EngCoolProp Functions

class engcoolprop.ec_fluid.EC_Fluid(symbol='N2', T=530.0, P=1000.0, child=1)

Qdescription()

CoolProp Q values areDifferent from RefProp:

#:c == RefProp ==
#:c        q--vapor quality on a MOLAR basis [moles vapor/total moles]
#:c           q < 0 indicates subcooled (compressed) liquid
#:c           q = 0 indicates saturated liquid
#:c           q = 1 indicates saturated vapor
#:c           q > 1 indicates superheated vapor
#:c           q = -998 subcooled liquid, but quality not defined (p > Pc)
#:c           q = 999 indicates supercritical state (t > Tc) and (p > Pc)
#:
#:c == CoolProp ==
#:c        q--vapor quality on a MASS basis [mass vapor/total mass]
#:c           q  indicates subcooled (compressed) liquid
#:c           q  indicates saturated liquid
#:c           q  indicates saturated vapor
#:c           q < 0 indicates superheated vapor OR (p > Pc)
#:c           q  subcooled liquid, but quality not defined (p > Pc)
#:c           q  indicates supercritical state (t > Tc) and (p > Pc)
#:
#:Phase String            Phase Region
#:liquid                  p < pcrit & T < Tcrit ; above saturation
#:gas                     p < pcrit & T < Tcrit ; below saturation
#:twophase                p < pcrit & T < Tcrit ; mixed liquid/gas
#:
#:supercritical_liquid    p > pcrit & T < Tcrit
#:supercritical_gas       p < pcrit & T > Tcrit
#:supercritical           p > pcrit & T > Tcrit        

compressibility()

returns Z

constH_newP(P=1000.0)

Calc properties at new P with same H

constP_newH(H)

Calc properties at new H with same P

constS_newP(P=1000.0)

Calc properties at new P with same S

dH_FromHref()

Calculate Enthalpy difference from self.Href

dHvap(P=None)

calculate heat of vaporization at input P or self.P (BTU/lbm)

gamma()

calculate ratio of specific heats from Cp and Cv

getSatP(T=None)

Get Psat for Liquid at input T or self.T

getSatPandDens(T=None)

Get Psat and rho for both Liquid & Gas at input T or self.T

getSatT(P=None)

Get Tsat for Liquid at input P or self.P

getSatTandDens(P=None)

Get Tsat and Density for both Liquid & Gas at input P or self.P

getStrTPD()

create a string from the TPDEHS properties

getStrTPDphase()

create a string from the TPDEHS properties

getStrTransport()

create a string from the Transport properties

html_desc()

html output a multiline property summary with units

initFromObj(obj)

initialize properties from another n_fluid object

newDE(D=0.1, E=50.0)

Calc properties at new D and E

printCriticalProps()

print a multiline property summary with units

printProps()

print a multiline property summary with units

printTPD()

print a string from the TPDEHS properties

restoreFromDup()

restore properties from duplicate n_fluid

saveToDup()

save properties to duplicate n_fluid

setPD(P=1000.0, D=0.01)

Calc props from P and D

setPH(P, H)

Calc properties at P and H

setProps(**inpD)

Generic call using any two of supported inputs T,P,D,Q,S,H,E:

#: for example
#: ec.setProps(T=100, D=0.1)
#: ec.setProps(D=0.1, T=100)
#: ec.setProps(P=100, H=20)

setPropsFromAS()

Assume that self.AS (AbstractState) has been set elsewhere.

setTD(T=530.0, D=0.01)

Calc P from T and D

setTP(T=530.0, P=1000.0)

Calc props from T and P

surfTen()

calculate surface tension, lbf / inch