Automotive radiators have undergone numerous technological changes over the past 100 years, although none of these changes are more obvious than the metals from which the radiator is constructed. In the copper/brass radiator, the radiator's fins are made from nearly pure copper and the tubes and header tanks are made from brass. In an aluminum radiator, all components are made from an aluminum alloy.
CuproBraze technology represents a new era for heavy vehicle radiators. CuproBraze makes use of the highest quality copper and brass alloys, making it possible to produce more efficient, durable, and environmentally friendly heat exchangers, compared with traditional radiators.
The CuproBraze® radiator can be made smaller and more compact than aluminum models having comparable performance. As its name implies, the CuproBraze process makes use of brazing in place of traditional soldering to join copper and brass radiator components. Brazing uses alloys that are considerably stronger than conventional lead-tin solders. Brazing alloys are commonly applied in the form of a paste containing a protective flux, followed by heating the assembly to be joined in a furnace. Brazing alloys contain no lead.
Because brazed joints are stronger than soldered ones, it became possible to make the metal itself thinner than that used for conventional copper/brass radiators. This improvement led to a further advantage in that thin cross-sections resulted in even higher heat transfer. In all, CuproBraze radiators can be:
- More corrosion resistant
- More efficient, and therefore potentially smaller
Than their aluminum counterparts, depending on the priority assigned to the various properties. Additional benefits to the automotive OEM include lower air-side pressure drop, less parasitic engine loss (and therefore better fuel economy), as well as lower cooling module costs.