PyPSA / PyPSA/technology-data

Harmonise efficiencies for biomass combustion

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Description

@toniseibold:

For medium temperature heat the biomass route has an efficiency=costs.at["direct firing solid fuels", "efficiency"] which equals 1. The low temperature heat biomass route has an efficiency=costs.at["solid biomass boiler steam", "efficiency"] which equals 0.89. This would mean that biomass to low temperature heat is less efficient than biomass to medium temperature heat.

This stems from DEA technology data and appears to be inconsistent in this case. There is an option for a condensing steam boiler, but that would not apply to the bulk of steam usage which is at higher temperatures. Other data could possibly be found from a UFZ/DBFZ database on biomass applications.

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Research direction

Start by locating the technology-data entries for “direct firing solid fuels” and “solid biomass boiler steam” and compare their efficiency assumptions. Review the linked UFZ/DBFZ database as a possible source, then reconcile the biomass heat efficiencies with a documented, defensible data choice.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
data
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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