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Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Passive House Office Building EnerGonA Large Passive House with Geothermal Cooling
Gunter Lindemann, Gerhard Mengedoht
Steinbeis-Transferzentrum Energietechnik Ulm89075 Ulm
Congreso Nacional de Geotermia y Eficiencia Energética
Pontevedra – SpainJune 12th 2014
Sustainability means, to do something long term, without detriments
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Structure
1 Passiv House Definition
2 Passiv House EnerGonBasic InformationConstructionCosts Analysis
3 ExperiencesMeasuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Passive House Definition
Heat consumption limited to 15 kWh/m2a
Primary energy use limited to 120 kWh/m2a
Heat load max. 10 W/m2
Air tight (n50 < 0.6)
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building data
Address: Lise-Meitner-Str. 14, D-89081 Ulm
Storey: 5
Surface/Volume ratio: 0.22 m2/m3
Main usable floor area: about 5 412 m2
Gross volume: 32 223 m3
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Project Members
Building owner:Software AG-Stiftung (foundation), D-64297 DarmstadtArchitecture, construction documentation:oehler faigle archkom, D-75015 BrettenEnergy planning, building physics:ebök engineering office, D-72072 Tübingen
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Layout
Figure : Three corners, but 90◦ corners due to rounded sides
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building Usage
Designed for office work and software development,up to 420 employees
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
U-Values (W/m2K)
Skin 0.13Roof 0.12Glass Roof Atrium 1.80Outside Windows 0.84Ground Floor to Soil 0.22
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Characteristic Energy-Values (kW)
District heat 185Earthprobes heating 70Earthprobes cooling 108Cooling by heatpumps 34Photovoltaic 15
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Evaluation Research
2001–2006Peter Obert, Gunter LindemannSteinbeis-Transferzentrum Energietechnik Ulmwithin the scope of the SolarBau:MONITORprogram (support label Fkz 0335007G) of theministery for economy and technology.
2007–2012Gunter Lindemann,Steinbeis-Transferzentrum Energietechnik UlmGerhard Mengedoht,University of Applied Sciences, Ulm
sponsored by theRud. Otto Meyer-Environmental-Foundation(Hamburg)
supported by the University of AppliedSciences, Ulm
Figure : Atrium, interior view
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building Services Engineering
Atrium as fresh air distributor
Tempering with thermaly activeconcrete coreHeating
waste heat of cooling unitsin kitchen and IT areasDistrict heating(approx. 80 % biomass)
cooling by 40 geothermalearthprobes Figure : Entrance level
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
General Function
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building Skin, Timber Frame Building Skin
prefabricated timber frameboxes
one window wide, onefloor hight
OSB panel on the inside,woodfibre panel on theoutside
36 cm mineral woolinsulation
fixation for the outsidefootbridge without thermalbridges!
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building Skin, Timber Frame Building Skin
36 elements each floorand side
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building Skin, Timber Frame Building Skin
about 430 elements for thewhole building skin
some kilometers of tape may beused to ensure the air tightness
n50 value: 0.25
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building Skin, Timber Frame Building Skin
installation layer fornetwork and electricitybetween building skin andnoise absorbers
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building Skin, Timber Frame Building Skin
3-glass windowswith U-value 0.6W/m2K
two partedautomatic sunprotection
lower part preventscomputer screenblinding
upper part reflectslight to the ceiling(less usage ofartificial light tosave electricity)Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building Skin, Timber Frame Rooftop
70 cm space on theatrium side
40 cm space on thefassade side
later filled withcellulose insulation
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building Skin, Timber Frame Rooftop
thin film PV panel(15 kWp) as a sealinglayer
caps are open until thespace dried out (beforefilling)
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Concrete Core Tempering (Plastic Pipe Layer)
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Concrete Core Tempering
������������������������������������������������
10 W/m2 20 W/m2cooling powerheating power
28
sound absorbtion
screed
carpet floor
Heating and cooling over the ceiling,
not an underfloor heating!
Cooling power higher than heating power
10
concrete core with plastic pipes
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Building Costs
Building costs of usual office buildings:lowest level: simple buildings, poor comfortapprox. 1200¤ per m2 net floor spacehighest cost range: high comfort, highly automated, handicappedaccessible etc.approx. 2000¤ per m2 net floor space
EnerGon: high comfort, highly automated, handicappedaccessibleby cost group KG 300+400 (contains planning costs)accounted building costs: 1688¤ per m2 net floor space
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Basic InformationConstructionCosts Analysis
Operating Costs
Table : Operating costs EnerGon in comparison with OSCAR1
in ¤/m2 net floor space
EnerGon OSCAR
Current 0.40 0.36
Heating (district heating) 0.15 0.48
Maintanance + supervision 0.68 0.77
1Office Service Charge Analysis ReportGunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Measuring results for the whole building
Table : SolarBau demands and results, oriented on the net floor space
SolarBau- EnerGondemands
Heat consumption kWh/m2a < 40 12.3
Energy demanda kWh/m2a < 70 44.3
Primary energy demand(according to CO2-emission)
kWh/m2a < 100 72.6
awhole technical building equipment, incl. illumination
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Measuring results technical building equipment: geothermalprobes
Function
40 geothermal probes, each 100 m deep
preheating of fresh air and cooling of concrete core just by watercirculation between fresh air respectively concrete core and earth.
Without a heatpump!Just using a 3700 W circulation pump instead!
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Measuring results technical building equipment: geothermalprobes
Air preheating: approx. 50 MWh/a
Concrete core cooling: approx. 120 MWh/a
Annual COP: approx. 12 kWhtherm/kWhel
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Measuring results soil temperature
Figure : Development of the total soil temperature
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Measuring results soil temperature
Figure : Specific warming and obvious saturation
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Measuring results soil temperature
Figure : Soil Temperature 2003 to 2014
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Measuring results technical building equipment: concretecore tempering
Heat supply:priority use of waste heat out of cooling units in IT equipment andkitchen (food-cooling chamber)secondary use of district heating (approx. 80 % biomass)measured maximum flow temperature in the heating period: 25 ◦C
cooling:exclusive by geothermal probesmeasured minimum flow temperature in the cooling period: 19 ◦C
specific electricity consumption: approx. 1 kWh/m2a
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Measuring results use of electricity
Figure : Energy demand of building services and tenants
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Measuring Results Room Climate Summer/Winter
Figure : Room temperatures (hourly average) vs. outdoor temperatures,over 2 years of measuring
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Users Feedback
Most feel happy and comfortable
highly satisfied with the building cooling
often complains about to low room temperature in the winter,but the comfort survey resulted, that 66% feel to warm!
some are having problems with the air humidity in the winter(supply air limited to 35% relativ humidity)
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Owners Feedback
Building is ecological and economical
declared, that they would only build Passive Houses in the future
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Measuring results for the whole buildingMeasuring results technical building equipmentComfortFeedback
Conclusions
EnerGon meets the expectations of heating demand and comfort
The construction cost of EnerGon, compared with similarcomfortable buildings, are moderate
The energy costs are evident lower than that of similarcomfortable buildings
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Further questions
If you have further questions feel free to contact me at:[email protected]
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon
Passiv House DefinitionPassiv House EnerGon
ExperiencesContactSources
Sources
Obert, Lindemann: Passivhaus Energon Ulm, Bürogebäude imPassivhausstandard, Schlussbericht Monitoring, 2006
Portrait Nr. 17, Passivhaus Energon (Project Folder), 2002
Gunter Lindemann, Gerhard Mengedoht Passive House Office Building EnerGon