12.11.2018
Heat Dispatch Centre – Symbiosis of renewable generation units for sustainable thermal energy supplyBritta Kleinertz, Dr. Götz Brühl, Theresa Faber
Research supported by BAFA fund „4th generation district heating“
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Motivation for series-connection of renewable heat sources
Concept of Heat-Dispatch-Centre
Case study for implementation
Discussion and Outlook
Content
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Heat generation cost
Temperature level
Limitations of renewable heat sources
Interconnection of renewable heat sources by temperature level
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Interconnection of different heat sources in series as an essential characteristic of the Heat-Dispatch-Centre
Market
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Case Study for the Heat-Dispatch-Centre including available heat sources in the investigated area
ca. 3.4 GWh
ca. 0.8 GWh
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Analysis of heat load profile – Heat demand
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10
20
30
40
50
Dai
ly h
eat
de
man
d/
Po
ssib
le h
eat
su
pp
ly in
MW
h
Date
Heat demand above 60 °C
©FfE SWRo-03#P Waermenetze 4.0_eV&mbH_00044
Overall heat demand
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Analysis of heat load profile – Heat demand by temperature level
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10
20
30
40
50
Dai
ly h
eat
de
man
d/
Po
ssib
le h
eat
su
pp
ly in
MW
h
Date
Heat demand above 60 °C Heat demand up to 60 °C
©FfE SWRo-03#P Waermenetze 4.0_eV&mbH_00044
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Analysis of heat load profile and supply – Heat demand by temperature level and possible heat generation units
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10
20
30
40
50
Dai
ly h
eat
de
man
d/
Po
ssib
le h
eat
su
pp
ly in
MW
h
Date
Heat demand above 60 °C Heat demand up to 60 °C
Heat pump + Gasifier with CHP Heat pump
©FfE SWRo-03#P Waermenetze 4.0_eV&mbH_00044
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Techno-ecological boundary conditions and results for heat supply of the investigated area
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0,5
1
1,5
2
Primary Energy Factor
Pri
mar
y En
ergy
fa
cto
r fo
r h
eat
sup
ply
29%
29%
42%
Achieved heat supply composition with Heat-Dispatch-Centre
Heat pump
Gasification +CHP
Primary Grid
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50
100
150
200
250
300
350
Specific CO2-Emissions
Spec
ific
CO
2
emis
sio
ns
in
g CO
2/k
Wh
Requirements for heat supply:50 % of generation has to come from renewables, max. 50 % of this from biomass
Natural Gas
Heat-Dispatch-Center
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Electricity overproduction from CHP is sold as green electricity at 5 €ct/kWhel
Funding according to BAFA fund „District heating 4.0“ is 20 % on all investments
Economic boundary conditions and results
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100.000
200.000
300.000
400.000
500.000
600.000
without funding with funding
Year
ly c
ost
in E
uro
Cost breakdown
yearly variable costs yearly maintenance
annual investmant
Specific heat generation cost excluding uncertainty margin
– 11,0 €ct/kWhtherm including fixed income
– 12,0 €ct/kWhtherm excluding fixed income
Cost Benchmark:
– „District heating 4.0“ is 12 €ct/kWh
– District heating in Rosenheim is about 7 €ct/kWh
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Conclusion and Outlook
Future heat supply will rely on a composition of different heat sources
Heat generation units should be combined in temperature cascades
Unit control is key as frequent adaptations are required
Higher costs for invest, maintenance and operating material render system uneconomical, further income e.g. from electricity trading/load reserve required
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To increase flexibility of Heat-Dispatch-Centre further investigation of the hydraulic connection, load control and storage limitations are needed
Forschungsgesellschaft für Energiewirtschaft mbH
Am Blütenanger 17 80995 München
12.11.2018
www.ffegmbh.deContact
Britta Kleinertz
089 – 158 121 39
Project information: www.ffegmbh.de/waermenetze
