PRESENTATION
ROADMAP
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Electrical
Air Conditioning
Landscaping
Waste Management
Some basic rules
1. Installation of Power Factor Correction
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Reduce Maximum Demand
Weekly inspection of substations in order to identify possible problems.
Spent R180k in 2008 – Payback ± 2 years
Spent R80k in 2009 – Payback ± 3 years
2. Review of Electrical tariffs
• A saving of ± R150 000/month due to tariff changes
3.Air Conditioning controls
 Change operating times according to seasons and outside weather conditions
- Immediate results of R50k/month
 Control of chilled water temperature – between 6 and 9 degrees. Control
chilled water temperature versus cooling & then reheating
 Currently installing additional controls.
 Installation of timers of split / console units.
4.Install efficient lighting & control system
 Reduce consumption & Demand
 Phase 1, 2008, R3 459 958, Installation of energy efficient lighting and control
system. Pay back period on 2008 tariffs – 2.5 Years
 Current project, Phase 2- R2 426 263.93; pay back period of 4.7 years @
2009 tariff. Installation of more efficient lighting as well as upgrade of lighting
levels.
 Install more efficient light fittings and lamps
 Install / upgrade control system
 Reduced maintenance costs – longer life lamps, bulk replacement with
guarantees, etc.
 TENANT : Uwe Koeter Jeweller, gone Green - Average Kw consumption was
1,450 before Refurbishment. With new LED lighting average consumption is
780
 Assisting tenants with lighting design
Original 50W low voltage
downlighter
New 1W LED cone
downlighter
After:
•3 x 1W LED cone downlighters
•Total : 3W
•Lamp life of 50 000 hours
Before:
• 3 x 50W low voltage downlighters
•Total : 150W •Lamp life ± 1000 hours
Before and After light levels. Original 50W low voltage
downlighter
Original 2 x 13W compact fluorescent downlighter
New 2 x 26W compact
fluorescent downlighter
New 1W LED cone
downlighter
Before:
•50W low voltage downlighters
•2 x 13W compact fluorescents
•Total = 1 708 W
After:
•1W LED cone downlighters
•2 x 26W compact fluorescents
•Total = 446 W
Original 50W low voltage downlighter
Original 2 x 13W compact fluorescent downlighter
Before:
•50W low voltage downlighters
•2 x 13W compact fluorescents
•Total : = (33 x 50) + (10 x 26) = 1650W + 260W = 1 910 W
New 1W LED Cone downlighter
New 2 x 26W compact fluorescent downlighter
After:
•1w LED cone downlighters
•2 x 26W compact fluorescents
•Total : = (33 x 1) + (10 x 54) = 33W + 520W = 531 W
Before
Removal of 103 x 58W fluorescents at upper cove level = Saving of 5 974 W or
R 15 786/year
Before:
2 x 58W fittings ‐ 24 fittings
Total load = 2 784 W
After:
2 x 58W ‐ 11 fittings
13 fittings removed
New load= 1 276 W
After
Before:
2 x 58W 15 fittings
Total = 1 740 W
After:
2 x 58W parking fittings 8 fittings
7 fittings removed
New load= 928 W
Current Project – R13 Million – Complete
Nov 2009.
•Replace 4 X screw chillers with 2 X Centrifugal
chillers - 25% saving in electricity or R50 000/month
•Part of normal end of life replacement
•Improve controls and introduce more fresh air
control
•Moving from a constant volume to variable volume
system – Variable speed drives on Air handling
units, Variable volume diffusers
This is a first generation Chiller with a low
co-efficient of performance (COP of 4).
Installing new centrifugal Chillers with COP
of 7. This will lead to significant electricity
saving.
This is an existing Cooling
Tower System as used in
most buildings with central air
conditioning system.
Moving towards the seawater cooling,
which will result in 9000 kilo litres of
water saved per month, or R62,550
saved per month or R750k/year
Plant Room
No. 1
Plant Room
No. 2
• Currently we have independent Chiller Plant Rooms.
• We are moving to a District Cooling philosophy.
• This will also lead to significant energy savings.
• Reduces overall redundancy & improves flexibility
Cleaning of Filters & Coils of Air
Handling Units:
•Improves air flow
•Reduces power consumption
•V&A now uses ISO 14001 rated
chemicals and not harmful acids.
•Improves lifespan of equipment
•Installing VSD & economy cycle
WATER SAVING INITIATIVES
 Irrigation system is two fold-spray and drip irrigation.
 Currently 80% spray and 20% drip. 2008: 90% spray & 10% drip.
 30% drip by end of December 2009.
 Future 70% drip 30% spray. Why 30% spray? Not all areas can be converted into drip
as most plants, trees and hedges are fully grown.
 Reduced watering times: 2008 - 20 Minutes, whereas 2009 – 10 Minute cycles
DRIP vs. SPRAY IRRIGATION
 Drip irrigation @ R50/m² vs spray irrigation @ R25/m²
 Spray irrigation system can easily be converted into a drip irrigation system.
 Drip Irrigation results in: less water usage, reduced weed growth & pest problems
 Spray irrigation 25 litres / 10m² vs. 10 litres /10m² for Drip irrigation
 Reduced watering time = less water consumed, as wind does dot blow the spray of water
away.
TOTAL LANDCAPED AREAS
 The total landscaped area = 20,200 m² (grass and flower beds)
 Total area converted to drip irrigation = 4,080 m² (08/09)
 Total area to be converted = 16,120 m²
 Total area converted to drip irrigation = 20,2%
 By December 2009 we should achieve a 30% drip irrigation conversion.
LANDSCAPING:
•R320 000 (2008) – due to water isolation during winter
•R330,618 (2009) – due to water isolation during winter
•R18k/month - drip irrigation or R216/year
ELECTRICAL:
•Phase 1: R60 000/month - Energy efficient lamps & Control system
•Phase 2: R32 260/month – Energy efficient lamps
•Tariff changes – R150k/month or R1.8Million/year
•R200 000 – reuse of excess fittings in other buildings
AIR CONDITIONING:
•Use of sea water for cooling – R68 000/month or R816k/year
•Improved controls – R50 000/month or R600k/year
•More efficient chillers – R50 000/month or R600k/year
TOTAL ANNUAL SAVINGS: ± R5.47Million
Cleaning:
 Most of our Chemicals & cleaning products used on site are
ISO14001 compliant. – No Cost Implication.
Waste Management
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All fluorescent tubes disposed of as hazardous waste.
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Appointed Wasteman and waste recycling program implented
during November. R50k/month guarantee payback on recycled material.
 Currently ordering new waste bins in order to recycle at source.
 Legislation moving towards making the producer of the waste
responsible.
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Shortage of landfill space – within next 3 years the current landfill
sites in Cape Town will be at capacity.
 Supply of paints was tendered, and contract awarded on the
basis of price and VOC (volatile organic compounds) content.
SOME BASIS RULES:
• Make utility management part of staffs’ KPA’s
• Set the example
• Don’t try to do all at once, but have a plan,
• Base your actions on a sound business case
• Pick the low hanging fruits, and develop a track record.
• Report on savings internally
• Meter, Meter, and Meter, then analyse and act.
• Benchmark (kl/m², VA/m², kWh/m²), and prioritise.
Thank you.