Tube fin type heat exchanger of side positioned longitudinal whorl generator

Abstract

The invention relates to a fin tube type heat exchanger of a side positioned longitudinal vortex generator. The fin tube type heat exchanger is provided with a plurality of groups of straight substrates which are mutually arranged at intervals of a certain spacing and mutually parallel and a plurality of heat exchanging tubes vertically penetrated through the straight substrates, and a triangle winglet shaped longitudinal vortex generator is arranged at the two sides of each heat exchanging tube. In the heat exchanger of the invention, a plurality of triangle winglets are arranged at the two sides of the heat exchanging tubes, to prompt that the longitudinal vortex is formed at the air side, and simultaneously, a speed passage is formed among the heat exchanging tube wall, the triangle winglets and the fin, to ensure that the boundary layer separation point at the position of the heat exchanging tubes wall is delayed, the wake zone at the back of the heat exchanging tubes is diminished, the boundary layer is attenuated, and the mixture of cool and hot fluids is improved, thereby the heat exchange is greatly enhanced and the resistance force is slightly increased. The fin tube type heat exchanger has the advantages that heat transfer efficiency is high, the structure is compact, the floor area occupation is small, thus to be suitable for large-scale mechanized production.

Description

Technical field [0001] The invention relates to a tube-fin heat exchanger, in particular to a tube-fin heat exchanger with a side longitudinal vortex generator applied in the field of heating, ventilation and air conditioning. Background technique [0002] The tube-fin heat exchanger is a common heat exchange equipment in the HVAC industry. In this type of heat exchanger, the liquid medium flows in the tube and the air flows outside the tube. Due to the thermal physical properties of the air itself, the heat transfer coefficient on the outside of the tube (air side) is much lower than that on the inside of the tube (liquid side). Heat transfer coefficient. Therefore, strengthening the air-side heat transfer is the key to improving the overall performance of the heat exchanger. In order to enhance the air-side heat transfer, the main common measure is to design various enhanced heat transfer fins, such as corrugated fins, slit fins, and shutter fins. Chinese patent 96114435.1 disc...

AI Technical Summary

Problems solved by technology

[0003] The above measures to strengthen the fins all achieve the purpose of heat transfer enhancement by changing the mainstream flow on the air side. While the heat transfer is enhanced, its resistance is also greatly increased, which also means that its pump power consumption is greatly increased.

Images