Improvements for TESPy

[fwitte]

If you have ideas for possible improvements feel free to post them here.

Components

• add design/offdesign-switch for connections (for now, available for components only), done: 7eb61fa.
• improve design/offdesign-switch for components, done: 093d560.
• add custom variables to your calculation (e. g. calculate a pipes diameter at a given pressure drop, mass flow rate and pipe length), done: 977a5be.
• add motoric chp component, done: 79a1177.
• add electrolysis, fuel cell, methanisation reactor.
• add solar thermal components, done: b5990e1.
• improve architecture for grouped parameters, done: 83c9ff4.

Heat Exchanger

• add the partial derivatives for specified logarithmic temperature difference (if required).
• add direct current or cross current heat exchangers.

Combustion Chamber

• add example code/tutorial, done: 8c0034d.
• add support for stoichmetric combustion chamber, done: 5ce60aa.

Turbine

• add documentation on how to handle different types of turbines/turbine stages.

Fluid Properties

• add support for different fluid property databases/calculation methods.
• add liquid mixtures.

Other

• add network export and network reader (from/to .csv/.xlsx), done: 70ae908.
• improve fluid initialisation for component drum.
• improved calculation speed by using CoolProp tabular interpolation feature, modules/packages
  • CoolProp.abstract_state
  • dill/pickle
• make network export and network reader handle compressor maps
• make components work with negative or zero mass flow

[jakob-wo]

Hi Francesco,
as I mentioned at the recent oemof dev meeting I am interested in using TESPy for modeling an Absorbtion Heat Pump (AHP) running with LiBr/H2O.
In a former project we used CoolProp to check balances at the single components of an AHP and found that the enthalpy of the media (mixture of LiBr and Water) does not (yet) include the enthalpie of mixing and therefore might be unsuitable for modeling the process (for further information see: https://groups.google.com/forum/#!topic/coolprop-users/n1vzHEKnV58).
Do you know any alternative to CoolProp that could provide media properties including the mixing enthalpy?

[fwitte]

Hi Jakob,
thanks for your input, I am very sorry for my late reply! I have not looked into details, maybe it is possible to add this functionality in CoolProp? If I find some spare time, I will try to look into that issue.
At the moment, TESPy handles ideal mixtures of gases only, thus there are no mixing effects on enthalpy. I would appreciate, if mixtures of liquids are available in the future, too. Maybe you can contribute, if you find new information!