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一、国外城市供水系统的能量消耗 1975年主要工业发达国家能耗与国民生产总值指标中,美国的能源消费量最多,日本其次,西德第三。按人口平均,美国每人平均年能源消费占世界第一位,每人平均国民生产总值为7000多美元。在国民经济生产中,城市供水系统是重要的组成部分。尤其在现代城市中,为了满足工业生产和提高人民生活水平的需要,就要求供水系统相应地发展。据日本调查,1981年全国城市供水事业用电量为60亿度,占全国总电量5227亿度的1.1％,比1976年增加12％。1981年城市供水量为132.5亿米~3,
I. Energy Consumption of Foreign Urban Water Supply Systems In 1975, energy consumption and GDP of major developed countries were among the highest in the United States, followed by Japan and West Germany. According to the average population, the average annual energy consumption per capita in the United States accounts for the first place in the world, and the average GNP per capita is more than 7,000 US dollars. In the national economy, the urban water supply system is an important part. Especially in modern cities, in order to meet the needs of industrial production and improve people’s living standards, the water supply system is required to develop accordingly. According to a Japanese survey, in 1981, the national electricity consumption for urban water supply was 6 billion kWh, accounting for 1.1% of the country’s total electricity consumption of 522.7 billion kWh, an increase of 12% over 1976. In 1981, the urban water supply was 13.25 billion m 3 ,