Abstract
To enhance the cooling capacity of a single air inlet induced draft cooling tower (SIDCT), the stepped fill layout pattern is proposed in this paper. A three-dimensional numerical model is established and validated by field measurement data. The cooling capacity of towers equipped with uniform fill and stepped fill is compared under various crosswind velocities (0 m/s–12 m/s) and crosswind angles (0°–180°). The results showed that the ventilation rate of the total tower with stepped fill is increased. Under the studied crosswind velocity and angle, the cooling capacity of the stepped fill tower is superior to the uniform fill tower. After using stepped fill, the mean drop of outlet water temperature rises by 0.29 °C, 0.27 °C, 0.17 °C, 0.10 °C, and 0.19 °C, corresponding to crosswind angles from 0° to 180°. The increment of cooling capacity is the maximum under the crosswind angles of 0° and 45° and is the minimum under the crosswind angles of 90° and 135°. The maximum increased value of N is 0.65 under the crosswind velocity of 4 m/s, 0.85 under 8 m/s, and 0.95 under 12 m/s.
Highlights
To enhance the cooling capacity of a single air inlet induced draft cooling tower (SIDCT), the stepped fill layout pattern is proposed in this paper
With different installation positions of a fan, Mechanical draft cooling towers (MDCTs) can be classified into forced draft cooling towers (FDCTs) and induced draft cooling towers (IDCTS) [1]
Many investigations have been performed by scholars to analyze the impact of operation parameters on ventilation and thermal performance of the MDCT
Summary
To enhance the cooling capacity of a single air inlet induced draft cooling tower (SIDCT), the stepped fill layout pattern is proposed in this paper. The cooling capacity of towers equipped with uniform fill and stepped fill is compared under various crosswind velocities (0 m/s–12 m/s) and crosswind angles (0◦ –180◦ ). Under the studied crosswind velocity and angle, the cooling capacity of the stepped fill tower is superior to the uniform fill tower. Mechanical draft cooling towers (MDCTs) are mainly cooling equipment, with heat transfer from circulating water (heat water) to the ambient air. The cooling capacity and ventilation performance of MDCTs markedly affect the working efficiency of these industrial processes. Revealed that input parameters influence the cooling tower performance, including hot water temperature, water flow rate, air mass flow rate, and stage numbers of packing, with combination thermal image technology. The results indicated that the air mass flow rate, hot water temperature, and stage numbers of packing directly influence cooling efficiency
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