Which type of condenser is NOT water-cooled?

A single pipe condenser is typically associated with air-cooled systems rather than water-cooled systems. Air-cooled condensers use ambient air to remove heat from the refrigerant, relying on fans to circulate the air over the condenser coils, as opposed to using water to dissipate heat, which is characteristic of water-cooled condensers.

In contrast, shell and tube, tower, and plate condensers are designed to utilize water as a cooling medium. Shell and tube condensers generally pass water through tubes surrounded by refrigerant, facilitating efficient heat exchange. Cooling towers are utilized in water-cooled systems to help dissipate heat by using a cooling cycle that can involve large volumes of circulating water. Plate condensers consist of multiple thin plates that allow water to flow between them for effective cooling. All these types are designed specifically for use in systems that depend on water to transfer heat away from the refrigerant.

Therefore, the distinction lies in the cooling method utilized by the single pipe condenser, making it the type that is not water-cooled.