Kuggen. Ecopilot, energenious building automation system

  • by Ulf Falkenby
  • /
  • 2015-06-30 20:19:29
  • /
  • International
  • /
  • 9276 / EN

Renovation

  • Building Type : Office building < 28m
  • Construction Year : 2011
  • Delivery year : 2014
  • Address 1 - street : 412 96 GOTHENBURG, Sweden
  • Climate zone : [Dfc] Wet subarctic, cool summer, severe winter

  • Net Floor Area : 4 898 m2
  • Construction/refurbishment cost : 50 000 €
  • Cost/m2 : 10.21 €/m2

Proposed by :

  • Primary energy need :
    37 kWhpe/m2.year
    (Calculation method : )
Energy consumption
Economical buildingBuilding
< 50A
A
51 à 90B
B
91 à 150C
C
151 à 230D
D
231 à 330E
E
331 à 450F
F
> 450G
G
Energy-intensive building
KabonaAB

Kabona is a company which works with energenious energy building automation and the company’s head office is locatedin Borås, Sweden. Kabona was founded in 2001 and has long-standing and solidexperience, which has formed the basis of our innovative and energy smartproduct Ecopilot. Since 2012 Kabona has been owned by Investment AB Latourwhich is registered on the Stockholm Stock Exchange under Large Cap.

Project property Kuggen, Lindholmen Göteborg – independent evaluation of Ecopilot in amodern office building

The project’s aim is a thorough evaluation of special functions for integrated control of heating, cooling and ventilation, specifically adapted to utilise the building’s thermal inertia.Kabona refers to a long series of projects where Ecopilot has resulted inenergy savings of 25%, with retained or improved quality of the indoor climate. However, no independent evaluation of the system has been conducted yet, whichis the aim of this project.

About the building

The building Kuggen is an office building of 4,898 m2 divided on 5 floors and was put into operation in 2011. From the start, even before Ecopilot, the building had good energy performance and has been certified in accordance with the EU programme for energy-efficient building, Green Building.

Installation of the new superior control system, Ecopilot, was conducted on 27 August 2014 and this evaluation focused on how this has impacted the indoor environment, energy consumption and operation.

The building’s performance before Ecopilot

According to the energy statistics of 2013from Göteborg Energi, Kuggen’s energy consumption is 37 kWh/m2 peryear for heating (temperature corrected) and 9 kWh/m2 for districtcooling. In 2013 the consumption of property electricity amounted to 27 kWh/m2year and business electricity to 28 kWh/m2. The results of consumption before and after Ecopilot are presented under conclusion below.

Evaluation

The evaluation was performed by an independent party, CIT Energy Management AB, without links to the supplier of Ecopilot. In order to ensure correct installation and operation of the system,CIT collaborates with both Chalmersfastigheter and Kabona. This evaluationcovers six months (the time period September 2014 – February 2015).

See more details about this project

 https://sv.wikipedia.org/wiki/Kuggen
 http://www.energi-miljo.se/artikelem/ny-styrning-viktig-kugge-for-miljon/

Data reliability

Self-declared

Stakeholders

    Other consultancy agency

    CIT Energy Management AB

    Lars Ekberg; lars.ekberg@cit.chalmers.se

Contracting method

Other methods

Owner approach of sustainability

Kabona delivered energenious building management system, Ecopilot, into this building.

Architectural description

The building was build commissioned in 2011 and consists of 190 "cogs" where each rack corresponds to an office module. The building has 5floors and floor plan area increases with the height of the building in order to create shade for the bottom field. The top floor is provided with a 98m2 mobile sun blocking system to follow the the sun's movement. Rack is designed with a clear sustainability profile with good energy and has been marked in accordance with EU programs for energy-efficient construction (Green Building) and certified in accordance Environmental Building Class gold. The building has a circular shape and the overall temperate area (Atemp) is 4898 m2. The facade consists of display tiles and the windows are triangular to reduce window area but allow natural light deep into the building.

Energy consumption

  • 37,00 kWhpe/m2.year
  • 55,00 kWhpe/m2.year
  • 37 kwh/m2/year - heating
    9 kwh/m2/year - cooling
    27 kwh/m2/year - property electricity

    All kwh above was BEFORE we installed the Ecopilot.
    Energy savings with Ecopilot:
    Heating: -49%
    Cooling: -50%
    Property electricity: -30%

  • 73,00 kWhpe/m2.year

Envelope performance

  • 1,00 W.m-2.K-1
  • About envelope U-value:
    We dont have any numbers but I have to write something down to get futher on with in this form.
    The buildning its a Green Building classification

Real final energy consumption

    42,00

    42,00

    2 013

Systems

    • Urban network
    • Heat pump
    • Heat pump
    • Solar Thermal
    • Urban network
    • VAV Syst. (Variable Air Volume system)
    • Natural ventilation
    • Free-cooling
    • Solar Thermal
    • No renewable energy systems

    Existing heating, cooling and ventilation systems

    The building is ventilated with a VAV system (Lindinvent), which is controlled based on presence and CO2. There isalso a connection to radiator valves for sequence control of heating/cooling.The air handling unit (Fläkt Woods) is equipped with rotating recovery andspeed control. There is also a small unit which supports a few fume cupboardsand local exhausts. This unit has fluid coupled heat recovery. The building hasa radiator system and district heating is the primary heat source. However,there are two supplementary heat sources:

    1) Solar collectors on the roof heat thehot service water. The solar heat is measured separately and data is easilyavailable in the computerised control unit (CCU). Two meters allow measurementof the warm water consumption.

    2) An outdoor air heat pump heats thereturn on the secondary side. This also has separate meters through CCU.

    The building’s cooling system is supportedwith district cooling. The cooling consumption is measured. Electricity forproperty management is measured separately from business electricity. Businesselectricity is measured separately for each floor (5 floors

Smart Building

    See decription about Ecopilot

    The quantity of heat produced from the heatpump differs markedly from the autumn of 2014 compared to the previous year,and if these values are included the total heat saving is approximately 50% for the six months. The quantity of consumeddistrict cooling during the period with Ecopilot (September 2014 – February2015) was approximately 50% lower than without, but as the cooling demand was low during this period anevaluation with higher outdoor temperatures needs to be conducted in order todraw general conclusions.

    Propertyelectricity declined by 30% during the period withEcopilot and parts of the saving are linked to the heat pump being in operationto a lesser degree.

    Without Ecopilot Sep 2013 – Feb 2014 (MWh)
    With Ecopilot Sep 2014 – Feb 2015 (MWh)
    Diff (MWh)
    Energy saving (%)
    District heating consumption
    82.88
    43.15
    -39.73
    -48 %
    Temperature corrected district heating consumption
    87.67
    49.53
    -38.14
    -44 %
    Heat from heat pump
    90.58
    44.49
    -46.09
    -51 %
    Total heat consumption
    173.46
    87.64
    -85.82
    -49 %
    District cooling
    6.37
    3.20
    -3.17
    -50% (5)
    Property electricity (incl. electricity for heat pump)
    85.20
    59.82
    -25.38
    -30 %
    Business electricity
    75.31
    78.32
    3.01
    +4%
    (5) Does not cover the summer season with greatestneed of cooling and therefore it is difficult to draw conclusions about thesaving.

    The conclusions which could be drawn arethat the requirements for the indoor environment are fulfilled with Ecopilot and that with the new control youhave greater variations in the room temperature and air flow, especially duringthe summer drop, but that the greater variation takes place outside the comfortperiods.

    At Kabona we look forward to contributing to property owners in Europe lowering their energy consumption to the lowestlevel possible in a cost-efficient manner, with a payoff of approximately 3–5years.

Indoor Air quality

    The conclusions which could be drawn are that the requirements for the indoor environment are fulfilled with Ecopilot. At Kabona we look forward to contributing to property owners in Europe lowering their energy consumption to the lowest level possible in a cost-efficient manner, with a payoff of approximately 3–5 years.

Product

    Ecopilot

    Kabona AB

    Ulf Falkenby; ufa@kabona.com

    Ecopilot is a new system with integrated control of ventilation, heating and cooling. Ecopilot functions brilliantly, both for new production and existing properties where we over-modulate existing BMS. The system particularly takes into account heat storage in the building and thereby counteracts the need of, in a short duration, alternating from heating to cooling, and vice versa. Ecopilot optmises energy with respect to internal loads, weather forcast, indoor temperature, wind impact and sun insolation.

    They are very happy about the huge enrgy savings that we have accomplished
    The conclusions which could be drawn are that the requirements for the indoor environment are fulfilled with Ecopilot and that with the new control you have greater variations in the room temperature and air flow, especially during the summer drop, but that the greater variation takes place outside the comfort periods.

    There is a full report from this study that you can get from Mr Lars Ekberg at CIT Management

    https://www.construction21.org/data/sources/users/15156/ecopilot-picture-awards.pptx

Construction and exploitation costs

  • 40 000
  • 8 000

Urban environment

Kuggen is located in a business area close to the water.
There are many opportunities for public transportation. The bus station is just outside the building, 50 meters, and its takes only 9 minutes to the city center of Gothenburg

Building Environmental Quality

  • energy efficiency
Our unique product – Ecopilot

Ecopilot is a new system with integrated control of ventilation, heating and cooling. Ecopilot functions brilliantly,both for new production and existing properties where we over-modulate existingequipment. The system particularly takes into account heat storage in thebuilding and thereby counteracts the need of, in a short duration, alternatingfrom heating to cooling, and vice versa. So the point is that the systemresults in “calmer” control, which in turn leads to reduced energy consumption,lower heating and cooling power needs and retained or improved quality of theindoor climate. There are currently approximately 320 installed Ecopilots. Formore information about the product and our customers, please logon toecopilot.com

Contest categories

Low energy renovation

Low energy renovation

Smart Buildings

Smart Buildings

Green Building Solutions Awards 2015


Author of the page


  • Other case studies

    More

    Contest

    Green Building Solutions Awards 2015