太阳能是一种既没有污染又不需要运输的廉价能源。利用太阳能,对于燃料短缺的广大农村具有重要的现实意义。现将太阳能热水器的具体做法介绍如下。太阳能热水器可为家庭提供洗衣、洗澡、炊事等使用的热水。水温夏季时一般可达到50～60℃,而且构造简单,成本低廉,适用范围广,南纬45°和北纬45°之间地区使 Solar energy is a cheap energy that is neither polluted nor transported. The use of solar energy has important practical significance for the vast rural areas where fuel is scarce. The specific practices of solar water heaters are described below. Solar water heaters provide homes with hot water for washing, bathing, and cooking. The water temperature can generally reach 50-60°C in summer, and the structure is simple, the cost is low, and the application scope is wide. The area between the south latitude 45° and the north latitude 45° makes it