Introduction of DYJ series industrial chiller refrigeration heat exchanger and analysis of its heat transfer process

In the field of industrial chillers, refrigeration heat exchangers—especially condensers and evaporators—are among the four core components of the refrigeration cycle. These devices play a crucial role in determining the system's efficiency and its ability to absorb and release heat. While we often focus on condensers and evaporators, other components like intercoolers and subcoolers also serve similar functions, though they are less frequently discussed. Water-cooled chillers typically use cooling towers as part of their heat rejection system, which is essential for large-scale centralized cooling applications. Although not technically a refrigeration heat exchanger, the cooling tower plays an important role in the overall heat exchange process. So, how does the heat transfer process work? In an industrial chiller, high-pressure, high-temperature refrigerant vapor enters the condenser, where it is cooled by air or water, transforming into a liquid state. On the other side, low-temperature refrigerant liquid flows into the evaporator, absorbing heat from the surrounding air or brine, and then vaporizes. This process allows the system to lower the temperature of a specific area, achieving the desired cooling effect. The heat transfer occurs through the walls of the tubes that separate the refrigerant from the external fluid. There are three main types of heat transfer processes commonly found in refrigeration equipment such as screw chillers, air-cooled chillers, water-cooled chillers, and low-temperature chillers: 1. **Flat Wall Heat Transfer**: When the heat transfer surface is flat or can be approximated as flat (such as in thick-walled pipes), heat moves from the high-temperature side to the low-temperature side through the solid wall. 2. **Tube Heat Transfer**: In most condensers and evaporators, round tubes made of copper or steel are used extensively, making tube-based heat transfer one of the most common methods in refrigeration systems. 3. **Finned Wall Heat Transfer**: To enhance heat transfer, fins or extended surfaces are often added to the heat exchange walls. This increases the effective surface area, allowing more heat to be transferred per unit time. This method is particularly useful when further increasing the heat transfer coefficient becomes impractical. Shenzhen Dongyuejin Chiller Factory has dedicated production lines for evaporators and condensers. All heat exchangers are manufactured using high-quality externally threaded copper tubes, ensuring strong sealing structures and excellent thermal performance. These units are compatible with various refrigerants, including HCFCs, HFCs, R22, and others. The design enhances the heat exchange capacity and improves the system’s efficiency in both heat absorption and rejection. For more information about industrial chillers, visit Shenzhen Chiller Factory: http://news.chinawj.com.cn Editor: Hardware Business Network Information Center – http://news.chinawj.com.cn

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