Rob Young, Director, Young & Satharia Consulting Structural & Civil Engineers

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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.

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Rob Young, Director, Young & Satharia Consulting Structural & Civil Engineers

  1. 1. THE ROLE OF THE STRUCTURALENGINEER IN THE DESIGN ANDREFURBISHMENT OF CANOPYAND ROOF SYSTEMS,TO PROVIDE SOLAR ENERGYROB YOUNG PrEngYOUNG+SATHARIA
  2. 2. THE ROLE OF THE STRUCTURAL ENGINEER INTHE DESIGN AND REFURBISHMENT OF CANOPYAND ROOF SYSTEMS,TO PROVIDE SOLAR ENERGYSUMMARY1. INTRODUCTION2. STATUTORY INFLUENCES3. IMPOSED LOADING INFLUENCE ON THE STRUCTURALCAPACITY OF CANOPY ROOFS.4. SERVICEABILITY AND AESTHETIC CONSIDERATIONS.5. THE OPPORTUNITY FOR INNOVATIVE DESIGN FOR FUTURENEEDS
  3. 3. 1. INTRODUCTION1.1 WHERE WE ARE NOW• GROWTH HAS STALLED IN RECESSIONo PROGRESS OF CATCHING UP COMMENCING• INFRASTRUCTURE BOOM ANTICIPATEDo URBAN RAPID GROWTHo GROWTH IN CONSUMERS MOTOR VEHICLES• TRANSPORTATION IS SOUTHERN AFRICA’S FUTURE ECONOMICDRIVERo REQUIRING ROAD INFRASTRUCTUREo LEADING TO AN INCREASE IN MOTOR VEHICLES
  4. 4. 1.2 A MOVE TO SUSTAINABILITY• BUILDING STRUCTURES ARE ABSORBING AN INCREASING AMOUNT OFENERGYo RESPONSE BY THE SERVICE STATION INDUSTRY REQUIREDo WE MUST REDUCE CARBON FOOTPRINTo RECYCLABLE STEEL STRUCTURES ARE SUSTAINABLE• SHALL I INVEST IN SUSTAINABLE TECHNOLOGYSo WILL IT REDUCE MY LIFE CYCLE RUNNING COSTS• QUESTIONS TO ASKo HAS IT MARKET VALUEo WILL IT GIVE ME A COMPETITIVE EDGE
  5. 5. 1.3 FUTURE OBJECTIVES• FUTURE MEGA TREND MUST PROVIDE FOR :o POPULATION GROWTHo URBANISATIONo CLIMATE CHANGEo ACCELERATED TECHNOLOGY• ENERGY EFFICIENCY = RENEWABLE ENERGY GENERATION• BUILDINGS MUST THEREFOREo BECOME ENERGY POSITIVEo BECOME ENTRY EFFICIENTo BECOME SUSTAINABLE• SERVICE STATION CANOPIES CAN PROVIDE THAT OPPORTUNITY
  6. 6. 2. STATUTORY REQUIREMENTS2.1 ELECTRIC POWER GENERATION• IN SOUTH AFRICA AT PRESENT• COAL 88 %• NUCLEAR 7 %• RENEWABLE 1 %• OPTIONS OF RENEWABLE ENERGY SYSTEMS TO ESKOM GRID• USING THE SUN – SOLAR RADIATIONo PHOTO VOLTAIC PANELS- EFFECIENCY AND COST IMPROVING- LIGHT MASS PANELS FACING SUNo SOLAR HEAT RADIATION- WATER HEATING SYSTEMS- REQUIRES STORAGE TANK AND GEYSER SYSTEM• USING THE WINDo PREDOMINANT FOCUS INTERNATIONALLYo NOT CONSISTENT ENOUGH AND VARIES THROUGH COUNTRYo WOULD REQUIRE COSTLY BATTERY BACKUPo PHYSICAL ACCOMMODATION AND AESTHETICALLY DIFFICULT• CONCLUSIONo PHOTO VOLTIAC PANEL MOST SUITABLE FOR CANOPY ROOFSo PREDICTION THAT UP TO 20 % GENERATION AVAILABLE IN SOUTH AFRICA
  7. 7. 2.2 DOCUMENTATION• REQUIREMENTS TO MEET THE BUILDING REGULATIONS SANS 10400o PLANNING PERMISSIONo ELEVATION CONTROLo ARCHITECTURAL PLAN SUBMISSIONo STRUCTURAL STABILITY CERTIFICATIONo NO RESTRICTIONS OR REQUIREMENTSTO NOTIFY LOCAL AUTHORITIES WHEN ADDING• OTHER DOCUMENTS AVAILABLEo PROMOTION ADVICE FROM ESKOMo ACCREDITATION FOR GREENSTAR S.A RATING (SINCE 2008)o SARS REFUND – NATIONAL ENERGY ACT 2008ALLOWANCE FOR EVERY EFFICIENT SAVINGS
  8. 8. 3. IMPOSED LOADING INFLUENCE ON THE STRUCTURALCAPACITY OF CANOPY ROOFS3.1 EXISTING STRUCTURESAPPLIED LOADING FOR STRUCTURAL STABILITY• ROOF ACCESS LOAD SABS 10160 +0.25 KPa• WIND LOADSALTITUDE, TERRAIN, LOCALITY,BUILDING SHAPEFORCES RANGE FROM:-- SEVERE COASTAL -1.33 KPa / +0.20 KPa- URBAN INTERIOR -0.49 KPa / +0.48 KPa• PREDOMINANT LOAD TO STRUCTURE IN MOST SITUATIONSIS DUE TO WIND UPLIFT, RESULTING IN:-- LARGE FOUNDATIONS- RAFTERS DESIGNED FOR UPLIFT CASE• OPPORTUNITY FOR:-- INCREASING GRAVITY VERTICAL LOADeg. PHOTOVOLTAIC PANELS +0.15 KPaFLAT PANELS PREFERREDSAIL EFFECT MAY REQUIRE BRACING
  9. 9. 3.2 NEW STRUCTURES• DESIGNED FOR VOLTAIC PANELS DIRECTLY• LITTLE INFLUENCE ON STRUCTURAL DESIGN AND COST• ANGLED PANELS CAN BE ACCOMMODATED IF NECESSARY• OPTIONS OF OMITTING ROOF SHEETING AND REPLACING WITH PANELS• EXPLORING NEW CONFIGURATIONS
  10. 10. 4. SERVICEABILITY AND AESTHETIC CONSIDERATIONS• STRUCTURAL FORMo STRUCTURAL STEEL FRAME WORK BEST OPTION- STEEL IS GREEN DUE TO RECYCLE SUSTAINABILITY 40 - 80% REUSEo PREFABRICATION OPPORTUNITIES- MODULAR CONSTRUCTION OFF SITE- FAST TO ERECT / DISMANTLE / RE-ERECTo OPTION TO APPROACH DESIGN AS AN INTERGRATEDSYSTEMo PHOTOVOLTAIC PANEL TYPES- RIGID PANELS FIXED TO SHEETING IN FRAMES- PANELS GLUED TO A BASE SURFACE- FLEXIBLE ROLLS GLUED TO A SURFACE- AS A ROOF PANEL
  11. 11. 5. THE OPPORTUNITY FOR INNOVATIVE DESIGN FOR FUTURE NEEDS5.1 OVERVIEW• OPPORTUNITY IS A CHALLENGE- A CHALLENGE IS AN OPPORTUNITY• JOIN THE BANDWAGON ON SUSTAINABILITY- LOOK YOUR GRANDCHILDREN IN THE EYE• EMPLOYMENT OPPORTUNITIES FOR NEW MARKET FIELD- ELECTRIC CARS?• WORKSHOP POTENTIAL IN SOUTH AFRICA• INVEST IN INNOVATION• THINK AHEAD IN A NEW DESIGN APPROACH
  12. 12. 5.2 APPROACH DESIGN AS AN INTEGRATED SYSTEM• CHANGE THINKING FROM SEPARATE SYSTEMS• COLLABORATE WITH SYSTEM SUPPLIERS TO ACHIEVE ECONOMICS OFSTRUCTURE• USE OF 3D/BUILDING INFORMATION MODELLING TO CO-ORDINATE SYSTEM- STRUCTURE / PANELS / ELECTRIC SERVICES• USE OF LIGHT STEEL FRAMING SYSTEM OPTIONS
  13. 13. 5.3 CONCLUSION• OPPORTUNITIES NOW EXIST FOR:-o THE REFURBISHMENT OF EXISTING CANOPIES AND ROOFSo THE DEVELOPMENT FOR NEW INTEGRATED SUSTAINABLE ROOF SYSTEMS

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