equipment.Compressor module

class equipment.Compressor(**kwargs)

Bases: equipment

Class to model a gas compressor

Parameters:

entrada: Instance of class Corriente to define the imput stream metodo: Value to specified the calculate type

0 - Output pressure and efficiency 1 - Compression ratio and efficiency 2 - Real work and efficiency 3 - Output pressure and real work 4 - Compression ratio and real work 5 - Calculate flow ot stream to compress known output pressure,

work and efficiency

6 - Compressor curve (unimplemented)

termodicnamica: Index with the thermodynamic model

0 - Adiabatic 1 - Polytropic 2 - Isothermic

Pout: Output pressure razon: Compression ratio rendimeinto: Compressor efficiency etapas: Compressor etapas trabajo: Compressor work

Coste

f_install: instalation factor base: Base index actual: Current index compresor: Compressor type

0 - Centrifugal compressor 1 - Reciprocating compressor 2 - Screw compressor

transmision: Transmission type

0 - Belt drive coupling 1 - Chain drive coupling 2 - Variable speed drive coupling

motor: Motor type

0 - Open drip-proof 1 - Totally enclosed, fan-cooled 2 - Explosion-proof

rpm

0 - 3600 rpm 1 - 1800 rpm 2 - 1200 rpm

>>> from lib.corriente import Corriente
>>> corriente=Corriente(T=400, P=101325, caudalMasico=0.1,                             fraccionMasica=[1., 0, 0, 0])
>>> compresor=Compressor(entrada=corriente, metodo=1, termodinamica=0,                              razon=3, rendimiento=0.75, etapas=1)
>>> print(compresor.power.kW)
31.1007420914
>>> compresor(compresor=2, transmision=1, motor=0, rpm=1)
>>> print(compresor.C_inst)
60464.196881

Attributes:

isCalculable

Each child class must define if its calculable for input kwargs

Methods

calculo()	Procedure to calcute equipment, defined in child class
propTxt()	txt equivalent to output properties of equipment
propertiesEquipment()	procedure to define output values in a list with format: (Name, kwargs name, units), if kwargs name if a combobox element the index isn't useful so use a tuple (Txt_Values kwargs_name)
readStatefromJSON(state)	Load instance parameter from saved file
writeStatetoJSON(state)	Write instance parameter to file

coste

title = 'Compressor'

help = ''

kwargs = {'Base_index': 0.0, 'Current_index': 0.0, 'Pout': 0.0, 'compresor': 0, 'entrada': None, 'etapas': 0, 'f_install': 1.3, 'metodo': 0, 'motor': 0, 'razon': 0.0, 'rendimiento': 0.0, 'rpm': 0, 'termodinamica': 0, 'trabajo': 0.0, 'transmision': 0}

kwargsInput = ('entrada',)

kwargsValue = ('Pout', 'razon', 'rendimiento', 'etapas', 'trabajo')

kwargsList = ('metodo', 'termodinamica', 'compresor', 'transmision', 'motor', 'rpm')

calculateValue = ('power', 'cp_cv', 'razonCalculada', 'rendimientoCalculado')

calculateCostos = ('C_comp', 'C_motor', 'C_trans', 'C_adq', 'C_inst')

indiceCostos = 7

TEXT_METODO = ['Specify out pressure and efficiency', 'Specify actual power and efficiency', 'Specify out pressure and actual power', 'Specify pressure ratio and actual power', 'Calculate input flowrate']

TEXT_TERMODINAMICA = ['Adiabatic', 'Polytropic', 'Isothermic']

TEXT_COMPRESOR = ['Centrifugal compressor', 'Reciprocating compressor', 'Screw compressor']

TEXT_TRANSMISION = ['Belt drive coupling', 'Chain drive coupling', 'Variable speed drive coupling']

TEXT_MOTOR = ['Open drip-proof', 'Totally enclosed, fan-cooled', 'Explosion-proof']

TEXT_RPM = ['3600 RPM', '1800 RPM', '1200 RPM']

property isCalculable

Each child class must define if its calculable for input kwargs

calculo()

Procedure to calcute equipment, defined in child class

__Wideal(Pout)

Calculate the ideal work

__Tout(Wid)

Calculate the output temperature

coste()

propTxt()

txt equivalent to output properties of equipment

classmethod propertiesEquipment()

procedure to define output values in a list with format: (Name, kwargs name, units), if kwargs name if a combobox element the index isn’t useful so use a tuple (Txt_Values kwargs_name)

writeStatetoJSON(state)

Write instance parameter to file

readStatefromJSON(state)

Load instance parameter from saved file