What are the performances of finned tube heat exchangers?

What are the performances of finned tube heat exchangers?

The finned tube heat exchanger is one of the most successful inventions in the process of improving tubular heat exchange. It is widely used in dehumidification, drying, air heating in heating and ventilation systems or air cooling in air conditioning systems, power, petroleum, chemical and other industries.

The finned tube heat exchanger is a commonly used heat exchange equipment in the industry. The finned tube heat exchanger is mainly composed of a heat dissipation pipe and an outer frame. Classification by heat medium: hot water type, steam type; classification by different materials: carbon steel, stainless steel; classification by finned tube process: winding type, rolling type, string type.

Features of finned tube heat exchangers

The finned tube heat exchanger not only has the inherent characteristics of good heat transfer, light weight, small volume, small temperature difference, and fast thermal response, but also has the advantages of convenient installation, long service life, simple maintenance, and low resistance loss. It has the characteristics of easy separation and no leakage from each other.

1. Good overall heat transfer performance

The finned tube heat exchanger relies on the phase change of the internal medium to achieve heat transfer. It is very economical for low-grade heat energy recovery. The fins on the outside of the heat pipe greatly reduce the convective heat transfer resistance on both sides and greatly increase the heat transfer area. Thereby increasing the heat transfer. In addition, the finned tube heat exchanger can easily realize the pure countercurrent flow of the hot and cold fluids and the vertical swept flow outside the fluid tubes, and increase the average temperature and pressure of the cold and hot fluids and heat transfer without changing the inlet temperature of the cold and hot fluids.

2. It has a strong ability to prevent ash accumulation and ash blocking

The flue gas traverses the outside of the tube for heat exchange, and the flue gas is more turbulent. In addition, the high temperature of the finned tube wall keeps the outside of the tube in a dry state, so it does not stick to dust and coke, which can effectively prevent clogging.

3. The heat transfer surfaces on both sides of the hot and cold fluid can be freely arranged

The heat exchange element of the finned tube heat exchanger is a finned tube, and its evaporating section, condensing section length and fin ratio are independently determined on each side according to the given heat transfer, fluid temperature, flow rate, properties and cleanliness. Fluid, the two sides do not interfere with each other, ensuring that the finned tube heat exchanger can be suitable for heat transfer and cleanliness between the two fluids in the structure.

4. It has high-efficiency low-temperature anti-corrosion ability

When the finned tube heat exchanger is used for waste heat recovery of corrosive flue gas, ND steel seamless tube can be used, and the temperature of the heat exchange tube wall can be adjusted by adjusting the process structure, so that the heat exchange tube can avoid the maximum corrosion temperature range as much as possible.