Mikko Kaarakainen, Finland VAMK

Rene Paju Finland Metropolia UAS

Alexandra Ciocoiu, Romania Vasile Alecsandri

Keith Raekelboom, Belgium UA

Lukas Lazar, Germany HS Bremen

Iasonas Vovos, Greece UP

GROUP 4

PROJECT VILLA

Construction date 1910-1920

Stone walls

Wooden doors

Wooden frames in roof, doors and windows

(30 cm concrete rings on top of the walls)

(concrete planes beneath the floor)

BUILDINGConstruction facts Usage

Office building

12 employees

250 Working days / year

Current situation

HEATING COOLINGLighting and other electricity

No mechanical ventilation

Chiller

Lightning is mixture of 60W incandescent lamps and 23W CFLs

Server computers Computers

Radiators Diesel boiler Electrical hot water

boiler

CLIMATEClimate data for Patras

Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year

Average high °C (°F) 14.5

(58.1)

15.0

(59)

16.8

(62.2)

19.7

(67.5)

24.2

(75.6)

28.0

(82.4)

30.1

(86.2)

30.9

(87.6)

28.2

(82.8)

24.1

(75.4)

19.5

(67.1)

16.1

(61)

22.3

(72.1)

Daily mean °C (°F) 10.3

(50.5)

10.7

(51.3)

12.3

(54.1)

15.0

(59)

19.1

(66.4)

22.7

(72.9)

24.8

(76.6)

25.3

(77.5)

22.7

(72.9)

18.9

(66)

14.9

(58.8)

11.9

(53.4)

17.4

(63.3)

Average low °C (°F) 6.1

(43)

6.4

(43.5)

7.7

(45.9)

10.2

(50.4)

13.9

(57)

17.4

(63.3)

19.4

(66.9)

19.6

(67.3)

17.2

(63)

13.8

(56.8)

10.3

(50.5)

7.6

(45.7)

12.5

(54.5)

Rainfall mm (inches) 89.1

(3.508)

81.7

(3.217)

63.3

(2.492)

47.8

(1.882)

28.9

(1.138)

7.5

(0.295)

4.6

(0.181)

5.2

(0.205)

28.3

(1.114)

72.2

(2.843)

118.0

(4.646)

116.1

(4.571)

662.7

(26.091)

Avg. rainy days 12.0 10.6 9.9 8.4 5.3 2.2 1.0 1.0 3.6 7.8 11.0 13.2 86

• Design

• Insert the data

• Existing energy consumption

Simulation of villa

Results:Heating Cooling

Energy consumption

Current situation

• Lightning: 5800 kWh

• Computers: 10800 kWh

• Servers, UPS, switches: (running through the year) 39000 kWh

• Cooling: 8560 kWh

• Heating: 6070 kWh

Total: 75000 kWh

Diesel Heater

oRadiator

ChillerElectrical Power

Heating and Cooling

Constructional Improvements

Windows:

• Current windows U value of 4,8

• Improve use of silicone or a film

• Or replace with double glazing

• Expensive! But U value of 2,0

Insulation

• Common U value in Greece = 0,7

• Thickness: approximately 10 cm

• Rockwool

Passive Ventilation: Chimney Effect

Electrical Improvements

Install consumption meters for measuring energy consumption

New LED lamps

Daylight controlled intelligent lightning system (DALI)

Intelligent lightning system

Energy consumption after improvements

Tighter windows, insulated roof, new lamps, lightning control system

• Lightning (7 W LED): 832 kWh

• Computers: 10800 kWh

• Servers, UPS, switches: 39000 kWh

• Cooling: 7240 kWh

• Heating: 4400 kWh

Total: 66400 kWh

Annual savings • With insulations and lightning improvements

• Saved energy (0,15 €/kWh)

• In heating

• ΔE = 1670 kWh -> 250 €

• In cooling

• ΔE = 1320 kWh -> 200 €

• In lightning

• ΔE = 4970 kWh -> 750 €

• Using mechanical ventilation

• ΔE = 660 kWh -> 100 €

Total savings: 8600 kWh -> 1300 €

Diesel Heater

oRadiator

Heat Pump

Electrical Power

Envi

ronm

enta

l Energ

y

Improved Heating and Cooling System

Selling the Diesel heater

New pump for heating cycle

New UV-opaque insulation outside

Renew pipe insulation

Install PV on the campus

What to improve

o New roof/fix ito New plaster

o white plaster to reflect light/radiation

o No insulation o thick wallso PV panels on the roof

o south orientation possibleo Caps above the windows and doorso New doorso New windowso New water pipeso Connect electricity

HOUSE 1

o Plaster on the outside walls o Renovation of the balcony:

o New plastero New paint

o New door

HOUSE 2

o Best shaped buildingo Only some slight changes:

o New paint surfaceo etc

HOUSE 3