What material is commonly used in the construction of evaporator coils?

The construction of evaporator coils commonly uses materials like copper or aluminum due to their excellent thermal conductivity properties. These materials efficiently transfer heat and allow for effective heat exchange processes, which are crucial for the refrigeration cycle. Copper, in particular, is favored for its high thermal conductivity, resistance to corrosion, and durability; it also has a high level of malleability, making it easy to manufacture into various forms. Aluminum is lighter than copper and also offers good thermal conductivity, making it a more cost-effective option in many applications.

The other materials listed have characteristics that make them less suitable for this specific purpose. Plastic, for example, does not have the necessary thermal conductivity to facilitate efficient heat transfer. Stainless steel, although durable and resistant to corrosion, generally has poorer thermal conductivity compared to copper and aluminum, making it less effective for evaporator coils. Iron, while sometimes used in certain applications due to its strength, is prone to corrosion and lacks the thermal efficiency needed for effective refrigeration systems.