Study on heat transfer performance of spiral fin plate collector

As an important equipment for solar thermal utilization, solar collector is the key to improve energy efficiency and reduce carbon emissions. However, in order to improve the heat transfer capacity of solar collectors, further optimization of their design and performance is the focus of current research. Although the addition of traditional ribs strengthens the lateral air-flow, it also increases the heat transfer cavity between the heat transfer mass and the heat absorbing plate. Therefore, in this paper, a new spiral finned flat plate collector is designed from the perspective of the synergistic flow of the heat exchanger mass in the transverse and longitudinal directions. The flow and heat transfer mathematical model of the new collector is established, and numerical simulations are carried out to analyze the effects of the ribbed deflector width and spiral pitch on the collector efficiency. The results show that the heat transfer capacity of the new collector is significantly higher than that of the flat plate collector. In addition, for the spiral rib with a rib height of 38 mm and a diameter of 25 mm, the optimal deflector width is 16 mm, the spiral pitch is 160 mm, and the deflector angle is 33.92?