9分雅思图表小作文范文全集之流程图 水库发电流程

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9分雅思范文之流程图 水库发电流程The diagram shows how electricity is generated by a

hydroelectric dam.Write a 150-word report for a university lecturer explaining

how the process works.

范文集结：全部15篇9分雅思流程图范文汇总放送

参考范文

The diagram illustrates the basic principles of hydroelectric power. The

process requires the construction of a large dam connected to a powerhouse. The

dam creates a large reservoir and the powerhouse is where the electricity is

generated.

First of all, water trapped in the reservoir behind the dam is forced through

an intake. It then flows into a narrow chamber called a penstock, where the

resulting high pressure turns a turbine. The turbine is connected to a generator

in the powerhouse above, and this is where the movement of the turbine is

converted into electricity. The resulting electricity leaves the powerhouse via

cables that carry it over long distances to where it can be used.

It is interesting to note that a hydroelectric dam creates no harmful

byproducts and relies entirely on natural forces to produce electricity. After

the turbine stage, water flows out through a second channel and into a river.

The process is renewable, thanks to the water cycle in nature.

(163 words, IELTS 8.0)