What are the advantages and disadvantages of using micro hydro water wheels?

Answer 1

==== ==== ==== ==== == Efficient energy source

It only takes a small amount of flow (as little as two gallons per minute) or a drop as low as two feet to generate electricity with micro hydro. Electricity can be delivered as far as a mile away to the location where it is being used. Reliable electricity source

Hydro produces a continuous supply of electrical energy in comparison to other small-scale renewable technologies. The peak energy season is during the winter months when large quantities of electricity are required. No reservoir required

Microhydro is considered to function as a 'run-of-river' system, meaning that the water passing through the generator is directed back into the stream with relatively little impact on the surrounding ecology. Cost effective energy solution

Building a small-scale hydro-power system can cost from $1,000 - $20,000, depending on site electricity requirements and location. Maintenance fees are relatively small in comparison to other technologies. Power for developing countries

Because of the low-cost versatility and longevity of micro hydro, developing countries can manufacture and implement the technology to help supply much needed electricity to small communities and villages. Integrate with the local power grid

If your site produces a large amount of excess energy, some power companies will buy back your electricity overflow. You also have the ability to supplement your level of micro power with intake from the power grid. == Suitable site characteristics required

In order to take full advantage of the electrical potential of small streams, a suitable site is needed. Factors to consider are: distance from the power source to the location where energy is required, stream size (including flow rate, output and drop), and a balance of system components - inverter, batteries, controller, transmission line and pipelines. Energy expansion not possible

The size and flow of small streams may restrict future site expansion as the power demand increases. Low-power in the summer months

In many locations stream size will fluctuate seasonally. During the summer months there will likely be less flow and therefore less power output. Advanced planning and research will be needed to ensure adequate energy requirements are met. Environmental impact

The ecological impact of small-scale hydro is minimal; however the low-level environmental effects must be taken into consideration before construction begins. Stream water will be diverted away from a portion of the stream, and proper caution must be exercised to ensure there will be no damaging impact on the local ecology or civil infrastructure.

Answer 2

Once the plant is up and running it can give a lot of energy with very little emissions - which is good

To build a big plant you also need to build a big dam, which will cause big changes to the immediate environment - which isn't that nice.

Answer 3

it is renewable