Energy Performance of Currently Constructed Residential Buildings …€¦ · Energy Performance of...

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


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]


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]


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


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


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


Specific Energy Demand


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


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


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


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 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


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


THANK YOU

Energy Performance of Currently Constructed Residential Buildings …€¦ · Energy Performance of...

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