2011 International Conference on Alternative Energy in Developing Countries and Emerging Economies
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1,250
1,300
1,350
1,400
1,450
1,500
1,550
1,600
1,650
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Volume (m3)
Average
Fig. 14. The fraction of solar and wind power for a hybrid water
pumping system.
Fig. 15. shows the variation of pumped water yield by
a hybrid solar and wind water pumping system. The
monthly average pumped water yield was in the range of
1,410-1,570 m
3
whereas the yearly average pumped water
yield was 1,540 m
3
which sufficient for drinking and
small irrigation for agricultural activities for the whole
year.
Fig. 15. The variation of pumped water yield by a hybrid solar and wind
water pumping system operated under ambient condition of Phatthalung
province, southern Thailand.
TABLE II
T
HE COMPARISON OF EXPERIMENTAL AND SIMULATED RESULTS OF POWER PRODUCED BY A
PV
GENERATOR AND A WIND TURBINE GENERATOR
.
Month/Year
Experimental Results
Power Output (W)
Simulated Results
Power Output (W)
Percent Absolute Error
a-Si Solar Cell
(%)
Percent Absolute Error
Wind Turbine
(%)
a-Si
Solar Cell
Wind
Turbine
a-Si
Solar Cell
Wind
Turbine
Nov, 2009
97.48
3.11
118.44
3.21
21.50
3.21
Dec, 2009
265.68
4.99
236.57
4.27
11.07
14.50
Jan, 2010
151.27
4.20
170.44
3.60
12.82
14.23
Feb, 2010
173.24
4.24
151.54
3.16
12.77
25.52
Mar, 2010
114.67
17.05
131.01
15.59
14.92
8.59
Apr, 2010
149.50
2.18
141.78
2.15
5.16
1.25
IV. C
ONCLUSIONS
The transient simulation was carried out using
TRNSYS 16.01 computer program with ambient
condition in Phatthalung province, southern Thailand in
order to predict the monthly power output generated by a
PV generator and by a wind turbine generator as well as
to predict the monthly water yield. The predicted data
was compared to the field experimental results for model
validation and the percentage absolute error was
computed. Result showed that the predicted monthly and
yearly average power produced by a PV generator was in
the range of 351-504 W and 407 W corresponding to the
monthly and yearly average efficiency of 4.27-5.94% and
5.1%. The predicted monthly and yearly average power
by a wind turbine generator was in the range of 1-213 W
and 67 W corresponding to the monthly and yearly
average efficiency of 0.13-22.06% and 6.75%. The solar
and wind fraction were 85.80:14.20. The percentage
absolute error was in the range of 5.16-21.50%. While for
the wind turbine generator, it was in the range of 1.25-
25.52%. Finally, due to the power output of this kind of
system rely mainly on the operation of a PV generator,
therefore, the optimum solar and wind water pumping
system should be prioritized under such ambient
condition prior to system implementation. This could be
done by using HOMER computer tool.
A
CKNOWLEDGMENT
The authors gratefully acknowledge Thaksin
University for providing the research fund of the project
(Fiscal Year 2007-2008). The authors also acknowledge
the Thailand Research Fund (TRF) (MRG-WII 505S043)
and Thaksin University for co-funding of this project.
The authors would like to thank the Energy Policy and
Planning Office, Ministry of Energy as well as Graduate
School, Thaksin University for financial support of the
project. The authors would like to thank the Solar and
Wind Energy Research Unit, Thaksin University and
AML Technology Co., Ltd. for the provision of the
research facility.
R
EFERENCES
[1]
Meah, K., Ula, S. and Barrett, S., Solar photovoltaic water
pumping-opportunities and challenges,
Renewable &
Sustainable Energy Review
, vol. 12, 2008, pp. 1162-1175.
[2]
Bucher, W., Aspects of solar water pumping in remote
regions,
Energy for Sustainable Development
, vol. 3, 1996,
pp. 8-27.
[3]
Whitfield, G. R. Bentley, W. and Burton, J. D., Increasing
the cost-effectiveness of small solar photovoltaic pumping
systems,
Renewable Energy
, vol. 6, 1995, pp. 483-486.
[4]
Kumar, A. and Kandpal, T. C., Renewable energy
technologies for irrigation water pumping in India: a
preliminary attempt towards potential estimation,
Energy
,
vol. 32, 2007, pp. 861-870.
