energy certification for interior lighting - eap.grip2013.eap.gr/pdf/ro_beu_part1-3.pdf · energy...
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Energy certification for interior lighting
dr.ing. Dorin BEU
Lihgting Engeneering Laboratory
Technical University of Cluj Napoca
Romanian Green Building Council –
Transylvania Branch
Motto
You can not improve what you can not measure!
Lord Kelvin
Lighting in schools
Lighting in schools
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.
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
The Energy consumption for lighting
LENI
The Standard EN15193 provides
specification for the calculation and
measurement of lighting electrical
energy consumption.
The unit of measurement is KWh per
m2 and yr.
Calculating LENI: Lighting Energy Numeric Indicator as seen in EN
15193:
LENI = Energy requirements for lighting
Square meters Year
[kWh/m²yr]
LENI Lighting Energy Numeric Indicator
11
Calculation of energy consumption
Energia utilizată = 30 kWh/m2a Energia utilizată = 20 kWh/m2a Energy Consumption = 15,12 kWh/m2a
LENI = Lighting Energy Numeric Indicator [kWh/m²a]
According to EN15193.
Pn = Installed Power [kW/m2]
t = Utilisation time [h/a]
Fd = Natural lighting availability
factor
Fo = Occupation Factor
Fc = Constant lighting factor
LENI = Pn x t x Fd x Fo x Fc
Ex. 12 x 2500 x 0,7 x 0,8 x 0,9
Lamp Lighting
Equipment
Lighting
Management Lighting Concept Auxilliary Eqpm.
Savings potential
Glühlampen: 9-16 lm/W
Fluorescent Lamp: 85-95 lm/W
Metallic Halide: 63-95 lm/W
Sodium: 37-137 lm/W
Compact fluorescent: 50-76 lm/W
Incandescent: 9 - 16 lm/W
Halogen: 10-22 lm/W
White LED: 100-165 lm/W
Tip lampă
Lamp Lighting
Equipment
Lighting
Management Lighting Concept Auxilliary Eqpm.
Lamp Potential
Potențial ap. auxiliară
Balast electronic
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)
Lamp Lighting
Eqpm
Lighting
Management Lighting Concept Auxilliary Eqpm
Potențial aparate de iluminat
Silver coated reflector LED Microprisms
80% increase in efficiency 85% yeald
Lamp Lighting
Eqpm
Lighting
Management Lighting Concept Auxilliary Eqpm
The Components of Efficient Lighting
Savings Potential Use of Natural Light
Efficient Auxilliary
Equipment Efficient Lamps Intelligent Controls
Optimised Lighting
Equipment
Energy Certificate
16
„Energieeffizienz“ specifications for public buildings of the Niederostereich region
Lighting
ENERGETIC EFFICIENCY
17
„Energieeffizienz“ specifications for public buildings of the Niederostereich region
ENERGETIC EFFICIENCY
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
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%)
Final Advantage
- Reduction of energy consumption to 1/3 of current levels!!!
- Much lower maintenance costs (lamp life span:
incandescent 1.000h, fluorescent 15.000h, LED – over
50.000h)
-Clear savings evaluation kWh/mp/an
-Strategy for the future
Cacica Eco-Library
1st option
Suspended lighting, 2 T16 49W
lamps, electronic balast
LENI = 29,81kWh/ m2 /yr
2nd option
Embedded lighting using 36W
LED’s
LENI = 9,90kWh/ m2 /yr
RoGBC project to design a building certified by Living Building Challenge