turbine.rst

Turbine (Isentropic)

pair: idaes.power_generation.unit_models.helm.turbine_stage;HelmIsentropicTurbine

idaes.power_generation.unit_models.helm.turbine

This is a steam power generation turbine model for the basic isentropic turbine calculations. It is the basis of the TurbineInletStage <technical_specs/model_libraries/power_generation/unit_models/turbine_inlet:Turbine (Inlet Stage)>, TurbineOutletStage <technical_specs/model_libraries/power_generation/unit_models/turbine_inlet:Turbine (Outlet Stage)>, and, TurbineOutletStage <technical_specs/model_libraries/power_generation/unit_models/turbine_inlet:Turbine (Stage)> models.

Variables

Variable	Symbol	Index Sets	Doc
efficiency_isentropic	ηisen	time	Isentropic efficiency
deltaP	ΔP	time	Pressure change (Pout − Pin) [Pa]
ratioP	Pratio	time	Ratio of discharge pressure to inlet pressure $\left(\frac{P_{out}}{P_{in}}\right)$

Expressions

This model provides two expressions that are not available in the pressure changer model.

Expression	Symbol	Index Sets	Doc
h_is	his	time	Isentropic outlet molar enthalpy [J/mol]
delta_enth_isentropic	Δhis	time	Isentropic enthalpy change (his − hin) [J/mol]
work_isentropic	wis	time	Isentropic work (W)

Constraints

In addition to the mass and energy balances provided by the control volume the following equation is used to calculate the outlet enthalpy, so work comes from the control volume energy balance.

h_out = h_in − η_is(h_in−h_is)

Initialization

To initialize the turbine model, a reasonable guess for the inlet condition and deltaP and efficiency should be set by setting the appropriate variables.

TurbineStage Class

HelmIsentropicTurbine

TurbineStageData Class

HelmIsentropicTurbineData