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一、能源、能源形势及节能 1.能源和能源分类能源系对载能体和载能物质及其资源的统称。能源的种类很多,分类方法也各有不同。一般分:一次、二次能源;生物、非生物能源;再生、非再生能源;清洁、非清洁能源;高品位、低品位能源等。通常把未经转化的载能物质或载能体称为一次能源,如原煤、原油等;经过转化和加工的称为二次能源如电。但也不是绝对的。由于使用方式和转换方式不同,有的载能体有时是一次能
I. Energy, energy and energy conservation 1. Energy and energy classification Energy is the collective name for energy carriers and energy-carrying substances and their resources. There are many types of energy and the methods of classification vary. General points: primary and secondary energy; biological, non-bioenergy; renewable, non-renewable energy; clean, non-clean energy; high grade, low grade energy, etc. The non-transformed energy-carrying substances or energy carriers are usually called primary energy sources, such as raw coal, crude oil, etc., and converted and processed are called secondary energy sources such as electricity. But it is not absolute. Due to different modes of use and conversion methods, some energy carriers are sometimes able to