Monday, February 1, 2010

Week 3 reflection --Jun Rong

In this week, we had discuss about how to convert the kinetic energy into hydro-electric energy.
We had mainly focus on the process of conversion so that it will lessen the burden of the whole project.

Some questions that are still going around in my head:
What materials are we gonna use to replace those that are used on an actual life size boat?
How are we going to substitute the turbine with a turbine that is smaller?

3 things I learnt:

I learnt that you need a water-turbine storing underneath the boat so that energy will be converted easily

We need to measure how much force needed for the boat to move which depends on the structure and materials use for the boat.

The power in available in a stream of water is;

P=\eta\cdot\rho\cdot g\cdot h\cdot\dot q

where:

  • P = power (J/s or watts)
  • η = turbine efficiency
  • ρ = density of water (kg/m³)
  • g = acceleration of gravity (9.81 m/s²)
  • h = head (m). For still water, this is the difference in height between the inlet and outlet surfaces. Moving water has an additional component added to account for the kinetic energy of the flow. The total head equals the pressure head plus velocity head.
  • \dot q= flow rate (m³/s)



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