在清洁能源的兄弟姐妹中,太阳能是最环保的一种。太阳向地球辐射光的能量每秒达3.83×1026焦(占太阳总辐射能量的22亿分之一),这相当于500吨标准煤燃烧放出的能量,而且是取之不尽,用之不竭。上世纪50年代,美国人发明的实用太阳能电池,光电效率只有4%,但人造卫星从此有了可靠的电源。 Among the clean energy siblings, solar energy is the most environmentally friendly. The energy of the sun’s radiation of light to the earth reaches 3.83×1026 joules per second (occupies 2.2 billion parts of the total solar radiation energy). This is equivalent to the energy released from burning 500 tons of standard coal, and it is inexhaustible. It is not used. exhaust. In the 1950s, when Americans invented practical solar cells, the photovoltaic efficiency was only 4%, but satellites had a reliable power source since then.