ME7725 Green Engineering & Energy Efficiency

ME7725 - Green Engineering & Energy Efficiency - Kingston University London

LO1:Discuss environmentally related technologies and materials that are fundamental in a range of industries including construction, structural mechanics, automotive and environmental operations.

LO2:Discuss environmental issues related to resource provision and consumption necessary for the manufacture of engineered products, and analyse potential for the application of alternative energy sources.

LO3:Specify and develop energy efficient and environmentally conscious products.

Assessment task

The aim of this assignment is to extend your ability to apply analytical techniques to the design and performance of wind turbines.

Requirements:

Wind Turbine Technology and Application

In this part of assignment 2 there are SIX problems related to wind turbine which you need to answer all.

Problem 1

(a) Estimate the annual energy production from a horizontal axis wind turbine with a 35 m diameter operating in a wind regime with an average wind speed of 7 m/s based on average speed data only. Assume that the wind turbine is operating under standard atmospheric conditions (air density ? = 1.225 kg/m3) and the turbine efficiency is 0.42.

(b) Find the size of a wind turbine rotor (diameter in m) that will generate 300 kW of electrical power in a steady wind (hub height) of 8 m/s. Assume that power coefficient Cp = 16/27 and electro/mechanical efficiency ? = 1.

Problem 2

(a) Estimate the wind speed at a height of 110 m over surface terrain with a few trees, if the wind speed at a height of 10 m is 5 m/s.

(b) Wind turbine blades are made in many different ways and from many different materials. Discuss the most important factors in the selection of materials for blade construction and describe how wood composite and glass fibre reinforced plastic is used to make blades.