the unique and the ingenious q & a · 2018-01-18 · a powerhouse is a building that during...
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Powerhouse – the unique and the ingenious Powerhouse Kjørbo – facts and figures Powerhouse – economy and motivation Q & A
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ASPLAN VIAK AS:
Architecture
City and Area Planning
Building and Construction
Energy and the Environment
Communication and Transport Engineering
Landscape Architecture
ARCHITECTURE AND CONSULTING COMPANYApprox. 900 employees with expertise in:
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The beginning - 2010
Zero Emission Conference November 2010
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40%
Buildings account for approx. 40% of the global energy consumption
and represent a major contribution to the global greenhouse gas emissions.
The building industry´s responsibility
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A Powerhouse is a building that during it’s lifecycle produces more renewable energy than it consumes for production of building materials, construction, operation and demolition of the building.
Additional criterias:
• The quality of produced energy should not be lower than bought energy
• Minimum passivehouse standard (NS 3701)
• Appliances (PC, printers etc.) not included in the energy balance
• Embodied energy over the buildings lifecycle to be calculated in primary energy
• Shall be built within commercial market conditions
The unique - Definition of a Powerhouse
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The unique - Definition of a Powerhouse
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The first Powerhouse (concept) - Trondheim
New office building
Heated floor area: 13.000 m2
Approx. 500 workplaces
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Powerhouse Montessori – Kindergarten
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Powerhouse Telemark – Office building
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The unique – complexity
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The ingenious – the process
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The first Powerhouse – Kjørbo, Sandvika
Renovation of two office buildings
Originally built: 1980
Heated floor area: 5,180 m2
Project start: January 2012
Completed: April 2014
Objectives
Renovate to an energy positive building
Commercial market conditions
BREEAM-NOR «Outstanding»
Keep the expression of the building
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Powerhouse Kjørbo - location
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Energy concept
Consequent reduction of energy demand
Exposed concrete in ceiling for heat storage
Energy wells supply heat and free cooling.
Two heat pumps operating at different temperatures.
Local production of electricity
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Efficient heat recovery (85%)
Displacement ventilation
Use of the building staircases,(reduced duct lengths, low speed)
Demand controlled
Very low pressure drop (SFP 0,10-0,25)
Openable windows
Energy efficient ventilation concept
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Heat pump system
10 energy wells (200 meter)
2 heat pumps with different working temperatures (80 kW for space heating and 8 kW for DHW)
Free cooling in summer
COP better than expected (3,9 / 4,2 => 4,1)
District heating only as reserve – not necessary for peak load
Energy efficient heating concept
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High efficient PV-system
1550 m2 on the roof of building 4, building 5 and the roof of the garage.
Efficiency solar panels: 20,4 %
Installed power: 312 kWp
Electricity production: 220 000 kWh/year
Solar system
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Minimize embodied energy – reuse
The buildings’ structural systems remained
Materials such as old glass façades have been reused
All new materials were carefully chosen to ensure that the materials had low embodied energy.
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The solar system counts for approx. 30%.
Embodied energy - Powerhouse Kjørbo
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Building 4 and 5 before the refurbishment …
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…. and after.
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Office landscape before …
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…and after.
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Energy Dashboard
http://buildingdashboard.com/clients/powerhouse/kjorbo/index.php?mode=&kioskName=
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Energy performance
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Energy balance during 60 years of operation
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Transport
Embodied energy
Energy use
Climate gas emission Asplan Viak Sandvika
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Sustainable Transport
Electric cars Dedicated parking for electric cars is
available. Surplus energy from the solar system
can be used during summer.
Bicycle parking Safe and weather protected parking for
bicycles. E-bikes can be charged. Access with the office key card.
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Sustainable TransportV-powered
Surplus solar power from the Powerhouse can be used to produce hydrogen.
Electricity from the public grid can be used in periods without surplus of solar power.
Truck delivery, if necessary.
Solar Hydrogen Fuel Station P
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Solar Hydrogen Fuel Station P
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Thank you for your attention
Peter BernhardSenior Consultant, Energy and EnvironmentAsplan Viak AS, [email protected]: +47 40 40 78 62