Energy conversion: pumps and turbines Flashcards
What are pumps and turbines?
Exchange flow kinetic energy and electrical energy
What is the difference between pumps and turbines?
Pumps provide energy to the flow areas where turbine extract energy
What are pumps used for?
Pumps used for irrigation, water supply, sewage movement
What are turbines used for?
Turbines used to generate power
What is a commonly used pump?
Centrifugal pump
How does the centrifugal pump work?
- Spinning rotor blades causes centripetal acceleration
- Centrifugal forces → low pressure at centre and high at outlet
How can you determine the efficiency of a pump?
The efficiency is a function of head required and discharge
What do pumps allow us to do?
A pump allows us to move water from one reservoir to another
How is the energy head increased?
Pump adds energy
Why are turbines similar to pumps?
- Turbine is essentially a pump running in reverse
- Takes KE from the flow
What size turbines can be used in hydro plants?
Can have medium to very large turbine
