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Renovation Effect on Building Energy Perfornance Indicator

KTU Institut e Of Architecture And Construction Laborator y Of Building Thermal Physics. Renovation Effect on Building Energy Perfornance Indicator. dr. Edmundas Monstvilas. RENOVATION EFFECT ON BUILDING ENERGY PERFOR M ANCE INDICATOR.

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Renovation Effect on Building Energy Perfornance Indicator

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  1. KTU Institute Of Architecture And Construction Laboratory Of Building Thermal Physics Renovation Effect on Building Energy Perfornance Indicator dr. Edmundas Monstvilas

  2. RENOVATION EFFECTON BUILDING ENERGY PERFORMANCE INDICATOR • The estimation of possible energy saving measures is included into the requirements The National Building Code (NBC) Energy Performance Of Buildings. Certification Of Buildings Energy Performance. • The building energy performance certification client is given with certificate additionally the calculation results of possible energy saving measures effect to the improvement of the building energy performance. The special calculation sub-section is included into The calculation program, compiled to the NBC.

  3. ENERGY PERFORMANCEof 5 Stories, 3 Staircases 45 Apartment Building INPUT DATA : • Heated area 2700 m2; • Window area 15%from heated area; • Ventilation natural; • Domestic hot water supply from substation in building with manual control; • Temperature control in heating system is absent; • Heat source: district heating (manual control).

  4. Energy performanceof 5 Stories, 3 Staircases 45 Apartment Building, Existing state If energy price is 0,15 Lt/kWh, average heating costduring the heating season is 2,63 Lt/(m2.month.)

  5. THE SAME BUILDING, CHANGED WINDOWS AND DOORS IN ACCORDANCE WITH REQUIREMENTS OF 2006, WALLS, ROOF AND CEILING OVER BASEMENT WITHOUT INSULATION If energy price is 0,15 Lt/kWh, average heating costduring the heating season is 2,06 Lt/(m2.month.)

  6. THE SAME BUILDING,INSULATED WALLS AND ROOFIN ACCORDANCE WITH REQUIREMENTS OF 2006, UNCHANGED WINDOWS, CEILING OVER BASEMENT WITHOUT INSULATION If energy price is 0,15 Lt/kWh, average heating costduring the heating season is 1,65 Lt/(m2.month.)

  7. THE SAME BUILDING, IN ACCORDANCE WITH REQUIREMENTS OF 2006 If energy price is 0,15 Lt/kWh, average heating costduring the heating season is 0,71 Lt/(m2.month.)

  8. Efficiency of energy saving measures at implementation in big apartment buildingswith low energy performance SUM ENERGY CONSUMPTION IN BUILDING FOR 1M2 OF HEATED AREA BEFORE IMPLEMENTATION 272,58 kWh/(m2.year)

  9. ANALYSIS OF MOST POPULAR ENERGY SAVING MEASURES IN MULTI-APARTMENT BUILDINGS • I-stbuilding. • Walls and roof un-insulated. • Windows and doors old. • DHW supply from heat sub-station, • Temperature control in heating systems is absent, • Heat supply from district heating pipelines (manual control) • II-dbuilding. • Walls and roof un-insulated. • Windows and doors new. • DHW supply from heat sub-station with automatic control, • temperature control in heating systems for the whole building with thermostatic valves on radiators and outdoor (indoor) temperature sensors, • heat supply from district heating pipelines (automatic control)

  10. THE SAME BUILDING, IN ACCORDANCE WITH REQUIREMENTS OF 2006, All Possible energy saving measures, Without heat pump If energy price is 0,15 Lt/kWh, average heating costduring the heating season is 0,55 Lt/(m2.month.)

  11. THE SAME BUILDING, IN ACCORDANCE WITH REQUIREMENTS OF 2006, All Possible energy saving measures, with heat pump If energy price is 0,15 Lt/kWh, average heating costduring the heating season is 0,50 Lt/(m2.month.)

  12. Energy performance class and energy consumption level in respect to applied energy saving measures

  13. COMPARISON OF THE ENERGY PERFORMACE INDICES FOR FAMILY AND APARTMENT BUILDINGSUnder requirements of 2006 Family house,heated area: 175 m2 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 season1,78 Lt/(m2.month.) Apartment building,heated area: 2700 m2 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 season1,78 Lt/(m2.month.)

  14. ENERGY CONSUMPTION FOR HEATING IN DEPENDENCE TO INDOOR TEMPERATURE 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.

  15. ENERGY CONSUMPTION FOR HEATING IN DEPENDENCE TO INDOOR TEMPERATURE

  16. ENERGY CONSUMPTION FOR HEATING IN DEPENDENCE TO INDOOR TEMPERATURE

  17. ENERGY PERFORMANCE CLASS AND ENERGY CONSUMPTION LEVEL • Better insulation of roof and walls in big apartment buildings provides significant energy savings, as well as energy performance indicator value growth up by the class. • Impact of better windows and door in energy performance is less significant, in most of cases this measure do not change the energy performance class of the building, both for family houses or apartment buildings. • The designers and investors shall be immediately introduced to the energy performance certification and the impact of various energy saving measures on energy consumption. Thanks for attention !

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