Sustainable Energy Efficient Commercial Buildings Design, Construction and Operation Dipl. Ing. Architect Thomas Wilken Deputy head of Institute Building Services and Energy Design (IGS) Prof. Dr.-Ing. M. Norbert Fisch Faculty of Architecture, Civil Engineering and Environment Technical University Braunschweig energydesign braunschweig GmbH www.energydesign-braunschweig.de
Development Energy Efficient Res. Buildings - Germany Primary Energy for Heating (kwh/(m ( 2 a) Building Code Requirements Existing Building Stock R + D- Projects zero energy buildings net surplus energy buildings
Winner of Solar Decathlon Oktober2009 (USA) Team Germany TU- Darmstadt (Prof. M. Hegger)
Solar Academy SMA, Kassel (2009)
Sunny Island self-sufficient renewable energy supply Solar Academy SMA, Kassel (2010)
future energy standards Primary Energy Credit kwh/(m 2 a) credit bigger than supply Net Surplus credit lower than supply Energy credit energy saving Primary Energy Demand kwh/(m²a)
Sustainable and Energy Efficient Commercial Buildings Green / Eco / Buildings
Energy- optimized commercial buildings (EnOB) in comparison to the average of new buildings 500 Prim ary energ gy consum mption [k kwh/m²a] 400 300 200 100 equipment operation average R+D buildings (EnBau) new commercial buildings (EVA)
More than Energy! Energy Efficiency Indoor Environment Quality Human in Mind!
office space cubicles and classrooms (USA 2006)
student performance School performance and ventilation Pilot study- ASHRAE project (DTU, B. Olesen, 2007) perform mance School 1,4 1,2 1,0 0,8 06 0,6 R 2 = 0.70 0 500 1000 1500 CO 2 concentration above outdoors (ppm)
Productivity - Healthy Indoor Climate 120 100 100 116 80 70 60 40 20 0 Productivity in Productivity Productivity in Old Building During Move New Building yearly costs office buildings 75 to 80 % staff cost 10 to 14 % investment 8to10% operation (incl. energy)
Sustainable - Certifications German Energy Passport (2007) Sustainable Building Certification (2009)
German sustainable Building labeling system Performance mark certificate Ecological quality 22,5% Economical quality 22,5% Sociocultural and functional quality 22,5% Technical quality 22,5% Process quality 10,0% Quality of the location
Innovation Cycle Design- Construction- Operation! design/ concept innovation- circle monitoring evaluation optimized operation construction transformation quality- control
Towards a sustainable energy supply React to the environment Use of renewable resources Combined heat and power production Demand response Intelligent grid
concept of sustainable energydesign + building envelope HVAC comprehensive energy concept
International Solar Center Berlin Investment Costs 55 Mio. Finished in 2003 Floor Area 22 200 m² ISC Ostbahnhof Spree Architects: Bothe, Richter, Teherani, Hamburg
energy concept development and research
energy concept development and research Mean Atriumtemperature 29,4 C Inlettemperatur 29,3 C without shading device Mean Atriumtemperature 27,8 C Inlettemperature 29,3 C with internal shading device
energy concept development and research summer
International Solar Center Berlin
Shifting loads reducing HVAC cooling power power peaks without phase lag cooling power balance of peaks by phase lag 0:00 Uhr t 12:00 Uhr 0:00 Uhr 12:00 Uhr t mech. ventilation Cooling ceiling total cooling power mech. ventilation concrete core - activation total cooling power
International Solar Center Berlin -64%
Energy performance of office buildings Primary energy-use [kwh/(m²a)] 1600? 1200 1000 800 400 400 100 0 EnOB Germany USA China
ZZB Berlin Informatikzentrum TU - BS EnergieForum Berlin
Energy- Optimized Building Main RESULTS - Objectives mainly achieved! - No remarkable additional costs! New Office Buildings BUT comprehensive concepts demanding new requirements for Design, Construction, Commissioning and Operation as well as Post Commissioning
ENOB: Low Energy Demonstration Buildings in Germany (BMWi) www.enob.info
450 rf [kwh/(m 2 a)] 2 Jährl. Heizwärm mebedar 400 350 300 250 200 150 100 50 DIN 4108 WschVo EnEV 0 1970 1980 1990 1995 2000 2009 Non residential? electricity demand! total energy efficiency EnEV 2009 / DIN 18599
development of energydemand regulations quantity of regulations development of energy demand DIN WSVO WSVO EnEV 2007 EnEV 2009 4108 1977 1995 DIN V 18599 EEWärmeG etc.
Primary energy balance for non residentials EnEV 2009 / DIN 18599 power grid Energieb bedarf (k kwh/(m 2 a)) gas district heating cooling ventilaton less regenrativ power lighting heating PE-demand d power PE-demand d demand heat demand power
Energiebedarfausweis Paper of Energy demand this building 97,5 kwh/(m²a) comparative value new building comparative value refurbishment Primärenergiebedarf nach 18599 97,5 < 100 kwh/m²a für Heizung, Lüftung, Beleuchtung
Climate of Tunis IG S sun chart 36.83 N temperature
excellent building envelope reduced external and internal loads
Reducing HVAC FinanzIT, Architects: Hascher + Jehle
conventional installation - HVAC air exchange rate 8-10 1/h needed d for high h heating and cooling loads
Efficient installation - HVAC Floor hight 0,5 0,75 m Radiant Heating/Cooling air exchange rate 1,5 to 2 per hour, hygienic i needed d 3,25 to 3.5 m
comparison conventional high h efficient i high air-change rate only needed airchange rate traditional HVCA covered ceiling smart technical devices high comfort renewable cooling possible
Features of advanced radiative cooling, comfort ventilation and lighting
Features of advanced radiative cooling, comfort ventilation and lighting
Energydesign conventional concept 6/12 C suspended ceiling
Energydesign innovative concept Gas gas absorption chiller reduced airchange rate reduced solar gains panel heating Radiative Cooling / Heating energy piles
solar conditioning Presse- und Informationsamt der Bundesregierung Berlin Arch. KSP Braunschweig
solar conditioning thermal collectors storage heat exit air exhaust air outdoor air supply air
design 4 by Andy Schröder Lennart Schlüter
Visionen/ Konzepte von morgen Masdar Developement- Abu Dhabi Norman Foster Architekten
Enertopia Arabia Climate change is global ENERTOPIA - a local l solution for the future.. Solar energy self- sufficient commercial building
Enertopia Arabia contemporary architecture with traditional Arabic elements ENERTOPIA form follows energy
Enertopia Arabia Energy self-sufficient Commercial Building
Solar energy membrane use as shading (sun) protecting (wind, sand storm) - collecting (sun).. photovoltaic as energy supply and shading hot evening wind (north/west) cool morning wind (South/East) adiabatic cooling pool/plants
Enertopia Arabia Energy Concept Challenge of the future storing the sun advanced mega power battery concept. solar thermal collector cooling tower chilled ceiling chilled floor photovoltaic fresh air supply air (20 C/50%) exhaust air power inverter battery ~ Chiller 2 Chiller 1 compression chiller for high temperature (16 C/20 C) compression chiller for low temperature (6 C/12 C) solar assisted air conditioning
Thank you