from oemof.eesyplan.investment import _create_invest_if_wanted
from oemof.solph import Flow
from oemof.solph.components import ExtractionTurbineCHP
[docs]
class ChpVariableRatio(ExtractionTurbineCHP):
[docs]
def __init__(
self,
name,
bus_in_fuel,
bus_out_electricity,
bus_out_heat,
efficiency_electricity_full_condensation,
efficiency_electricity_chp,
efficiency_heat_chp,
project_data,
age_installed=0,
installed_capacity=0,
capex_var=1000,
opex_fix=10,
opex_var=0,
lifetime=20,
optimize_cap=False,
maximum_capacity=float("+inf"),
):
"""
Combined Heat and Power (CHP) plant.
This class represents a combined heat and power plant that
simultaneously generates electricity and useful heat from a
single fuel source.
.. important ::
CHP systems achieve higher overall efficiency by utilising
waste heat for useful purposes.
:Structure:
*input*
1. bus_in_fuel : Gas
*output*
1. bus_out_heat : Heat
2. bus_out_electricity : Electricity
:Optimization:
The characteristic quantity of the optimization is the
*maximum electricity
power-output (active power)* of the CHP given in kW
Parameters
----------
name : str
|name|
bus_out_electricity: bus-object
|bus_out_electricity|
bus_out_heat: bus-object
|bus_out_heat|
efficiency_electricity_full_condensation : float
|efficiency_electricity_full_condensation|
efficiency_electricity_chp : float
|efficiency_electricity_chp|
efficiency_heat_chp : float
|efficiency_heat_chp|
optimize_cap : bool, default=True
|optimize_cap|
maximum_capacity : float or None, default=None
|maximum_capacity|
age_installed : int, default=0
|age_installed|
installed_capacity : float, default=0
|installed_capacity|
capex_var : float, default=1000
|capex_var|
opex_fix : float, default=10
|opex_fix|
opex_var : float, default=0,
|opex_var|
lifetime : int, default=20
|lifetime|
project_data: project_data
|project_data|
Examples
--------
>>> from oemof.eesyplan import Project
>>> from oemof.eesyplan import CarrierBus
>>> gas_bus = CarrierBus(name="gas_bus")
>>> heat_bus = CarrierBus(name="heat_bus")
>>> el_bus = CarrierBus(name="electricity_bus")
>>> my_chp_fixed = ChpVariableRatio(
... name="variable_ratio_chp",
... bus_in_fuel=gas_bus,
... bus_out_heat=heat_bus,
... bus_out_electricity=el_bus,
... installed_capacity=300,
... efficiency_electricity_full_condensation=0.3,
... efficiency_electricity_chp=0.3,
... efficiency_heat_chp=0.5,
... capex_var=1500,
... opex_fix=15,
... lifetime=20,
... optimize_cap=True,
... project_data=Project(
... name="Project_X", lifetime=20, tax=0,
... discount_factor=0.01,
... )
... )
"""
if efficiency_electricity_chp + efficiency_heat_chp >= 1.0:
raise ValueError("Total efficiency is above 100%.")
nv = _create_invest_if_wanted(
optimise_cap=optimize_cap,
capex_var=capex_var,
opex_fix=opex_fix,
lifetime=lifetime,
age_installed=age_installed,
existing_capacity=installed_capacity,
maximum_capacity=maximum_capacity,
project_data=project_data,
)
inputs = {bus_in_fuel: Flow()}
outputs = {
bus_out_electricity: Flow(
nominal_capacity=nv,
variable_costs=opex_var,
),
bus_out_heat: Flow(),
}
self.age_installed = age_installed
self.installed_capacity = installed_capacity
self.capex_var = capex_var
self.opex_fix = opex_fix
self.opex_var = opex_var
self.lifetime = lifetime
self.optimize_cap = optimize_cap
self.maximum_capacity = maximum_capacity
self.efficiency_electricity_chp = efficiency_electricity_chp
self.efficiency_heat_chp = efficiency_heat_chp
self.efficiency_electricity_full_condensation = (
efficiency_electricity_full_condensation
)
super().__init__(
label=name,
outputs=outputs,
inputs=inputs,
conversion_factors={
bus_out_electricity: efficiency_electricity_chp,
bus_out_heat: efficiency_heat_chp,
},
conversion_factor_full_condensation={
bus_out_electricity: efficiency_electricity_full_condensation
},
)