EnTool 2013: TEK Tool Building performance analysis with characteristic values

Transkript

1 1 EnTool 2013: TEK Tool Building performance analysis with characteristic values M.Sc. Niklas Alsen Gottschalkstraße Kassel kassel.de kassel.de

2 2 Background Content Background Benchmarking of energy consumption Characteristic values of VDI TEK tool and its application Homepage IWU Homepage EnOB

3 3 CO 2 neutral state government Hesse Project: Weakness assessment of university buildings

4 4 Analysis of energetic weaknesses Example: Library in Frankfurt 1.2 Allgem eine Gebäudeeigenschaften Gebäudekategorie Hochschulen Unterkategorie Institutsgebäude für Lehre und Forschung Baujahr Gebäude 1964 Energiebezugsfläche m² davon künst. belichte 100 % mech. belüftet 100 % gekühlt 100 % befeuchtet 100 % A/V-Verhältnis 0,20 m-1 Anzahl der RLT-Anlagen 4 Anzahl zentr. Kälteerz. 2 Anzahl zentr. Wärmeerz. 1

5 5 How high is the potential to save energy? What are measures in which priority? Heating Lighting Cooling Hot water Ventilation Distribution and circulation Specific uses: Administration; Library; floors;

6 6 TEK Toolbox for the energetic analysis of existing nonresidential buildings Not treated today

7 7 Teilkennwerte Characteristic Values of nonresidential Buildings Methodological basics, empirical research and systematical analysis Supported by the Federal Ministry of Economics andtechnology within EnOB Project leadership and management IWU Institut Wohnen und Umwelt Institute for housing and environment Dipl. Phys. Michael Hörner Rheinstraße Darmstadt Project partners Fraunhoferinstitut für solare Energiesysteme ISE Universität Karlsruhe fbta ARGE Benchmark Energie 2000 Ingenieurbüro Jung Stadt Frankfurt am Main Techem Energie Contracting

8 8 Benchmarking of energy consumption Content Background Benchmarking of energy consumption Characteristic values of VDI TEK tool and its application Homepage IWU Homepage EnOB

9 9 Energy consumption analysis Benchmarking of heat and electricity Has building priority? 900 Monatswerte für Brennstoff - Nah/Fernwärme Jahreswerte für Brennstoff - Nah/Fernwärme 180 MWh/mon Verbrauchskennwert kwh/(m² NGF a) kwh/(m²a) District heating (incl. hot water) [kwh/mon] Monatswerte für elektrische Energie Verbrauchskennwert in kwh/(m² NGF a) Jahreswerte elektrische Energie 186 kwh/(m²a) Electric Energy

10 10 Energy consumption analysis Prioritizing within a building portfolio Index =

11 11 Characteristic values Content Background Benchmarking of energy consumption Characteristic values of VDI TEK tool and its application Homepage IWU Homepage EnOB

12 12 VDI 3807 Part 4: Characteristic values for electrical energy TEK methodology is a concretezation and further development of the VDI

13 13 VDI 3807 Part 4: Characteristic values for electrical energy Specific final energy [kwh/(m² a)] Centralised facilities Various technical equipment Workplace equipment Cooling Ventilation Lighting Characteristic values for all partial consumptions Centralised facilities: kitchens, central computing Various technichal equipment: auxiliary energies, elevators, Measured electricity consumption Characterisitic values Workplace equipment: PCs, printers, copiers

14 14 Characteristic values: Lighting VDI 3807 Part 4 Characteristic values for lighting (August 2011, extract) Specific final energy [kwh/(m² a)] Very high High Average Low Very low Efficiency level of demand classes very high Bad old buildings low New buildings high Old buildings Very low Optimised new buildings average Average existing buildings

15 15 Energy Assessment of buildings Degree of Detail Instrument Scope Preanalysis Weakness Assessment Detailed Analysis Benchmark Characteristic Values Comparison of Options Whole Building Whole Building / Zone Zone Formal Basis VDI 3807 Part 1,2 EnEV 2009 VDI , DIN V 18599, Dissertation Lichtmeß Simulations, DIN V 18599, MEG/LEG TEK Methodology TEK Toolbox

16 16 TEK Tool and its application Content Background Benchmarking of energy consumption Characteristic values of VDI TEK tool and its application Homepage IWU Homepage EnOB

17 17 Balancing procedure with TEK Tool Modifications compared to DIN V Genaral balancing procedure according to DIN V (effective ) Simplifications Input of thermal building envelope Matching building envelope to zones (dissertation Lichtmeß) Automatic generation of daylight areas No iteration between zone balance and heat from building services No heat transfer between zones Efficiency of heat generator simplified Simplified calculation of auxiliary energy from heat and cold distribution Individual definition of boundary conditions Number of working hours and days Room temperatures Internal gains Time periods for ventilaton Additional calculations Centralised facilities (kitchens, central computing, ) Various technichal equipment (auxiliary energies, elevators, ) Workplace equipment (PCs, printers, )

18 18 Comparison: Calculated demand measured consumption 1.3 Gemessene und berechnete Energiekennwerte (Endenergie; Gebäudeebene) berechnete Kennw erte 200 Brennstoff/FW el. Energie 180 kwh/(m² a) kwh/(m² a) 160 Diverse Technik * - 8,6 140 Zentrale Dienste ** 0,0 7,7 120 Arbeitshilfen - 1,4 Dampf 0,0 0,0 100 Hilfsenergie Kälte - 21,8 80 Kälte 0,0 24,0 60 Luftförderung - 64,5 40 Beleuchtung - 55,2 20 Warmw asser 0,0 0,0 0 Heizung 188,2 0,0 ges. Gebäude 188,2 183,3 Energiekennwert in kwh/(m² NGF a) Brennstoff - gemessen Brennstoff - berechnet el. Energie - gemessen el. Energie - berechnet 1.4 Berechnungseinstellungen Brennstoff / Elektrische TEK-Tool _ Version: 5.5 Fernw ärme Energie Flächen der therm. Geb.-hülle objektspez. gemessener kwh/(m²a) Zonenzuw eisung Hüllfläche automatisch Verbrauch MWh/a Stoffw erte therm. Geb.-Hülle objektspez. berechneter kwh/(m²a) Zonenzuw. Baut.-kennw erte automatisch Bedarf MWh/a Nutzungszeiten objektspez. Verh. Bedarf/Vebrauch - f b/v 1,34 0,99 interne Wärmequellen objektspez. Raumsolltemperaturen objektspez.

19 19 Valuation of partial primary energy demand regarding the specific use

20 Maximum alle Daten Minimum alle Zeit in Stunden ab jew 20 Weakness assessment with TEK Tool Effort and Benefit Effort: Time: 5 to 15 days Basic knowledge of DIN requiered (e.g. standard uses) Restrictions: TEK valuation depends heavily on standard uses With DIN V and thus with the TEK Tool not all aspects can be handled Wochenprofil elektrische Energ Benefits: Analysis of a whole building Coupling between disciplines (e.g. lighting and heating) Automatic TEK evaluation for all disciplines (in detail for single zones and aggregated for the wohle building) Also individually disliked disciplines need to be treated Detailed analysises can then focus on really relevant topics Energy savings can be quantified, visualised and economically evaluated Leistung in kw Montag Dienstag Mittwoch Donner 1.3 Gemessene und berechnete Energiekennwerte (E Energiekennwert in kwh/(m² NGFa) Brennstoff - gemessen Brennstoff - berechnet el. Energie - gemessen el. Energie - berechnet

21 21 Thank you for your attention TEK Tool soon available for free download: Website IWU: tektool.iwu.de