Simplified heat sliders buildings

[jort-wolda]

Context

This PR simplifies the input sliders for the buildings.

Implemented changes

• Changed the new buildings input slider
• Removed the existing buildings input slider and replaced by demolished buildings
• Changed the insulation sliders for buildings to be a reduction in % instead of the typical heat demand in kWh/m2
• Added queries for a new figure, in which the number of buildings is shown alongside the housing stock

Related

Goes with pull requests:

• ...

Checklist

• I have tested these changes
• I have updated documentation as needed
• I have tagged the relevant people for review

[mabijkerk]

It is good practice to use 100.0 in calculations like these. I think this ensures the engine will read it as a float instead of an integer.

[mabijkerk]

If I leave the number of existing buildings as is and add the same amount of new buildings, I would expect both demands to be the same. Why is this not the case? Am I missing something? For a blank nl2023 scenario I set the new buildings slider to the max:

Update: so this is because we the existing buildings come from the energy balance, while we use the following for the future buildings?

    insulation_value_new_buildings = AREA(typical_useful_demand_for_space_heating_buildings_future);
    typical_surface_area_per_unit = AREA(area_per_building_residence_equivalent);
    heat_demand_per_unit = insulation_value_new_buildings * typical_surface_area_per_unit * MJ_PER_KWH;

Didn't we want to make the new buildings have the same heat demand per building as the existing buildings?

Conclusion: we will address this in the next increment, together with the insulation costs.

[mabijkerk]

How does this relate to the flexibility_outdoor_temperature input that also sets the buildings heat demand with a factor and priority 0?

          UPDATE_WITH_FACTOR(V(buildings_useful_demand_for_space_heating_buildings_present), preset_demand, heat_factor),
          UPDATE_WITH_FACTOR(V(buildings_useful_demand_for_space_heating_buildings_future), preset_demand, heat_factor),
          UPDATE_WITH_FACTOR(V(buildings_useful_demand_cooling), preset_demand, cool_factor),
          UPDATE_WITH_FACTOR(V(agriculture_useful_demand_useable_heat), preset_demand, heat_factor)
        )
      },
      -> {},
    )
- priority = 0

[mabijkerk]

The other development of demand sliders are set with a percentage per year change. What do we think is appropriate @kndehaan?

[mabijkerk]

We want to keep it as a %, but to separate it clearly from the other sliders it should have its own group header.

[mabijkerk]

Done, with the review. All in all nice work! There are some points of discussion left. To final points:

• I didn't review the insulation costs, might be good to do this if/after we have revised it.
• It is still good to have a stress test: there are so many different factors that influence each other here. Perhaps with MT?