新型可再生能源.ppt

Alternative sources of energy(solar energy,nuclear energy and biogas);Introduction of alternative sources of energy What is alternative sources of energy 什麼是另類能源 Why do we use alternative sources of energy 為何人類需要使用另類能源 Types of alternative sources of energy Solar energy 太陽能 Nuclear energy 核能 Biogas 生物氣 ; Alternative energy sources(另類能源) are defined as any energy source and certain non-energy applications that can replace or reduce(取代或減少) the use of conventional(傳統的) crude oil, natural gas, and coal(原油,天然氣和媒).? This is a broad definition but it is helpful in avoiding concentrating on only pristine alternative energy sources, e.g., solar energy, wind energy, tidal energy, biomass, etc. ;Alternative sources of energy are much cleaner than fossil fuels They are permanent supply They produce much less pollution than fossil fuels 另類能源遠比化石燃料清潔 它們有無限的供應量 它們產生的污染遠比化石燃料少;Solar energy is an energy from sun which is renewable and very clean. It will not produce any pollution and consume natural resources or cause global warming. Solar energy can be converted directly or indirectly into other forms of energy, such as heat and electricity. Nowadays, solar energy is used widely in our life. In general, there are two main method to take advantage of solar energy including photoelectric transformation and opto-thermal transformation. 太陽能是來自太陽的可再生能源，它是非常清潔，而且不會產生任何污染、耗損自然資源和導致全球增溫。而太陽能可以直接或間接地轉化成其他的能量形式，如熱能和電能。今時今日，太陽能已被廣泛應用於我們的生活中。一般上，我們有兩種途徑利用太陽能，包括”光電轉換”及”光熱轉換”。 ;Photoelectric transformation is the conversion of sunlight into electricity through a photovoltaic (PVs) cell (solar cell) using the principle of photoelectric effect. A photovoltaic cell is a non-mechanical device usually made from semiconductor (silicon). 光電轉換意指利用光電效應的原理，以太陽能電池來把陽光轉換成電能。而太陽能電池是以矽 半導體製成的。;Opto-thermal transformation is the conversion of sunlight to thermal energy using solar collector. The energy produced are used in heating water, heating swimming pool, etc. 光熱轉換是指利用集熱器把陽光轉換成熱能。而所得的熱能可用作把水加熱，