development of strategies for an enhanced use of renewable energies for heating and cooling of...
TRANSCRIPT
Development of strategies for an enhanced use of renewable energies for
heating and cooling of buildings
- Comparison and optimization of energy supply systems through exergy analysis -
Herena Torio
• The building sector represents ca. 40% of the final energy consumption in Germany
Enhanced use of renewable energies in the energy supply of buildings
- Which requirements have to fulfill the buildings to allow a wider use of renewable energies?
- How can the renewable energy systems be optimized for that specific use?
MOTIVATION
?
?
METHOD
2. Building typology
USE
- Office building
- Resid. building
- Emission system
- Building shell
Definition “Standard- building”
1. Evaluation Criteria based on EXERGY flows
4. Dynamic Analysis (IDA-ICE and TRNSYS?)
5. Evaluation: Best use and chances for optimization
HEATING AND COOLING
Local Solar networks with/out seasonal storage
Big solar thermal systems
Geothermal energy systems
3. Building systems
FINAL RESULTS
1. GUIDELINE FOR OPTIMAL USE OF THE TECHNOLOGIES
- STRATEGIES for enhanced use of renewable energies and reduction of CO2-emissions
-> by optimizing the use of the exergy flows
- Feasibility: optimal cost-benefit behaviour
2. SIMPLE CALCULATION TOOL (i.e. Excel-based)
Example Formular aus IEA Annex 37
Example of Tool from IEA ECBCS Annex 37
THANK YOU FOR YOUR ATTENTION!!!
• MODULAR APPROACH: Building and building systems divided into “Subsystems”
• For each subsystem -> ENERGY- und EXERGY demands and losses will be calculated
Source: IEA Annex 37
METHOD
METHOD - ExamplesEnergy
Exergy
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1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00Components
En
erg
y /
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erg
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Wh
/h)
Gen
erat
ion
Em
issi
on
En
velo
pe
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trib
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rag
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m. E
ner
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tran
sfo
rm
Ro
om
Air0
1000
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1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00Components
En
erg
y /
Ex
erg
y (
Wh
/h)
Gen
erat
ion
Em
issi
on
En
velo
pe
Dis
trib
uti
on
Sto
rag
e
Pri
m. E
ner
gy
tran
sfo
rm
Ro
om
Air
Cond. boiler
100% PV
100% PV + GSHP
100% solar thermal
Cond. boiler
100% PV
100% PV + GSHP
100% solar thermal