Abstract
Tokyo Electric Power Company: TEPCO) has practised the method of utilizing thermal energy discharged in substations and underground cable transmission lines for making hot water and air-conditioning with Heat Pump System, which has been effective and efficient.
TEPCO has started the practice in Ginza Branch in 1964, and recently it supplies the thermal energy not only for TEPCO's own office buildings but also for the buildings adjacent to a substaion or cable-transmission lines: that is so called” District Heating Cooling: DHC).
This paper shows the present situation of the system and explains the points which should be improved.
