13990389 Hotel Engineering Training Lighting System

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  • 1. Jl. Jl Tukad Batanghari VIII/7A – Denpasar – Bali – Indonesia Tel: (62) 361 7910518 Fax: (62) 361 7910518Lighting Systems Drs. Agustinus Agus Purwanto, MM
  • 2. Basic lighting terms Visible light ROY G BIV Color rendition Lumen Illumination Footcandles
  • 3. Light sources Natural light (sunlight) – inexpensive and can contribute much to overall lighting needs – drawbacks solar heat gain glare fading and physical deterioration of fabrics Common artificial light sources – incandescent l i d t lamps – electric discharge lamps
  • 4. Incandescent lamps Advantages – instant starting and restarting – low in cost – good color rendition Disadvantages – short lifetime – poor efficiency – high operating cost – adds heat to building Types – Conventional – rough service or vibration – Tungsten – reflector
  • 5. Electric discharge lamps Advantages – longer lifetimes – higher efficiency – low operating cost Disadvantages g – slow starting and restarting – higher cost – poorer color rendition Types – Fluorescent – mercury vapor – metal halide – high- and low-pressure sodium
  • 6. Lighting system design elements Light levels – determined by the tasks or activities that will take place within a space – light levels measured by portable light meters; Illuminating Engineers Society, Illuminating Society Engineering Society of North America, and the American Society of Heating, Refrigerating and Air-Conditioning Engineers recommend minimum g g light levels – building area method vs. space-by-space method – dimming controls
  • 7. Lighting system design elements Luminaires – Components C t Lamps lamp sockets ballasts (for electric discharge lamps) reflective material lenses or louvers Housing – visual comfort probability – coefficient of utilization
  • 8. Lighting system design elements Color rendition – color of light affects appearance of surfaces, finishes, furnishings, etc. – color rendering i d l d i index Safety – lighting system must comply with local safety codes – all luminaires need adequate ventilation, clearance, and proper wattage – acryllic diffuser or tube safety shield for some lamps in some locations (kitchens, for example) – insufficient light – glare – widely varying light levels can be hazards Emergency lighting – must comply with local codes, which are often based on the Life Safety Code and the National Electrical Code – a delay of no more than ten seconds is permitted – exit signs
  • 9. Lighting system maintenance Cleaning – replace HVAC filters to cut down on dust – semi-annual cleaning – destaticization Replacement p – incandescent lamps replaced more often than fluorescents – lumen depreciation – group replacement vs. replacement upon burnout – old lamps and ballasts must be disposed of properly – recycling of fluorescent lamps and ballasts available in some areas
  • 10. Conservation opportunities Efficient lighting Control operating hours Replace incandescents with fluorescents when possible p Turn off lights when not needed EMS methods – Microprocessors/computer systems Mi / t t – photocell control – ultrasonic or infrared sensors – twist timers