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Performance optimization of coupled heat and mass transfer in closed wet cooling tower.

Number: pap. 335

Author(s) : JIANG J., ZHANG L., LIU X., et al.

Summary

Closed wet cooling tower (CWCT) is a popular application device in the HVAC field, which combines a coupled heat and mass transfer process between the ambient air and the spray water and a heat transfer process between the process water and the spray water into one compact device. This paper aims to optimize the flow type of the CWCT according to the driving force uniformity principle. Numerical models of different flow types were established and validated by experimental data. Good agreement shows between the predicted results and the experimental values. The recommended flow type in literatures and markets is air and process water flowing in the opposite direction and spray water flowing in the cooling water’s direction, which means two counter flows and one parallel flow. Based on the simulation results, the driving forces of the recommended type are non-uniform, which indicates that there is still potential to improve the performance. The cross flow (air and cooling water flowing in counter flow, spray water and the other fluids flowing in cross flow) CWCT is proposed and proved to have better performance than the recommended flow type since it has more uniform driving forces.

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Pages: 11 p.

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Details

  • Original title: Performance optimization of coupled heat and mass transfer in closed wet cooling tower.
  • Record ID : 30008881
  • Languages: English
  • Source: Clima 2013. 11th REHVA World Congress and 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings.
  • Publication date: 2013/06/16

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