Condenser

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Product details Share to: Condenser Price: ¥0.00 13166153689 Book now Product details A condenser is a type of heat exchange device used to cool fluids. Water or air is usually used as a coolant to remove heat. There are partitioned coolers, spray coolers, jacketed coolers, and coil coolers, etc. Coolers exhibit excellent performance in air, oil, oil-water, and tubular cooling applications. The outstanding applications of coolers are mainly reflected in the following four aspects: (1) Water-cooled coolers: In these types of coolers, the heat released by the refrigerant is carried away by cooling water. Cooling water can be used once or recycled. Water-cooled coolers can be further divided into various types based on their different structural designs, such as vertical shell-and-tube type, horizontal shell-and-tube type, and double-tube type. ⑵Air-cooled cooler (also known as wind-cooled): In this type of cooler, the heat released by the refrigerant is carried away by air. The air can be in natural convection, or forced circulation can be achieved using fans. These types of coolers are used in Freon refrigeration systems in locations where water supply is inconvenient or difficult. ⑶Water-air cooled coolers: In these types of coolers, the refrigerant is cooled simultaneously by both water and air. However, the main mechanism for heat removal is the evaporation of cooling water on the surface of the heat transfer tubes, which absorbs a large amount of heat from the refrigerant side as the latent heat of vaporization of water. The role of air is primarily to accelerate the evaporation of water by carrying away the water vapor. Therefore, these types of coolers consume very little water, making them the ideal choice for areas with dry air, poor water quality, low water temperatures, and limited water supply. Based on their structural design, such coolers can be further divided into evaporative and spray-type types. ⑷Evaporation-condensation cooler: In this type of cooler, the cooling effect generated by the evaporation of refrigerant in another refrigeration system is utilized to cool the refrigerant vapor on the other side of the heat transfer wall, thereby causing it to condense and liquefy. The evaporator-cooler in a cascade refrigeration machine is an example of this. Performance features 1. High heat transfer coefficient. It can generate turbulence at lower Reynolds numbers (typically Re=50~200), resulting in a high heat transfer coefficient, which is generally considered to be 3~5 times that of conventional coolers. 2. The logarithmic mean temperature difference is large, while the terminal temperature difference is small. 3. Small footprint. 4. Light weight. 5. Low price. 6. Easy to produce. 7. Easy to clean. 8. Low heat loss. 9. Smaller capacity. 10. The pressure loss per unit length is high. 11. Resistant to scaling. Application areas a. Refrigeration: used as condensers and evaporators. b. HVAC: Intermediate heat exchangers used in conjunction with boilers, intermediate heat exchangers for high-rise buildings, etc. c. Chemical industry: soda ash industry, synthetic ammonia, alcohol fermentation, resin synthesis cooling, etc. d. Metallurgical industry: heating or cooling of aluminate mother liquors, cooling in steelmaking processes, etc. e. Machinery industry: cooling of various quenching fluids, cooling of reducer lubricants, etc. f. Power industry: cooling of high-voltage transformer oil, cooling of generator bearing oil, etc. g. Paper industry: heat recovery in bleaching processes, heating pulp wash liquids, etc. h. Textile industry: cooling of viscose fiber alkaline solutions, cooling of boiling nitrocellulose, etc. i. Food industry: sterilization and cooling of fruit juices, heating and cooling of animal and vegetable oils, etc. j. Fat processing: soap-based drying at atmospheric pressure, heating or cooling of liquids used in various processes. k. Centralized heating: District heating using waste heat from thermal power plants to heat water for bathing. l. Others: petroleum, pharmaceuticals, ships, desalination, geothermal energy utilization. Selection parameters: (1) Fluids that are dirty or prone to scaling should flow in the tube side, as cleaning inside the tubes is easier ； (2) Corrosive fluids should be passed through the tube side to prevent simultaneous corrosion of the tube bundle and the shell, as well as to facilitate cleaning and maintenance ； (3) Fluids with high pressure should flow in the tube side to prevent the shell from being under pressure simultaneously ； ? (4) Toxic fluids should be routed in the tube side to reduce the risk of leaks ； ? (5) The cooled fluid should flow through the shell side, which facilitates heat dissipation and enhances the cooling effect ； ? (6) Saturated steam should flow through the shell side, as this facilitates the removal of condensate and non-condensable gases, and the steam remains clean without being contaminated ； ? (7) Fluids with low flow rates or high viscosity are better suited for use in the shell side, as the baffle plates allow turbulence to be achieved at low Reynolds numbers (Re>100); however, multiple tube passes can also be employed inside the tubes ； ? (8) If there is a large temperature difference between the two fluids, it is advisable to let the fluid with a higher α flow in the shell side, thereby reducing the temperature difference between the tube wall and the shell wall. ? When making a specific choice, the aforementioned principles often cannot all be taken into account at the same time, as they may conflict with each other; in such cases, it is necessary to consider the actual situation and focus on the key issues as the basis for making a decision. Routine Maintenance 1. Methods for removing scale from the plates The efficiency and corrosion resistance of plate heat exchangers depend on whether the plate assembly remains clean. The scaling on the plates can be removed by circulating a suitable cleaning agent inside the heat exchanger, thus eliminating the need to disassemble the heat exchanger to do so ； Or disassemble the heat exchanger and manually clean the plates. 2. How to choose the right cleaning agent: Using an appropriate cleaning agent allows for the removal of scale without damaging the plates. It should be noted that the passivation (protective) film on the surface of the stainless steel sheet must not be removed. The passivation film is the main barrier that protects stainless steel from corrosion. Chlorine-containing chemicals must not be used. Such as hydrochloric acid (HCL). 3. How to perform on-site cleaning: On-site cleaning can be used to remove scale when the dirt on the plates is soluble in detergents, and the materials used in the cleaning system are resistant to detergent corrosion. On-site cleaning of cleaning agents requires a cleaning solution circulation system. The amount of circulating cleaning fluid must be at least equal to the flow rate of the fluid when the heat exchanger is operating normally. If the material has a high viscosity, the amount of cleaning solution must be increased by 20%–30%.