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@ -36,7 +36,8 @@ Also unlike PyPSA-Eur, PyPSA-Eur-Sec subtracts existing electrified heating from
The remaining electricity demand for households and services is distributed inside each country proportional to GDP and population.
# Heat demand
Heat demand
===========
Building heating in residential and services sectors is resolved regionally, both for individual buildings and district heating systems, which include different supply options [To do:link to next section]
Annual heat demands per country are retrieved from `JRC-IDEES <https://op.europa.eu/en/publication-detail/-/publication/989282db-ad65-11e7-837e-01aa75ed71a1/language-en>`_ and split into space and water heating. For space heating, the annual demands are converted to daily values based on the population-weighted Heating Degree Day (HDD) using the `atlite tool <https://github.com/PyPSA/atlite>`_, where space heat demand is proportional to the difference between the daily average ambient temperature (read from `ERA5 <https://doi.org/10.1002/qj.3803>`_) and a threshold temperature above which space heat demand is zero. A threshold temperature of 15 °C is assumed by default. The daily space heat demand is distributed to the hours of the day following heat demand profiles from `BDEW <https://github.com/oemof/demandlib>`_. These differ for weekdays and weekends/holidays and between residential and services demand.
@ -406,4 +407,4 @@ plants, and directly from the air (DAC).
Carbon dioxide can be used as an input for methanation and
Fischer-Tropsch fuels, or it can be sequestered underground.
[Heat demand](#heat-demand)
test <a href="doc/supply_demand.rst#L397">