When there is excess heat from the CHP system the model doesn't distinguish between incurring round-trip efficiency losses and sending heat to waste, leading to cases in which TES simultaneously charges and discharges heat.
Here’s an example, where you can see it on June 1-2 from the initial view of the heating thermal dispatch:
https://reopt.nrel.gov/tool/results/2b0ac5d1-22be-4e2c-9e5c-63b6b5b044aa
When waste heat is permissible, this reporting can likely be avoided in postprocessing. Ordering the dispatch, whether by an epsilon-level incentive for waste heat or forcing it via binaries, is likely a secondary option to avoid having to tune a new parameter or add computational complexity, respectively.
When there is excess heat from the CHP system the model doesn't distinguish between incurring round-trip efficiency losses and sending heat to waste, leading to cases in which TES simultaneously charges and discharges heat.
Here’s an example, where you can see it on June 1-2 from the initial view of the heating thermal dispatch:
https://reopt.nrel.gov/tool/results/2b0ac5d1-22be-4e2c-9e5c-63b6b5b044aa
When waste heat is permissible, this reporting can likely be avoided in postprocessing. Ordering the dispatch, whether by an epsilon-level incentive for waste heat or forcing it via binaries, is likely a secondary option to avoid having to tune a new parameter or add computational complexity, respectively.