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© ennovatis GmbH 1 Status of Test and Demo Buildings used by ennovatis for Linking EPDB and Continuous Commissioning presentation at the 3rd BuildingEQ expert meeting by Ute Jahn, Dan Hildebrandt, Roland Kopetzky, Frauke Schönfeld and Fritz Schmidt ennovatis GmbH Germany Kornwestheim, December 2007
© ennovatis GmbH 2 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
© ennovatis GmbH 3 Test: ennovatis office building Großpösna
© ennovatis GmbH 4 Energy Certificates The German Implementation of the EPBD allows presently for two kinds of energy certificates. Demand driven energy certificate Demand driven energy certificate Consumption 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.
© ennovatis GmbH 5 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
© ennovatis GmbH 6 Case Study Building 1: University of Stuttgart
© ennovatis GmbH 7 Already taken Identify energy saving potentialsIdentify energy saving potentials Install data acquisition system Model 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 certificateGeneration of energy certificateGeneration of energy certificateGeneration of energy certificate Next Steps Simulate consumptionSimulate consumption Develop methods to reduce consumption to demandDevelop methods to reduce consumption to demand Energy Certificate
© ennovatis GmbH 8 Case Study Building 2: Hospital in Hagenow
© ennovatis GmbH 9 Some data concerning Hagenow hospital 3 buildingsOld, new, CHP power plant rennovation1999 to 2002 construction1994 to 1998 Number of beds172 area16085,27 (NGF), 19341,83 (BGF) Consumption/cost gas kWh € water16162 m € eletricity kWh € Maximum power352 kW
© ennovatis GmbH 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 by U. Jahn
© ennovatis GmbH 11 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
© ennovatis GmbH 12 WP 6: Tasks 1.Implementation of the building specific concepts for continuous commissioning developed in WP 4 2.Installation of the data collection component 3.Application of the tool(s) to the demonstration buildings 4.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.
© ennovatis GmbH 13 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
© ennovatis GmbH 14 Thank you very much for your attention ennovatis GmbH Stammheimerstr. 10 D Kornwestheim fon: Address Stuttgart branch
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