Asian Phoenix Resources PowerPal MHG-500HH Instrukcja obsługi i konserwacji - Strona 16

Przeglądaj online lub pobierz pdf Instrukcja obsługi i konserwacji dla Przenośny generator Asian Phoenix Resources PowerPal MHG-500HH. Asian Phoenix Resources PowerPal MHG-500HH 18 stron. High head micro-hydroelectric generator

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Also, the diagrams and much useful information on pages 7 and 15 are taken from Micro-

hydropower Sourcebook – A Practical Guide to Design and Implementation in

Developing Countries. NRECA, 1986.

Special thanks go to David Willcox of the UK for his invaluable input and suggestions.

APPENDIX A – FOREBAY DESIGN

The instructions given on page 7 of this manual to design the forebay are adequate for

most cases. The most important aspects of forebay design are:

1) To allow a continual flow of water to the penstock so that the turbine keeps

functioning.

2) To have sufficient safeguards to prevent sand, vegetation and other debris from

entering the penstock which could cause blockages and disrupt the turbine. This

includes a safety aspect to keep away children and animals that could possibly be

injured by the suction of water entering the penstock.

3) To have an easy way to stop the water flow when changing the bearings etc.

The following diagram shows a simple forebay design that may be used to achieve all the

above goals.

Here, the forebay is made of a

waterproofed box situated between

the power canal (power conduit) and

the penstock. A loosely fitting PVC

elbow is inserted between the

penstock inlet and the main penstock

pipe. Flow to the penstock is cut off

by pulling the cord so that the inlet is

out of the water. The plugged drain is

used to periodically empty out sand

and leaves or else this can be

shoveled out. The perforated pipe end

further reduces litter intake. Here the

number and size of holes are

important so that flow is not

obstructed. For 110mm PVC pipe

there should be 110 drilled holes of

12mm diameter. The box need only

be say 40cm x 40cm x 40cm and may

be locked to keep away children etc.

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