Recommended forebay size of microhydro
The civil wroks of micro hydropower station-Recommended forebay specifications:
- For single off-Grid micro hydro turgo turbine from 300w to 1000w, flow is small, (usually 2 ~ 8 kilograms of water per second), the forebay construction can be simple. In good earth place, it can be set at the end of this channel, digging deep 80 centimeters, width 80 cm, a simple pool with a spillway can be used as the forebay. Even some clients of HS DYNAMIC ENERGY from the mountainous area to use a larger plastic bottles or similar large container at the top of the mountain as the forebay, and then gather every water nearby by pipe to this forebay, this is also a good solution.
- For 1000w ~ 5000w micro hydropower type unit, because of the flow has reached more than 10 kilograms of water per second, the safety of the machine room (powerhouse) should be taken into consideration, general to adopt concrete structure or rubble concrete structure, the forebay pool storage capacity should more than a cubic meters, the suggested forebay proposal is 80 ~ 100cm depth, 120cm length and 100cm width.
- For 5000w ~ 10000w micro hydropower type unit, forebay should adopt concrete structure or rubble concrete structure, depth of 120cm, width of 100cm, length of 150 ~ 200cm. Making sure there is no leaking of the water pool and guarantee the construction quality is very important. Above 10kw below 100kw micro hydropower system, concrete structure is recommended for the pressure forebay.