deflex.exergy_method¶

deflex.exergy_method(eta_e, eta_th, eta_c)[source]¶

Exergy Method or Carnot Method- a method to allocate the fuel input of chp plants to the two output flows: heat and electricity

The allocation factor $\alpha_{el}$ of the electricity output is calculated as follows:

$\alpha_{el}=\frac{\eta_{el}}{\eta_{el}+\eta_{c}\cdot\eta_{th}}$

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

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

$\eta_{th}$ : Efficiency of the thermal output in the chp plant

$\eta_{c}$ : Carnot factor of the thermal energy

Parameters:	eta_e (numeric) – The efficiency of the electricity production in the chp plant. Mandatory in the following functions: alternative_generation, exergy, iea, efficiency eta_th (numeric) – The efficiency of the heat output in the chp plant. Mandatory in the following functions: alternative_generation, exergy, iea, efficiency eta_c (numeric) – The Carnot factor of the heating system. Mandatory in the following functions: exergy
Returns:	Allocation factor for the electricity flow
Return type:	numeric

Examples

>>> round(exergy_method(0.3, 0.5, 0.3), 3)
0.667