mag

Malaysia Water Research Journal
3.3 Result of Dam Simulation Testing
From the testing, it was found that certain setting of Inverter Pump will
cause to decrease its water level and subsequently interrupting the ram pump
performance. However, at certain setting from 36 to 37Hertz, the ram pump
operated intermittently for sometimes. These could be as an early warning sign
of ram pump system failure and it show that the ram pump requires a certain
amount of detention water above the ram pump to give constant water pressure
to the ram pump. Results of dam simulation testing are shown in Table 5. This
testing scenario had proved that ram pump requires a small size of retention
water structure or mini dam, with a minimum capacity of 2,271 liter for continuous
ram pump operation.
Inverter Pump Setting
Flowrate (Hertz)
Table 5. Summary Result of Dam Simulation Testing.
Ram Pump Operation
Status
Flowrate
(m3/hr)
33.0 Not Operating No Data
33.5 Not Operating No Data
34.0 Not Operating No Data
34.5 Not Operating No Data
35.0 Not Operating No Data
35.5 Not Operating No Data
36.0 Intermittent Operation 151.16
36.5 Intermittent Operation 151.16
37.0 Intermittent Operation 161.7
37.8 In Operation 151.9
38.0 In Operation 137.8
39.0 In Operation 137.0
3.4 Result of Pre-River Simulation Testing
Generally, form this testing scenario; it is possible for a ram pump to operate
without the assistance of retention water. However, it requires some complicated
valves controlling procedures. Pressure gauge at ram pump does not give high
reading, meaning that no additional pressure at ram pump during high and low
peak of flows. However, by the assistance of two valve’s setting, Valves C and
Valves D, had given the possibility for the ram pump to continuously operate.
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Institut Penyelidikan Hidraulik Kebangsaan Malaysia (NAHRIM)
National Hydraulic Institute of Malaysia (NAHRIM)