High-efficiency coil pipe heating and ventilating device with Dean Vortice effect

Abstract

The invention relates to a high-efficiency coil pipe heating and ventilating device with a Dean Vortice effect. The heating and ventilating device comprises a water inlet pipe, a water inlet distributor, a water outlet converger, a water outlet pipe, a coil pipe heat-radiating pipe, a support plate and the like. A fluid medium can form Dean Vortice with symmetrical vortex core distribution when flowing in the coil pipe heat-radiating pipe, so that a remarkable promotion effect is achieved on fluid heat exchange. According to the high-efficiency coil pipe heating and ventilating device, throughanalyzing and evaluating the Dean Vortice intensity and the heat exchange efficiency, selecting a Dean Vortice intensity index corresponding to the optimal heat exchange efficiency, and optimally designing structure parameters of a heat exchange pipe and inlet and outlet parts, the fluid medium achieves a sufficient turbulence state under the conditions of less resistance and linear loss during the tube pass flowing process, the thicknesses of a flowing boundary layer and a temperature boundary layer near the pipe wall are effectively reduced, the initiative heat convection heat exchange process during the medium flowing process is improved, and the whole heat exchange efficiency of the equipment is improved. The heating and ventilating device can be widely applied to the heating and ventilating field, and is wide in application range, high in operating efficiency and high in practicability.

Description

technical field [0001] The invention relates to the technical field of heat exchanger secondary flow active enhancement of heat exchange, in particular to a high-efficiency coiled tube HVAC equipment based on DeanVortice secondary flow active enhancement of heat exchange effect. The HVAC equipment can be widely used in central heating of urban buildings And rural household heating alone. Background technique [0002] my country has a vast territory and a rich and varied climate, including tropical monsoons, temperate continents, and tropical rainforests. Most of the southern regions are in the subtropical monsoon climate, with rain all year round and cold and humid winters, seriously affecting the daily work efficiency of residents and causing a sharp decline in the happiness index of life. At present, residents in the southern region mostly use air conditioners and electric heaters for heating in winter, which have obvious disadvantages such as high energy consumption, low...

AI Technical Summary

Problems solved by technology

However, simply increasing the medium flow rate will lead to an increase in flow resistance and a sharp increase in equipment energy consumption

Enlarging the heat transfer area is one of the important ways to enhance the performance of the equipment. The heat transfer area is increased by using small-diameter heat exchange tubes and expanding the surface heat transfer surface, but this method often leads to the increase in equipment volume, technical facilities and investment. The increase restricts its wide application to a certain extent

Increasing the average heat transfer temperature difference is also an effective method to enhance the heat transfer performance of heat exchange equipment. It mainly uses different heat transfer surface layouts to change the average heat transfer temperature difference, or expands the inlet and outlet temperature differences to increase the average heat transfer temperature difference. The method is usually limited by the production process and economic conditions in the implementation process, and the effect is limited

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