Application of serrated finned tubes

2025-07-17

1、 Industrial thermal management system 1. Petrochemical and Energy Sector Petroleum refining: used as a heat exchanger in atmospheric and vacuum distillation, catalytic cracking and other units to process high-temperature oil and gas (300-600 ℃), with a corrosion-resistant design that can resist sulfide corrosion. Power plant waste heat recovery: The waste heat of flue gas is recovered in the tail flue of the boiler, and the toothed structure improves the heat transfer efficiency by more than 20%, reducing the exhaust gas temperature to below 150 ℃. Chemical reaction temperature control: Control the polymerization and synthesis reaction temperature, stainless steel material is resistant to acid and alkali corrosion, ensuring continuous production safety. 2. Metallurgy and Manufacturing Industry Continuous casting cooling system: Spray cooling is applied to high-temperature steel billets, and serrated fins enhance water flow disturbance, resulting in a 30% increase in cooling efficiency compared to ordinary finned tubes. Industrial kiln waste heat utilization: Recovering furnace exhaust gas heat to preheat combustion air, with an annual energy saving rate of up to 15% -25%. 2、 Refrigeration and air conditioning system 1. Large scale refrigeration equipment Central air conditioning condense...

On which side should the fins of a finned tube heat exchanger be installed

2025-07-17

In the design of finned tube heat exchangers, the installation position of the fins directly affects the heat transfer efficiency, and the fins should be installed on the side with a smaller convective heat transfer coefficient (α). The thermal resistance on this side is relatively high, and increasing the surface area of the fins can significantly reduce the overall thermal resistance and balance the difference in heat transfer capacity on both sides; On the contrary, the side with a larger alpha has lower thermal resistance, and the effect of adding fins is limited. Example: Boiler economizer: The flue gas side alpha (about 50 W/(m ² · K)) is much smaller than the water side alpha (>5000 W/(m ² · K)), and fins need to be added to the flue gas side. Air cooler: The air side alpha (about 100 W/(m ² · K)) is lower than the liquid alpha inside the tube (>1000 W/(m ² · K)), and the fins should be placed on the air side....