Renewable Energy PPKSE 06/07 SAA. Wind energy Derived from movement of the air. Caused by...
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Transcript of Renewable Energy PPKSE 06/07 SAA. Wind energy Derived from movement of the air. Caused by...
Wind energy
• Derived from movement of the air.• Caused by differences in atmospheric
temperature and rotation of the earth.• Depending on climate condition and
geographical topology, wind varies in intensity over a day, season or a year.
• Wind farm use turbines ti harness wind energy and generate electricity.
• Wind turbines usually have three blades.
• A single wind turbine typically can power 500 homes.
• The site must receive strong and steady wind throughout the year (>23km/h on average) and also close to electricity grid.
• Wind energy costs are directly related to available wind speeds.
Biomass energy
• Biomass refers to any organic matter on earth.
• In Malaysia, biomass resources are mainly from palm oil mill residues, bagasse, rice husks and wood/forest residues.
• Gasification is a recent technology of converting solid biomass into gas for use in a gas engine or a turbine to generate electricity.
• Application: palm oil industry at Keck Seng Bhd in Masai, Johor and food industry in Shah Alam
Hydropower
• Hydro-electric power is electricity produced from the kinetic energy of falling water.
• Water is held in a dam and allowed to flow through a turbine and generator to produce electricity.
• The amount of energy produced is determined by the height from which the water falls and its flow rate.
• Generation of hydropower does not produce any greenhouse gas emissions.
Cogeneration • Simultaneous production of two or more
forms of usable energy from a single energy source.
• A high efficiency energy system that produces both electricity and valuable heat from only one fuel source.
• Cogeneration cycle consist of:• Topping cycle – fuel used to produce
electrical energy first, then thermal energy.
• Bottoming cycle – fuel used to produce thermal energy then electrical energy.
Ideal cogeneration site
• Requires reliable power• Has a relatively steady electrical and
thermal energy demand pattern• Has a higher demand for thermal energy
compared to electrical energy• Has a long operation hours in a year• Inaccessible to the grid
Cogeneration in Malaysia
• Has existed in Malaysia for long time, but more can be done.
• District cooling most common due to tropical climate.
• Licensing under purview of Ministry of Energy, Water & Communication.