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Status of Test and Demo Buildings used by ennovatis for Linking EPDB and Continuous Commissioning

presentation at the 3rd BuildingEQ expert meeting

byUte Jahn, Dan Hildebrandt, Roland Kopetzky,

Frauke Schönfeld and Fritz Schmidt

ennovatis GmbH Germany Kornwestheim, December 2007

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Contend

1. Status of the Projects Test building – ennovatis office building Demo building 1 University of Stuttgart Demo building 2 Hospital in Hagenow

2. Conclusions for Work Package 6: Continuous assessment of Performance

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Test: ennovatis office building Großpösna

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Energy Certificates

The German Implementation of the EPBD allows presently for two kinds of energy certificates. Demand driven energy certificate Consumption driven energy certificate

The consumption driven energy certificate is the basis to compare the building behaviour against benchmarks. This will allow a Level 1 auditing.

The demand driven energy certificate is the basis of the understanding of the building, its HVAC systems and their operation and utilisation. It is the basis of Level 2 and Level 3 audits and allows to introduce rule based and model based energy management

Comparing the demand of the end energy gas (144,9 kWh/m2*a) with the temperature corrected consumption (119 kWh/m2*a) and considering incertainties due to climatic conditions and the limited occupancy during build up of ennovatis is quite good. 

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First preliminary conclusions

We can use the EPBD geometry model to calculate both energy demand and energy consumption

We can derive from measured consumption data (water and electricity) valuable information to determine the internal loads

We still have to improve the profiles for the consumption simulation

We expect to be able to predict the energy consumption with an accuracy of 5% or better

Measures to improve energy efficiency can be derived from the hourly data. They should be applied if discrepancies become more than 5%

We also will be able to derive rules for modeling of buildings and building systems to achieve the 5% accuracy

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Case Study Building 1: University of Stuttgart

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Already takenAlready taken• Identify energy saving potentialsIdentify energy saving potentials

Install data acquisition systemInstall data acquisition systemModel and analyze buildingModel and analyze building

• Define measures tobe takenDefine measures tobe taken• Realize the defined measuresRealize the defined measures• Implement an energy management systemImplement an energy management system• Visual control of the consumptionsVisual control of the consumptions• Generation of energy certificate

Next Steps Next Steps • Simulate consumptionSimulate consumption• Develop methods to reduce consumption to demandDevelop methods to reduce consumption to demand

Energy Certificate

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Case Study Building 2: Hospital in Hagenow

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Some data concerning Hagenow hospital

3 buildings Old, new, CHP power plant

rennovation 1999 to 2002

construction 1994 to 1998

Number of beds 172

area 16085,27 (NGF), 19341,83 (BGF)

Consumption/cost

gas 3.248.811kWh 136.781€

water 16162 m3 63.242€

eletricity 1.619.368kWh 171.311€

Maximum power 352 kW

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WP 6: Implementation in the demonstration buildings and

continuous assessment of performance

Ennovatis proposal on continuous performance assessment and identification of cost-effective measures

Presented byU. Jahn

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WP 6: Implementation in the demonstration buildings and continuous assessment of performance

WP 6 will evaluate the ability of the developed tools to help in the task to identify energy saving measures. The measures themselves should be low cost as they mainly concern the operational parameters

The aim of WP 6 is to reach a significant reduction of the energy use in the buildings by means of the analysis

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WP 6: Tasks

1. Implementation of the building specific concepts for continuous commissioning developed in WP 4

2. Installation of the data collection component3. Application of the tool(s) to the demonstration

buildings4. Continuous performance assessment and

identification of cost-effective measures to increase energy efficiency (payback time preferably less than 2 years).

5. Implementation of most desirable measures to increase energy efficiency together with building owner.

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WP 6: Outcomes and Deliverables

Outcome of this work package: Data measurement equipment and tools installed in

demonstration buildings Analysis of energy performance of demonstration

buildings Reduction of energy consumption in demonstration buildings

Deliverable(s) of this work package: D6: Report on energy savings, CO2 reduction and

practicability and cost-benefit of developed tools and continuous commissioning

D7: Guidelines for future development of EPBD in respect to commissioning

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Thank you very much for your attention

ennovatis GmbHStammheimerstr. 10D-70806 Kornwestheim

E-Mail: F.Schmidt@ennovatis.de

fon: +49 7154-83600-69

http://www.kenwo.de

http://www.ennovatis.de

Address Stuttgart branch