Energy certification for interior lighting

Transcription

1 Energy certification for interior lighting dr.ing. Dorin BEU Lihgting Engeneering Laboratory Technical University of Cluj Napoca Romanian Green Building Council Transylvania Branch

2 Motto You can not improve what you can not measure! Lord Kelvin

3 Lighting in schools

4 Lighting in schools

5 Introduction The EU Standard EN15193, adopted by Romania in 2008, defines the energetic requirements for lighting. A new term, LENI is introduced, expressed in kwh/sqm/yr, also, among other things, lighting energy consumption metering. Calculating LENI in the design stage starts with various hypotheses, which influence the final outcome. The Standard stresses the importance of natural lighting and provides calculation methods.

6 The increasing importance of natural lighting Direct impact on the number of hours utilising electrical lighting Clear references to the calculation methods Increase in energy savings utilising natural lighting The necessity for control automation in electrical lighting

7 The Energy consumption for lighting LENI LENI Lighting Energy Numeric Indicator The Standard EN15193 provides specification for the calculation and measurement of lighting electrical energy consumption. The unit of measurement is KWh per m 2 and yr. Calculating LENI: Lighting Energy Numeric Indicator as seen in EN 15193: LENI = Energy requirements for lighting Square meters Year [kwh/m²yr]

8 Calculation of energy consumption LENI = Lighting Energy Numeric Indicator [kwh/m²a] According to EN LENI = P n x t x F d x F o x F c Ex. 12 x 2500 x 0,7 x 0,8 x 0,9 P n = Installed Power [kw/m 2 ] t = Utilisation time [h/a] F d F o F c factor = Natural lighting availability = Occupation Factor = Constant lighting factor Energy Energia Consumption utilizată = = 15,12 kwh/m kwh/m 2 a 2 a 11

9 Savings potential Lamp Auxilliary Eqpm. Lighting Equipment Lighting Management Lighting Concept

10 Lamp Potential Lamp Auxilliary Eqpm. Lighting Equipment Lighting Management Lighting Concept Tip lampă Fluorescent Lamp: lm/w Metallic Halide: Sodium: lm/w lm/w Compact fluorescent: Incandescent: Halogen: lm/w 9-16 lm/w lm/w White LED: lm/w

11 Potențial ap. auxiliară Balast electronic Lamp Auxilliary Eqpm Lighting Eqpm Lighting Management Lighting Concept Installed Power on balast - reduction up to 50% Up to 50% increase in life-span Comfort criteria: Instant ignition, without flickering Automatic extinguishing of damaged lamps Possible bus communication (for DALI balasts)

12 Potențial aparate de iluminat Lamp Auxilliary Eqpm Lighting Eqpm Lighting Management Lighting Concept Silver coated reflector LED Microprisms 80% increase in efficiency 85% yeald

13 The Components of Efficient Lighting Efficient Lamps Efficient Auxilliary Equipment Intelligent Controls Use of Natural Light Savings Potential Optimised Lighting Equipment Energy Certificate

14 ENERGETIC EFFICIENCY Das LENI Gehirn calculation tables 14

15 ENERGETIC EFFICIENCY Austrian Norm ÖNORM H5059 for EN

16 ENERGETIC EFFICIENCY Energieeffizienz specifications for public buildings of the Niederostereich region Lighting 16

17 ENERGETIC EFFICIENCY Energieeffizienz specifications for public buildings of the Niederostereich region 17

18 Advantages - Clear and simple evaluation criteria - Target values for design engineers - Measurable post-rehabilitation values - Full reconstruction of electrical system - Lighting controls automation - Contracters can only be specialised companies

19 Disadvantages - Existing lighting 100 lx, according to new standards 300 lx - Lack of experience in design, execution and exploitation - A larger initial investment (by 10-20%)

20 Final Advantage - Reduction of energy consumption to 1/3 of current levels!!! - Much lower maintenance costs (lamp life span: incandescent 1.000h, fluorescent h, LED over h) -Clear savings evaluation kwh/mp/an -Strategy for the future

21 Case Study: The Cacica Eco-Library

22 Cacica Eco-Library 1 st option Suspended lighting, 2 T16 49W lamps, electronic balast LENI = 29,81kWh/ m 2 /yr 2 nd option Embedded lighting using 36W LED s LENI = 9,90kWh/ m 2 /yr RoGBC project to design a building certified by Living Building Challenge