When merging two scenarios: unexpected slider settings

[AlexanderWirtz]

I merged two scenarios with equal weight: 741570 and 741572 on the beta server.

This seems to work like a charm except for this slider:

households_water_heater_district_heating_steam_hot_water_share

This resulted in a non-zero slider setting even though both of its parent scenarios have this slider set tot 0.0

[AlexanderWirtz]

Re-assign as you see fit

[ChaelKruip]

I assigned @antw as he knows best how merging of scenario's is done

[antw]

I've tried this locally and on beta, and in both cases the resulting district heating share is 0.0. Are you sure those two scenario IDs are the ones you meant?

merged = ScenarioMerger.call([
  [Scenario.find(741570), 1.0],
  [Scenario.find(741572), 1.0]
])

merged.user_values['households_water_heater_district_heating_steam_hot_water_share']
# => 0.0

[AlexanderWirtz]

I have not been able to reproduce it directly either, but I do have an idea what may have caused this:

The merged scenario's sliders for hot water do not add up to 100%, but to 95.1%:

If you save this scenario and then load it, normally that scenario will re-set the Condensing combi boiler slider to make it add up to 100%. In the scenario I created by merging and then saving (741575) both this slider and the District heating slider have changed. No clue why that happened, but pretty sure it will not happen anymore once we fix the issue causing the sliders to not add up to 100% in the first place.

[antw]

No clue why that happened, but pretty sure it will not happen anymore once we fix the issue causing the sliders to not add up to 100% in the first place.

The first scenario (741570) does not have any values for the hot water sliders, so the defaults are used. The second scenario (741572) does have values and they sum to 90%, which is why the merged scenario – weighting the two starting scenarios equally – ends up with the sliders summing to 95%.

Here are the values for the second scenario:

Input	Value
households_water_heater_combined_network_gas_share	54.0
households_water_heater_district_heating_steam_hot_water_share	0.0
households_water_heater_heatpump_air_water_electricity_share	15.0
households_water_heater_heatpump_ground_water_electricity_share	5.0
households_water_heater_hybrid_heatpump_air_water_electricity_share	4.0
households_water_heater_micro_chp_network_gas_share	2.0
households_water_heater_network_gas_share	5.0
households_water_heater_resistive_electricity_share	3.0
households_water_heater_wood_pellets_share	2.0
Total	90.0

[AlexanderWirtz]

The first scenario (741570) does not have any values for the hot water sliders, so the defaults are used. The second scenario (741572) does have values and they sum to 90%, which is why the merged scenario – weighting the two starting scenarios equally – ends up with the sliders summing to 95%.

I suppose I should have checked that. Not the only thing I discovered was wrong with that scenario, after all...

Thanks, Anthony!