Compressor

Model interface of Compressor

This component models a compressor that compress an inlet flow, between MinFlowrate and MaxFlowrate, using electricity.

Fig. 46 I/O Compressor

The default model calculated the electrical consumption based on the following formula:

\[P=\frac{1}{\eta_is}.n.\dot{m}.c_p.T_1.(\tau^(frac{\gamma-1}{\eta.\gamma})-1)\]

It requires:

• the motor efficiency multiplied by the isentropic efficiency \(\eta_is\),

• the number of compressor stages \(n\),

• the mass flow rate \(\dot{m}\),

• the heat capacity \(c_p\),

• the inlet temperature \(T_1\),

• the isentropic coefficient \(\gamma\)

Additionally, there is a polytropic model that requires polytropic efficiency and polytropic coefficient.

Losses can be considered.

Expressions table of Compressor

See also Expressions table of TechnicalSubModel for generic options

Table. 15 Compressor

Expression name	Unit	Mandatory	Description
UsedPower	mExpUsedPower	mPortUsedPower->pFluxUnit	Computed power used by the compressor \
MaxPower	mExpSizeMax	mPortUsedPower->pFluxUnit	Maximal power used by the compressor \
InMassFlowRate	mExpInMassFlow	mPortInMassFlowRate->pFluxUnit	input flow compressed by the compressor \
OutMassFlowRate	mExpOutMassFlow	mPortOutMassFlowRate->pFluxUnit	output flow compressed by the compressor, can be different from input flow if losses are considered \
State	mExpState	mPortUsedPower->pFluxUnit	ON / OFF state of the compressor \
Pressure_out	mExpPOut	mPortOutMassFlowRate->pPotentialUnit	Pressure at the exit of the compressor \
Steam	mExpSteam	mPortInMassFlowRate->pFluxUnit	quantity of steam input in the compressor\
TemperatureIn	mExpTIn	degC	Temperature before compression \

Model variables of Compressor

Table. 16 Compressor variables table

Variable name	dimension	Associated Expr	size	varMin	varMax	varType
mUsedPower	1	mExpUsedPower	mHorizon	0.f	abs(mMaxPower)	double
mMassFlow	1		mHorizon	0.f	abs(mMaxFlow)	double
mPOut	1		mHorizon	0.f	abs(10000)	double
mSteam	1		mHorizon	0.f	abs(10000)	double
mVarTOutlet	0			0.f		double
mTIn	1		mHorizon	0.f	abs(10000)	double
mMassFlowOut	1	mExpOutMassFlow	mHorizon	0.f	abs(mMaxFlow)	double