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FG TGA
1 EnTool 2013: TEK‐ToolBuilding performance analysis with characteristic values
M.Sc. Niklas Alsen
Gottschalkstraße 28 34109 Kassel
alsen@uni‐kassel.dewww.tga.uni‐kassel.de
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Background
Content
• Background• Benchmarking of energy consumption • Characteristic values of VDI 3807‐4• TEK‐tool and its application
• Homepage IWU• Homepage EnOB
Content
• Background• Benchmarking of energy consumption• Characteristic values of VDI 3807‐4• TEK‐tool and its application
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3 CO2‐neutral state government HesseProject: Weakness assessment of university buildings
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4 Analysis of energetic weaknessesExample: Library in Frankfurt
1.2 Allgemeine GebäudeeigenschaftenGebäudekategorie HochschulenUnterkategorie
Baujahr Gebäude 1964Energiebezugsfläche 19.571 m²davon künst. belichte 100 %
mech. belüftet 100 %gekühlt 100 %befeuchtet 100 %
A/V-Verhältnis 0,20 m-1
Institutsgebäude für Lehre und Forschung
Anzahl der RLT-Anlagen 4Anzahl zentr. Kälteerz. 2Anzahl zentr. Wärmeerz. 1
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5 How high is the potential to save energy?What are measures in which priority?
Hot water
Lighting
Ventilation
Cooling
Distribution and circulation
Specific uses:• Administration; Library; floors; …
Heating
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6 TEK ‐ Toolbox for the energetic analysis of existingnonresidential buildings
Not treated today
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7Teilkennwerte –
Characteristic Values of nonresidential BuildingsMethodological basics, empirical research and systematical analysis
Project leadership andmanagement
IWU ‐ Institut Wohnen und UmweltInstitute for housing and environment
Dipl.‐Phys. Michael HörnerRheinstraße 65
64285 Darmstadt
Project partners• Fraunhoferinstitut für solare
Energiesysteme ISE• Universität Karlsruhe fbta
• ARGE‐Benchmark• Energie 2000
• Ingenieurbüro Jung• Stadt Frankfurt am Main
• Techem Energie‐Contracting
Supported by theFederal Ministry of Economics and Technology
within EnOB
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Benchmarking of energy consumption
Content
• Background• Benchmarking of energy consumption• Characteristic values of VDI 3804‐7• TEK‐tool and its application
• Homepage IWU• Homepage EnOB
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9 Energy consumption analysisBenchmarking of heat and electricity – Has building priority?
0
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h/m
on]
Monatswerte für elektrische Energie
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Verbrauchskenn
wert in kW
h/(m
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Jahreswerte elektrische Energie
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Jahreswerte für Brennstoff - Nah/Fernwärme
140 kWh/(m²a)
186 kWh/(m²a)
District heating(incl. hot water)
Electric Energy
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10 Energy consumption analysisPrioritizing within a building portfolio
Index =
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Characteristic values
Content
• Background• Benchmarking of energy consumption• Characteristic values of VDI 3807‐4• TEK‐tool and its application
• Homepage IWU• Homepage EnOB
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12 VDI 3807 Part 4: Characteristic values for electrical energy
TEK methodology is a concretezation and further development of the VDI 3807‐4
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VDI 3807 Part 4: Characteristic values for electrical energy
Various technichal equipment:auxiliary energies, elevators, …
Centralised facilities:kitchens, central computing …
Workplace equipment:PCs, printers, copiers …
Characteristic values for all partial consumptions
Centralised facilities
Various technical equipment
Workplace equipment
Cooling
Ventilation
Lighting
Measured electricity
consum
ption
Characterisitic
values
Specific fin
al ene
rgy [k
Wh/(m
² a)]
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14 Characteristic values: LightingVDI 3807 Part 4
Efficiency level of demand classes
very high Bad old buildings low New buildings
high Old buildingsVery low Optimised new buildings
average Average existing buildings
Very high High Average Low Very low
Characteristic values for lighting (August 2011, extract)
Specific fin
al ene
rgy [k
Wh/(m
² a)]
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15 Energy Assessment of buildings
Preanalysis Weakness Assessment Detailed AnalysisDegree of Detail
Instrument
Scope
Formal Basis
Benchmark
Whole Building
VDI 3807 Part 1,2EnEV 2009
Characteristic Values
Whole Building / Zone
Comparison of Options
Zone
Simulations, DIN V 18599, MEG/LEG
TEK‐Toolbox
VDI 3807‐4, DIN V 18599, Dissertation Lichtmeß
TEK‐Methodology
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TEK‐Tool and its application
Content
• Background• Benchmarking of energy consumption• Characteristic values of VDI 3807‐4• TEK‐tool and its application
• Homepage IWU• Homepage EnOB
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17 Balancing procedure with TEK‐ToolModifications compared to DIN V 18599
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
Genaral balancing procedure according to DIN V 18599 (effective 2005‐2007)
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, …)
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18 Comparison: Calculated demand – measured consumption
1.3 Gemessene und berechnete Energiekennwerte (Endenergie; Gebäudeebene)berechnete Kennw erte
Brennstoff/FW el. EnergiekWh/(m² a) kWh/(m² a)
Diverse Technik * - 8,6Zentrale Dienste ** 0,0 7,7Arbeitshilfen - 1,4Dampf 0,0 0,0Hilfsenergie Kälte - 21,8Kälte 0,0 24,0Luftförderung - 64,5Beleuchtung - 55,2Warmw asser 0,0 0,0Heizung 188,2 0,0ges. Gebäude 188,2 183,3
1.4 BerechnungseinstellungenBrennstoff / Elektrische TEK-Tool _ Version: 5.5Fernw ärme Energie Flächen der therm. Geb.-hülle objektspez.
gemessener kWh/(m²a) 140 186 Zonenzuw eisung Hüllf läche automatischVerbrauch MWh/a 2.749 3.634 Stoffw erte therm. Geb.-Hülle objektspez.
berechneter kWh/(m²a) 188 183 Zonenzuw . Baut.-kennw erte automatischBedarf MWh/a 3.684 3.587 Nutzungszeiten objektspez.
1,34 0,99 interne Wärmequellen objektspez.Raumsolltemperaturen objektspez.
Verh. Bedarf/Vebrauch - fb/v
020406080
100120140160180200
Brennstoff -gemessen
Brennstoff -berechnet
el. Energie -gemessen
el. Energie -berechnet
Ener
giek
ennw
ert i
n kW
h/(m
² NG
Fa)
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19 Valuation of partial primary energy demandregarding the specific use
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20 Weakness assessment with TEK‐ToolEffort and Benefit
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
Effort:• Time: 5 to 15 days• Basic knowledge of DIN 18599 requiered (e.g.
standard uses)
Restrictions:• TEK valuation depends heavily on standard uses• With DIN V 18599 and thus with the TEK‐Tool
not all aspects can be handledDonner
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0 24 48 72
Leist
ung i
n kW
Zeit in Stunden ab jew
Wochenprofil elektrische EnergMaximum alle Daten Minimum alle
Montag Dienstag Mittwoch
1.3 Gemessene und berechnete Energiekennwerte (E
020406080
100120140160180200
Brennstoff -gemessen
Brennstoff -berechnet
el. Energie -gemessen
el. Energie -berechnet
Ener
giek
ennw
ert i
n kW
h/(m
² NG
Fa)
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Thank you for your attention
TEK‐Tool soon available for free download:• Website IWU: tektool.iwu.de
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