Webinar. Using lighting technologies to reduce your energy bill. Presenter Brendan Reid. Host Lindsay Teale

Transcription

1 Webinar Using lighting technologies to reduce your energy bill Presenter Brendan Reid Host Lindsay Teale

2 #RESWebinar

3 Webinar aim This webinar will show you how to reduce your energy bill by taking advantage of the latest lighting automation and lamp technologies.

4 Understanding your current energy use, data and costs for lighting

5 Poll

6 Understanding the units Electricity consumption is measured in kwh kilowatt-hours A kwh is an amount of electricity A kilowatt-hour is 1000 watts running for an hour The cost of a kwh varies A 1-bar electric fire uses 1kW Running for an hour it uses 1kWh Assuming 13p per kwh = 13p per hour 10 lamps each using 100Watts will together use 1kW Assuming 13p per kwh = 13p per hour

7 Two approaches to estimating energy use for lighting 1. TOP-DOWN APPROACH Look at electricity bill(s) Arrive at an annual consumption figure (net of standing charges) Estimate proportion of energy used for lighting and apply to bill 2. BOTTOM-UP APPROACH Identify all lamp types (interior and exterior) Count numbers of each lamp type in each location Estimate running hours per day of each location, and days per year Calculate total energy used for lighting

8 Top-Down Approach: For any one building with one meter FORMULA TOTAL ELECTRICITY USE PER ANNUM LESS PROCESS USE LESS HEATING USE = NET ELECTRICITY USE X 50% = ROUGH ESTIMATE OF TOTAL ENERGY USE FOR LIGHTING EXAMPLE 36,687kWh X 12 = 440,244kWhpa LESS 0 LESS 230,000 = 210,244 X 50% =^= 100,000kWhpa = 13k at 13p/kWh

9 Estimating the cost of lighting: free lighting cost calculator Available online: (add URL)

10 Poll

11 Lighting control strategies

12 Making the most of natural light 1. Ensure windows are clean 2. Remove furniture or other obstructions 3. Mount blinds above or to the side to avoid obstructing the light 4. Locate desks near windows but consider glare

13 Lighting control In a commercial environment noone has clear responsibility for lighting control More energy is often saved through improved control than through lamp replacement

14 Lighting control Presence detection Timer Daylight sensor (photocell)

15 Lighting control: presence detection Passive Infra- Red (PIR) PIR with manual override Microwave

16 Lighting control: presence detection Ideal for intermittently occupied areas such as: WCs Store rooms Corridors Meeting rooms Common mistake: setting the controls too short in WCs

17 Lighting control: daylight sensors (photocells) Most commonly used at present in exterior locations No reason why it shouldn t be used internally Requires appropriate zoning of lights

18 Lighting control: daylight sensors (photocells) Zoning lights Lights parallel to windows: Sensor Lights deeper in room: No sensor This room requires 3 zones the daylight varies throughout the day

19 Lighting control: worked example WC Lighting in a single-shift factory Present situation: the first person in switched on the lights and they are switched off at the end of the day by the security guard. Operating 10 hours per day, 5 days per week, 50 weeks per year. 20 employees visiting 1 facility on average 2.5 times per day. Existing Number of halogen lamps 8 Wattage 50W Total wattage 400W Operating hours per annum 2,500 Total kwhpa 1,000 Annual Cost at 13p/kWh 130 SAVING New

20 Lighting control: worked example WC Lighting in a single-shift factory Present situation: the first person in switched on the lights and they are switched off at the end of the day by the security guard. Operating 10 hours per day, 5 days per week, 50 weeks per year. 20 employees visiting 1 facility on average 2.5 times per day. Improvement measure: introduce PIR control Existing Number of halogen lamps 8 8 New Wattage 50W 50W (no change) Total wattage 400W 400W Operating hours per annum 2, (visits) x 5/60 x 5 x 50 = 1041 Total kwhpa 1, Annual Cost at 13p/kWh SAVING 76 per annum

21 #RESWebinar

22 Poll

23 Lamp replacement

24 Lamp replacement

25 Lamp replacement Before you start: Ensure that lighting is sufficient for the tasks being performed this is a good time to increase lux levels if required. Look for any areas which could be over-lit. Lower levels of light in corridors can be restful as long as they are safe. (Check with your H&S officer) Street lighting 5-15 lux Corridors 150 lux Warehouses 150 lux Offices lux Inspection areas 500 lux Outside (overcast) 5000 lux Outside (full sun) >30,000 lux

26 Lamp replacement: Incandescent / tungsten lamps (GLS) Eco Halogen Tungsten filament or CFL or LED The answer depends on your investment horizons. LEDs cost much more than CFLs or Eco Halogens so require greater capital outlay and take longer to repay the investment, but last longer and will lead to a reduced maintenance bill and less disruption. The payback period also depends on your run hours per annum.

27 Lamp replacement: fluorescent lighting T12 40 W T5 28W or LED 11W The answer depends on your investment horizons. LEDs cost much more than T5s so require greater capital outlay and take longer to repay the investment, but last longer and will lead to a reduced maintenance bill and less disruption. The payback period also depends on your run hours per annum.

28 Lamp replacement: halogens Eco-Halogen 35W GU10 50W or LED 4W Again, the answer depends on your investment horizons. LEDs cost more than Eco Halogens so require greater capital outlay and take longer to repay the investment, but LEDs last longer so could produce a higher net saving in the long run. The payback period also depends on your run hours per annum.

29 Lamp replacement: What s happening with LEDs? Jersey last week An entire shop dedicated to LEDs

30 Lamp replacement: What s happening with LEDs? 90% may be an overestimation but it might take into account longevity... But a significant step forward in technology. Other environmental impacts lower (Mercury in CFLs)

31 Lamp replacement: What s happening with LEDs? Conservation Lighting Colour temperatures have been sorted out. Prices are falling Conservation ranges available Efficiencies are rising See: National Trust Scotland Historic Scotland (Edinburgh Castle) English Heritage

32 Lamp replacement: What s happening with LEDs? High Bay Lighting

33 Lamp replacement: All or Part? Do I replace all my lamps in one go or wait until they fail? To discard a working lamp results in a wasted asset Resource efficiency is about more than just energy use and carbon emissions The answer depends on a number of factors: Difficulty of accessing lamps (if access equipment is needed then it makes sense to replace all the lamps in a selected area) Length of run time per day Investment horizons Availability of cash

34 Poll

35 Building the business case

36 Building the business case Two questions from your finance department/boss/md: 1.How much is all this going to cost us? 2.When do we get our money back? And the other questions they should be asking: 1. Any other H&S considerations 2. Any other benefits?

37 Building the business case 1. How much is all this going to cost us? a) Rough estimate pricebooks on the internet, SPONS b) Quotes from contractors or suppliers Be aware: When looking at lighting control options, everything is context dependent: - accessibility of wiring - access to site So it is safest to get firm quotes where any electrical work is involved

38 Building the business case 2. When do we get our money back? PAYBACK INTERNAL RATE OF RETURN NET PRESENT VALUE

39 Building the business case: payback Simple Payback Period: The amount of time in years that it takes for an investment to be repaid by the savings it achieves Ignores maintenance costs Ignores savings through improved longevity (as long as the payback period is less than the expected life of the equipment)

40 Building the business case: payback Simple Payback Period = Savings achieved per annum Cost of measure = X Years

41 Building the business case: worked example WC Lighting in a single-shift factory Improvement measure: introduce PIR control Existing New Number of lamps 8 8 Wattage 50W 50W (no change) Total wattage 400W 400W Operating hours x 5/60 x 5 x 50 = 1041 Annual Cost at 13p/kWh SAVING 76 per annum Cost of PIR Fitted Payback period 76 / 70 1 Year 1 month

42 Building the business case: summary Rationale Description of the measure Costs including quotes Payback Any other benefits Any H&S considerations

43 Case study: SCVO Estimated annual cost savings of 1,175 and payback of 3.5 years by upgrading to LED lighting. Associated CO 2 emissions reduced by over 6 tonnes. Additional benefits include reduced purchasing costs, maintenance costs, staff disruption and waste disposal costs. We are determined to reduce our energy use and hope the measures we take will encourage our members to follow suit. Tilly Sheridan Facilities Coordinator, SCVO

44 Case study: Turnberry Resort Saved 12,000/year by upgrading to LED lighting. Fitted water saving devices. Improved waste management practices. Set up a Green Council. We are amazed at the cost savings and other benefits that have been achieved by updating our lighting systems and making relatively simple, low-cost changes in other areas. Naveed Rasool Welfare and Environmental Executive, Turnberry Resort

45 Case study: Think Fitness 4 less Heating costs reduced by 8,500/year. Savings of 3,300/year by installing LED lighting. Annual water costs reduced by 700. Installing hand driers reduced paper towel use by 70%. Who would have thought that a company of our size could make savings of over 12,000 so easily? I would encourage all businesses to look at their resource use as a great way of saving money. Greg Dalgleish Co-owner & Fitness Manager Think Fitness 4 Less

46 Case study: Merson Group Annual cost saving potential of 12,700 by replacing high-intensity discharge lamps with dimmable LED lamps. Installing occupancy sensors and using zoning in offices reduces annual lighting costs by an estimated 1,150. Associated CO2 emissions reduced by 80 tonnes. The free, independent advice we received has given us the confidence to go ahead and improve our lighting systems in the sure knowledge that we will significantly reduce our operating costs. Joe Chaney Safety, Health, Environment and Quality Manager, Merson Group

47 How to carry out a successful lighting replacement project - 6 step guide 1. Understand project parameters 2. Define your requirements 3. Find potential suppliers and contractors 4. Working with suppliers during the bid process 5. Quotation review 6. Get funding

48 Advice and support We provide free, specialist advice and one-to-one support to help decision makers in business, public and third-sector organisations cut their energy, water and raw material costs

49 E-LEARNING Green Champions Training Fee online training for your environmental team Bite sized modules teach latest resource efficiency knowledge and practice Certificate on completion Ideal lunchtime learning 'Great course for businesses that want to learn about resource efficiency at their own pace. I highly recommend this course Seamus Corry Assistant Manager Cloybank

50 #RESWebinar

51 Thank you