Optimization chilled water distribution scheme of central refrigerating station for a fast underground railway station

Sets up a system model and heat transfer model based on the fundamental heat transfer principle, makes heat transfer calculation, and analyses the temperature rise of chilled water and cold energy loss in the pipelines with the thermal insulation layers of different thickness. Analyses the initial investment and operation costs by an economic and technological method. Compares the advantages and disadvantages of the two forms of separate using and sharing the secondary pumps. The result shows that the sharing form has more superiority in both the initial investment and operation costs than the separate one.