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Passive solar design by software

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Passive Solar Design by Software
-It is one part of green building design, and does not include active systems such as Mechanical ventilation or Photovoltaic.
-Three Passive Solar Principles that follow:
Principle 1: Site of Design & Sun Position.

Principle 2: Windows Design.

Principle 3: Overhangs & Shading.

Published in: Engineering, Business, Technology

Passive solar design by software

  1. 1. The University of Jordan Faculty of Engineering & Technology Mechanical Engineering Department Special Topics in Thermal- Energy Management (0954594) Spring Semester 2013/2014 Passive Solar Design by Software AHMAD NAZIH Student No. : 0095626 5 May 2014
  2. 2. “Passive solar heating, cooling and lighting design must consider the building envelope and its orientation, the thermal storage mass, and window configuration and design.” – From ASHRAE Handbook –HVAC Applications 2007 , Ch. 33
  3. 3. • Passive solar buildings aim to maintain interior Thermal comfort. • Passive solar building design is one part of green building design, and does not include active systems such as Mechanical ventilation or Photovoltaic. Figure 1 : Design Aspects
  4. 4. :Three Passive Solar Principles that follow Principle 1: Site of Design & Sun Position. Principle 2: Windows Design. Principle 3: Overhangs & Shading.
  5. 5. Passive Solar Principle 1 Site of Design & Sun Position Historical Perspective: Figure 2: The colonial "salt box" house typical of New England architecture of the 18th century Figure 3: The solar-heated Rose Elementary School in Tucson Arizona. It obtained over 80% of its heat from solar energy for an entire decade, beginning in 1948
  6. 6. “Choosing a good building shape and orientation are two of the most critical elements of an integrated design.” – Sustainable Buildings Industry Council Passive Solar Principle 1 Site of Design & Sun Position Figure 3: House Design before editing Figure 4: House Location before editing
  7. 7. Passive Solar Principle 1 Site of Design & Sun Position - Orient the long, east - west axis of a house within 10 degrees east or west of true south Figure 5: House Location and sun path after editing (SketchUp software)
  8. 8. Passive Solar Principle 1 Site of Design & Sun Position Figure 6: Sun Angle tool ( Sun Design Software)
  9. 9. Passive Solar Principle 1 Site of Design & Sun Position Figure 7: Sun Position tool ( Sun Design Software)
  10. 10. Passive Solar Principle 1 Site of Design & Sun Position Figure 8: Sun Path ( SunCalculator Software) Figure 9: Sun Path tool (Sun Design Software)
  11. 11. Results and Conclusions: • The sun reaches higher in the sky in summer than in winter. • The sun rises further northward in the summer than in the Winter. • Relationship between Solar gain & degrees deviation from true south Passive Solar Principle 1 Site of Design & Sun Position Results of Calculations
  12. 12. Passive Solar Principle 2 Windows Design Window Software: Calculates thermal performance of fenestration, solar optical characteristics & glazing. -Window Library -Glass Library -Gas Library -Glazing System Library -Environment Condition Library -Divider Library -Shading Layer Library Figure 10: Window library (Window v6.3 Software)
  13. 13. Passive Solar Principle 2 Windows Design – In general, we want to tune our windows thus: • South: – High solar heat gain coefficient (SHGC), >0.5 • East, west: – Low solar heat gain coefficient (SHGC), <0.4 • All exposures: – Low U-factor to minimize heat loss (for best overall performance for both seasons)
  14. 14. Passive Solar Principle 2 Windows Design Window v6.3 Software
  15. 15. Passive Solar Principle 2 Windows Design -Locate most windows on the south side of a house. -Minimize windows on the north, west, and east sides. (Too much glazing on east and west walls causes summer overheating). (Too much glazing on north walls results in excessive heat loss). Results and Conclusions: Results of Calculations
  16. 16. Passive Solar Principle 3 Overhangs & Shading
  17. 17. Passive Solar Principle 3 Overhangs & Shading Figure 11: Overhang Design tool(Sun Design Software) Figure 12: Overhang Recommendations tool (Sun Design Software) In a typical commercial building, lighting, heating and cooling represents as much as 65% of the total energy consumption, which puts a significant burden on an operating budget.
  18. 18. Passive Solar Principle 3 Overhangs & Shading Recommended Pitched Overhang Overhang Annual Analysis tool(Sun Design Software) Recommended Horizontal Overhang Non-Recommended Pitched Overhang
  19. 19. Passive Solar Principle 3 Overhangs & Shading Horizontal Shading tool ( Sun Design Software)
  20. 20. Trees also clean the air, create habitat and play areas for children as well as add aesthetic beauty to the neighborhood. Passive Solar Principle 3 Overhangs & Shading
  21. 21. -- Passive solar design can reduce heating temperatures by 30-50% - Sunlight is free and by reducing the use of artificial lighting allows energy savings. Artificial lighting can amount to 35% of a commercial building's energy costs ! - Passive solar systems require no maintenance, as there are no filters to change or ducts to clean. -Passive solar design is a completely clean energy source. It produces no harmful fumes, pollutants or emissions that can harm the environment. Passive Solar Principle 3 Overhangs & Shading Results and Conclusions: Results of Calculations
  22. 22. References 1- Sustainable By Design, SunDesign Software 2- SunTool, SketchUp Software 3- Window v6.3 Software 4- HAP Software 5- The Passive Solar House, James Kachadorian 7- American Society of Landscaping Architects (ASLA) https://www.asla.org/ 6- ASHRAE Handbook ,HVAC Applications 2007

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