Heat Exchange Device with Variable Tube Material

A heat exchange device utilizing variable tube materials is provided. In one particular embodiment, the heat exchange device is an evaporative condenser with a multi-pass tube bundle. The first few tube passes (typically 1-3 tube passes) of the tube bundle, which in operation are typically exposed to superheated refrigerant gas, are comprised of a material that is highly resistant to corrosion (e.g., 316/316L stainless steel). The remaining tube passes, which in operation are typically exposed to a lower-temperature refrigerant (i.e., saturated two-phase or subcooled liquid), are comprised of one or more lower-cost, less corrosion-resistant material (e.g., 304/304L stainless steel).