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Rotating contacting disk-based improved cooling tower - concept along with demonstration results.

Number: 2520

Author(s) : RANE M., RANE A.

Summary

Cooling towers are widely used in industrial and commercial applications. There are various types of cooling towers with or without fills and with or without mechanical draft. Small to medium capacity cooling towers often use fans to induce airflow through the fill. Water quality and cycles of concentration often dictate the selection of fill and the water distribution setup. Range and approach along with the type of fill govern the airside pressure drop. Using mist and drift eliminators reduce the water required, but they increase the airside pressure drop. These factors dictate the fan power in the Induced Draft Cooling Towers, IDCT, or the height of the hyperboloid towers in the Natural Draft Cooling Towers, NDCT, ultimately affecting the life cycle cost of a cooling tower.
The paper presents a novel modular maintenance-friendly energy-efficiently cooling tower that can be deployed for a wide range of applications and capacities. The textured rotating disk-based contacting media offers excellent wettability; it can be operated over a wide range of L/G ratios from 0.5 to 3 and can handle water with high total dissolved solids, TDS, without scale formation on the disks. A rotating contacting disk, RCD, based cross flow cooling tower is developed and demonstrated in the Heat Pump Laboratory at IIT Bombay. Very high surface densities are possible, in the range of 300 to 400 m2/m3. Airside pressure drop through the RCD is typically less than 10 Pa (1 mm H2O). Also, mist and drift eliminators can be eliminated by judicious design using RCD. These RCD-based cooling towers can also be used with wastewater or seawater. Fouling of the RCD is not an issue as this type of RCD has been operating as effluent concentration and seawater concentration systems in the industry, for more than a year now.

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  • Original title: Rotating contacting disk-based improved cooling tower - concept along with demonstration results.
  • Record ID : 30030762
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022

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