Copper and copper-nickel tubes are used for vehicle brake pipes due to their good fatigue and corrosion resistance (especially against salt on the roads), where fluid loss could be disastrous. Because of their ductility, they are easy to fit; they are standard equipment for many cars, fire engines, military vehicles, JCBs and other heavy vehicles.
The same or better performance can be achieved with less tube and fin material. In other words, more heat can be dissipated with less material. Less tube, more heat! Technically speaking, a coil made with smaller diameter tubes can be designed with a higher ‘heat transfer coefficient’ compared to a coil made with larger diameter tubes.
The following brasses have sufficient strength, machinability and electrical conductivity:
CW508L (CZ108), CW509L (CZ109) and CW614N (CZ121).
Since ancient times copper has been used in coins; the Romans used copper widely in this application. The reasons for using copper are its excellent corrosion resistance, ease of stamping, good electrical conductivity for vending machines and ease of recycling.
Because the thermal conductivity is so high – it is 23 times better than stainless steel or titanium and 1.6 times better than aluminum.
New, harmonized terminology is discussed and proposed in a paper published recently in the International Journal of Life-Cycle Assessment (LCA), entitled “Mineral resources in life cycle impact assessment—defining the path forward”. Co-authored by the ECI, this new paper, supports the LCA practitioners to build mutual understanding with the mineral industry, and recommends tools for use in life cycle sustainability assessment.
Condenser coils with round copper tubes and aluminium fins have been a winning combination for ACR coils for many years. Manufacturers enjoy the assembly advantages provided by these components while technicians find it easy to join and repair copper tubing in the field. More importantly, this well established technology has a proven record of durability in the field resulting in a high level of customer satisfaction.
Smaller diameter tubes allow for more effective heat transfer.
1 degree, using batten rolls.
The Coalition for ENERGY SAVINGS, May 2015