Solar Energy - a Presentation at the Insttution of Engineers Sri Lanka

In: Science

Submitted By Gnana
Words 1771
Pages 8
Customers with large generators being paid SLRs. 21.15 per unit for generating their own power

. News two days before!

Copper indium gallium (di)selenide (CIGS) verified by NREL to be as efficient as 14.6% in 2006,

NANOSOLAR POWERSHEET THE NEW DAWN OF SOLAR

http://www.popsci.com/popsci/flat/bown/2007/index.html

Solar cell Price and production
2009=6700 MW

1234567

ON AVERAGE AROUND THE WORLD, SUNLIGHT DELIVERS A BARREL OF OIL OF ENERGY ON EVERY SQUARE METER OF LAND
EVERY YEAR

Incoming solar energy to Earth

Sri Lanka gets at 6 kWh/m2/day
7000kWh/year Colombo

Efficiency (Lumens/Watt) Kerosene Incandescent Bulb Light Emitting Diode (LED) .03 5-18 25-50

Rated Life (Hours) Supply of Kerosene 1000 50,000

Cost per 50,000 hours $1251 $175 $20

Buy power during the night

CEB TARIFF
Domestic effective from Nov 2008

Fuel Adjustment Charge 30% on all unit charges except DP & RP consumers consuming less than 90 units per month

Residential tiered tariff
30.00X1.3=Rs39 25.00X1.3=Rs32.50

16.00X1.3=Rs20.80
Rs7.50 Rs4.70 Rs3.00

Rs 39

Rs39/kWh

Technology transfer to rural Sri Lanka

.

.

Annual Savings Before and After
.

10000

.
8000 6000 4000

2000
. 20 0

0

1

2

3

4

5 Years

3

Accumulated Net Savings
. RS

8000 6000 4000 2000
20

.

0
1 2 3 4 5 6 7 8 9 10 11 12 13 YEAR

How Storage will Help Smoothing of Out Put

1 2 3 4 5 6 7 8 9 101

Conversion factor
(multiply top row by factor to obtain side column)
W/m² kWh/(m²·day) sun hours/day W/m² 1 41.66666 41.66666 kWh/(m²·day ) 0.024 1 1 sun hours/day 0.024 1 1 kWh/m²•y 8.765813 365.2422 365.2422 kWh/kWp/y 6.574360 273.9316 273.9316 kWh/m²•y kWh/kWp/y 0.1140796 0.1521061 0.0027379 0.0036505 0.0027379 0.0036505 1 1.333333 0.75 1

Solar Radiation in W/m sq

Efficiency of Solar cells
2009

12345…...

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