The discussion revolves around the work done, power, and efficiency calculations for a multistage compressor, focusing on the relationships and equations that can be used to model such systems. Participants explore the derivation of these relationships, the need for specific parameters, and the implications of design choices such as intercooling.
Participants generally agree on the need for specific parameters and equations to model the multistage compressor, but there is no consensus on the best approach or the specific equations to use. Multiple competing views and uncertainties remain regarding the optimal design and calculations.
Participants express limitations in their knowledge of design specifications and details necessary for accurate calculations. There are unresolved aspects regarding the derivation of relationships and the implications of intercooling on performance.
This is a series of continuous flow compressors, right?vishnu123 said:no i have'nt i wam looking for how to model the compressor. I don't have any details or design specifications of the compressor. all I know is jus the input pressurem of 1bar and massflow rate of the gas and the output pressure of 80bars. With the basic calculations formulas I can calculate the power required for a single stage. I need few details about, what's the optimal pressure ratio for the compressor and any relation to find the final output pressure at the last stage of the compressor.
the equations i know are:
Pressure ratio = (P_out/P_in)^(1/n)
total work = (n*k*P_in*V_in)/(k-1)*((P_(2*n)/P_in)^((k-1)/2n)-1)
where, n = number of stages
k = heat capacity ratio
V_in = inlet volume of gas
and i also need to find the efficiency of the compressor.