A common misconception is that range — the difference between
hot water temperature and cold water temperature — is influenced
by cooling tower performance. In reality, approach is what actually
defines the cooling capability of a cooling tower. The range is
influenced by the heat rejection of the process for which a cooling
tower serves. Whether a power plant, commercial building, or
any other application, the range will stay consistent under the
same flow and heat rejection conditions. Figure 1 shows the
relationship between approach and range. To learn more about
range, download the Cooling Tower Range Thermal Science Paper
TR-017 at spxcooling.com