The difference between plate air cooling and surface evaporative air cooling

The structure of the surface evaporative air cooler consists of a water tank, light tube bundle, spray demisting, pre-cooling, fan and other components. It is a new type of high-efficiency cooling equipment that integrates water cooling and air cooling, heat transfer and mass transfer processes, and has the best of both worlds. It has the characteristics of compact structure, high heat transfer efficiency, low investment, low operating cost, convenient installation and maintenance, and small floor space. Suitable for oil refining, chemical industry, metallurgy, refrigeration, light industry, electric power and other industries. The principle is that the evaporation of the water film outside the tube enhances heat transfer, that is, the sensible heat transfer of ordinary air cooling is sublimated into latent heat transfer. Its advantages are:: 1. The medium can be cooled to the ambient wet bulb temperature +5℃ ； 2. The floor space is saved by more than 1 times ； 3. Save 35.5% on operating costs ； 4. Save 15% on investment fees ； 5. Heat transfer efficiency increased by more than 40% ； 6. Suitable for temperature

Working principle of surface evaporative air cooler: The surface evaporative air cooler is a highly efficient condensation cooling device that integrates water cooling, air cooling, and mass and heat transfer processes. Its working principle is to use a pump to transport the circulating water in the lower storage tank to the spray distributor located above the horizontally placed light tube bundle. The nozzle of the distributor sprays the cooling water downward onto the surface of the light tube, so that the outer surface of the tube is moistened and a continuous water film is formed. At the same time, a fan is used to suck air in from the lower air suction window of the equipment and sweep across the light tube bundle from bottom to top. The heat transfer process relies on the sensible heat transfer between the water film and the air on the one hand. ； On the other hand, the rapid evaporation of the water film outside the tube is used to enhance the heat transfer outside the tube. Since the latent heat of vaporization of water is very large, the evaporation of the water film enhances the heat transfer on the outer surface of the tube, making the overall heat transfer efficiency of the equipment much higher than that of a simple air cooler or water cooler. Structural features of surface evaporative air cooler: (1) The biggest feature of the surface evaporative air cooler is that it combines the cooling tower and the tube-type heat exchanger into one. It eliminates the need for a separate circulating water system and reduces the equipment footprint. (2) Using light tubes as heat transfer tubes can * * Reduce one-time investment in equipment. (3) The resistance of the light pipe is small, and the fan load is reduced accordingly. Heat transfer characteristics of surface evaporative air cooler: (1) The surface evaporative air cooler is suitable for condensation cooling of media with an inlet temperature below 80°C. The outlet temperature of the cooled medium can be close to the ambient wet bulb temperature. (2) The surface evaporative air cooler can simultaneously utilize the latent heat and sensible heat of the cooling water. The heat transfer effect is 34% higher than that of water cooler.

The tornado plate air cooler includes a box, a spray device, a fan and a plate bundle. Two sets of plate bundles stand on both sides of the box. The fan is set on the top of the box. There is a tornado guide device in the lower part of the box cavity. The tornado guide device has multiple arc-shaped spoiler blades. These spoiler blades are evenly spaced in an annular shape to form a cyclone. The gas enters the cyclone laterally through the plate bundle to generate a tornadic vortex, which moves freely upward in a spiral trajectory in the annular flow channel, inducing the formation of a tornado effect at the bottom, which increases the air pressure difference between the bottom of the box and outside the box. The upper and lower pressure differences of the air between the entire circulation plate bundle are relatively uniform, eliminating the lower dead zone. This improves the heat transfer efficiency between air and process medium and reduces energy consumption. The invention integrates the advantages of a plate heat exchanger and a traditional air cooler and is suitable for cooling products in the oil refining industry. It mainly uses air cooling, has a small footprint and compact structure, and is especially suitable for places lacking water. Plate air cooler is used to cool down or condense process fluids in the production process of petrochemical and other fields. It includes a frame, a fan, and a plate tube bundle. The upper and lower ends of the plate tube bundle are connected with pipe boxes. The upper end of the upper pipe box is equipped with a medium inlet, and the lower end of the lower pipe box is equipped with a medium outlet. Two sets of plate tube bundles are placed on both sides of the frame, and the fans are set on the frame. There are air inlets, blinds, and spray devices on the outside of each group of plate tube bundles. The utility model can obtain a more reasonable ratio between the heat transfer area and the air cooling area, and avoid the heat transfer bottleneck caused by the relative insufficient heat transfer area in the tube. ； Optional smaller fan ； Avoid uneven temperature and expansion of heat pipes ； Improve heat transfer efficiency ； Small size, light weight and compact structure.