RENG 161: Introduction to Energy Conversion Systems - Hydroelectricity

These flashcards cover key concepts about hydroelectricity, including definitions, calculations, statistics, and the environmental impacts associated with hydro power systems.

What is hydro power primarily derived from?

Hydropower is derived from indirect solar power, particularly the energy available from rainfall on high lands.

What is the estimated total global hydro energy resource?

The estimated total global hydro energy resource is about 40,000 TWh per year.

Define 'head' in the context of hydro power systems.

Head refers to the distance from the highest level of dammed water to the power-producing turbine.

What is the formula for calculating stored potential energy in hydro power?

The formula E = MgH is used, where M is mass in kilograms, g is acceleration due to gravity, and H is height in meters.

What percentage of global electricity supply came from renewable energy in 2008?

In 2008, renewable energy contributed approximately 18% of global electricity supply.

How much hydropower capacity does Ghana currently have?

Ghana has a total installed hydro power capacity of about 1580 MW.

What are the three categories of dams based on height?

The categories are low-head (less than 10m), medium-head (10m - 100m), and high-head (greater than 100m).

What is the effective head in hydro power calculations?

The effective head is the actual head minus losses due to frictional drag and turbulence.

What is hydro power's typical overall efficiency range?

Hydropower plants typically have an overall efficiency range of 75-95%.

What types of hydroelectric installations exist?

There are low-head, medium-head, and high-head hydroelectric installations.