On Friday, 23.12.2011, me and Mr. Binh visited the water supply station in Mỏ Ó, Trần Đề district as there was installation of the renewable energy pumping system. GRUNFOS is a Danish company in charge. The whole system (including one solar panel, one wind turbine, one electric control set, 2 submerged pumps) costs around 20,000 USD.
The principle mechanism of this system is that the renewable energy collected will be used directly for pumping without batteries (no need for electric storage device). In the evening, the pumping can use electricity from the grid through the converting set. Therefore, this system is not entirely substitute to the existing electric system but functioning as supplementary, especially in the evening. When operation, this solar-wind pumping system is expected to save about 12,775 kW per year. Its maximum capacity is 210 cubic meter of water per day, which can serve for 166 to 700 households (for 60 L per person per day and with 5 people per household).
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| The Mo O water supply station (view from the main road) was built in 1998, by UNDP project on clean water for rural area. |
The water tank and water treatment facilities
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| The solar panel |
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| Wind turbine installation (photo by GRUNFOS team) |
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| The final system, after installation (photo by GRUNFOS team) |
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