deflex.allocate_fuel¶

deflex.allocate_fuel(method, eta_e, eta_th, **kwargs)[source]¶

Allocate the fuel input of chp plants to the two output flows: heat and electricity.

Use allocate_fuel_deflex() if you want to use the default values of the config file or if you want to define your own default values.

The following methods are available:

Alternative Generation or Finnish method -> finnish_method()

Exergy method or Carnot method -> exergy_method()

IEA method -> iea_method()

Efficiency method -> efficiency_method()

The sum of the allocation factors of both flows is always one: $\alpha_{th} + \alpha_{el} = 1$

The fuel factor is the allocation factor devided by the efficiency:

$f_{fuel, el}=\frac{\alpha_{el}}{\eta_{el}}\qquad f_{fuel, th}=\frac{\alpha_{th}}{\eta_{th}}$

$f_{fuel, el/th}$ :Fuel factor of the electricity/heat flow

$\alpha_{el/th}$ : Allocation factor of the electricity/heat flow

$\eta_{el/th}$ : Efficiency of the electricity/heat output in the chp plant

Other Parameters:
Parameters:	method (str) – The method to allocate the output flows of chp plants: alternative_generation, carnot, efficiency, electricity, exergy, finnish, heat, iea eta_e (numeric) – The efficiency of the electricity production in the chp plant. Mandatory for all functions. eta_th (numeric) – The efficiency of the heat output in the chp plant.Mandatory for all functions.
	eta_c (numeric) – The Carnot factor of the heating system. Mandatory in the following functions: exergy eta_e_ref (numeric) – The efficiency of the best power plant available on the market and economically viable in the year of construction of the CHP plant. Mandatory in the following functions: alternative_generation eta_th_ref (numeric) – The efficiency of the best heat plant available on the market and economically viable in the year of construction of the CHP plant. Mandatory in the following functions: alternative_generation
Returns:	The fuel factors of the output flows (heat/electricity)
Return type:	namedtuple

Examples

>>> a = allocate_fuel("efficiency", eta_e=0.3, eta_th=0.5)
>>> round(a.electricity, 2)
2.08
>>> round(a.heat, 2)
0.75
>>> a = allocate_fuel("electricity", eta_e=0.3, eta_th=0.5)
>>> round(a.electricity, 2)
3.33
>>> a.heat
0.0
>>> a = allocate_fuel("exergy", eta_e=0.3, eta_th=0.5, eta_c=0.555)
>>> round(a.electricity, 2)
1.73
>>> round(a.heat, 2)
0.96
>>> a = allocate_fuel("finnish", eta_e=0.3, eta_th=0.5, eta_e_ref=0.5,
...                   eta_th_ref=0.9)
>>> round(a.electricity, 2)
1.73
>>> round(a.heat, 2)
0.96
>>> a = allocate_fuel("heat", eta_e=0.3, eta_th=0.5)
>>> a.electricity
0.0
>>> a.heat
2.0
>>> a = allocate_fuel("iea", eta_e=0.3, eta_th=0.5)
>>> round(a.electricity, 2)
1.25
>>> round(a.heat, 2)
1.25