First of all: First of all, we will introduce the evaporative condenser, which is a kind of heat exchange device used to cool down the cold storage. It is composed of fans, condensation coils, heat exchange plates, boxes and other components. Evaporative condenser (Evaporativecondenser), also known as evaporative condenser, is the use of high-temperature gaseous refrigerant in the coil to absorb the heat of the refrigerant from the gaseous phase. A device that is cooled to a liquid state. Refrigeration evaporative condenser is composed of special axial flow fan, spray nozzle, electronic water descaler, airbag, PVC heat exchanger, high-efficiency dehydrator, cooling tube group, stuffing water tank, water pump, water collector, and box. And other components.
Secondly, from the working principle, the evaporative condenser is the main heat exchange equipment in the refrigeration system. Its working principle is: the superheated high-pressure refrigerant gas discharged from the compressor in the refrigeration system passes through the condenser exhaust pipe in the evaporative condenser, so that the high-temperature gaseous state The refrigerant exchanges heat with the spray water and air outside the exhaust pipe. That is, the gaseous refrigerant enters the discharge pipe from the upper port and is gradually condensed into liquid refrigerant from top to bottom. The super-strong wind power of the induced draft fan makes the spray water completely and uniformly cover the surface of the coil. The water can greatly improve the heat exchange effect by the wind force. The temperature-increasing spray water changed from a part to a gaseous state. A large amount of heat was taken away from the wind by the latent heat of vaporization of the water. The water droplets in the hot air were intercepted by the high-efficiency dehydrator, and the other water that absorbed the heat was scattered into the PVC shower In the heat exchange layer, the air is cooled by the passing air, the temperature is reduced, the water enters the water tank, and the circulation is continued by the circulating water pump. The water evaporated into the air is automatically replenished by the water level regulator.
Heat exchange tubes use various forms. Commonly used are carbon steel hot-dip galvanized tubes (also divided into round tubes and oval tubes), aluminum alloy tubes, and stainless steel tubes (also divided into 314/316 round tubes and wave receivers); Zinc-impregnated evaporative condenser is the earliest product to be used and most of the domestic users are mainly used for high-pressure gas condensation and cooling. The applicable pressure range is 0-30MPa; aluminum alloy evaporative condenser is a new type of energy-saving new generation The product is suitable for ice machine refrigerant condensation, and the applicable pressure range is 0-5MPa. The stainless steel tube evaporative condenser is mainly used in the corrosive gas cooling and condensation processes of some chemical plants.
The shell of the refrigerated evaporative condenser is generally spray-coated with galvanized sheet. Later, because it is not resistant to corrosion, aluminized zinc-plated sheet is gradually sprayed. The latest used on the market is aluminized magnesium-zinc sheet. This sheet has the characteristics of stainless steel , Does not rust, looks good, and is easy to process.
Finally, spray water from the operating principle. The water in the water collection tank is transported by the pump to the spray pipe on the top of the evaporative condenser. The nozzle is sprayed onto the outer surface of the condensation discharge pipe to form a thin water film. Part of the water in the water film After absorbing heat, it will evaporate into water vapor, and the rest will fall into the water collecting tank, and the water supply pump will be recycled. The axial fan forces air to be drawn into the coil from the top and the lower part of the side wall. The filler, saturated hot and humid air is discharged into the surrounding atmosphere. Part of the water droplets entrained in the hot and humid air are trapped by the water collector, which effectively controls the water droplets. Drift loss, the loss of atmospheric water vapor in the system is controlled by the float valve to supplement the cooling water.
Article link: http://wfzljs.com