Energy efficient and Green Buildings in Germany Dipl.-Ing. Thomas Kleist GREYDOT engineering consultants
GREYDOT engineering consultants
Energy efficient and Green Buildings in Germany Dipl.-Ing. Thomas Kleist, GREYDOT engineering consultants 1. Green Building Definition 2. Green Building certificates 3. Green Building market in Germany 4. Green Building examples 5. Conclusion
Green Building certificates DGNB-System: building equipment related criteria criteria
criteria
ENV1.1
Life Cycle Assessment
SOC1.7
Safety and Security
ENV1.2
Local Environmental Impact
TEC1.1
Fire Prevention
ENV2.1
Life Cycle Assessment - Primary Energy
TEC1.2
Noise Protection
ENV2.2
Drinking Water Demand and Wastewater Volume
TEC1.4
Adaptability of Technical Systems
ECO1.1
Building-Related Life-Cycle Costs
TEC1.9
Sound Emissions
ECO2.1
Flexibility and Adaptability
PRO1.4
Sustainability Aspects in Tender Phase
SOC1.1
Thermal Comfort
PRO2.1
Environmental Impact of Construction
SOC1.2
Indoor Air Quality
PRO2.2
Construction Quality Assurance
SOC1.5
User Control
PRO2.3
Systematic Commissioning
GREYDOT engineering consultants
Green Building certificates DGNB certificates in Germany and Düsseldorf
GREYDOT engineering consultants
Green Buildings in Germany VDI Society Civil Engineering and Building Services VDI Society Civil Engineering and Building Services (VDI-GBG) Preparation of the new technical standard VDI 6050 Evaluation of the sustainability of the built environment – Training of professionals •
Training sessions for different fields of engineering (architects, HVAC, FM, etc.)
•
Reduction of the effort for the engineers to meet the specific requirements of the certification schemes
•
Become a certified professional in your field of engineering
•
Planned release: end of 2014
GREYDOT engineering consultants
Green Building market Does green planning strike the right note?
Retail percentage of Green Buildings 3-20% Offices percentage of Green Buildings 18-31%
Source: H. Horster, BNP Paribas Real Estate 2014
GREYDOT engineering consultants
Green Building market Why is there a share of 20-30% of Green Buildings? What are the drivers? •
Most international players have CSR obligations
•
A widespread CSR commitment is to rent energy-efficient, sustainable buildings (proved by certificate)
•
The CSR commitment is strongly related to the rating of the company
•
The quality and level of the award is decisive rather than the label
And what about the investors? •
Many investors now prefer green buildings, some are even no longer considering non-certified offerings
•
Investors often use certificates as a risk management tool - they assume that certified buildings can avoid future losses
•
Among others the Royal Institute of Chartered Surveyors (RICS) recommends energetic data and aspects of sustainability to be taken into account in appraisal reports
GREYDOT engineering consultants
Green Building market
net total costs €/m²*month
High costs of non Green Buildings
Source: Impact of Energy Efficiency on Real Estate Performance, Dr. Eglitis, IPD 2013
GREYDOT engineering consultants
Green Building examples Supermarkets & Shopping Center REWE market of the future Berlin
mfi AG Pasing Arcade Munich GREYDOT engineering consultants
REWE Berlin DGNB Gold certified wood
use of rainwater
GREYDOT engineering consultants
daylight
CO2-cooling
photovoltaic elements
geothermal energy
REWE Berlin Use of daylight Daylight simulation to find the optimum size and position of the openings
No artificial light is used during the day
GREYDOT engineering consultants
REWE Berlin Use of photovoltaic energy Photovoltaic (front roof) • area
332 m²
• performance
31 kWp
• output
25.000 kWh/a
Photovoltaic (main roof) • area
1.600 m²
• performance
133 kWp
• output
116.000 kWh/a
> 1/3 of total primary energy demand GREYDOT engineering consultants
REWE Berlin Reduction of primary energy demand Reduction about 48% CO2 neutrality renewable energies
cooled sales counters
green electricity
lighting cooling air conditioning warm water heating
REWE standard market GREYDOT engineering consultants
geothermal energy photovoltaik
REWE market of the future
Production of energy ~ 40%
REWE market of the future
Pasing Arcade Munich DGNB Gold certified
GREYDOT engineering consultants
Pasing Arcade Munich Shopping and residential building
GREYDOT engineering consultants
Pasing Arcade Munich Implementation of an energy effective cooling concept Central chilled water production •
The main cooling unit is located in the basement.
•
The cooling energy is supplied via a central chilled water pipe system.
•
In addition to the chillers, geothermal energy (use of groundwater) is used over a heat exchange unit and two ground-water cooled heat pumps.
•
Geothermal energy thus can, as a function of the groundwater temperature, provide up to 100 % of the required total cooling energy for the building in summer and at least 70 % in the winter.
•
To cover peak loads in winter the chillers work in free cooling mode and they are taken in operation only when needed.
•
In this way the mechanical refrigeration can minimize and reduce electricity costs.
GREYDOT engineering consultants
Pasing Arcade Munich Reduction of energy demand
GREYDOT engineering consultants
Green Buildings in Germany Conclusion • Green Building certificates act a main role in the real estate market in Germany • Investors will ask for verifiable energy efficient buildings • Good engineering will lead to cost effective solutions • The best solution is the optimum between investment costs into technical equipment and operational costs • Smart energy concepts make the built environment ready for the future
