As of: March 7, 2024, 6:02 p.m
By: Elke Robert
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The waste heat from the Altenstadt thermal power plant could be used in the future, it was said when the energy utilization plan was presented in Schongau.
© Hans-Helmut Herold
An initial overview of the city's energy usage plan is now available.
The goal: to put Schongau on the path to 100 percent renewable energy.
Even analyzing the current situation brings surprises.
Schongau - In February 2020 it was decided to draw up an energy usage plan; experts from the Oberland Energy Transition (EWO) had worked intensively on it over the past year - the master of the numbers, as Andreas Scharli presented to his colleague Ludwig Hagelstein, now gave a brief outline to the city council the results.
For this purpose, the current state was first examined, based on the figures from 2021: “Electricity and heat don’t have much of a difference,” says Hagelstein, the energy consumption for heat is 49 percent and for electricity it is 45.2 percent.
The total energy consumption per year amounts to a gigantic sum of 1,858 gigawatt hours (GWh), 90 percent of which is consumed by industry.
Goal of the city of Schongau: “Cover local consumption through renewable energies”
If you look at the numbers without the large electricity-intensive industrial companies, there are still 434,482 megawatt hours (MWh), of which 54.6 percent are attributable to business, 24.9 percent to transport and 18.1 percent to private households.
2.4 percent of this energy is needed for municipal properties.
Electricity consumption is 842,160 MWh.
21.7 percent of this is already generated using renewable energies.
“The aim would be to cover all local consumption using renewable energies,” said the energy expert.
The study of the generation of electricity via photovoltaic systems (PV) on the roof shows particularly great potential.
Almost 90 percent of the area is unused; a total of 56,632 MWh could be generated, according to the example calculation.
A lot is already being implemented with the open-space facilities.
“But here too there are still areas that come into question,” says the EWO employee.
Primary schools used a particularly large amount of energy in 2022
37.5 percent natural gas and 27 percent crude oil are used to generate heat.
Only 7.6 percent is covered by locally generated energy.
The total demand for heat in 2021 was more than 900,000 MWh of final energy, excluding the large consumers UPM and Hochland it was 320,000 MWh per year.
“There is a big gap between what is there and where we want to be – we have to work on that,” emphasized Hagelstein.
We also took a closer look at the municipal properties based on the consumption figures from 2021 and 2022. The primary school particularly stands out with a record consumption in 2022 of just under 130 MWh.
City architect Sebastian Dietrich explained this with the ventilation situation during Corona.
The building yard is also far away from the values where you want to go.
“We have to look at this,” was the saying at the city council meeting, especially since heating oil is still used there.
According to the EWO study, the heat requirement in the town hall is also enormous.
Lots of praise for the sewage treatment plant team: “You can see how energy efficiency works there.”
Hagelstein had something interesting to report about PV roof surfaces for municipal buildings: They had gone through hundreds of simulations and the potential was huge, even in the old town.
The systems would have a payback period of ten years.
If the Schongau water pumping stations were equipped with PV, even for just five years.
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There was huge praise from Andreas Scharlis for the wastewater treatment plant team: “We can't think of much to improve, we have a team that is after every kilowatt hour, you can see how energy efficiency works.” As part of the Schongau climate spring between April 18th and May 5th - you can take a look at the sewage treatment plant, he advertised.
The planned district heating pipeline expansion for Schongau was also briefly touched upon for the Schongau-West district: “A hot topic is the old wood in Altenstadt,” said Scharli.
A big buyer could be the Hochland company; they are being discussed.
Cooperation between city and country is required
The filter system at the thermal power plant is now under construction for the recycling of waste wood.
This will go into operation in the summer.
There is also a generational change in operators: “I think that makes things a little easier,” says the energy manager.
“I don’t want to offend anyone, but there’s music in it, there could be synergies.”
But he also admitted: “Waste wood is, by definition, waste.”
Natural gas has always been portrayed as being so clean, but now we have to approach the issue with an open mind.
It could also be possible to avoid using natural gas entirely in the future.
“The community of Altenstadt is open.”
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The goal remains to make the region independent of renewable energies by 2035.
“The question is whether we can do it, but even though I already have a lot of gray hair, I would like to support it,” said Scharli.
There must be cooperation between the city and the country.
“The path is difficult, but I would like every community to do their part.”
The city council took note of the information in the energy usage plan and commissioned the administration to develop proposals for implementation.
The local newspapers in the Weilheim-Schongau district are represented on Instagram under “merkur_wm_sog”.