could be Ok since we have only 1% condensate on inlet line and dry gas at outlet),
1) to improve the accuracy, should I attempt (and why) to evaluate directly (i.e. measure) the amount of condensate on inlet line?
Actually the liquid fraction is calculated by Prode with Peng Robinson model.
2) the outlet temperature estimated with the correlation for ideal gas tout = tin*(pout/pin)^(k*eff) is very different from the value calculated with Prode Properties (Prode calculates lower temperatures), I suppose it is Ok considering we have a pressure ratio of about 4 and some condensate to evaporate.
Since for this area (wet gas compression) little documentation is available I post this topic hoping to get comments and opinions from experts in this group.
Edited by mrbabu, 09 October 2012 - 03:19 AM.