Stakeholders

Function : Other consultancy agency

CIT Energy Management AB

Lars Ekberg; [email protected]

 http://www.energy-management.se

Contracting method

Other methods

Energy consumption

• Primary energy need : 37,00 kWhpe/m².year
• Primary energy need for standard building : 55,00 kWhpe/m².year

Calculation method : Primary energy needs

CEEB : 0.0004

Breakdown for energy consumption : 37 kwh/m2/year - heating
9 kwh/m2/year - cooling
27 kwh/m2/year - property electricity

• Initial consumption : 73,00 kWhpe/m².year

Envelope performance

• Envelope U-Value : 1,00 W.m^-2.K^-1
More information :

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

More information

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

Real final energy consumption

Real final energy consumption/m2 : 42,00 kWhfe/m².year

Real final energy consumption/functional unit : 42,00 kWhfe/m².year

Year of the real energy consumption : 2 013

Systems

Heating system :
• Urban network
• Heat pump
Hot water system :
• Heat pump
• Solar Thermal
Cooling system :
• Urban network
• VAV Syst. (Variable Air Volume system)
Ventilation system :
• Natural ventilation
• Free-cooling
Renewable systems :
• Solar Thermal
• No renewable energy systems
Other information on HVAC :

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

BMS :

See decription about Ecopilot

Users’ opinion on the Smart Building functions : 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.

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

Product

Ecopilot



Kabona AB

Ulf Falkenby; [email protected]

 http://www.ecopilot.com


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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

• Cost of studies : 40 000 €
• Subsidies : 8 000 €

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.