Cooling loss of the secondary piping network in district cooling system

Presents the calculation method of cooling loss and temperature rising caused by cooling loss of the variable water flow secondary piping network in district cooling system ( DCS ).A calculation result shows that when the heat insulating materials satisfy the specified requirements and constructed adquately, the cooling loss of the secondary piping network in DCS is less than 1％ of its conveying cooling energy, the cooling loss of the secondary pump is the key factor in the total cooling loss, and the temperature rising caused by the cooling loss can not obviously influence the user in DCS. It also indicates that the cooling load ratio affects the cooling loss and its temperature rising remarkably.