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Use of Renewable Energy in Buildings - ISHRAE

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Presentation given at the ISHRAE Acre Serve Workshop in March 2014 on use of Renewable Energy in Buildings. It gives an overview of the various forms for Renewable Energy and talks about challenges in implementing this clean alternative energy in Buildings.

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Use of Renewable Energy in Buildings - ISHRAE

  1. 1. Living in harmony with Nature Renewable Energy In Buildings Mar 2014 ISHRAE : Acre Serve Tejwant Navalkar Executive Director, DFX Systems Pvt Ltd
  2. 2. Living in harmony with Nature  The need for Renewable Energy  Renewable Energy – An Introduction  Solar Energy – An Overview  Traditional Solar PV Solutions  Solar Thermal Solutions  CASE STUDY – A 240.7m tall Building • Building Features • Solar Hot Water Schematic • Challenges in implementing Renewable Energy • Solution for Hot Water Generation  Other Applications AGENDA
  3. 3. Living in harmony with Nature In INDIA, despite POWER being the life line of Progress there is : • Acute shortage of Energy, Power Cuts leading to Erratic Power supply and loss of production, comfort. • Ever rising cost of power per unit due to high cost of distribution and transmission, subsidies and power thefts • Increasing deficit between Power Generation and Demand resulting out of rapid infra-structural development and industrial growth • High Environmental damage caused by traditional Energy Resources and Power Plants resulting in global warming • Average Indian is being held to ransom by the Oil Producing countries Energy Scenario in INDIA
  4. 4. Living in harmony with Nature Alternate Source of Energy is the need of the hour and would provide the means to : • Combat rising energy prices by harnessing Perpetual sources of Energy - Wind, Solar, Water and Geo-Thermal Energy • Virtual ZERO Global Warming • Achieve Freedom and Insulation from Crude Oil Price fluctuations • Self Reliance, since Renewable Energy Generation can be set up at point of usage, thereby reducing Transmission Losses and Pilferage • Increase bottom lines due to guarantee in meeting production schedules, minimal loss of productive time and fixed price of energy Why Renewable Energy
  5. 5. Living in harmony with Nature
  6. 6. Living in harmony with Nature  Solar Photovoltaic (PV) Systems  Solar Thermal Solutions  Wind Turbine  Bio-gas for cooking & electricity generation RENEWABLE ENERGY : An Overview
  7. 7. Living in harmony with Nature The Power of Solar – Some Awesome Figures • SOLAR Provides the best alternative for meeting the Industrial and Domestic needs the world over • The sun provides with 174 Petawatts (PW) of solar energy, • The world uses 16 Terrawatts (0.009%) of this energy today • More than 50% of Energy Needs are thermal (Heat) 1 Terrawatt = 1012 W 1 Petawatt = 1015 W
  8. 8. Living in harmony with Nature
  9. 9. Living in harmony with Nature What is Photovoltaics • In Photovoltaic (solar) systems light energy is converted into electricity. • A Solar Cell is the basic element of each photovoltaic system. • Solar cells produce direct current electricity from light, which can be used to power equipment or to recharge a battery . • The first practical application of photovoltaics was to power orbiting satellites and other spacecraft.
  10. 10. Living in harmony with Nature Components of Solar Modules
  11. 11. Living in harmony with Nature Solar Photovoltaic based Solutions • Solar Farms for Uploading to Grid – MW scale • Solar Off-Grid Solutions for Diesel reduction – 100 KW scale • Solar Stand-alone systems for small systems – W scale PV special solutions Telecommunications Special architectural applications PV Off-grid systems Free field plants On-roof installations PV for roof top applications Public buildings Private buildings PV power plants On-roof PV plants Large-scale free field KW- Scale (Small) 100KW- Scale (Med) MW- Scale (Large)
  12. 12. Living in harmony with Nature Typical Off-grid Solar PV Systems
  13. 13. Living in harmony with Nature Typical Solar Based Backup Grid Solar Panels Battery Bank Grid Supply D G Set 3-Ph Inverter Solar Panels Battery Bank Grid Supply 3-Ph Inverter MAIN LT PANEL
  14. 14. Living in harmony with Nature Challenges in Implementing Photovoltaic (PV) Systems • Storage is mainly Battery based and inherits its inefficiencies • Battery replacement is a recurring cost • Most Electrical equipment run on AC Supply, hence PV System requires 3 levels of conversions : Battery Charging/ Discharing Inverter DCAC • This results in about 20% to 27% additional losses • Lack of Net Metering for small and medium systems • Large PV Systems rely heavily on government subsidies and policies
  15. 15. Living in harmony with Nature • Storage Batteries are like bottles • The Time taken to fill-up or empty the bottle is determined by the bottle neck. • Similarly time taken to charge a battery is determined by the Charge rate of a battery • Simply increasing battery capacity does not ensure capturing the full energy generated by Renewable Resources Batteries are like Bottles
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  17. 17. Living in harmony with Nature Solar Water Heaters – Evacuated Tube Collectors
  18. 18. Living in harmony with Nature Domestic Solar Water Heaters Consumption Pattern
  19. 19. Living in harmony with Nature Domestic Solar Water Heaters Generation Deficit Pattern
  20. 20. Living in harmony with Nature Challenges in Implementing Solar Thermal in Buildings • As seen from the previous charts, the Domestic Hot Water Requirement Peak does not match with the generation peak • Storage of Thermal Energy is not used • A lot of generated energy is wasted through overheating and therefore steaming due to lack of demand at generation peaks • Very little control on the temperature and availability • Due to lop-sided generation and utilization, hot water availability is largely on first come first served basis • Lack of terrace areas to cater to the complete demands of the building
  21. 21. Living in harmony with Nature  It is extremely important to understand that NO single Renewable Source of Energy can fulfil the complete annual requirements of an end user  It is essential to study the customer's requirement, the availability of renewable resources in the specific location  Requirement of customized solutions based on specific needs  The key to making Renewable Energy Solutions effective, is I in providing Integration of the various Renewable Energy Resources Conclusion
  22. 22. Living in harmony with Nature Renewable Energy Usage – The Beneficiaries
  23. 23. Living in harmony with Nature Tejwant Navalkar : +91-9821411436 tmn@dfxsystems.org Contact Details Tejwant Navalkar Engineering & Renewable Energy Solutions Your Partner in Designing For eXcellence www.dfxsystems.org Tel: 91-22-2422 2664
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