Research on economical cooling supply distance of district cooling systems

Establishes the optimal model of economical cooling supply distance of district cooling system (DCS) and develops the solution program. The results of a case calculation demonstrate that the cooling load density and the temperature difference between supply and return chilled water of secondary piping network are both important influencing factors of the economical cooling supply distance of DCS, but the effect of the latter is greater; and that the economical cooling supply distance increases with the growing of the cooling load density when the chilled water temperature difference is 10 ℃ or 8 ℃; and that the DCS is not suitable for the region with very low cooling load density; and that the chilled water temperature difference of smaller than 5 ℃ is not suitable for the DCS.