Abstract
Thermal load of District Cooling and Heating was considered as the normal distribution curve. Then the series network of the distribution pipe with various numbers of node and two patterns of the distribution pipe with 26 nodes were selected to simulate the total friction loss of the piping network. Cosequently the concept of the diversity factor of the piping network was obtained and the proper thermal load of the piping network was gotten in considering the fluctuating thermal load to simulate the relation between the thermal load of each building and the total friction loss of the piping network by Monte-Carlo method. So the calculating method of the proper thermal load to decide the pipe diameter and the deciding method of the total friction loss for the selection of a pump were obtained.
