Zent

The Zent air conditioning unit is an innovative HVAC system designed to provide comfortable indoor air conditions under varying climatic scenarios. Utilizing evaporative cooling through a cellulose pad in the summer and a finned-tube hot water coil for winter heating, this device efficiently meets both cooling and heating demands with low energy consumption.
Structure and Function of the Cellulose Pad in Summer Cooling
One of the key components of the Zent unit is the cellulose pad, which serves as the core of the evaporative cooling system. This pad is made of woven cellulose fibers structured in a specialized network that creates a high contact surface area between air and water. Water is evenly distributed from the top onto the pad, and air is drawn through it by a fan. During this process, water evaporates from the pad surface, lowering the temperature of the passing air. The cooling effect can approach the wet-bulb temperature of the ambient air, making this system especially effective in dry or low-humidity environments.
The Zent cellulose pad’s dense and durable structure allows high water retention, increasing the air-to-water contact time and thereby enhancing cooling efficiency. Compared to conventional pads, this type offers superior durability and longevity, reducing maintenance and replacement frequency.
Hot Water Finned-Tube Coil Heating System for Winter
During the winter season, the Zent unit employs a hot water finned-tube coil, commonly used in industrial and residential HVAC systems for heating. This coil consists of metal tubes outfitted with fins that increase the heat transfer surface area. Hot water or steam at controlled temperatures flows inside the tubes, transferring heat to the air as it passes over the fins and tubes.
Typically constructed from copper or aluminum—materials known for high thermal conductivity—the finned-tube coil ensures excellent heat exchange performance. Hot water fed from boilers or central heating sources circulates through the coil tubes, transferring its thermal energy to the air, thereby raising indoor temperatures for comfortable heating.
The primary advantage of the finned-tube coil in the Zent unit is its precise control over outlet air temperature and its ability to increase heat capacity without enlarging the coil size. Additionally, the large heat transfer surface area maintains low air pressure drop, minimizing fan energy consumption.