据《日本经济新闻》报道,世界首创的利用地铁废热的空调系统,将于1989年春率先在日本北海道的札幌正式投入运行。日本是一个岛国,又是一个资源小国,但工业十分发达,工业用的能源(石油、煤炭等)大部分靠国外进口。因此,节约能源是日本的一项重要国策。三菱重工根据日本大城市纵横交错的地下铁道,每天要通过排 According to the “Nihon Keizai Shimbun” report, the world’s first air-conditioning system using subway waste heat will be officially put into operation in Sapporo, Hokkaido, Japan in the spring of 1989. Japan is an island country and a small resource country, but its industry is very developed. Most of the energy used in industry (oil, coal, etc.) is imported from abroad. Therefore, energy conservation is an important national policy of Japan. Mitsubishi Heavy Industries Co., Ltd