Thermal Storage with Time-Dependent Loss Rate

[MOHAMMAD ALJUBRAN]

Hi everyone! I am new to PyPSA and am trying to use thermal storage (hot water tank) for dispatch. My question is, the loss rate of the hot storage tank is time-dependent as it varies based on the tank temperature. How can I incorporate time-varying loss rate based on heat transfer? 

[Fabian Neumann]

Hi,

time-varying standing losses of Stores are currently not supported in
PyPSA, but we would welcome a pull request that implements it.

https://pypsa.readthedocs.io/en/latest/components.html#store

As a guidance you could look at how the time-dependent efficiency is
implemented for the link component:

https://pypsa.readthedocs.io/en/latest/components.html#link

This would be an exogenous standing loss time series. A
temperature-dependency (dependency of energy in store) would make the
problem nonlinear, which is not supported in PyPSA, i.e. would contain

standing_loss(E) * E

Best wishes,

Fabian

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Dr.-Ing.
Fabian Neumann (he/him)
Postdoctoral Researcher

Department of Digital Transformation in Energy Systems
Institute of Energy Technology
Technische Universität Berlin

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