renovation effect on building energy perfornance indicator

Renovation Effect on Building Renovation Effect on Building Energy Perfornance IndicatorEnergy Perfornance Indicator

KTU Institute Of Architecture And Construction

Laboratory Of Building Thermal Physics

dr. Edmundas Monstvilas

The estimation of possible energy saving measures is The estimation of possible energy saving measures is included into the requirements The National Building included into the requirements The National Building Code (Code (NBCNBC) ) Energy Performance Of Buildings. Energy Performance Of Buildings. Certification Of Buildings Energy PerformanceCertification Of Buildings Energy Performance. .

The building energy performance certification client The building energy performance certification client is is givengiven with certificate additionally the with certificate additionally the calculation results of calculation results of possible energy saving measures effect to the improvement possible energy saving measures effect to the improvement of the building energy performance.of the building energy performance. The special The special calculation sub-section is included into The calculation calculation sub-section is included into The calculation program, compiled to the NBC. program, compiled to the NBC.

RENOVATION EFFECTRENOVATION EFFECT ON BUILDING ENERGY ON BUILDING ENERGY PERFORPERFORMMANCE INDICATORANCE INDICATOR

ENERGENERGY PERFORMANCEY PERFORMANCE of of 5 5 Stories,Stories, 3 3 StaircasesStaircases 45 45 Apartment Apartment

BuildingBuildingINPUT DATA INPUT DATA :: Heated areaHeated area 2700 m2; 2700 m2; Window areaWindow area 15 15%% from heated areafrom heated area;; Ventilation naturalVentilation natural;; Domestic hot water supply from substation in Domestic hot water supply from substation in

building with manual control; building with manual control; Temperature control in heating system is absent;Temperature control in heating system is absent; Heat source: district heatingHeat source: district heating ( (manual controlmanual control).).

EnergEnergy performancey performance of of 5 5 Stories,Stories, 3 3 StaircasesStaircases 45 45 Apartment Apartment Building, Building, Existing stateExisting state

SUM ENERGY CONSUMPTION IN BUILDING FOR 1M2 OF HEATED AREA 255,71

BUILDING CLASSIFICATION INDICATOR VALUE 2,25

BUILDING ENERGY PERFORMANCE CLASS E

If energy price is 0,15 Lt/kWh, average heating cost during the heating season is 2,63 Lt/(m2.month.)

Walls; 63,7

Roof; 21,8Ceiling over crawl; 9,1

Windows; 36,3

Thermal bridges; 13,9

Air infiltration; 29,2

THE SAME BUILDING, CHANGED WINDOWS AND DOORS IN THE SAME BUILDING, CHANGED WINDOWS AND DOORS IN ACCORDANCE WITH REQUIREMENTS OF 2006ACCORDANCE WITH REQUIREMENTS OF 2006, ,

WALLS, ROOF AND CEILING OVER BASEMENT WITHOUT INSULATIONWALLS, ROOF AND CEILING OVER BASEMENT WITHOUT INSULATION



BUILDING ENERGY PERFORMANCE CLASS E


Walls 63,7

Roof 21,8

Ceiling over crawl 9,1

Windows 23,2

Thermal bridges 13,9

Air infiltration 4,7

THE SAME BUILDING,INSULATED WALLS AND ROOFTHE SAME BUILDING,INSULATED WALLS AND ROOFIN ACCORDANCE WITH REQUIREMENTS OF 2006IN ACCORDANCE WITH REQUIREMENTS OF 2006, ,

UNCHANGED WINDOWS, CEILING OVER BASEMENT WITHOUT UNCHANGED WINDOWS, CEILING OVER BASEMENT WITHOUT INSULATIONINSULATION



BUILDING ENERGY PERFORMANCE CLASS D

sienos

Walls 10

Roof 4,1


Windows 36,3Thermal

bridges 13,9



THE SAME BUILDING, IN ACCORDANCE WITH THE SAME BUILDING, IN ACCORDANCE WITH REQUIREMENTS OF 2006REQUIREMENTS OF 2006



BUILDING ENERGY PERFORMANCE CLASS B

Walls 10

Roof 4,1

Ceiling over crawl 4,4Windows 23,2

Thermal bridges 3,9



Efficiency of energy saving measures at Efficiency of energy saving measures at implementation in big apartment buildingsimplementation in big apartment buildings

with low energy performancewith low energy performance

MEASURE WITH PARAMETERS IN ACCORDANCE MEASURE WITH PARAMETERS IN ACCORDANCE WITH RECENT REQUIREMENTSWITH RECENT REQUIREMENTS

Savings, Savings,

kWh/(mkWh/(m22. metai). metai)

CHANGE OF WINDOWSCHANGE OF WINDOWS

Energy savings due to improvement of thermal Energy savings due to improvement of thermal insulation insulation 3636,,3-233-23,,22==13,113,1 kWh/(mkWh/(m22. . yearyear)),,

Energy saving due to air infiltration reduction Energy saving due to air infiltration reduction

29,2-4,7 29,2-4,7 ==24,524,5 kWh/(mkWh/(m22. . yearyear))

37,637,6

INSULATION OF WALLS AND ROOF INSULATION OF WALLS AND ROOF

63,7+21,8-10-4,163,7+21,8-10-4,1==71,471,4 kWh/(mkWh/(m22. . yearyear))71,471,4

INSULATION OF CEILING OVER BASEMENTINSULATION OF CEILING OVER BASEMENT

9,1-4,49,1-4,4==4,74,7 kWh/(mkWh/(m22. . yearyear))4,74,7

SUM ENERGY CONSUMPTION IN BUILDING FOR 1M2 OF HEATED AREA BEFORE IMPLEMENTATION 272,58 kWh/(m2.year)

ANALYSIS OF MOST POPULAR ENERGY SAVING ANALYSIS OF MOST POPULAR ENERGY SAVING MEASURES IN MULTI-APARTMENT BUILDINGSMEASURES IN MULTI-APARTMENT BUILDINGS

SUM ENERGY CONSUMPTION IN BUILDING FOR 1M2 OF HEATED AREA, 187,51 kWh/(m2.year)

ANNUAL ENERGY CONSUMPTION FOR HEATING FOR 1M2 OF HEATED AREA, 145,46 kWh/(m2.year)

IF ENERGY PRICE IS 0,15 LT/KWh, AVERAGE HEATING COST DURING THE HEATING SEASON IS 1,82 LT/(M2.MONTH.)

I-I-stst buildingbuilding.. Walls and roof un-insulated. Walls and roof un-insulated. Windows and doors old. Windows and doors old. DHW supply from heat sub-station, DHW supply from heat sub-station, Temperature control in heating Temperature control in heating

systems is absent, systems is absent, Heat supply from district heating Heat supply from district heating

pipelines (manual control)pipelines (manual control)

II-II-dd buildingbuilding.. Walls and roof un-insulated. Walls and roof un-insulated. Windows and doors Windows and doors newnew. . DHW supply from heat sub-station DHW supply from heat sub-station with automatic controlwith automatic control, , temperature control in heating temperature control in heating systems systems for the whole building with for the whole building with thermostatic valves on radiators and thermostatic valves on radiators and outdoor (indoor) temperature outdoor (indoor) temperature sensors,sensors, heat supply from district heating heat supply from district heating pipelines (pipelines (automatic control)automatic control)

SUM ENERGY CONSUMPTION IN BUILDING FOR 1M2 OF HEATED AREA, 255,71 kWh/(m2.year)

ANNUAL ENERGY CONSUMPTION FOR HEATING FOR 1M2 OF HEATED AREA, 209,71 kWh/(m2.year)

IF ENERGY PRICE IS 0,15 LT/KWh, AVERAGE HEATING COST DURING THE HEATING SEASON IS 2,63 LT/(M2.MONTH.)




THE SAME BUILDING, IN ACCORDANCE WITH THE SAME BUILDING, IN ACCORDANCE WITH REQUIREMENTS OF 2006, REQUIREMENTS OF 2006,

All Possible energy saving measures, Without heat pumpAll Possible energy saving measures, Without heat pump

Walls 10,03

Roof 4,1


Windows 17,41


Ventilation 24,04


THE SAME BUILDING, IN ACCORDANCE WITH THE SAME BUILDING, IN ACCORDANCE WITH REQUIREMENTS OF 2006, REQUIREMENTS OF 2006,

All Possible energy saving measures, with heat pumpAll Possible energy saving measures, with heat pump




Walls 10,03

Roof 4,1

Ceiling over basement

4,36

Windows 17,41


Ventilation 24


Energy performance class and energy Energy performance class and energy consumption level in respect to applied energy consumption level in respect to applied energy

saving measuressaving measures

81,74

85,71

102,32

165,66

210,58

255,71

0 50 100 150 200 250 300

B-0,70, Heat pump and requirements of2006

B-0,73, Ideal building, requirements of2006

B-0,89, Middle quality building,requirements of 2006

D-1,58, Existing building, insulated roofand walls

E-2,02, Existing building, changedwindows and doors

E-2,25, Existing building, quality of 1192

SUM ENERGY CONSUMPTION IN BUILDING FOR 1M2 OF HEATED AREA

sienos

Walls 10

Roof 4,1


Windows 36,3Thermal

bridges 13,9


Walls 25,7

Roof 17,4

Floor on ground 21,4

Windows 30,2


Air infiltration 30,5SUM ENERGY CONSUMPTION IN BUILDING

FOR 1M2 OF HEATED AREA 166,31



COMPARISON OF THE ENERGY PERFORMACE INDICES COMPARISON OF THE ENERGY PERFORMACE INDICES FOR FAMILY AND APARTMENT BUILDINGSFOR FAMILY AND APARTMENT BUILDINGS

Under requirements of 2006Under requirements of 2006

Family house, heated area: 175 m2

Apartment building, heated area: 2700 m2

SUM ENERGY CONSUMPTION IN BUILDING FOR 1M2 OF HEATED AREA 102.32



Annual heat losses for 1m2 of envelope area 37,74 kWh/(m2.year).

If energy price 0,15 Lt/kWh, average heating cost during heating season 1,78 Lt/(m2.month.)

Annual heat losses for 1m2 of envelope area 37,74 kWh/(m2.year).

If energy price 0,15 Lt/kWh, average heating cost during heating season 1,78 Lt/(m2.month.)

Apartment building of 2700 m2 heated area. Existing state. Energy consumption for heating at different average indoor temperature

119,66

164,68

132,15

158,00

183,85

209,71

0,00 50,00 100,00 150,00 200,00 250,00

Insulated roof and walls, average indoor temperature20C

Changed windows and doors, vidutinė patalpųtemperatūra žiemą 20C

Nerenovuotas pastatas, average indoor temperature14C

Existing state, average indoor temperature16C

Existing state, average indoor temperature 18C

Existing state, average indoor temperature 20C

Energy consumption for heating, kWh/(m2. year)

Apartment building of 2700 m2 heated area, built up to1992. New windows and doors, U-value 1,6 . Energy consumption for heating at different

average indoor temperature

101,94

122,85

143,76

164,68

0,00 20,00 40,00 60,00 80,00 100,00 120,00 140,00 160,00 180,00

Average indoortemperature 14C





ENERGY CONSUMPTION FOR HEATING IN DEPENDENCE TO INDOOR TEMPERATURE

Apartment building of 2700 m2 heated area, built up to1992. Insulated roof and walls. Energy consumption for heating at different average indoor

temperature

69,95

86,52

103,09

119,66

0,00 20,00 40,00 60,00 80,00 100,00 120,00 140,00






Real energy savings are closely related to the indoor climate conditions before renovation.

The values indicated in the certificate as energy savings may be not achieved after the implementation.


Apartment building of 2700 m2 heated area. Energy consumption for heating at different average indoor temperature

30,21

56,06

81,92

107,77

9,30

35,15

61,00

86,86

11,62-

14,24

40,09

65,94

32,53-

6,68-

19,18

45,03

-40 -20 0 20 40 60 80 100 120

14C / 14C

16C / 14C

18C / 14C

20C / 14C

14C / 16C

16C / 16C

18C / 16C

20C / 16C

14C / 18C

16C / 18C

18C / 18C

20C / 18C

14C / 20C

16C / 20C

18C / 20C

20C / 20C

Saved energy, kWh/(m2. year)

Existing state /New windows

and doors


Apartment building of 2700 m2 heated area. Energy consumption for heating at different average indoor temperature

62,19

88,05

113,90

139,75

45,62

71,48

97,33

123,18

29,05

54,91

80,76

106,61

12,48

38,34

64,19

90,04

0 20 40 60 80 100 120 140 160

14C / 14C

16C / 14C

18C / 14C

20C / 14C

14C / 16C

16C / 16C

18C / 16C

20C / 16C

14C / 18C

16C / 18C

18C / 18C

20C / 18C

14C / 20C

16C / 20C

18C / 20C

20C / 20C

Saved energy, kWh/(m2. year)

Insulated roof and walls

Existing state /

Better insulation of roof and walls in big apartment Better insulation of roof and walls in big apartment buildings provides significant energy savings, as well as buildings provides significant energy savings, as well as energy performance indicator value growth up by the energy performance indicator value growth up by the class. class.

Impact of better windows and door in energy Impact of better windows and door in energy performance is less significant, in most of cases this performance is less significant, in most of cases this measure do not change the energy performance class of measure do not change the energy performance class of the building, both for family houses or apartment the building, both for family houses or apartment buildings. buildings.

The designers and investors shall be immediately The designers and investors shall be immediately introduced to the energy performance certification and introduced to the energy performance certification and the impact of various energy saving measures on energy the impact of various energy saving measures on energy consumption. consumption.

ENERGY PERFORMANCE CLASS AND ENERGY ENERGY PERFORMANCE CLASS AND ENERGY CONSUMPTION LEVELCONSUMPTION LEVEL

Thanks for attention !

renovation effect on building energy perfornance indicator

Documents