| Summary: | Solar Water Pumping System (SWPS) in Plawan Cave was build in 2008
to meet the water needs of the people in Giricahyo village, Purwosari District,
Gunung kidul Regency. SWPS has a capacity of 12 kWp (kilowatt peak) and was
used to drive submersible pump 10 pieces. SWPS has been damaged and are not
functioning since 2010. This study is aimed to assess the SWPS based on the data
characteristics of each component. The scope of research are analysis of the solar
panels, pumps, controllers and cabling systems.
Generally, solar panels are still in good condition but the efficiency were
decreasing. Measured value of efficiency at 15, 21, 22 September 2013 is about
7.10 to 10.88% from the normal efficiency that is 13.89%. Several solar panels
suffered hot spot that have a significant decrease in efficiency, that is about 4.52
to 5.7%. Pump suffers strong corrosivity and scaling on the mechanical
components so as to hinder the movement of the pump when used. However, the
pump still has a good electrical condition. Controller suffered damage in its
regulator components. Improvement of controller can only be done with a
probability of 33.3%. System wiring is still in good condition although there is an
increase in resistance values.
Improvement recommendations to be done are: replacing solar panels that
have hot spot and permanently installed solar panels at an angle of 8
o
to the north.
The pump must be repaired on mechanical components such as rotors, couplings
and piping connections. Overcoming scaling required periodic cleaning of the
pump. Controller can only be repaired about 3 pieces and the rest should be
replaced. Then the wiring needs to be relocated to land with low human activity or
make the lines underground. The investment cost for the repair is 127 507 000,00
IDR.
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