indigo solar ppt
TRANSCRIPT
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Introduction
India is a Young country
• July 2011-Population = 1189 million of which
– 0-14 years: 29.7%
– 15-64 years: 64.9%
– 65 years and over: 5.5%
• Dependency ratio of 0.6; 2030-0.4
• 2020 Average Age: India-29; China-37; Japan-48:
India will have youngest working age population in world With this young population India ‘can’ grow fast, provided
the young population is well-educated and well-trained
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Continued…..
“Right to Education” successfully implemented by Government of India through “Sarva Sikhsha Abhiyan”
Need to implement “Right to Clean Light”
LED based Solar Urja Lamp (SOUL) is a Solution to “Right to Clean Light”
The power consumption for SOUL whole year is even less than a 1 unit
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Design Prospective: Product Design
Light Right Design
Electrical Design
Solar Panel Design
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Product Design
LED Housing
LED
Gooseneck
Base of Lamp
1 feet height
SOUL product model
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Light Design
The standard lux level for general purpose lighting is 150 lux and that for studying is 250 lux according to the international standards for lighting.
The LED is a 150 lumen per watt
Mode Power
(W)
Lumen ExposedArea under
lamp(m2)
Lux(Lumen/
m2)
Standard Light level (Lux)
1 0.192 28.8 0.185 155 150 (general)2 0.352 52.8 0.185 285 250 (study)
Table for Lux level calculations:
Mode 1: low intensityMode 2 : high intensity
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Electrical Design
Battery Electronics Controller
Solar Panel
LED Housing
LED
Goo
sene
ckSun
SOUL basic electrical model
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Electrical Design (Cont..)
Operating Voltage Power Consumption (Pmax) Luminance
3.2 V 0.5 Watts 75 lumen
1. LED Technical Specifications:
2. Design Table for calculation of battery capacity
Mode Volt(V)
Current(A)
Power(W)
Energy(Whr)
Efficiency(%)
Energy(Whr)
Battery voltage
(V)
Charge(mAh)
DoD(%)
Capacity(mAh)
1 3.2 0.06 0.192 1.54 85 1.81 2.4 (NiMH)
753 80 941
2 3.2 0.11 0.352 1.76 85 2.07 2.4 (NiMH)
863 80 1078
1 3.2 0.06 0.192 1.54 85 1.81 3.7 (Li Ion)
490 80 611
2 3.2 0.11 0.352 1.76 85 2.07 3.7 (Li Ion)
560 80 700
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Electrical Design (Cont..)
3. Design Table for calculation of Solar Panel capacity
• Nearest available capacity of battery is 1200 mAh NiMH
• Peak Power rating of solar module can be 1 approximated to 1 Wp
Mode Energy(Wh)
BatteryEfficiency
(%)
Energy(Wh)
SunshineHours
(H)
Power(W)
Fill Factor
(%)
Peak Power(Wp)
1 1.81 90 2.01 4.5 0.447 70 0.642 2.07 90 2.30 4.5 0.511 70 0.73
Design Table for calculation of Solar Panel capacity
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Solar Panel Design
Vmp (STC) V
Temp coefficient mV/ C
Temp differenceC
Voltage drop per cellV
Net Voltageper cell
V0.47 2.3 40 0.092 0.378
Solar cell parameters:Power O/P of Solar Panel : 1 WVoltage : 0.47 VCurrent density : 30 mA/m2
Temp : 25 C. Voltage Coefficient : 2.3 mV/ C
• Battery voltage : 2.4 V• Charging voltage : 2.4 + 1.4 = 3.8 V• No. of Cells = 3.8 V ÷ 0.378 V = 10 numbers
(approx.).
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Solar Panel Design (cont…)
No. of Cells = 3.8 V ÷ 0.378 V = 10 numbers (approx).Power Rating /Cell = 1 W ÷ 10 = 0.1 W. Current Rating /Cell = 0.1 W ÷ 0.47 V = 0.212 A = 212 mA. Area of each Cell = 212 mA ÷ 30 mA/sq. cm. = 7 sq. cm. Total area of 10 Cells = 10 x 7 sq. cm. = 70 sq. cm. Packaging density = 50 %Area of panel Panel = 70 sq. cm. ÷ 0.5 = 140 sq. cm
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Conclusion:
A powerful component of design for need which looks at the user needs, service needs , distribution issues and most important the empowerment of children .
The design using the best technology for various components and deploying it in system
The proposed solar study lamps will have◦ 0.5 Wp solar panel◦ 0.5 Watt LED◦ 1200 mAH of battery storage◦ Provides light intensity of about 280 Lux (good enough for
study) ◦ 6 to 7 hours of daily service.
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Thanks For your attention !