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Solar Thermal Systems

Solar Thermal Systems. Trends and Technology. Contents. 1) Introduction 2) Evacuated Tube Technology 3) Evacuated Tube Projects 4) Design Consideration 5) Control Systems. 1) Introduction. Solar Thermal has been around a long time

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Solar Thermal Systems

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  1. Solar Thermal Systems Trends and Technology

  2. Contents • 1) Introduction • 2) Evacuated Tube Technology • 3) Evacuated Tube Projects • 4) Design Consideration • 5) Control Systems

  3. 1) Introduction • Solar Thermal has been around a long time • Solar Thermal technology is quite mature – far more efficient than PV – over 90% • Flat Plate and Evacuated Tube both Developed Technology • Payback 10-15 years with no rebates and at current energy prices.

  4. Applications • Domestic Hot Water • Hotels, Apartments, Condos, Restaurants • Industrial Hot Water • Parts washing, Process heat • Agricultural Hot Water • Dairy, Bottling • A/C Reheat – Dehumidification • Space Heating • Chillers • Swimming Pools

  5. 2) Flat Panel Technology

  6. 2) Flat Panel Technology

  7. 2) Evacuated Tube Technology

  8. 2) Evacuated Tube Technology • Two most important parts: vacuum insulation and heat pipe technology • Vacuum – the best insulator • Heat pipe – takes advantage of the latent heat of steam • Styles • Flow through • Sealed pipe • Temperature limiting

  9. 2) Evacuated Tube Technology

  10. 2) Evacuated Tube Technology

  11. 2) Evacuated Tube Technology Evacuated Tube vs Flat Plate

  12. 2) Evacuated Tube Technology • Efficiency Curve Comparison:

  13. 2) Evacuated Tube Technology • Output of Selected Solar Panels (SRCC Data):

  14. 2) Flat Plate Example

  15. 3) Cinco Solar – ARC Project

  16. 3) Cinco Solar – ARC Project

  17. 3) Cinco Solar – Bexar County Jail Project

  18. 3) Cinco Solar – Bexar County Jail Project

  19. 3) Evacuated Tube Projects

  20. 3) Evacuated Tube Projects

  21. 3) Evacuated Tube Projects

  22. 3) Evacuated Tube Projects

  23. 4) Design Considerations • Facility BTU usage • Existing Facilities vs New • Flow meters, BTU meters • Watt meter or Gas meter • Recirculation • Collectors • 35,000-40,000 BTU/day • Storage • Use Profile • 40 -80- gallons per collector

  24. 4) Design Considerations • Freezing • Freezing is biggest problem with solar thermal - up till now solution has been: • Glycol – heat capacity, double wall, glycolic acid • Drainback – practical limitations • Evacuated Tube • Direct water • Simple • Fewer components • Lower maintenance

  25. 5) Control Systems • Size of System • Few intermediate Delta T controllers • RESOL DeltaSol M – 12 inputs, 6 outputs, pre-programmed • Temperature compensating valves • Data Acquisition • Additional data for efficiency and service Temperature alarms Low Flow/Pressure alarms • Real time $$ Savings Reports • PLC considerations • Flexibility, scalability • Remote logging • Building management interface

  26. http://www.cincosolar.com

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