![]() I don't know that you are completely off the mark, but you would be limiting some calculations unnecessarily. RE: Specific heat ratio in gas compression zdas04 (Mechanical) 2 Apr 18 23:53 Would this be more accurate or am I completely off the mark, in which case please excuse my ignorance. T2/T1 = (P2/P1)^ (Indices 1,2 referring to inlet, respectively outlet.) In other words, this would be equivalent of assuming PD compression process as subset case of a polytropic path, that is to say polytropic efficiency set equal to one, subsequently we would use kv for calculation of head and kt for temperatureĮ.g. Why don't we pick these two exponents (instead of the adiabatic exponent) for the purpose of performance calculation? ![]() So for PD compressors, I understand the head is calculated based on the adiabatic exponent (k=Cp/Cv).īut we know that when the gas behavior departs from ideal gas, isentropic exponent "split" into an "isentropic volume exponent kv" and an "isentropic temperature exponent kt". ![]() I take the occasion to ask you a question, just to better my understanding of positive displacement (PD) machines.
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