[Ⅰ]绪言从钢铁企业之类的大型工厂排出的余热能否用于住宅民用,关于这一课题的可能性的调查和存在的问题最近已在有关方面认真进行。可是到目前为止,一般认为在日本要早期实现是极其困难的,看来在最近的将来还很少有可能把工厂与生活区直结连结起来以 [I] INTRODUCTION Whether the waste heat discharged from a large factory such as a steel company can be used for residential use, the investigation of the possibility of this issue and existing problems have recently been seriously carried out in related areas. But so far, it is generally considered extremely difficult to implement early in Japan. It seems that in the near future, it is rarely possible to connect the factory directly to the living area.