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Dynamic Uncertainty Analysis of the Building Energy Performance in City Districts 4ème université de la Chaire éco-conception PERFORMANCE DES OUTILS D’ECO-CONCEPTION Sebastian Stinner

E.ON Energy Research Center  June 2006: the largest research

co-operation in Europe between a private company and a university was signed  Five new professorships in the

field of energy technology were defined across 4 faculties  Main Research Areas:  Grids and Storage  Buildings and City Districts  Heat and Power Generation

Dynamic Uncertainty Analysis of the Building Energy Performance in City Districts | Sebastian Stinner Slide 2

Research Foci EBC

E.ON Energy Research Center Energy Concepts for Buildings and Communities Room Air Flows, Thermal Comfort and Indoor Air Quality

Heating and Air-conditioning components

Generation and Storage Systems

Energy Efficient Cities

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Wind power in MW

Future Power Generation – „Energiewende“

hours

Wind power max. 20.000 MW, min. 270 MW Source: Erneuerbare Energien 2010. Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU), 2010 / DENA – presentation at the energy operators meeting 2010 in Heiligendamm Dynamic Uncertainty Analysis of the Building Energy Performance in City Districts | Sebastian Stinner Slide 4

Energy Storage Systems in Germany

Gas Grid and Gas Storage (200 TWh)

High Voltage

Medium Voltage

Pump Storage – 40 GWh

Low Voltage

Batteries

Buildings (DSM)

E – Mobility (5 kWh / Vehicle)

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Energy Demand in Germany

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Why are we interested in City Districts?

70 %

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What did we analyze? Weather conditions (hot, medium, cold)

Indoor air temperature Air exchange rate Inner loads

Dynamics Thickness of insulation Material properties

100

Nr. of buildings in class Refurbishment status

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100

Basics – Quasi Monte Carlo (QMC) Method Classical Monte Carlo Estimate Uncertainties in Parameters

Draw Random Numbers

Do a High Number of Simulations

Get Uncertainty in Target Figure Air exchange rate in 1/h

Estimate Uncertainties in Parameters

Sampling Algorithm

Quasi Monte Carlo Dynamic Uncertainty Analysis of the Building Energy Performance in City Districts | Sebastian Stinner Slide 9

Do a Low Number of Simulations

Challenge – Total Annual Heat Demand

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Challenge – Dynamic Heat Demand („Summer“ Day)

Quartiles Quartiles

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Median of Dynamic Heat Demand

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RIQR of Dynamic Heat Demand

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Influence of Heat Demand on RIQR

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Integration of HVAC technologies

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Offering flexibility to the electrical grid

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Median of Flexibility

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IQR of Flexibility

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Conclusions & Further Work

Conclusion     

Extension of global uncertainty analysis to city district level Dynamic uncertainty analysis Decreasing relative uncertainty with higher heat demand Uncertainties do not disappear due to the analysis of city districts Quantification of uncertainties in flexibility important for future integration of renewables

Further Work    

Statistical tests Influence of composition of district Integrate City District and Flexibility applications Influence on available storage capacity

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We gratefully acknowledge the financial support for this project by BMWi (German Federal Ministry for Economic Affairs and Energy) under promotional Dynamic Uncertainty Analysis of the Building Energy Performance in City Districts | Sebastian Stinner reference 03ET1111B. Slide 20

Application to Every Type of Distribution

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