This document discusses the design of a green building with optimal solar energy generation and human comfort. It outlines the steps to size a solar photovoltaic system to meet the building's power needs. Computational fluid dynamics is used to model air flow and ventilation in the building. The modeling shows stagnation points and improved ventilation with the addition of solar chimneys and strategically placed vents and outlets.

3. Problems of energy crisis are impending

5. RESOURCE OPTIMIZATION HUMAN COMFORT

6. SOLAR GRID-TIE CONNECTION SUN

7. HOW TO SIZE? SYSTEM REQUIREMENT INVESTMENT

8. ORIENTATION SUNPATH AZIMUTH ANGLE:Ø

11. DESIGN PROCEDURE

12. 1. SYSTEM SIZING Pac = Power required (KWh/yr) = 620000 =340KW Hours/day of 1Sun x 365 days/yr 5 x 365 Pdcstc = Pac = 340/0.97 = 350KW Conversion Efficiency

13. 2. ORIENTATION N Tilt angle = 90 – βN Where, βN= 90° - L + δ δ = 23.45 sin[(360/365)(n-81)]

14. TILT ANGLE OPTIMUM ANGLE: 18.82°

15. 3.1 SELECTION OF PANELS

17. 3.2 SELECTION OF INVERTER

19. 4. ECONOMICS Total investment = Cost of inverter + cost of panels + cost of connectors + cost of module maintenance systems + installation charges Cost of inverters: $4000 x 35 = Rs. 6.5 crore Cost of solar photovoltaic panels: Rs.23700 x 1155 = Rs. 2.7 crore Total cost: Rs. 9.2 crore Approximately total investment: Rs. 10 Crore The total cost spent in buying power per year: Rs. 72,00,000 Total money saved: First 5 years: full efficiency (i.e. the system will provide entire power) Rs. 72,00,000 x 5 = Rs. 3.6 Crore Next 7 years: 90% efficiency Rs.72,00,000 x 0.9 x 7 = Rs. 4.536 Crore Next 13 years: 80% efficiency Rs. 72,00,000 x 0.8 x 13 = Rs. 7.488 Crore (The company of the panels provide the product guarantee of above efficiencies) Total saving for 25 years after installation: Rs. 15.622 Crore Inflation rate of cost of power Investment gains

20. 105 ARRAY 11 300W x 1155 Panels : 346 KW : 11 x 105 11 Panels : Max voltage: 36.86 x 11 = 405V Inverter Input Voltage : 300V – 600V 35

22. Q = m. Cv. δT

24. Fluid flow conditions

25. Include temperature, velocity, pressure

26. Find stagnation point

27. Find pathlines

28. Strategically placing chimneys and inlets and outlets

30. ROOM MODELLING IN ICEM-CFD

31. MESH

32. MESH CUT PLANE

33. MESH TOP VIEW

34. LESSER PATHLINES STAGNANCY POINT VORTICES

35. VELOCITY PATHLINES: 700

37. Qstack= 60 x CD x A x sqrt(2 x g x h x ((Ti-To)/Ti))

38. Duct size: 1:1 (Reduce frictional losses)6” WALL WITHOUT PLASTER INTERNAL AREA: 0.098m2 AREA INCLUDING WALL: 0.3817m2 HEIGHT: 5 feet (1.525m) DUCT SIZE: 0.7m x 0.7m LOUVERS

39. ROOM MODEL WITH CHIMNEY VENTS CHIMNEY VENTS

40. NO STAGNANT AIR VELOCITY PATHLINES: 700 MORE PATHLINES VENTILATION IMPROVED

41. CONCLUSION

42. REFERENCES

43. THANK YOU