Document Type : Original Paper

Authors

1 industry engineering ,shomal university,amol,iran

2 industrial engineering,MehrAlborz university,tehran,iran

Abstract

Nowadays, centrifugal compressors are commonly used in the oil and gas industry, particularly in the energy transmission facilities just like a gas pipeline stations. Therefore, these machines with different operational circumstances and thermodynamic characteristics are to be exploited according to the operational necessities. Generally, the most important operational parameters of a gas pipeline booster station includes the compressor's input and output pressures, input and output temperatures and also the flow rate passing from the compressors. Different values of those parameters related to every point of operational conditions will exactly affect on the compressor poly-tropic efficiency and their driver fuel consumption. Although, calculating of the poly tropic efficiency and fuel consumption using the existing thermodynamic relations, would need to apply rather awkward equations for each operating point. In this research, a feed forward perceptron artificial neural network is presented to predict the output operational conditions. The network would be trained at least in two scenarios applying by practical data in the neuro solution software version.5 using the Levenberg-Marquadt algorithm and the optimum model is experimentally selected according to R2, MSE and NMSE.

Keywords

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Nomenclature

A,B,C,D,E,F

Regression coefficients

Pout

Gas station outlet pressur

Tsuc

Compressor input temperature

FC

Fuel consumption

Psuc

Compressor suction pressure

Z

Compressibility coefficient

HP

Compressor poly tropic head

Pt.rpm

Lp turbine speed

α

Power corrective coefficient

HV

Heating value

q, Q

Flow rate

ηm

Lp tubine mechanical efficiency

k

Poly tropic index

Qac

Real flow rate

ηp

Compressor poly tropic efficiency

MSE

Mean of standard error

Qst

Standard flow rate

ηt

Hp turbine thermal efficiency

MAE

Maximum absolute error

R2

Regression R square

λmax

Maximum eigenvalue

NMSE

Normal mean of standard error

S

Compressor speed

λmin

Minimum eigenvalue

no

Number of compressor

Tamb

Ambient temperature

 

 

Pdis

Compressor output pressure

Tdis Tout

Compressor output temperature

 

 

Pin

Gas station inlet pressure

Tin

Gas station inlet temperature

 

 

 

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