抄録
The city water heating system is examined, which provides the hot water through the water pipe after being heated up by the exhaust heat of the garbage incineration plant. Utilizing the existing water pipe line is more economical than constructing a dedicated new pipe line. However, it is assumed that the temperature of the water will be cooled down as the heated water travels in the water pipe because the pipe line has not insulation in Japan. Hence, we need to calculate easily the heat loss in the water pipe line network in urban area. This report presents the method to calculate the heat loss along the water pipe line by expressing the thermal diffusion from the pipe in soil by the response factor method.
