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- 저자 : ( Enongene Ebong George Ngolle ) (검색결과 1 건)
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( Enongene Ebong George Ngolle ),( Seonggu Hong ) 한국농공학회 2018 한국농공학회 학술대회초록집 Vol.2018 No.-
The Hydraulic Ramp pump has been used to supply water in rural areas without any conventional energy for centuries. The fact that it is self-operating, simple to construct and maintain makes it peculiar in the context of sustainable development. This research is to investigate on the effects of air chamber volume (Va) on the efficiency of a Hydraulic Ram Pump (HRP or Hydram). Specifically, it seeks: To establish a correlation between the air chamber volumes and the efficiency of HRP; to test the appropriate ratio of air Chamber volume (Va) to fall height (Hd); To test the appropriate ratio of air Chamber volume to the lift height (Va/hs); and To see the impact of the angle of supply on the functioning of a HRP. The material used were a reservoir of 50L capacity, an electronic Pressure gauge, a flow meter, and it was constructed using both PVC and Iron pipes of 25mm for the HRP with a supply diameter of 13mm. Data were collected and analysed using Microsoft office Excel (MS Excel). The fall height of 105cm, 170cm and 235cm from the HRP were used against lift heights of 400cm, 500cm and 600cm. Six Air Chambers of 1L to 6L capacities were constructed with same diameter. For each of the volumes sizes, and for each fall height, the 50L water was operated for different lift heights. The maximum pressures were registered and different operating pressures water obtained at complete closure of the delivery valve (0o), when opened at 22.5o, 45o, 67.5o and full open or at 90o turn. The flow rate of pumped water was estimated and waste water was also determined. The main expected results are that; there is effect of the air chamber volume on the efficiency of a HRP. For fall height of 105cm and lift height of 400cm, the 1L Va showed best pumping rate of 5.72 l/s, while the 6L at 6m lift height showed highest water losses. At lift heights of 5m and 6m, the 6L and 3L volumes were best respectively with respective flow rates of 2.39l/s and 2.26l/s. The pressure fluctuation though too high, the maximum was noted for the 1L chamber at 707mbar at the lift height of 7m. The least maximum developed pressure of 666 mbar, was recorded for the 5L at 5m lift height. One can conclude that, the air chamber volume has a significant effect on the efficiency of a HRP and best air chamber volumes for each particular case can be estimated given the fall and lift heights to optimise the cost of production and higher efficiency of a HRP.
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