Basic element relationship between spiral plate heat exchanger and plate-fin heat exchanger
The design theory, experimental research, manufacturing process and pioneering application of plate-fin heat exchangers are in the ascendant. In particular, the penetration of some new technologies has made it more widely applicable and has entered a new period of development. Since the fins do not directly transfer heat to the cold fluid like the partition, the fins are called "secondary surface". The following types of fins have appeared so far: straight fins, porous fins, serrated fins, corrugated fins, spiked fins, louvered fins, and finned fins. Among the spiral plate heat exchangers, there are commonly used flat fins, serrated fins, porous fins and corrugated fins.
Main features of spiral plate heat exchanger:
High heat transfer efficiency, compact, lightweight, adaptable, strict manufacturing process requirements, high manufacturing research and development costs, complex structure, limited working pressure and temperature, easy to block and corrode, relatively clean working requirements, processing technology Complex and other characteristics. Plate-fin heat exchangers have many structural forms, but the structural unit bodies are basically the same, and are composed of fins, partitions, seals and deflectors. It puts a fin on the metal plate (the so-called secondary heat transfer surface), and then puts a metal plate on it, and seals on both sides with an edge seal to form a basic unit. The upper and lower two metal plates are called For the partition. The core of the heat exchanger is composed of many such basic units.
Spiral plate heat exchanger fins are the basic components of plate-fin heat exchangers
The heat transfer process is mainly done by fins, and the part is directly completed by the separator. The connection between the fins and the separators is perfect brazing, so most of the heat is transferred to the cold fluid through the fins and through the partitions. The heat exchanger is a typical product of process machinery and a key equipment in the process, which plays an important role in chemical production. As a high-efficiency, compact and lightweight heat exchange equipment, plate-fin heat exchangers have been widely used in petrochemical, aerospace, electronics, atomic energy, weapon industry, metallurgy, power engineering and machinery. Significant economic benefits have been achieved in utilizing thermal energy, recovering waste heat, conserving raw materials, reducing costs, and some special uses.