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随着能源供应的日趋紧张,新能源的开发日益被重视。太阳能是一种巨大、清洁的能源,但它的能流密度低、变化大。由于热水的品位的较低,比较适合于太阳能加热,因此引起了美国、日本、中国等很多国家能源专家的重视。目前,我国的太阳能热水器主要采用金属材料(以钢材为主),锈蚀问题长期得不到解决;又国内外主要采用集热器和储水箱分成两体的外自然循环太阳能热水器及合一式无循环太阳能热水器,前者成本高,后者虽成本低,但热效率也低。
With the increasingly tense energy supply, the development of new energy is paid more and more attention. Solar energy is a huge, clean source of energy, but its energy density is low and varies greatly. Due to the low grade of hot water, which is more suitable for solar heating, it has attracted the attention of energy experts in many countries, such as the United States, Japan and China. At present, the solar water heaters in our country are mainly made of metal materials (mainly made of steel), and the corrosion problem has not been solved for a long time. At home and abroad, natural circulation solar water heaters and integrated non-circulation Solar water heaters, the former high cost, the latter although low cost, but thermal efficiency is low.