Russell Brown, Chief Executive Officer, Ruach Renewable Energy


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With the expected Eskom increases over the next five years, retail petroleum service stations are facing reduced profitability and some even closure as profits are continually eroded by rising operating costs. Electricity is one of the costs that can be managed and self generated.

This conference aims to examine best practices in energy efficiency and unpack the options and complexities of generating electricity from renewable energy specifically for retail fuel sites.

Published in: Technology, Business
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Russell Brown, Chief Executive Officer, Ruach Renewable Energy

  1. 1. Energy for LifeKey Energy Efficiency and RenewableEnergy strategies for service stationsMay 2013Sustainable Efficiency…….through Objective Design
  2. 2. Energy for LifeAgenda– Energy efficiency– Switching and control– Voltage Power optimisation– Indirect Evaporative cooling– Renewable energy– Daylighting– On site generation with solar PV– Incentives, Financing & Funding– The future energy landscape
  3. 3. Energy for LifeSwitching and control– Next step from metering– Technology advances  Cost effective– Mini BMS now possible / affordable– Automate procedural change– Switch circuits on a schedule– Hot water off – off peak/after hours– Extractor fan off – off peak/after hours– Lighting off – BOH after hours
  4. 4. Energy for LifeSwitching and control– Automate procedural change– Demand and consumption control– Set energy budget e.g. R15 000 per month– Budget is broken down into 15 minute cycles– Loads are prioritised for switching– P1 – Lighting BOH non essential off– P2 – AC set-point adjusted by 1-2 Degrees C– P3 – BOH staff facilities– P4 – Hot water off– P5 - dim FOH Lighting by 10% e.g. 600 – 540 lux– Switch circuits to smooth demand peaks and consumption– Dim lights by 10% on peak alert– Adjust AC– Switch off hot water– Automatically achieve saving targets
  5. 5. Energy for LifeVoltage Power optimisation– Many sites in SA (and Africa) suffer from over voltage– Causes– Increased consumption (kWh)– Higher peak demand (kVa)– Increased ware and tear on equipment– Solution– Tap down voltage levels to designed levels– Results– Reduced consumption (kWh)– Lower peak demand (kVa)– Most effective on the following loads– AC, Refrigeration and T8/HID lighting
  6. 6. Energy for LifeVoltage Power optimisation – case study–
  7. 7. Energy for LifeVoltage Power optimisation – case study–
  8. 8. Energy for LifeVoltage Power optimisation – case study–
  9. 9. Energy for LifeVoltage Power optimisation – case study– Results– Savings– 32.78% kVa– 21.41% kWh– N$ 3 157 kVa p.m.– N$ 3 697 kWh p.m.– N$ 6 854 Total p.m.– Payback 1.5 years
  10. 10. Energy for LifeIndirect Evaporative cooling– Cooling 20-30% of site load– Full cooling or pre-cooling approach– Displacement cooling design– Up to 90% saving versus standard DX refrigerated systems– Payback under 2 years
  11. 11. Energy for LifeDaylighting - Introduction– Daylight first design principle– Use daylight before artificial light– Use sun’s renewable resource– Types of daylight– Architectural e.g. windows, clerestory– Passive – skylights, solar tubes– Active– What is the effective measure?– How often are the lights off?– Daylight autonomy – number of hours
  12. 12. Energy for Life1. ACTIVE (Smart)Up to 60% more hours of sunlight100,000 Lumens5 Suns3. INDIRECT (Highest Quality)No hot-spotsNo heat gainNo UV2. COLLIMATED (Smarter)Daylight ANYWHERERETROFIT LARGE SPACES WITH ONLY ONE 24” HOLEThe Sundolier Daylighting Solution
  13. 13. Energy for LifeIntegrated Renewable EnergyFor Off-Grid 24/7 operationIntegrated LED lights + ControllerFor seamless 24h Hybrid lightingFixture CatalogueCustom ArtistFixtureTECHNOLOGY DESIGNDaylight Looks & Feels GoodIntegrated Turnkey SystemsQuality Indirect Daylight
  14. 14. Energy for LifeDaylighting – what is the business case?Interior Daylight Creates ValueFor Retail• 6-11% Average HIGHER SALES• 20% Better Cognitive Performance• Great Color Rendering• Substantial Employee Retention, Attendance, Health• Lower Energy Consumption, Reduced Carbon• Enhanced ImageIndependent research confirmed by
  15. 15. Energy for LifePro Forma for a SS Retail StoreRetail Floor space: 100 sq. m.Monthly Sales per sqm.: R2 500Daylight Sales Increase: 5.0%R150 000Extra Profit (@ 50% margin): R 75 000Daylighting Cost (1 Sundolier): R250 000Return on Investment: 3.3 YearsNote: not including- energy, reduced carbon- associate productivity, retention, health, wellness- enhanced image
  16. 16. Energy for LifeDaylight. Sell More.Tested Daylighting in 1993RESULTSIncreased in salesAssociates are more productive, happier,healthierLower Energy & CarbonGeneral Lighting off on Sunny DaysToday 2,900 Walmart stores have DaylightingDaylighting – who’s done in retail?
  17. 17. Energy for LifeEngen Rundu - Case study– 1 Sundolier lights the retail shop, central area andWimpy (150 sqm)– Designed to 350-400 lux on shelf– Lux Sensor control to dim LED back up lighting– Implemented end of June 2011– 90% saving on lighting
  18. 18. Energy for LifeEngen Commerce Park - Case study– 1 Sundolier lights the retail shop space (90 sqm)– Designed to 450-500 lux on shelf– Lux Sensor control to dim LED back up lighting– Implemented end of April 2012– Projected 90% saving on lighting– Results– Jury is still out– Retail sales being measured– Energy savings being measured
  19. 19. Energy for LifeService Station Retail TomorrowHigh Profile Visibility Green InitiativeDaylight Harvester
  20. 20. Energy for LifeSustainable Daylight
  21. 21. Energy for LifeOn site PV power generation– Design approach– Use all space available– Canopy– Building roof– Carports– Assess structural integrity– Only use battery storage where:– Grid instability e.g. load shedding– Generator operates often – R4 per kWh– Cost effective demand smoothing– Address supply shortages when expanding– Design to cater for average daily load– Average 50-100 kW array possible
  22. 22. Energy for LifeOn site PV power generation– Cost– R20-25 per watt installed– R2 000 000 – 2 500 000 for 100kW array– Payback– 5 years with Eskom SOP– 6.5 years without Eskom SOP– Qualifying tariff– Key tariff value point of R1.60 per kWh– Improves if include peak demand if peak during daylight hours– Infrastructure lifespan– 25 years (80% efficiency) guarantee on panels– 10 year Inverter guarantee– Factor in Net metering – CT & PE
  23. 23. Energy for LifeEskom SOP– Small scale on site generation– R1.20 per kWh generated– 20-30% of PV Capital cost– Pilot phase just completed– Awaiting roll out approval Eskom/Nersa
  24. 24. Energy for LifeUSA based funding– 2 USA agencies– OPIC– EXIM– Specialist Energy efficiency and RET funding for emerging markets– Terms– 85-100% of project value– 10-18 years loans– 2 to 3% fixed interest rate– US technology partners– Suniva for PV projects– Sundolier for daylighting projects– Coolerado for cooling projects
  25. 25. Energy for LifeThe future - EV charge station– Driver : EV business case– Operating cost per km– EV’s electrical R0.14 to R0.22/km– Liquid fuel R1.40 to R2.20/km– Comparable vehicle costs with Govt. incentives– Fast charge station network plan– Hotels– Rental cars– Service stations– Charge station infrastructure– 1MWp /2500MWh Solar PV plant, Energy Storage and Fastcharging stations– R0.50 per km over 5 years– Benefit of increased retail opportunity
  26. 26. CONTACT DETAILSRussell Brown082 444 8187www.rresa.comrussell@rresa.comAny questions ?