Asian Phoenix Resources PowerPal MHG-200HH Panduan Petunjuk Penggunaan dan Perawatan - Halaman 5

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SELECTING A SITE

PowerPal is designed for use in a wide range of locations. There are two critical factors

that influence power output – head and flow. Head is the vertical distance between the

turbine and the water source (forebay), measured in meters. Flow is the amount of water

that passes through the turbine at any instant, measured in litres per second (l/sec). The

following table shows the various combinations of head and flow to achieve certain

maximum power outputs for each model:

Turbine

MHG-200HH

MHG-500HH

Water head H (m)

Water flow Q (l/sec.)

6.3

6.4

7.4

7.9

8.4

8.9

9.1

Power output (W)

160

200

275 325 390 460 520

For example, if your site has available 11 meters of head and a water flow of 9.1 litres per

second then a PowerPal MHG-500HH will produce up to 520W of electricity.

Measuring Head

The head is the height from the water surface in the forebay down to the level of the

turbine. It is shown in the System Diagram. To measure this, use a tape measure and a

clinometer or spirit level etc. A less accurate but useful alternative is to make your own

level from a transparent tube half-filled with water. Attach this to the top of a 1m long

stick and then point this horizontally at a point further up the slope as though it were a

spirit level. By going to that point and repeating the process the total head can be

measured – see the drawing below.

Another method is to use an accurate pressure gauge and a length of hose. Run a water-

filled hose from the forebay to the turbine site and attach the pressure gauge to the bottom

end. The pressure gauge shows 1.422 psi / meter of head e.g. 7.11 psi for a head of 5m to

15.64 psi for a head of 11m.

This head should be between 5 and 6 meters for the MHG-200HH model and between 7

and 11 meters for the MHG-500HH model. If it is smaller then the power output will be

PowerPal™ High Head