Fix myopic optimization for networks with geothermal district heating

[cpschau]

Changes proposed in this Pull Request

Geothermal heat for district heating was implemented in #1359. However, it was not working for the myopic code. This PR includes two changes, that fix the issue:

1. The dataframe containing the existing heating distribution was extended to include all provided district heating heat pump sources in build_existing_heating_distribution.
2. The indices of the heat pumps built in the predecessing planning horizon (relative to the planning horizon to be optimized) were adjusted for the COP correction in add_brownfield. This adjustment had to be done, because some heat pumps initialized in prepare_sector_network potentially disappear from their links_t dataframe if their efficiency equals zero (e.g. in Denmark where geothermal source temperatures can exceed district heating supply temperatures). This correction is done to account for the supply temperature dynamics in district heating and should be further adjusted as described in District heating efficiency gains applied to decentral heat pumps #1451 to depict efficiency gains for heat pumps due to technological learning.

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.

[github-actions]

Validator Report

I am the Validator. Download all artifacts here.
I'll be back and edit this comment for each new commit.

❗ Run failed!

Download 'logs' artifact to see more details.

• master passed! ✅
• fix_geothermal_myopic failed in: determine_availability_matrix, determine_availability_matrix, determine_availability_matrix, determine_availability_matrix, determine_availability_matrix, determine_availability_matrix, determine_availability_matrix, determine_availability_matrix, determine_availability_matrix

⚠️ Config changes detected!

Results may differ due to these changes:

diff --git a/config/test/config.validator.yaml b/config/test/config.validator.yaml
index 9dc7cccb..a7440dee 100644
--- a/config/test/config.validator.yaml
+++ b/config/test/config.validator.yaml
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Contributors to PyPSA-Eur <https://github.com/pypsa/pypsa-eur>
+# SPDX-FileCopyrightText: : 2017-2024 The PyPSA-Eur Authors
 #
 # SPDX-License-Identifier: CC0-1.0
 

Model Metrics

Benchmarks

Comparing fix_geothermal_myopic (078a292) with master (ec5f877).
Branch is 3 commits ahead and 15 commits behind.
Last updated on 2025-01-07 14:40:16 CET.

[amos-schledorn]

Thanks for spotting this! Just had minor comments.
Also, could you update the release notes and show a quick before/after comparison of COPs to make sure everything is working as expected? (e.g. a cooked-down version of the last plot in this PR: #1290 )

[fneum]

Good to go when @amos-schledorn and my comments addressed.

[amos-schledorn]

Hey @cpschau, sorry I didn't see this earlier: in your plot, it looks like the COP for 2030 build year HPs is a bit higher than the COP for 2020 build year HPs in 2030. But maybe I'm reading this wrong?

[cpschau]

Hey @cpschau, sorry I didn't see this earlier: in your plot, it looks like the COP for 2030 build year HPs is a bit higher than the COP for 2020 build year HPs in 2030. But maybe I'm reading this wrong?

You are reading it right. For the geothermal heat pumps there is a higher average COP, because the 2030 network comprises new urban central heat buses in Albania, Spain, Ireland, and Montenegro, as the district heating share is increasing from 0 to 0.3 (configurable). At these buses the COPs happen to be higher than the 2020 average.

[amos-schledorn]

Hey @cpschau, sorry I didn't see this earlier: in your plot, it looks like the COP for 2030 build year HPs is a bit higher than the COP for 2020 build year HPs in 2030. But maybe I'm reading this wrong?

You are reading it right. For the geothermal heat pumps there is a higher average COP, because the 2030 network comprises new urban central heat buses in Albania, Spain, Ireland, and Montenegro, as the district heating share is increasing from 0 to 0.3 (configurable). At these buses the COPs happen to be higher than the 2020 average.

Makes sense. Thanks!

[amos-schledorn]

Good to go from my side!