feat:electrolyser excess heat boosting

[amos-schledorn]

This PR introduces boosting for electrolyser excess heat, defaulting to 70C.

Changes proposed in this Pull Request

• Replace config:sector:use_electrolysis_waste_heat:0.25 with config:limited_heat_sources:electrolysis_waste_heat and related entries in config:direct_utilisation_heat_sources and config:heat_pump_sources.
• Introduce an electrolysis waste heat bus and reroute the electrolysis process accordingly.
• Introduce config:limited_heat_sources:requires_generator (true for geothermal, false for electrolysis excess heat)
• Use excess-heat heat pump for electrolysis waste heat in heat_system.heat_pump_costs_name
• Update build_sector accordingly

Checklist

• I tested my contribution locally and it works as intended.
• Code and workflow changes are sufficiently documented.
• Changed dependencies are added to envs/environment.yaml.
• Changes in configuration options are added in config/config.default.yaml.
• Changes in configuration options are documented in doc/configtables/*.csv.
• Sources of newly added data are documented in doc/data_sources.rst.
• A release note doc/release_notes.rst is added.

Testing

Config

foresight: overnight

scenario:
  clusters:
  - 5
  planning_horizons:
  - 2030

clustering:
  temporal:
    resolution_sector: 25h

countries: ['DE', 'DK']

sector:
  district_heating:
    limited_heat_sources:
      electrolysis excess:
        constant_temperature_celsius: 70
        ignore_missing_regions: false
        requires_generator: false
  heat_pump_sources:
    urban central:
    - electrolysis excess

Results

Heat mix