Lab -power Plants-experiment-2.docx

Power Plants -Lab

Experiment No. 02 Objective: To observe the conversion of wind energy to electrical energy and to understand functioning of wind power plants

Apparatus: Wind energy conversion power plant Generator, 12V

Figure:

Figure 1- Wind energy conversion power plant

Procedure: General Start up Procedure 1. 2. 3. 4. 5. 6. 7.

Switch ON the control unit by lifting the Breaker Switch ON the Axial fan and set it to rotate at specific RPM Set the Anemometers at required speed unit Note Wind speed from Anemometer Note the Voltage (Ensure that battery is being charged) Turn ON the Load Lamp Note current and voltage

Power Plants -Lab

General Shutdown Procedure: 1. Turn OFF Anemometers 2. Switch OFF the Axial fan 3. Switch OFF the control unit from Breaker

Useful relations: Coefficient of Power Coefficient of Power of a wind turbine is a measurement of how efficiently the wind turbine converts the energy in the wind to electricity Coefficient of Power =

Electrical Power output of the turbine Theoretical power available in the air flow

Theoretical power available in the air flow 1 𝑃 = 𝜌𝐴𝑉 3 2 Electrical Power output of the turbine 𝑃 = 𝑉𝐼 Coefficient of Power 𝐶𝑜𝑒𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑡 𝑜𝑓 𝑃𝑜𝑤𝑒𝑟 = 1 2

𝑉𝐼 𝜌𝐴𝑉 3

Tip Speed ratio Tip speed ratio for wind turbine is the ratio of the translational speed at the tip of turbine blade to the actual velocity of wind 𝑇𝑖𝑝 𝑠𝑝𝑒𝑒𝑑 𝑟𝑎𝑡𝑖𝑜 = 𝜆=

𝑇𝑖𝑝 𝑠𝑝𝑒𝑒𝑑 𝑜𝑓 𝑏𝑙𝑎𝑑𝑒 𝑊𝑖𝑛𝑑 𝑠𝑝𝑒𝑒𝑑 𝜔𝑅 𝑣