Renewable Energy

3: According to heat storage system, calculate the following a) The heat stored in 80 m³ Liquid Sodium by heating it from 150°C to 450°C. The density of Liquid Sodium is 750 kg/m³ and the specific heat of Liquid Sodium is 1260 J/kg°C. b) The Molten Salt volume requires to store 600 MWh if the is stored in Molten Salt by heating it from 150 °C to 450 °C. The density of Molten Salt is 1680 kg/m³ and the specific heat of Molten Salt is 1560 J/kg°C. c) Based on part a & b, which heat storage system has better energy density level.

27. The two fundamental turbulence types for atmospheric wind are: (2%) a) b)

Comparing VAWT and HAWAT, which one causes more obstruction to birds?

1. Which energy source has the most significant change (increase or decrease) over the five-year span. (1%) a) Nuclear b) Coal c) Biomass d) Hydropower e) Wind power f) Solar power

). Define the power coefficient for a wind turbine system: (3%)

25. Explain the difference between Prandl layer and Ekman layer: (2%)

7. What are the seven steps in the general procedures for wind farm development? (7%)

For the basic parameters for Wind Turbine Classes, CC1 refers to: (1%) a) Load bearing structural components that when failed would result in major failure of wind turbine. b) Load bearing structural components that when failed would not result in major failure of wind turbine. c) Mechanical components that attached to the main structure.

20. Show the three equations for calculating the wind tower vibration frequencies using the Rayleigh's Method: (3%)

Task 1 Your company is currently working on a project - Solar Tracker. Solar tracker is an automated tracker which uses LDR to sense the sunlight. A microcontroller reads the LDR voltage and signals the connected motor which rotates the panel towards the Sun.