ENERGY CONSERVATION IN CCISHEADQUARTERS BUILDING IN

LJUBLJANA

Jože Renar

Chamber of Construction and Building Materials Industry of Slovenia

ENERGY CONSERVATION IN CCISHEADQUARTERS BUILDING IN

LJUBLJANA

BASIC TECHNICAL DATA OF THE BUILDING

• Dimensions (m) (LxWxH) 55x27,5x25

• Netto surface 16.430m2• 7 floors• 2 level basement garages

7.000m2 • offices 3.486m2

• Corridors and communications 2.992m2

• Halls 927m2• Sanitary blocks 456m2• Engine and technical rooms

1106 m2

ENERGY CONSERVATION MEASURES

• Ownership of the house

• Simple measures, no big investmets consided, only if payback time is less than one year

• Quality of living in the bulding and quality of operating the building should not be reduced

ENERGY CONSERVATION IN CCIS ELECTRICITY

Our focus was electricitySubstantial price growth in 2009Annual consuption was about 1.17 milion kWh (160.000€/year)

ENERGY CONSERVATION IN CCIS ELECTRICITY

Installed Power Capacity kW Share

HVAC 371 65%

Lighting 126 22%

ITC 70 12%

Total 567 100%

AIR CONDITIONING

• 18 air conditioning sytems for the halls, corridors, meeting rooms, kitchen, restaurant, sanitary blocks

• Aprox. 100 fan coils for offices

• 4 water chillers

• Air handling units for halls have no heat recovery systems

AIR CONDITIONING CONSERVATION MEASURES

• Introduction of night cooling using only cool fresh air. Starting in early mornings for the main part of AC sytems

•

• Switch off all cooling sytems and their corresponding pumps at 21p.m.

• Adopt operation of AC Systems for halls according to their occupation

• Introduction of fixed time schedule for the operation of the fans in fan coils in all offices from 7a.m. to 18 p.m.

• Instruction for the employees to switch off fan coils when they leave their offices

LIGHTING

• Total capacity 126 kW• Operation 7-21 o´clock –working days• fluorescent bulbs, compact fluorescent bulbs

mostly and reflectors• Daily operation time schedules -no light sensors• Reduction of the lighting-upopular

LIGHTING CONSERVATION MEASURES

• Reduction of the use of reflectors as standard lighting where flourescent bulbs are available

• Strict time scedule programming of lighting and their manual adjustments to the weather conditions in halls and corridors

• Reduction of lighting in garage, sanitary blocks, and some corridors

• Instructions for employees to turn the lights off after use in sanitary blocks, copy rooms, utilities

ITC CONSERVATION MEASURES

• Rearangement of servers in computer room and their more efficient use

• Improvements of cooling systems of server room

• Instructions for the employees, to switch off their computers, printers and accessories daily

RESULTS OF ENERGY EFFICIENCY MEASURES

• Peak load is important indicator of power consumption• Highest values are achieved in the warmest summer days• Our program started in July 2010

Electricity peak load CCIS Headquaters 2009, 2010 and jan. 2011

100

200

300

400

1 2 3 4 5 6 7 8 9 10 11 12 1

Month

kW

h

2009

2010

RESULTS OF ENERGY EFFICIENCY MEASURES

• Reduced electricity consumption of 116.175 kWh in 7 months (-17%) Reduced costs of 14.500€ what means 2071€/month or 24.857 €/year

• Total investments cost of aprox. 8.000€

Electricity consumption CCIS Headquaters 2009, 2010 and jan. 2011

50.000

60.000

70.000

80.000

90.000

100.000

110.000

120.000

1 2 3 4 5 6 7 8 9 10 11 12 1

Month

kW

h

2009

2010

THANK YOU FOR YOUR ATTENTION

Jože Renar

Director of Chamber of Construction and Building Materials Industry of Slovenia