Asian Phoenix Resources PowerPal MHG-1000LH Handbuch für Gebrauch und Pflege - Seite 5

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Alternator / generator

Turbine

Water intake canal

Water outlet pipe

Waterfall, dam wall, or cutting

Stream bed.

The various measurements show how to properly construct and set up your system.

The lower diagram (Canal – Plan View) shows the precise internal measurements in

order to construct the water intake canal.

SELECTING A SITE

PowerPal is designed for use in a wide range of locations. The most critical factor is

sufficient water flow. Water flow is the amount of water that passes through the

turbine at any instant, measured in liters per second (l/sec). The second important

factor is head (see below). The following table shows the minimum flow rate and

head to achieve the quoted power output for each model:

Flow (l/sec):

Head (m):

Measuring Flow

Flow can be calculated approximately by knowing the water speed. This speed,

multiplied by the cross-sectional area of the intake canal will give you an idea of the

flow rate. Minimum water flow speeds for each model are:

MHG-200LH:

0.54 m/sec.

MHG-500LH:

0.50 m/sec.

MHG-1000LH:

0.41 m/sec.

As a rule, say half a meter per second, or 5 meters in 10 seconds. Drop a leaf

upstream and read the time it takes to travel the measured distance. Note that this

method is only a guide and you will need a sufficient volume of water flowing at this

rate to make the larger models work.

Measuring Head

The head is the height from the water surface flowing into the turbine down to the

water surface in the stream below. It is shown in the System Diagram.

This head should be 1.5 meters for all PowerPal models. If it is smaller then the power

output will be reduced. If it is larger then your power output will be increased. While

increased power output appears desirable, if the head is too large then the rotor will

turn too fast and reduce the life of the bearings. Try to keep the head in the range of

1.4 meters to 1.6 meters.

Do not attempt to exceed the recommended head height.

MHG-200LH

MHG-500LH

1.5

MHG-1000LH

130

1.5

PowerPal™ Low Head 5