Oval tube heat exchanger characteristics
The elliptical tube heat exchanger delays the bypass flow around the outside of the tube and reduces the pressure drop outside the tube. For the flow in the pipe, the equivalent diameter of the pipe is reduced, which is favorable for heat exchange. At the same time, the reduction in the spacing of the elliptical tubes allows more heat exchange tubes to be arranged in the same space. It has been proved by experiments that the wind-side resistance, thermal conductivity, and heat transfer efficiency of the elliptical tube heat exchanger are all superior to the circular tube heat exchanger. The elliptical tube is applied to a refrigerant-air heat exchanger, which can reduce the pressure drop on the outside air side of the tube, strengthen the heat exchange capacity of the heat exchanger, increase the evaporation temperature, lower the condensation temperature, and can improve the air-conditioning system COP.