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Energy Performance of Currently Constructed Residential Buildings
George Abulashvili
EEC Georgia
5th International Forum on Energy for Sustainable Development
UNECE HLM workshop “Energy efficiency for sustainable housing”
Hammamet, Tunisia, 5 November 2014
ENERGY EFFICIENCY CENTRE GEORGIA
Georgia
Territory- 69,700 km², 9 regions Population-about 4.4 million Geography: mountain ranges and hills comprise 80% of Georgian territory
Climate The climate is dry and continental in eastern Georgia with hot summers and mild winters. The climate in western Georgia and on the Black Sea coast is warm and semitropical. Capital-Tbilisi-population 1.480 ml 4 cities with population 100,000 and more
ENERGY EFFICIENCY CENTRE GEORGIA
Currently constructed building example #1
The R value for walls: 0,662 [m 2 o C/W] The U value for walls: 1,51 [W/ m 2 o C]
ENERGY EFFICIENCY CENTRE GEORGIA
Currently constructed building example #2
The R value for walls: 0,542 [m 2 o C/W] The U value for walls: 1,845 [W/ m 2 o C]
ENERGY EFFICIENCY CENTRE GEORGIA
Summary table of wall thermal performance for currently constructed buildings
Residential buildings/
Minimum thermal performance level by old Soviet Codes R0
req
Thermal performance value specifically for constructed building
Heat transfer
coefficient
Construction [ m 2 o
C/W] R0 wall[ m 2 o
C/W] U value
[W/ m 2 o C] 1 Building 1 0.555 0.743 1.346 2 Building 2 “ 0.738 1.355 3 Building 3 “ 0.738 1.355 4 Building 4 “ 0.542 1.845 5 Building 5 “ 0.738 1.355 6 Building 6 “ 0.662 1.51 7 Building 7 “ 0.542 1.845 8 Building 8 “ 0.881 1.135 Weighted Average 0.698 1.468
ENERGY EFFICIENCY CENTRE GEORGIA
A Residential Building with improved EE
Heated area: 15203m2 Net heated volume: 42872m3 Total area of external walls:6785 m2 Wall material type: Concrete block Insulation type: 5cm XPS
ENERGY EFFICIENCY CENTRE GEORGIA
Building Envelope Data
Thickness in
meter λ R U
Internal surface 0,13
Concrete block 0.2 0.56 0.36 Mortar between concrete blocks 0.1 0.88 0.11
XPS 0.05 0.032 1.56 External surface 0.04
2.20 0.45
U value Unit
Baseline 1,468 W/ m 2 o C
Insulated wall 0,45 W/ m 2 o C
Difference 1,018 W/ m 2 o C
ENERGY EFFICIENCY CENTRE GEORGIA
Specific Energy Demand
ENERGY EFFICIENCY CENTRE GEORGIA
Expected Energy and CO2 Savings for improved Building
EE measures Net savings [kWh/yr] Percentages
[%] 1. Thermal insulation of roof 37,482 1.9 2. Thermal insulation of walls 531,292 27.4 3. PVC Windows & Doors 72,493 3.7 4. Thermal insulation of floor 16,772 0.9
5. System with decentalized combination boilers
165,528 8.6
Total 823,568 42.5
CO2 emission reduction per square meter (kg/m2yr) 10.08
Total CO2 emission reduction (t/yr) 153
ENERGY EFFICIENCY CENTRE GEORGIA
3.
Demonstration projects implemented in 2012-2013
Project Sponsor- BP EXPLORATION (Caspian Sea) Ltd. in Georgia and its co-venturers.
Project Implementing partner: Energy Efficiency Center Georgia
ENERGY EFFICIENCY CENTRE GEORGIA
Solar Thermal System in Tbilisi Public School #203
2000 l total capacity solar thermal system consisting of 10 units of 200 l capacity pressurized integrated system made of 70 mm diameter super vacuum tubes, water tank with electric heating element, electronic controller to meter thermal energy
Savings achieved for period September 2012- August 2014
Electricity- 47 691 kWh; Water-5 899 m3 Bill saved- 19415 USD CO2 reduced-14020 kg
ENERGY EFFICIENCY CENTRE GEORGIA
16 (sixteen) individual each with 300 l capacity pressurized split solar thermal systems consisting of 70 mm diameter super vacuum tubes, double-loop 300 l water tank and electric heating element, electronic controller to meter thermal energy output
Solar Thermal System in SOS Tbilisi Children’s Village
Savings achieved for period July 2012- July 2014
Electricity-47 130 kWh; NG-46 144 m3 Water-8 751 m3 Bill saved- 40126 USD CO2 reduced-106502 kg
ENERGY EFFICIENCY CENTRE GEORGIA
Energy Efficiency Measures at Tbilisi Baby House
1.Thermal insulation of roof/attic 2. Replacement of old wooden single glazed windows with low emission double glazing PVC windows and PVC doors 3. Replacement of existing light bulbs with energy efficient ones 4. Construction of Solar Thermal System
Savings achieved for period March 2013- August 2014
Electricity-120592 kWh; NG-49876 m3 Water-3652 m3 Bill saved-42064 USD CO2 reduced-103 tons
ENERGY EFFICIENCY CENTRE GEORGIA
School 203
SOS Village
Baby House
Investments 69205 131908 237253 GEL
Beneficiaries 130 90 158 persons
Annual energy savings 22 842 172886 349363 kWh
Annual water savings 3 127 4247 5234 m3
Annual bill savings 17414 33908 58574 GEL
Annual CO2 reductions 1690 30661 55084 kg
Simple payback 4.0 3.9 4.1 year
ENERGY EFFICIENCY CENTRE GEORGIA
THANK YOU
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